Research Topics
| Hideaki ShirotaSummaryAffiliation: Chiba University Country: Japan Publications
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Detail Information
Publications
Hydrogen-bonding dynamics in aqueous solutions of amides and acids: monomer, dimer, trimer, and polymerHideaki Shirota
Division of Nanoscience, Graduate School of Advanced Integration Science, Chiba University, 1 33 Yayoi, Inage Ku, Chiba 263 8522, Japan
J Phys Chem B 112:13542-51. 2008..The relaxation is assigned as a local motion of the constitutional repeat unit of polymers from comparison with monomer and oligomers...- Intermolecular/interionic vibrations of 1-methyl-3-n-octylimidazolium tetrafluoroborate ionic liquid and H2O mixturesHideaki Shirota
Department of Nanomaterial Science and Department of Chemistry, Chiba University, 1 33 Yayoi, Chiba 263 8522, Japan
J Phys Chem B 116:13765-73. 2012..On the other hand, successive addition of H(2)O in the mixture slows down the picosecond overdamped relaxation process measured in the 3-300 ps range even though the shear viscosity of the mixture decreases substantially... 
Comparison of Low-Frequency Spectra between Aromatic and Nonaromatic Cation Based Ionic Liquids Using Femtosecond Raman-Induced Kerr Effect SpectroscopyHideaki Shirota
Department of Nanomaterial Science and Department of Chemistry, Chiba University, 1 33 Yayoi, Inage Ku, Chiba 263 8522 Japan, Fax 81 43 290 3983
Chemphyschem 13:1638-48. 2012..Also, the low-frequency Kerr spectra of the nonaromatic analogues are influenced by their weaker segregation as compared to aromatic cation based ionic liquids...- Microscopic aspects in dicationic ionic liquids through the low-frequency spectra by femtosecond Raman-induced Kerr effect spectroscopyHideaki Shirota
Department of Nanomaterial Science, Graduate School of Advanced Integration Science, Chiba University, 1 33 Yayoi, Inage Ku, Chiba 263 8522, Japan
J Phys Chem B 115:10860-70. 2011.... - Intermolecular vibrations and diffusive orientational dynamics of Cs condensed ring aromatic molecular liquidsHideaki Shirota
Department of Nanomaterial Science, Graduate School of Advanced Integration Science and Department of Chemistry, Faculty of Science, Chiba University, Inage Ku, Chiba, Japan
J Phys Chem A 115:14262-75. 2011..In their picosecond diffusive orientational dynamics, the slowest relaxation time constant for both the condensed ring and singular aromatic molecular liquids can be accounted for by the simple Stokes-Einstein-Debye hydrodynamic model... - Atom substitution effects of [XF6]- in ionic liquids. 1. Experimental studyHideaki Shirota
Department of Nanomaterial Science, Graduate School of Advanced Integration Science, Chiba University, 1 33 Yayoi, Inage Ku, Chiba 263 8522, Japan
J Phys Chem B 113:9831-9. 2009.... - Intermolecular vibrational spectra of C3v CXY3 Molecular Liquids, CHCl3, CHBr3, CFBr3, and CBrCl3Hideaki Shirota
Department of Nanomaterial Science, Graduate School of Advanced Integration Science, Chiba University, 1 33 Yayoi, Chiba 263 8522, Japan
J Phys Chem A 115:8797-807. 2011..However, CBrCl(3), which is a prolate symmetric top molecular liquid, does not show the same correlation for the oblate molecular liquids... - Intermolecular interactions and dynamics of room temperature ionic liquids that have silyl- and siloxy-substituted imidazolium cationsHideaki Shirota
Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, 610 Taylor Road, Piscataway, New Jersey 08854 8087, USA
J Phys Chem B 111:4819-29. 2007..Measured ionic liquid viscosities are surprisingly low for such bulky cation substituents. DFT electronic structure calculations on the isolated ions provide additional information about the electrostatic interactions... - Intermolecular dynamics, interactions, and solvation in ionic liquidsEdward W Castner
Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, Piscataway, New Jersey 08854 8087, USA
Acc Chem Res 40:1217-27. 2007.... - Why are viscosities lower for ionic liquids with -CH2Si(CH3)3 vs -CH2C(CH3)3 substitutions on the imidazolium cations?Hideaki Shirota
Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, 610 Taylor Road, Piscataway, New Jersey 08854 8087, USA
J Phys Chem B 109:21576-85. 2005..The intermolecular dynamical spectrum provides an estimate of the strength of interactions between the ions in the RTILs, and provides a qualitative explanation for the observed reduction in viscosity for the silicon-substituted RTILs... - Ultrafast dynamics of pyrrolidinium cation ionic liquidsHideaki Shirota
Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, Piscataway, New Jersey 08854-8087, USA
J Chem Phys 122:184512. 2005..The intermolecular vibrational line shapes between 0 and 150 cm(-1) are fit to a multimode Brownian oscillator model; adequate fits required at least three modes to be included in the line shape... - Intermolecular vibrational modes and orientational dynamics of cooperative hydrogen-bonding dimer of 7-azaindole in solutionTatsuya Kato
Department of Nanomaterial Science, Graduate School of Advanced Integration Science, Chiba University, 1 33 Yayoi, Inage Ku, Chiba 263 8522, Japan
J Chem Phys 134:164504. 2011..The slow orientational relaxation time in 7-azaindole/CCl(4) is ~3.5 times that in 1-benzofuran/CCl(4) because of the nature of the dimerization of 7-azaindole... - Ultrafast dynamics in 1-butyl-3-methylimidazolium-based ionic liquids: a femtosecond Raman-induced Kerr effect spectroscopic studyHiroki Fukazawa
Department of Nanomaterial Science, Graduate School of Advanced Integration Science, Chiba University, Inage Ku, Chiba, Japan
J Phys Chem B 115:4621-31. 2011..This vibrational band can be attributed to the librational motion of anions and/or the coupling of the translational and reorientational motions... - Microscopic study of ionic liquid-H2O systems: alkyl-group dependence of 1-alkyl-3-methylimidazolium cationTakashi Masaki
Department of Nanomaterial Science, Graduate School of Advanced Integration Science, Chiba University, 1 33 Yayoi, Inage Ku, Chiba 263 8522, Japan
J Phys Chem B 114:6323-31. 2010..This evidence implies that the water aggregations localize at ionic regions and the water state does not really depend on the alkyl group of cation... - Comparison of interionic/intermolecular vibrational dynamics between ionic liquids and concentrated electrolyte solutionsTomotsumi Fujisawa
Department of Nanomaterial Science, Graduate School of Advanced Integration Science, Chiba University, 1 33 Yayoi, Inage Ku, Chiba 263 8522, Japan
J Chem Phys 131:244519. 2009..The comparison based on the first moment of the interionic/intermolecular vibrational spectrum suggests the stronger interionic/intermolecular interaction in the concentrated electrolyte solutions than the ILs... - Nuclear magnetic resonance study of the dynamics of imidazolium ionic liquids with -CH2Si(CH3)3 vs -CH2C(CH3)3 substituentsSong H Chung
Department of Chemistry and Physics, William Paterson University of New Jersey, Wayne, New Jersey 07470, USA
J Phys Chem B 111:4885-93. 2007..Analysis of the eta and D data generally show fractional Stokes-Einstein behavior D proportional to (T/eta)m. This is most prominent in the neopentylimidazolium BF(4)- IL with m approximately 0.66... - Solvation dynamics in aqueous anionic and cationic micelle solutions: sodium alkyl sulfate and alkyltrimethylammonium bromideYushi Tamoto
Department of Applied Chemistry, Graduate School of Engineering, and Department of General Systems Sciences, Graduate School of Arts and Sciences, University of Tokyo, 3-8-1 Komaba, Meguro-ku, Tokyo 153-8902, Japan
Langmuir 21:3757-64. 2005..The difference of the slower solvation time constants between sodium alkyl sulfate and alkyltrimethylammonium bromide micelle solutions arises likely from their different specific interactions...