齋藤 英樹
理工学研究科 物質科学部門講師
理学部 基礎化学科

  • E-Mail:saitohchem.saitama-u.ac.jp

研究者情報

■ 学位
  • 博士(理学), 東京都立大学
    1994年03月
■ 研究キーワード
  • X線構造解析
  • 分子結晶
■ 研究分野
  • ナノテク・材料, 機能物性化学
  • ナノテク・材料, 基礎物理化学
■ 学歴
  • 1994年03月, 東京都立大学, 理学研究科, 化学専攻, 日本国
  • 1991年03月, 東京都立大学, 理学研究科, 化学専攻, 日本国
  • 1989年03月, 東京都立大学, 理学部, 化学科, 日本国

業績情報

■ 論文
  • Ordering Phase Transition with Symmetry-Breaking from Disorder over Non-Equivalent Sites: Calorimetric and Crystallographic Study of Crystalline d-Sorbose
    Sakiko Iwagaki; Hiroki Kakuta; Yasuhisa Yamamura; Hideki Saitoh; MAFUMI HISHIDA; Kazuhiro Fukada; Kazuya SAITO
    Crystals, 2020年05月, [査読有り]
    研究論文(学術雑誌)
    DOI:https://doi.org/10.3390/cryst10050361
    DOI ID:10.3390/cryst10050361, ORCID:73422127
  • Structure and molecular packing in smectic B Cr and A d phases of Schiff base liquid crystal compounds through the analyses of layer spacing, entropy and crystal structure               
    Hideki Saitoh
    Physical Chemistry Chemical Physics, 2017年, [査読有り]
    研究論文(学術雑誌)
    DOI:https://doi.org/10.1039/C7CP03863A
    DOI ID:10.1039/C7CP03863A, ORCID:57774441, Web of Science ID:WOS:000406334300064
  • Cell-quintupling: Structural phase transition in a molecular crystal, bis(trans-4–butylcyclohexyl)methanol               
    Saito Kazuya; Ikeda Takaaki; Yamamura Yasuhisa; Saitoh Hideki; Hishida Mafumi; Kobayashi Yutaro; Fujita Takeshi; Ichikawa Junji
    The journal of chemical physics, 巻:146, 号:7, 開始ページ:74503, 終了ページ:74503, 2017年, [査読有り]
    A structural phase transition at 151.6 K of the title compound [bis(trans-4–butylcyclohexyl)methanol] is examined by X-ray diffraction crystallography, Fourier-transform infrared spectroscopy, and adiabatic calorimetry. A general consideration on possible superstructures indicates that a single modulation wave is sufficient to drive this cell-quintupling transition. The entropy of transition determined calorimetrically indicates that two conformations are dominant in the room-temperature phase in contrast to the fivefold disorder expected from the structure of the low-temperature phase.
    American Institute of Physics, 英語, 研究論文(学術雑誌)
    DOI:https://doi.org/10.1063/1.4976318
    DOI ID:10.1063/1.4976318, ISSN:0021-9606, CiNii Articles ID:120006224115, CiNii Books ID:AA00694991, ORCID:34659311, Web of Science ID:WOS:000394579500016
  • Universality of Molten State of Alkyl Chain in Liquid-Crystalline Mesophases : Smectic E Phase of 6-Alkyl-2-phenylazulene               
    Adachi Takuya; Saitoh Hideki; Yamamura Yasuhisa; HISHIDA Mafumi; UEDA Mao; ITO Shunji; SAITO Kazuya
    Bulletin of the Chemical Society of Japan, 巻:86, 号:9, 開始ページ:1022, 終了ページ:1027, 2013年, [査読有り]
    Through thermodynamic, spectroscopic, and structural studies, the molten state of the alkyl chain in SmE phase, which is the liquid-crystalline mesophase closest to an ordered crystalline phase, has been established in a calamitic mesogen nPA. Combining the same conclusion for the SmE phase of another calamitic mesogen nTCB, it is concluded that the alkyl chain attached at end(s) of a rod-like core is molten in any liquid-crystalline mesophase. The thermodynamic implications are briefly discussed.
    The Chemical Society of Japan, 英語, 研究論文(学術雑誌)
    DOI:https://doi.org/10.1246/bcsj.20130122
    DOI ID:10.1246/bcsj.20130122, ISSN:0009-2673, CiNii Articles ID:10031194295, CiNii Books ID:AA00580132, ORCID:34658132, Web of Science ID:WOS:000326413100002
  • Reassessment of structure of smectic phases: Nano-segregation in smectic E phase in 4-n-alkyl-4′-isothiocyanato-1,1′-biphenyls               
    Saito Kazuya; Miyazawa Takahito; Fujiwara Akio; Hishida Mafumi; Saitoh Hideki; Massalska-Arodź Maria; Yamamura Yasuhisa
    The journal of chemical physics, 巻:139, 号:11, 開始ページ:114902, 終了ページ:114902, 2013年, [査読有り]
    Based on new diffraction data from aligned samples of smectic E (SmE) phase of 4-n-alkyl-4′-isothiocyanato-1,1′-biphenyls, systematics against the alkyl chain length n is analyzed. In order to perform the analysis, the molecular form factor approximated by a box-shaped distribution is calculated while taking the rounding of the distribution at corners into account. The analysis clearly shows the nano-segregated layered structure, which does not fit to the traditional structural view of SmE phase but does fit to the model the present authors proposed recently. Some implications of this conclusion are discussed in relation to the importance of the molten state of alkyl chains in most of real mesogens revealed previously through thermodynamic analyses.
    American Institute of Physics, 英語, 研究論文(学術雑誌)
    DOI:https://doi.org/10.1063/1.4821162
    DOI ID:10.1063/1.4821162, ISSN:0021-9606, CiNii Articles ID:120005343966, CiNii Books ID:AA00694991, ORCID:34658131, Web of Science ID:WOS:000324827800037
  • Structure and properties of constituents in hexane extract of frankincense               
    Hasegawa, Toshio; Kikuchi, Akiko; Saitoh, Hideki; Yamada, Hideo
    Journal of Essential Oil Research, 巻:24, 号:6, 2012年, [査読有り]
    研究論文(学術雑誌)
    DOI:https://doi.org/10.1080/10412905.2012.742468
    DOI ID:10.1080/10412905.2012.742468, ORCID:34658134, Web of Science ID:WOS:000311554000013
  • New Organic Ferroelectrics: Cocrystal of 5,5 '-Dimethyl-2,2 '-bipyridine and Bromanilic Acid               
    Yamamura, Yasuhisa; Saito, Erika; Saitoh, Hideki; Hoshino, Norie; Saito, Kazuya
    Chemistry Letters, 巻:41, 号:1, 開始ページ:119, 終了ページ:121, 2012年, [査読有り]
    Cocrystal 55DMBPH2ba was synthesized and characterized. The crystal structure is isostructural to cocrystal 55DMBPH2ia with iodanilic acid. The heat capacity, dielectric permittivity, and polarizationelectric field hysteresis showed that the 55DMBPH2ba undergoes a paraelectricferroelectic phase transition at 253K on cooling. The transition mechanism is discussed through the analysis of isotropic temperature factors of atoms. © 2012 The Chemical Society of Japan.
    研究論文(学術雑誌)
    DOI:https://doi.org/10.1246/cl.2012.119
    Scopus:https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84855324412&origin=inward
    Scopus Citedby:https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=84855324412&origin=inward
    DOI ID:10.1246/cl.2012.119, ISSN:0366-7022, eISSN:1348-0715, ORCID:34658133, SCOPUS ID:84855324412, Web of Science ID:WOS:000300480400041
  • Solid-State Thiotropolone: An Extremely Rapid Intramolecular Proton Transfer               
    Machiguchi, Takahisa; Hasegawa, Toshio; Saitoh, Hideki; Yamabe, Shinichi; Yamazaki, Shoko
    Journal of Organic Chemistry, 巻:76, 号:13, 2011年, [査読有り]
    研究論文(学術雑誌)
    DOI:https://doi.org/10.1021/jo2005796
    DOI ID:10.1021/jo2005796, ORCID:34658136, Web of Science ID:WOS:000291920900032
  • Negative thermal expansion emerging upon structural phase transition in ZrV2O7 and HfV2O7               
    Yamamura, Yasuhisa; Horikoshi, Aruto; Yasuzuka, Syuma; Saitoh, Hideki; Saito, Kazuya
    Dalton Transactions, 巻:40, 号:10, 開始ページ:2242, 終了ページ:2248, 2011年, [査読有り]
    ZrV2O7 and HfV2O7, which show negative thermal expansion (NTE) in the high-temperature phase, were investigated using X-ray diffraction and heat capacity calorimetry. Two sharp anomalies due to successive phase transitions were observed in the temperature dependence of heat capacity at 345.5 K and 373.4 K for ZrV2O7and 341.8 K and 370.3 K for HfV2O7. The smallness of their combined entropies of transition suggested that the phase transitions are of displacive type. Effective phonon densities of states (DOS) described by a simple model, and mode-Grüneisen parameters of the low-temperature phase were obtained through the spectrum analyses of heat capacities of ZrV2O7and HfV2O7. Their effective phonon DOS's show the three features common to NTE compounds: low-energy phonon mode, high-energy phonon mode, and a wide phonon gap in between. The mode-Grüneisen parameter of low-energy modes corresponding to translational and librational vibrations of the constituent polyhedra is negative but with a small absolute value due to the distortion of V2O7group in the low-temperature phase, resulting in positive thermal expansion. It is revealed that the release of the structural distortion upon the successive phase transitions with large volume increase leads to the NTE of ZrV2O7and HfV2O7in the high-temperature phase. © 2011 The Royal Society of Chemistry.
    研究論文(学術雑誌)
    DOI:https://doi.org/10.1039/c0dt01087a
    DOI ID:10.1039/c0dt01087a, ISSN:1477-9226, ORCID:34658135, SCOPUS ID:79951877720, Web of Science ID:WOS:000287665000024
  • Effects of Alkyl Length in Ligands in Mixed Valence MMX Complexes : Properties of Pt_2(n-HexCS_2)_4I (n-Hex=n-Hexyl Group)               
    IKEUCHI Satoaki; YAMAMURA Yasuhisa; MITSUMI Minoru; TORIUMI Koshiro; SAITOH Hideki; ATAKE Tooru; SAITO Kazuya
    Chemistry letters, 巻:38, 号:12, 開始ページ:1190, 終了ページ:1191, 2009年, [査読有り]
    英語, 研究論文(学術雑誌)
    DOI ID:10.1246/CL.2009.1190, ISSN:0366-7022, CiNii Articles ID:10027175973, CiNii Books ID:AA00603318, ORCID:57774457, Web of Science ID:WOS:000273859200032
  • One-dimensional correlation in the dipolar Ising crystal tricyclohexylmethanol: crystal structure revisited and heat capacity               
    Yasuhisa Yamamura; Hideki Saitoh; Masato Sumita; Kazuya Saito
    JOURNAL OF PHYSICS-CONDENSED MATTER, 巻:19, 号:17, 開始ページ:176219, 2007年05月
    The crystal structure of an organic weak-ferroelectrics, tricyclohexylmethanol (TCHM), was re-examined by single-crystal x-ray diffraction at room temperature. TCHM forms a dimer through hydrogen bonding at the centre of the dimer, where two hydroxyl groups are arranged in tandem and their direction is disordered in two possible orientations, which brings about a dipolar Ising nature. The heat capacity measured by adiabatic calorimetry from 6 to 400 K shows three anomalies including fusion at 368 K. The entropy of the ferroelectric transition is 1.9 J K-1 mol(-1), supporting the order - disorder mechanism of dimer dipoles. A broad anomaly at 348 K is related to the breakage of the intra-dimer hydrogen bond. Detailed analysis of the temperature dependence of heat capacity due to the phase transition showed the presence of a broad hump in the excess heat capacity around 160 K. The temperature dependences of the excess heat capacity and the existing dielectric constant can be analysed in terms of a highly anisotropic Ising model.
    IOP PUBLISHING LTD, 英語, 研究論文(学術雑誌)
    DOI:https://doi.org/10.1088/0953-8984/19/17/176219
    DOI ID:10.1088/0953-8984/19/17/176219, ISSN:0953-8984, eISSN:1361-648X, Web of Science ID:WOS:000246556400031
  • Low-Temperature Heat Capacity of Tricyclohexylmethanol               
    Yamamura Yasuhisa; Amano Kenichi; Saitoh Hideki; Saito Kazuya
    日露/CIS/バルチック強誘電体シンポジウム講演概要集, 巻:2006, 開始ページ:141, 終了ページ:141, 2006年
    日露/CIS/バルチック強誘電体シンポジウム組織委員会, 英語
    DOI:https://doi.org/10.11533/rcbjsf.2006.0.141.0
    DOI ID:10.11533/rcbjsf.2006.0.141.0, CiNii Articles ID:130004661583
  • Successive phase transitions of p-methylbenzyl alcohol crystal studied by X-ray and adiabatic calorimetry - Structural disorder in room-temperature phase               
    H Saitoh; S Ikeuchi; K Saito
    JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY, 巻:81, 号:3, 開始ページ:511, 終了ページ:521, 2005年08月
    Crystal structures of the room-temperature (RT) and low-temperature (LT) phases of p-methylbenzyl alcohol were reexamined by single-crystal X-ray diffraction method while paying special attention to detect structural disorder in the RT phase involved in successive structural phase transitions at 179 and 210 K. In the RT phase at 250 K, positional disorder of oxygen atoms was detected in contrast to the previous structure report. The structure of the LT phase coincided to the previous one. Heat capacities were measured by adiabatic calorimetry below 350 K, which covers the structural phase transitions and fusion at 331.87 K. The structural phase transitions were of first-order and required long time for completion. The combined magnitude of entropies of transition was ca. 5 J K-1 mol(-1), a part of which can be ascribed to the positional disorder observed in the structure analysis. Standard thermodynamic functions are tabulated below 350 K.
    SPRINGER, 英語, 研究論文(学術雑誌)
    DOI:https://doi.org/10.1007/s10973-005-0814-3
    DOI ID:10.1007/s10973-005-0814-3, ISSN:1388-6150, Web of Science ID:WOS:000231760500003
  • Effect of intramolecular pi-pi and CH-pi interactions between ligands on structure, electrochemical and spectroscopic properties of fac-[Re(bpy)(CO)(3)(PR3)](+) (bpy=2,2 '-bipyridine; PR3 = trialkyl or triarylphosphines)               
    Tsubaki, H.; Tohyama, S.; Koike, K.; Saitoh, H.; Ishitani, O.
    Dalton Transactions, 号:2, 2005年, [査読有り]
    研究論文(学術雑誌)
    DOI:https://doi.org/10.1039/b407947g
    DOI ID:10.1039/b407947g, ORCID:34658139, Web of Science ID:WOS:000225889400024
  • Spatially modulated refractive indices and optical filter characteristics in the light-induced metastable state of Na-2[Fe(CN)(5)NO]center dot 2H(2)O               
    Y Morioka; H Saitoh; H Machida
    JOURNAL OF PHYSICAL CHEMISTRY A, 巻:106, 号:14, 開始ページ:3517, 終了ページ:3523, 2002年04月
    The metastable state of Na-2[Fe(CN)(5)NO].2H(2)O crystals produced by irradiation with green or blue laser light was investigated using X-ray diffraction and spectroscopic methods. A thin crystalline plate in the metastable state placed between a pair of polarizers behaves like an optical filter. It works as the band-pass or band-reject filter, depending on the cross or parallel alignment of polarizers. A remarkable point of this effect is that the band center corresponds with the wavelength of the laser applied for producing the metastable state. This phenomenon is explained based on spatially modulated refractive indices produced by the photorefractive effect of laser irradiation. Numerical calculations using Berreman's 4x4 matrix method show that the spatially modulated population of the metastable anion exists even in the photostationary state, Similarity with the Solc birefringent filter is also discussed.
    AMER CHEMICAL SOC, 英語, 研究論文(学術雑誌)
    DOI:https://doi.org/10.1021/jp0127667
    DOI ID:10.1021/jp0127667, ISSN:1089-5639, CiNii Articles ID:80015213760, Web of Science ID:WOS:000175021900033
  • Molecular Aggregation States and Polymerizability of Potassium and Calcium 10-Undecenoates in Aqueous Systems               
    Shibasaki, Yoshio; Saitoh, Hideki; Fujimori, Atsuhiro
    Studies in Surface Science and Catalysis, 巻:132, 開始ページ:181, 終了ページ:184, 2001年, [査読有り]
    研究論文(学術雑誌)
    DOI:https://doi.org/10.1016/S0167-2991(01)82064-4
    DOI ID:10.1016/S0167-2991(01)82064-4, ORCID:34658142
  • Synthesis and properties of [Ru(tpy)(4,4 '-X(2)bpy)H](+) (tpy=2,2 ': 6 ',2 ''-terpyridine, bpy=2,2 '-bipyridine, X = H and MeO), and their reactions with CO2               
    Konno, H.; Kobayashi, A.; Sakamoto, K.; Fagalde, F.; Katz, NE; Saitoh, H.; Ishitani, O.
    Inorganica Chimica Acta, 巻:299, 号:2, 2000年, [査読有り]
    研究論文(学術雑誌)
    DOI:https://doi.org/10.1016/S0020-1693(99)00488-0
    DOI ID:10.1016/S0020-1693(99)00488-0, ORCID:34658147, Web of Science ID:WOS:000085930100005
  • Study on thermal degradation mechanisms of comb polyacrylates containing long fluorocarbon side chains by TG/FTIR               
    Shi, L.; Saitoh, H.; Shibasaki, Y.
    Journal of Polymer Science Part a-Polymer Chemistry, 巻:38, 号:15, 2000年, [査読有り]
    研究論文(学術雑誌)
    DOI:https://doi.org/10.1002/1099-0518(20000801)38:15<2794::AID-POLA200>3.3.CO;2-0
    DOI ID:10.1002/1099-0518(20000801)38:15<2794::AID-POLA200>3.3.CO;2-0, ORCID:34658146, Web of Science ID:WOS:000088202300020
  • New synthetic routes to biscarbonylbipyridinerhenium(I) complexes cis,trans-[Re(X(2)bpy)(CO)(2)(PR3)(Y)](n+) (X(2)bpy=4,4 '-X-2-2,2 '-bipyridine) via photochemical ligand substitution reactions, and their photophysical and electrochemical properties               
    Koike, K.; Tanabe, J.; Toyama, S.; Tsubaki, H.; Sakamoto, K.; Westwell, JR; Johnson, FPA; Hori, H.; Saitoh, H.; Ishitani, O.
    Inorganic Chemistry, 巻:39, 号:13, 2000年, [査読有り]
    研究論文(学術雑誌)
    DOI:https://doi.org/10.1021/ic991190l
    DOI ID:10.1021/ic991190l, ORCID:34658145, Web of Science ID:WOS:000087905000012
  • Investigation of the thermal degradation mechanisms of poly(styrene-co-methacrylonitrile)s by flash pyrolysis and TG-FTIR measurements               
    Yang, M.; Tsukame, T.; Saitoh, H.; Shibasaki, Y.
    Polymer Degradation and Stability, 巻:67, 号:3, 2000年, [査読有り]
    研究論文(学術雑誌)
    DOI:https://doi.org/10.1016/S0141-3910(99)00148-2
    DOI ID:10.1016/S0141-3910(99)00148-2, ORCID:34658144, Web of Science ID:WOS:000084957000011
  • Characterization of poly(styrene-co-methacrylonitrile)s obtained by low-temperature radiation polymerization and thermal degradation behavior measured by Py-GC and CRTG               
    Yang, M.; Tsukame, T.; Saitoh, H.; Yoshida, H.; Shibasaki, Y.
    Journal of Polymer Science Part a-Polymer Chemistry, 巻:38, 号:19, 2000年, [査読有り]
    研究論文(学術雑誌)
    DOI:https://doi.org/10.1002/1099-0518(20001001)38:19<3569::AID-POLA120>3.3.CO;2-F
    DOI ID:10.1002/1099-0518(20001001)38:19<3569::AID-POLA120>3.3.CO;2-F, ORCID:34658143, Web of Science ID:WOS:000089199800012
  • Polymorphism of acrylic and methacrylic acid esters containing long fluorocarbon chains and their polymerizability               
    A Fujimori; H Saitoh; Y Shibasaki
    JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY, 巻:57, 号:3, 開始ページ:631, 終了ページ:642, 1999年09月, [査読有り]
    The molecular aggregation of acrylic and methacrylic acid esters containing long-fluorocarbon chains: 2-(perfluoroalkyl)ethyl acrylate (FF(n)EA) and 2-(perfluoroalkyl)ethyl methacrylate (FF(n)EMA) (F(CF2)(n)CH2CH2OCOC(X)=CH2, where X=H, CH3 and n=6, 8, 10) was investigated by differential scanning calorimetry (DSC) and temperature controlled X-ray powder diffraction measurement. These compounds exhibited some characteristic polymorphic behaviors depending on the length of fluorocarbon chain and the alpha-position methyl group. The solid-state polymerization by gamma-ray irradiation was studied for these compounds in the various crystal forms. In the solid-state polymerization, highest polymerizability was observed in the crystal form that exists in the highest temperature region for each compound.
    SPRINGER, 英語, 研究論文(学術雑誌)
    ISSN:1388-6150, eISSN:1572-8943, Web of Science ID:WOS:000083716900002
  • Identification of polyethylene by differential scanning calorimetry - Application to forensic science               
    Tsukame, T.; Kutsuzawa, M.; Sekine, H.; Saitoh, H.; Shibasaki, Y.
    Journal of Thermal Analysis and Calorimetry, 巻:57, 号:3, 1999年, [査読有り]
    研究論文(学術雑誌)
    DOI:https://doi.org/10.1023/A:1010106612095
    DOI ID:10.1023/A:1010106612095, ORCID:34658148, Web of Science ID:WOS:000083716900024
  • Polymorphism of acrylic and methacrylic acid esters containing long fluorocarbon chains and their polymerizability               
    Fujimori, A.; Saitoh, H.; Shibasaki, Y.
    Journal of Thermal Analysis and Calorimetry, 巻:57, 号:3, 開始ページ:631, 終了ページ:642, 1999年, [査読有り]
    英語, 研究論文(学術雑誌)
    DOI:https://doi.org/10.1023/A:1010113420330
    DOI ID:10.1023/A:1010113420330, ISSN:1418-2874, CiNii Articles ID:80010762575, ORCID:34658150, Web of Science ID:WOS:000083716900002
  • Radiation Polymerization of Functional Monomers in Oriented Molecular System (配向分子集合系における単量体分子の放射線重合(II))               
    Y. Shibasaki; H. Saitoh; I. Hattori; Y. Ming; A. Fujimori
    Japan Atomic Energy Research Institute 1998 Activity Report (平成10年度 原研施設共同利用研究経過報告書), 開始ページ:17, 終了ページ:22, 1999年
  • Influence of molecular arrangement on the gamma-ray-irradiation solid-state polymerization of 1-octadecyl vinyl ether with a characteristic polymorphism               
    Fujimori, A; Saitoh, H; Shibasaki, Y
    Journal of Polymer Science Part a-Polymer Chemistry, 巻:37, 号:20, 開始ページ:3845, 終了ページ:3853, 1999年, [査読有り]
    The polymorphic behavior of 1-octadecyl vinyl ether was investigated by DSC and X-ray diffraction measurements under various temperatures. In DSC measurement of 1-octadecyl vinyl ether in the temperature range of -30 to approximately 50 degrees C, four transition peaks were observed on heating, whereas three transition peaks appeared on cooling. The phase-transition behavior was investigated by the repeating scanning DSC measurements. It was concluded that this compound exhibited four crystalline modifications: alpha, sub alpha, beta(0), and beta(1). It was confirmed by the temperature-controlled X-ray diffraction measurement that these phase transitions are attributed to the change of crystal systems from hexagonal packing (alpha form) to a distorted orthorhombic (O perpendicular to') system (beta(1) form) via orthorhombic (O perpendicular to) (sub alpha form) and intermediate beta(0) form, although the beta(0) form has not yet been clarified. In the gamma-ray-irradiation solid-state polymerization for these crystal forms of this compound, the polymerizability of the sub alpha form is higher than that of other forms, and that of the a form is lowest. The polymerizability demonstrated an unusual increase at a temperature of -83.6 degrees C, probably because the cationic polymerization mechanism is dominant over that of the free radical. (C) 1999 John Wiley & Sons, Inc.
    JOHN WILEY & SONS INC, 英語, 研究論文(学術雑誌)
    DOI:https://doi.org/10.1002/(SICI)1099-0518(19991015)37:20<3845::AID-POLA13>3.0.CO;2-P
    DOI ID:10.1002/(SICI)1099-0518(19991015)37:20<3845::AID-POLA13>3.0.CO;2-P, ISSN:0887-624X, CiNii Articles ID:80011348517, ORCID:34658149, Web of Science ID:WOS:000082937500013
  • Synthesis, structure and redox chemistry of 1,2-bis(ruthenocenyl)-ethylene derivatives: a novel structural rearrangement to a (mu-eta(6):eta(6)-pentafulvadiene)diruthenium complex upon two-electron oxidation               
    Sato, M.; Kawata, Y.; Kudo, A.; Iwai, A.; Saitoh, H.; Ochiai, S.
    Journal of the Chemical Society-Dalton Transactions, 号:13, 1998年, [査読有り]
    研究論文(学術雑誌)
    DOI:https://doi.org/10.1039/a801941j
    DOI ID:10.1039/a801941j, ORCID:34658152, Web of Science ID:WOS:000074924300017
  • ポリスチレン,ポリメチルメタクリレート,およびその共重合体に対するγ線照射効果               
    塚目 孝裕; 沓澤 道雄; 齋藤 英樹; 柴崎 芳夫
    高分子論文集, 巻:55, 号:8, 開始ページ:433, 終了ページ:439, 1998年, [査読有り]
    ジカル機構により注型重合したポリスチレン (PS), ポリメチルメタクリレート (PMMA), およびこれらの共重合体試料にγ線を照射し, 重合率の増加の様子を調べた. γ線照射により注型重合における重合率の上昇に効果があることが確認された. 一方, γ線の照射はポリマー鎖に対し, 架橋反応や分解反応を生じさせることが知られている. そこで, γ線の照射がPS, PMMA, およびその共重合体のポリマー鎖にどのような効果を及ぼすかをサイズ排除クロマトグラフィー (SEC) を用いて検討した. その結果, γ線照射前後で分子量分布に変化が認められ, MMAユニットは主鎖の切断による低分子量化に寄与し, Stユニットは架橋・分岐反応による高分子量化およびβ切断による低分子量化に寄与していることが確認された. さらに適当な組成のSt-MMA共重合体はγ線照射に対して優れた耐久性を示す高分子材料となるものと推定された.
    The Society of Polymer Science, Japan, 日本語, 研究論文(学術雑誌)
    DOI:https://doi.org/10.1295/koron.55.433
    DOI ID:10.1295/koron.55.433, ISSN:0386-2186, CiNii Articles ID:130003837618, ORCID:34658151, Web of Science ID:WOS:000075600000001
  • Characterization of microstructure of polyethylenes by differential scanning calorimetry               
    Tsukame, T.; Ehara, Y.; Shimizu, Y.; Kutsuzawa, M.; Saitoh, H.; Shibasaki, Y.
    Thermochimica Acta, 巻:299, 号:1-2, 1997年, [査読有り]
    研究論文(学術雑誌)
    DOI:https://doi.org/10.1016/S0040-6031(97)00132-9
    DOI ID:10.1016/S0040-6031(97)00132-9, ORCID:34658153, Web of Science ID:WOS:A1997XY79300006
  • DSC and X-ray studies on side-chain crystallization of comb-like polymers - Fluorinated n-alkyl acrylate and methacrylate polymers               
    Shibasaki, Y.; Saitoh, H.; Chiba, K.
    Journal of Thermal Analysis, 巻:49, 号:1, 開始ページ:115, 終了ページ:121, 1997年, [査読有り]
    研究論文(学術雑誌)
    DOI:https://doi.org/10.1007/BF01987428
    DOI ID:10.1007/BF01987428, ISSN:0368-4466, CiNii Articles ID:80009657641, ORCID:34658154, Web of Science ID:WOS:A1997XD48000014
  • A structural rearrangement on the oxidation of 1,2-bis(ruthenocenyl)ethylene derivatives leads to unprecedented (mu-eta(6):eta(6)-pentafulvadiene)diruthenium complexes               
    Sato, M.; Kudo, A.; Kawata, Y.; Saitoh, H.
    Chemical Communications, 号:1, 1996年
    研究論文(学術雑誌)
    DOI:https://doi.org/10.1039/cc9960000025
    DOI ID:10.1039/cc9960000025, ORCID:34658155, Web of Science ID:WOS:A1996UG03500010
  • ORGANIC METAL (DIMET)(2)BF4               
    H SAITOH; K SAITO; H ITOH; T MOCHIDUKI; K KIKUCHI; IKEMOTO, I
    ACTA CRYSTALLOGRAPHICA SECTION C-CRYSTAL STRUCTURE COMMUNICATIONS, 巻:51, 号:8, 開始ページ:1656, 終了ページ:1658, 1995年08月
    The crystal structure of bis[2-(4,5-dimethyl-1,3-dithiol-2-ylidene)-5,6-dihydro-1,3-dithiolo[4,5-b][1,4]dithiin]ylium tetrafluoroborate, 2(C10H10S60.5+) BF4-, is constructed Of two types of column which consist of donor molecules stacked along two crystallographic axes.
    MUNKSGAARD INT PUBL LTD, 英語, 研究論文(学術雑誌)
    DOI:https://doi.org/10.1107/S0108270195001806
    DOI ID:10.1107/S0108270195001806, ISSN:0108-2701, CiNii Articles ID:80008515175, Web of Science ID:WOS:A1995RW83000073
  • HEAT-CAPACITY MEASUREMENTS AND PHASE-TRANSITION OF CRYSTALLINE 4,4''-DIFLUORO-P-TERPHENYL               
    Y YAMAMURA; K SAITO; H SAITOH; H MATSUYAMA; K KIKUCHI; IKEMOTO, I
    JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS, 巻:56, 号:1, 開始ページ:107, 終了ページ:115, 1995年01月, [査読有り]
    The heat capacity of 4,4''-difluoro-p-terphenyl was measured between 8 and 303 K by adiabatic calorimetry. A phase transition associated with molecular twisting was observed as a sharp peak at (127.05 +/- 0.05) K. The enthalpy and the entropy of transition were determined as (180 +/- 20) J mol(-1) and (1.41 +/- 0.15)J K-1 mol(-1), respectively. It is pointed out that this phase transition lies in the border region between an order-disorder and displacive-type transition under normal pressure. The apparatus used for calorimetry is described.
    PERGAMON-ELSEVIER SCIENCE LTD, 英語, 研究論文(学術雑誌)
    ISSN:0022-3697, eISSN:1879-2553, Web of Science ID:WOS:A1995QL72900015
  • PHASE-TRANSITION IN CRYSTALLINE P-POLYPHENYLS - HEAT-CAPACITY OF 4,4'''-DIFLUORO-P-QUATERPHENYL               
    K SAITO; Y YAMAMURA; H SAITOH; H MATSUYAMA; K KIKUCHI; IKEMOTO, I
    SOLID STATE COMMUNICATIONS, 巻:92, 号:6, 開始ページ:495, 終了ページ:499, 1994年11月, [査読有り]
    The heat capacity of crystalline 4,4'''-difluoro-p-quaterphenyl was measured from 8 K to 303 K by adiabatic calorimetry. A broad anomaly was detected between 140 and 50 K and attributed to a sinrctural phase transition associated with molecular twisting. The temperature, the enthalpy and the entropy of transition were detemined as (200.5 +/- 0.5) K, (322 +/- 20) J mol-1 and (1.65 +/- 0.10) J.K-1.mol(-1), respectiveIy. The properties of the transition are compared with those of unsubstituted and fluorine-substituted p-polyphenyls (of two to four benzene rings in a molecule) in the Light of a unified model of displacive and order-disorder types of structural phase transition.
    PERGAMON-ELSEVIER SCIENCE LTD, 英語, 研究論文(学術雑誌)
    ISSN:0038-1098, Web of Science ID:WOS:A1994PM80100007
  • X-RAY STUDY ON STRUCTURAL PHASE-TRANSITIONS OF 4,4''-DIFLUORO-P-TERPHENYL AND 4,4'''-DIFLUORO-P-QUATERPHENYL               
    H SAITOH; K SAITO; Y YAMAMURA; H MATSUYAMA; K KIKUCHI; IKEMOTO, I
    SOLID STATE COMMUNICATIONS, 巻:91, 号:2, 開始ページ:89, 終了ページ:92, 1994年07月
    Low-temperature X-ray diffraction experiments were performed on 4,4''-difluoro-p-terphenyl (DFTP) and 4,4'''-difluoro-p-quaterphenyl (DFQP). The structure analyses were performed for the high-temperature phases and the librational motion of the benzene rings was analyzed. The super-lattice reflections were found in DFQP below about 200 K on the same positions as the low-temperature phase of p-quaterphenyl. In DFTP, the satellite reflections with small wavevector component delta(c) (about 1/6) along the c*-axis were found below the transition temperature.
    PERGAMON-ELSEVIER SCIENCE LTD, 英語, 研究論文(学術雑誌)
    DOI:https://doi.org/10.1016/0038-1098(94)90259-3
    DOI ID:10.1016/0038-1098(94)90259-3, ISSN:0038-1098, CiNii Articles ID:80007675313, Web of Science ID:WOS:A1994NX94300002
  • PHASE-TRANSITION ASSOCIATED WITH MOLECULAR TWISTING IN CRYSTALLINE 4,4''-DIFLUORO-P-TERPHENYL DISPLACIVE OR ORDER-DISORDER TRANSITION               
    SAITO, K; YAMAMURA, Y; SAITOH, H; MATSUYAMA, H; KIKUCHI, K; IKEMOTO, I
    Solid State Communications, 巻:87, 号:10, 開始ページ:903, 終了ページ:906, 1993年, [査読有り]
    The heat capacity of crystalline 4,4''-difluoro-p-terphenyl was measured from 8 K to 303 K by adiabatic calorimetry. The anomaly with a peak at (127.05 +/- 0.05) K due to a structural phase transition was detected between 100 and 160 K. The enthalpy and the entropy of transition were determined as (180 +/- 20) J.mol-1 and (1.41 +/- 0.15) J.K-1.mol-1, respectively. The properties of the transition are compared with those of p-terphenyl. The possibility is pointed out that an transition in the present compound lies in the ''transition'' region from order-disorder to a displacive type of structural phase transition.
    PERGAMON-ELSEVIER SCIENCE LTD, 英語, 研究論文(学術雑誌)
    DOI:https://doi.org/10.1016/0038-1098(93)90726-4
    DOI ID:10.1016/0038-1098(93)90726-4, ISSN:0038-1098, CiNii Articles ID:80007257121, ORCID:34658161, Web of Science ID:WOS:A1993LZ00300007
  • Crystal Structures of the Room-Temperature Phase of 4,4"-Difluoro-p-terphenyl and 4,4'''-Difluoro-p-quaterphenyl.               
    Saitoh Hideki; Saito Kazuya; Yamamura Yasuhisa; Matsuyama Haruo; Kikuchi Koichi; Iyoda Masahiko; Ikemoto Isao
    Bulletin of the Chemical Society of Japan, 巻:66, 号:10, 開始ページ:2847, 終了ページ:2853, 1993年, [査読有り]
    4,4″-Difluoro-p-terphenyl and 4,4″′-difluoro-p-quaterphenyl were synthesized and their crystal structures were determined at room temperature. These are isostructural to p-terphenyl and p-quaterphenyl, respectively. Some "disorder" in the inner benzene ring orientation was detected and resolved by the split-atom method. A rigid-body librational analysis of each benzene ring around the long molecular axis was performed. A rough estimate of the barrier height of the planar conformation for 4,4″-difluoro-p-terphenyl was obtained as being about 1 kJ mol−1. The results are compared with the properties of p-terphenyl and p-quaterphenyl, and the effect of fluorine-substitution on the molecular properties is discussed in relation to the low-temperature phase transitions.
    The Chemical Society of Japan, 英語, 研究論文(学術雑誌)
    DOI:https://doi.org/10.1246/bcsj.66.2847
    DOI ID:10.1246/bcsj.66.2847, ISSN:0009-2673, CiNii Articles ID:80007282810, ORCID:34658160, Web of Science ID:WOS:A1993ME01500010
  • CRYSTAL-STRUCTURES AND PHYSICAL-PROPERTIES OF DIMET TRIIODIDES               
    K SAITO; M ISHIBASHI; H YOSHINO; T MOCHIDUKI; H SAITOH; H ITOH; K KIKUCHI; IKEMOTO, I
    SYNTHETIC METALS, 巻:52, 号:1, 開始ページ:87, 終了ページ:100, 1992年09月, [査読有り]
    Crystals of DIMET.I3 and (DIMET)2I3 are prepared and their crystal structures determined. The crystal of DIMET.I3, consists of DIMET dimers and I3 anions. (DIMET)2I3 is isostructural with (DMET)2I3, in which the donor molecules form columns. DIMET.I3 is an insulator. The resistivity under pressure and thermoelectric power are measured for (DIMET)2I3. A metal-insulator transition is detected at about 41 K under normal pressure. Physical properties are compared with those of (DMET)2I3.
    ELSEVIER SCIENCE SA LAUSANNE, 英語, 研究論文(学術雑誌)
    ISSN:0379-6779, Web of Science ID:WOS:A1992JX38300008
■ MISC
  • 15p-J-9 p-ポリフェニルとそのフッ素置換体の構造相転移現象               
    齋藤 一弥; 山村 泰久; 齋藤 英樹; 松山 春夫; 菊地 耕一; 池本 勲
    日本物理学会講演概要集. 秋の分科会, 巻:1993, 号:2, 開始ページ:123, 終了ページ:123, 1993年09月20日
    一般社団法人日本物理学会, 日本語
    CiNii Articles ID:110001995378, CiNii Books ID:AN10453836
  • CONDUCTING SALTS BASED ON SOME UNSYMMETRICAL DONORS               
    K KIKUCHI; MOCHIDUKI, I; A YAMADA; H SAITOH; K SAITO; IKEMOTO, I; K MURATA
    巻:42, 号:1-2, 開始ページ:1921, 終了ページ:1924, 1991年05月
    The physical properties and crystal structures of some radical salts based on unsymmetrical donors: DMPT, EDT-TTF and MET have been investigated. (DMPT)2PF6 and (DMPT)2ReO4 show semiconducting behavior at room temperature and have a columnar structure with large dimerization of donors. Au(CN)2 and Ag(CN)2 salts of DMPT show metallic behavior down to 130 and 170 K, respectively. New phase of (EDT-TTF)2IBr2 has been found. It has a sharp metal-insulator transition at 80 K and a columnar structure with weaker interaction within a column rather than between columns. (EDT-TTF)2I2Br shows a metallic behavior down to 2 K but does not show superconductivity. Absence of superconductivity in this salt is considered to be due to disorder of the orientation of anions. I3 and ClO4 salts of MET show semiconducting behavior and PF6 salt shows a metallic behavior at room temperature.
    英語
    DOI:https://doi.org/10.1016/0379-6779(91)91982-G
    DOI ID:10.1016/0379-6779(91)91982-G, ISSN:0379-6779, Web of Science ID:WOS:A1991FV27600115
■ 講演・口頭発表等
  • 分子結晶のX線構造解析における多極子法電子密度解析               
    日本化学会第89春季年会(2009)講演予稿集, 2009年
    ポスター発表
  • ナフタレンジオール類とフェナジンで形成される共結晶中の水素結合ネットワーク               
    日本化学会第89春季年会(2009)講演予稿集, 2009年
    ポスター発表
  • ナフタレンジオール類とピラジンで形成される共結晶中の水素結合ネットワーク構造               
    日本化学会第2回関東支部大会(2008)講演予稿集, 2008年
    ポスター発表
  • Hydrogen-bonded network structures of cocrystals of some nophthalenediol with pyrazine               
    Acta Crystallogr. Sect. A, 2008年
    ポスター発表
  • trans-3,3€',5,5€'-テトラヒドロキシスチルベン水和物結晶の水素結合ネットワーク               
    日本化学会第87春季年会(2007)講演予稿集, 2007年
    ポスター発表
  • Heat Capacity of Tricyclohexylmethanol               
    2006年
    ポスター発表
  • Low-temerature Heat Capacity of Tricyclohexylmethanol               
    2006年
    ポスター発表
  • 3,6-ジフェニル-1,2,4,5-テトラジンのサーモクロミズム               
    2005年
    ポスター発表
  • X-ray Study on Structural Disorder in the Room-temperature Phase of p-Methylbenzyl Alcohol               
    2004年
    ポスター発表
■ 論文指導
  • 2009, 学士課程, 指導学生数計:1, 指導学生数(内留学生):0
  • 2010, 学士課程, 指導学生数計:1, 指導学生数(内留学生):0
  • 2011, 学士課程, 指導学生数計:1, 指導学生数(内留学生):0
  • 2012, 学士課程, 指導学生数計:1, 指導学生数(内留学生):0
  • 2013, 学士課程, 指導学生数計:3, 指導学生数(内留学生):0
  • 2014, 学士課程, 指導学生数計:2, 指導学生数(内留学生):0
  • 2015, 学士課程, 指導学生数計:1, 指導学生数(内留学生):0
  • 2017, 学士課程, 指導学生数計:2, 指導学生数(内留学生):0
  • 2018, 学士課程, 指導学生数計:2, 指導学生数(内留学生):0
  • 2019, 学士課程, 指導学生数計:2, 指導学生数(内留学生):0
  • 2020, 学士課程, 指導学生数計:3, 指導学生数(内留学生):0
  • 2021, 学士課程, 指導学生数計:2, 指導学生数(内留学生):0
  • 2022, 学士課程, 指導学生数計:3, 指導学生数(内留学生):0
  • 2023, 学士課程, 指導学生数計:3, 指導学生数(内留学生):0
  • 2009, 博士前期(専門職学位)課程, 指導学生数計:2, 指導学生数(内留学生):0
  • 2010, 博士前期(専門職学位)課程, 指導学生数計:1, 指導学生数(内留学生):0
  • 2011, 博士前期(専門職学位)課程, 指導学生数計:1, 指導学生数(内留学生):0
  • 2018, 博士前期(専門職学位)課程, 指導学生数計:1, 指導学生数(内留学生):0
  • 2019, 博士前期(専門職学位)課程, 指導学生数計:1, 指導学生数(内留学生):0
  • 2022, 博士前期(専門職学位)課程, 指導学生数計:1, 指導学生数(内留学生):0
  • 2023, 博士前期(専門職学位)課程, 指導学生数計:2, 指導学生数(内留学生):0
■ 所属学協会
  • 日本高圧力学会
  • 日本物理学会
  • 分子科学会
  • 日本熱測定学会
  • 日本結晶学会
  • 日本化学会
■ 共同研究・競争的資金等の研究課題
  • ナノ空間を利用したサーモクロミズムの機構解明               
    日本学術振興会, 科学研究費助成事業 特定領域研究, 特定領域研究, 2005年 - 2005年
    齋藤 一弥; 齋藤 英樹; 高橋 央宜; 山村 泰久, 筑波大学
    配分額(総額):1500000, 配分額(直接経費):1500000
    有機化合物のサーモクロミズムでは互変異性のように,分子内部にサーモクロミズムの起源を求めることができるのが普通である.相転移ほどに協同性は本質的で無いが,協同性無しには発現しない現象としての「分子間相互作用によるサーモクロミズム」の存在が確立すれば,ナノ空間における分子凝集機構や相互作用のプローブとしてサーモクロミズムを利用することができるようになる.本研究では,簡単な有機物の示すサーモクロミズムにおける分子間相互作用の効果を,ゼオライトの作るナノ空間を利用して解明することを計画した.3,6-ジフェニル-1,2,4,5-テトラジンについて検討を行った.溶液状態ではサーモクロミズムを示さないことを確認した.精密熱容量測定と低温結晶構造解析によりサーモクロミズムの見られる室温と液体窒素温度の間に相転移が無く,サーモクロミズムが相転移によるものでは無いことを確認した.可変可視紫外吸収スペクトルは温度低下により振動構造が顕著になったが,これサーモクロミズムの原因でないことを色度計算により確認した.吸収(および反射)ではサーモクロミズムが説明できなかったので発光スペクトルを測定し,橙色に相当する発光の強度が液体窒素温度では室温の10倍になることを見出し,サーモクロミズムの基本的原因が発光の増加によることを明らかにした.結晶特有のサーモクロミズムの原因は,結晶中のCH・N相互作用による分子配列と結晶の熱収縮によるCH・N相互作用の強まりのために,低温では分子の変形が抑制され,励起状態での内部転換が抑制されたためと考えられた.熱収縮によるCH・N相互作用の増強は分子内振動のラマンスペクトルおよび赤外吸収スペクトルの観測により確認された.振動モードの帰属や可視紫外吸収の解析には量子化学計算の結果を利用した.ゼオライトに吸着した状態ではサーモクロミズムを示さないことも上記の結論を支持する.
    課題番号:17036004
  • 含硫黄小,中員環化合物の化学               
    日本学術振興会, 科学研究費助成事業 基盤研究(B), 基盤研究(B), 1997年 - 1999年
    中山 重蔵; 永澤 明; 杉原 儀昭; 石井 昭彦; 齋藤 英樹; 熊倉 成和, 埼玉大学
    配分額(総額):12900000, 配分額(直接経費):12900000
    チイランの化学 : ビベンゾノルボルネニリデンを合成し,その硫化反応を検討した結果,反応が立体特異的に進行することを初めて明らかにした.
    チイレンの化学 : ジアダマンチルアセチレンと一塩化硫黄を反応させ,チイレン1-オキシド,1,2-ジチエット,a-オキソチオケトンなどを与えることを見いだした.
    ジチイランの化学 : テトラチオランの参加を経由するジチイランオキシドの合成法を開発した.
    テトラチオランの化学 : テトラチオランをジメチルジオキシランで酸化し,これまで幻の中間体とされていたvic-ジスルホキシドを有する分子種を初めて単離することに成功した.また,vic-ジスルホキシドがジチイランオキシドとS2Oに分解することを見いだした.
    チオフェン1-オキシド及び関連化合物の化学 : 1)嵩高い置換基を2,4-あるいは3,4-位に有するチオフェン1-オキシドの合成に成功した.2)チオフェンとPhI=NTsを反応させることにより,あるいはチオフェン1-オキシドとRNH2を反応させることにより,チオフェンの1-イミノ誘導体を合成することに成功した.
    チオフェン1,1-ジオキシド及び関連化合物の化学 : 1)母体チオフェンをジメチルジオキシランで低温で酸化かつ低温で溶媒を留去することにより,不安定中間体とされていたチオフェン1,1-ジオキシドを結晶として単離することに成功した.2)チオフェン1-オキシドとPhI=NTsの反応により,硫黄がキラル中心となったチオフェンのスルホキシイミン誘導体を合成した.
    ペンタチエパンの化学 : ペンタチエパン環の高い環反転障壁に基づく配座異性体の単離に成功し,反転の活性化パラメーターを初めて明らかにした.
    チオフェノファンの化学 : 非環式2,5-チオチエニレンのジブロモ誘導体とNa2Sを反応させ,大環状チオフェノファンを合成し,構造と物性に関する研究を行った.
    課題番号:09440213
  • 分子結晶の構造研究               
    有機結晶が示す興味深い性質に関して,X線結晶学的研究を行った(Solid State Commun., 91, 89, 1994).二重結合を含む官能基を末端にもつ長鎖化合物が示す結晶の多形現象とその重合反応性について,熱分析やX線回析を用いて研究を行った(J. Polym. Sci: Part A: Polym. Chem., 37, 3845, 1999).結晶が示す興味深い光学的性質や構造相転移に関して結晶学的及び分光学的研究を行っている。
    競争的資金
  • -               
    競争的資金
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