1
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Hamaguchi HO. Autobiography of Hiro-o Hamaguchi: Out of the Ordinary. J Phys Chem B 2024; 128:886-902. [PMID: 38298168 DOI: 10.1021/acs.jpcb.3c08381] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2024]
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2
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Nojima Y, Takaya T, Iwata K. Energy Transfer Characteristics of Lipid Bilayer Membranes of Liposomes Examined with Picosecond Time-Resolved Raman Spectroscopy. J Phys Chem B 2023; 127:6684-6693. [PMID: 37481745 DOI: 10.1021/acs.jpcb.3c02120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/25/2023]
Abstract
A number of biochemical reactions proceed inside biomembranes. Since the rate of a chemical reaction is influenced by chemical properties of the surrounding environment, it is important to examine the chemical environment inside the biomembranes. Although the energy transfer characteristics are a basic and important property of a reaction medium, experimental investigation of the thermal conducting capabilities of the biomembranes is a challenging task. We have examined the energy transfer characteristics of lipid bilayer membranes of liposomes, a good model system for the biomembrane, with picosecond time-resolved Raman spectroscopy. The cooling kinetics of the first excited singlet (S1) state of trans-stilbene solubilized within the lipid bilayer membranes is observed as a peak shift of the 1570 cm-1 Raman band of S1 trans-stilbene. The cooling rate constant of S1 trans-stilbene is obtained in six lipid bilayer membranes formed by phospholipids with different hydrocarbon chains, DSPC, DPPC, DMPC, DLPC, DOPC, and egg-PC. We estimate the thermal diffusivity of the lipid bilayer membranes with a known correlation between the cooling rate constant and the thermal diffusivity of the solvent. The thermal diffusivity estimated for the liquid-crystal-phase lipid bilayer membranes is 8.9 × 10-8 to 9.4 × 10-8 m2 s-1, while that for the gel-phase lipid bilayer membranes is 8.4 × 10-8 to 8.5 × 10-8 m2 s-1. The difference in thermal diffusivity between the two phases is explained by a one-dimensional diffusion equation of heat.
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Affiliation(s)
- Yuki Nojima
- Department of Chemistry, Faculty of Science, Gakushuin University, Toshima-ku, Tokyo 171-8588, Japan
- Department of Chemistry, Graduate School of Science and Technology, University of Tsukuba, Tsukuba, Ibaraki 305-8571, Japan
| | - Tomohisa Takaya
- Department of Chemistry, Faculty of Science, Gakushuin University, Toshima-ku, Tokyo 171-8588, Japan
- Department of Electrical and Electronic Engineering, Faculty of Engineering, Toyama Prefectural University, Imizu, Toyama 939-0398, Japan
| | - Koichi Iwata
- Department of Chemistry, Faculty of Science, Gakushuin University, Toshima-ku, Tokyo 171-8588, Japan
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Verma S, Verma A, Mondal M, Prasad NE, Srivastava J, Singh S, Verma JP, Saha S. Drastic influence of amide functionality and alkyl chain length dependent physical, thermal and structural properties of new pyridinium-amide cation based biodegradable room temperature ionic liquids. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2021.131679] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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4
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Ye M, Iwata K. Ultrafast Electron Solvation in Room Temperature Ionic Liquid Observed by Femtosecond Time-resolved Near-IR Spectroscopy. CHEM LETT 2019. [DOI: 10.1246/cl.181043] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Manping Ye
- College of Optical and Electronic Technology, China Jiliang University, Hangzhou 310018, P. R. China
- Department of Chemistry, Faculty of Science, Gakushuin University, 1-5-1 Mejiro, Toshima-ku, Tokyo 171-8588, Japan
| | - Koichi Iwata
- Department of Chemistry, Faculty of Science, Gakushuin University, 1-5-1 Mejiro, Toshima-ku, Tokyo 171-8588, Japan
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Verma A, Prasad NE, Srivastava J, Saha S. Probing the Heterogeneity of Ionic Liquids in Solution through Phenol-Water Phase Behavior. ChemistrySelect 2019. [DOI: 10.1002/slct.201803114] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Abhineet Verma
- Dept. of Chemistry; Institute of Science; Banaras Hindu University; Varanasi 221005 India
| | - Namburi Eswara Prasad
- Defence Materials and Stores Research and Development Establishment (DMSRDE); Kanpur India
| | - Jyoti Srivastava
- Defence Materials and Stores Research and Development Establishment (DMSRDE); Kanpur India
| | - Satyen Saha
- Dept. of Chemistry; Institute of Science; Banaras Hindu University; Varanasi 221005 India
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6
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Saha S, Okajima H, Homma O, Hamaguchi HO. Microscopic solvation environments in a prototype room-temperature ionic liquid as elucidated by resonance Raman spectroscopy of iodine and bromine. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2017; 176:79-82. [PMID: 28076768 DOI: 10.1016/j.saa.2016.12.015] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2016] [Revised: 12/05/2016] [Accepted: 12/13/2016] [Indexed: 06/06/2023]
Abstract
Microscopic solvation environments in a prototype ionic liquid, bmimTf2N; 1-butyl-3-methyl-imidazolium-bis(trifluoromethanesulfonyl)imide, have been studied with the use of halides, X2 and Xn- (X=I, Br; n=3,5), as molecular probes. Resonance Raman spectroscopy has been used to detect these halogen species existing in bmimTf2N as well as in reference solvents including heptane, cyclohexane, KX/H2O and benzene. In heptane and cyclohexane, only free X2 species are detected. In KX/H2O, only Xn- and, in benzene, only benzene-X2 complexes are detected. On the contrary, free X2 and Xn- are concomitantly detected in bmimTf2N, indicating that there are two distinct solvation environments in bmimTf2N, non-polar environments that solvate free X2 and polar environments that stabilize Xn-. These two distinct solvation environments are most likely to arise from microscopic structural heterogeneity of ionic liquids.
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Affiliation(s)
- Satyen Saha
- Department of Chemistry, Centre for Advanced Studies, Institute of Science, Banaras Hindu University, Varanasi 221005, India
| | - Hajime Okajima
- Institute of Molecular Science, National Chiao Tung University, 1001 Ta Hsueh Road, Hsinchu 300, Taiwan
| | - Osamu Homma
- Department of Chemistry, School of Science, The University of Tokyo, Hongo 7-3-1 Bunkyo-ku, Tokyo, 113-0033, Japan
| | - Hiro-O Hamaguchi
- Institute of Molecular Science, National Chiao Tung University, 1001 Ta Hsueh Road, Hsinchu 300, Taiwan; Department of Chemistry, School of Science, The University of Tokyo, Hongo 7-3-1 Bunkyo-ku, Tokyo, 113-0033, Japan.
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Yoshida T, Kawai A, Khara DC, Samanta A. Temporal Behavior of the Singlet Molecular Oxygen Emission in Imidazolium and Morpholinium Ionic Liquids and Its Implications. J Phys Chem B 2015; 119:6696-702. [DOI: 10.1021/acs.jpcb.5b01996] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Tsuyoshi Yoshida
- Department
of Chemistry, Graduate School of Science and Engineering, Tokyo Institute of Technology, 2-12-1 H89 Ohokayama, Meguro-ku, Tokyo 152-8551, Japan
| | - Akio Kawai
- Department
of Chemistry, Graduate School of Science and Engineering, Tokyo Institute of Technology, 2-12-1 H89 Ohokayama, Meguro-ku, Tokyo 152-8551, Japan
| | | | - Anunay Samanta
- School of Chemistry, University of Hyderabad, Hyderabad 500 046, India
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8
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Yamaguchi T, Yonezawa T, Koda S. Study on the temperature-dependent coupling among viscosity, conductivity and structural relaxation of ionic liquids. Phys Chem Chem Phys 2015; 17:19126-33. [DOI: 10.1039/c5cp02335a] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The frequency-dependent viscosity and conductivity of three imidazolium-based ionic liquids were measured at several temperatures in the MHz region, and the results are compared with the intermediate scattering functions determined by neutron spin echo spectroscopy.
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Affiliation(s)
- Tsuyoshi Yamaguchi
- Department of Molecular Design and Engineering
- Graduate School of Engineering
- Nagoya University
- Nagoya
- Japan
| | - Takuya Yonezawa
- Department of Molecular Design and Engineering
- Graduate School of Engineering
- Nagoya University
- Nagoya
- Japan
| | - Shinobu Koda
- Department of Molecular Design and Engineering
- Graduate School of Engineering
- Nagoya University
- Nagoya
- Japan
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Tu KM, Ishizuka R, Matubayasi N. Spatial-decomposition analysis of electrical conductivity in ionic liquid. J Chem Phys 2014; 141:244507. [DOI: 10.1063/1.4904382] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Zheng ZP, Fan WH, Roy S, Mazur K, Nazet A, Buchner R, Bonn M, Hunger J. Ionic Liquids: Not only Structurally but also Dynamically Heterogeneous. Angew Chem Int Ed Engl 2014; 54:687-90. [DOI: 10.1002/anie.201409136] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2014] [Indexed: 11/06/2022]
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11
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Zheng ZP, Fan WH, Roy S, Mazur K, Nazet A, Buchner R, Bonn M, Hunger J. Ionische Flüssigkeiten: nicht nur strukturell, sondern auch dynamisch heterogen. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201409136] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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12
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Seitkalieva MM, Grachev AA, Egorova KS, Ananikov VP. Nanoscale organization of ionic liquids and their interaction with peptides probed by 13C NMR spectroscopy. Tetrahedron 2014. [DOI: 10.1016/j.tet.2014.02.025] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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13
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Suda K, Terazima M, Sato H, Kimura Y. Excitation Wavelength Dependence of Excited State Intramolecular Proton Transfer Reaction of 4′-N,N-Diethylamino-3-hydroxyflavone in Room Temperature Ionic Liquids Studied by Optical Kerr Gate Fluorescence Measurement. J Phys Chem B 2013; 117:12567-82. [DOI: 10.1021/jp405537c] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Kayo Suda
- Department
of Chemistry, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan
| | - Masahide Terazima
- Department
of Chemistry, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan
| | - Hirofumi Sato
- Department
of Molecular Engineering, Graduate School of Engineering, Kyoto University, Kyoto
Daigaku Katsura, Kyoto, 615-8510, Japan
| | - Yoshifumi Kimura
- Department
of Molecular Chemistry and Bioscience, Faculty
of Science and Engineering, Doshisha University, Kyoto 610-0321, Japan
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14
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Murakami Y, Kikuchi H, Kawai A. Kinetics of Photon Upconversion in Ionic Liquids: Energy Transfer between Sensitizer and Emitter Molecules. J Phys Chem B 2013; 117:2487-94. [DOI: 10.1021/jp3124082] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Yoichi Murakami
- Global Edge Institute, Tokyo Institute of Technology, 2-12-1-I1-15 Ookayama,
Meguro-ku, Tokyo 152-8550, Japan
| | - Hitomi Kikuchi
- Department of Chemistry, Graduate
School of Science and Engineering, Tokyo Institute of Technology, 2-12-1-H89 Ookayama, Meguro-ku, Tokyo 152-8551,
Japan
| | - Akio Kawai
- Department of Chemistry, Graduate
School of Science and Engineering, Tokyo Institute of Technology, 2-12-1-H89 Ookayama, Meguro-ku, Tokyo 152-8551,
Japan
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15
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Tanaka M, Yago T, Wakasa M. Local structure of ionic liquids probed by self-quenching of thiobenzophenone. Phys Chem Chem Phys 2013. [DOI: 10.1039/c2cp42766d] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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16
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Hunger J, Sonnleitner T, Liu L, Buchner R, Bonn M, Bakker HJ. Hydrogen-Bond Dynamics in a Protic Ionic Liquid: Evidence of Large-Angle Jumps. J Phys Chem Lett 2012; 3:3034-3038. [PMID: 26292245 DOI: 10.1021/jz301334j] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
We study the molecular rotation of the protic room-temperature ionic liquid ethylammonium nitrate with dielectric relaxation spectroscopy and femtosecond-infrared spectroscopy (fs-IR) of the ammonium N-H vibrations. The results suggest that the rotation of ethylammonium ion takes place via large angular jumps. Such nondiffusive reorientational dynamics is unique to strongly hydrogen-bonded liquids such as water and indicates that the intermolecular interaction is highly directional in this class of ionic liquids.
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Affiliation(s)
- Johannes Hunger
- †FOM Institute AMOLF, Science Park 104, 1098 XG Amsterdam, The Netherlands
- ‡Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
| | - Thomas Sonnleitner
- §Institut für Physikalische und Theoretische Chemie, Universität Regensburg, Universitätsstrasse 31, 93053 Regensburg, Germany
| | - Liyuan Liu
- †FOM Institute AMOLF, Science Park 104, 1098 XG Amsterdam, The Netherlands
| | - Richard Buchner
- §Institut für Physikalische und Theoretische Chemie, Universität Regensburg, Universitätsstrasse 31, 93053 Regensburg, Germany
| | - Mischa Bonn
- †FOM Institute AMOLF, Science Park 104, 1098 XG Amsterdam, The Netherlands
- ‡Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
| | - Huib J Bakker
- †FOM Institute AMOLF, Science Park 104, 1098 XG Amsterdam, The Netherlands
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Patra S, Samanta A. Microheterogeneity of Some Imidazolium Ionic Liquids As Revealed by Fluorescence Correlation Spectroscopy and Lifetime Studies. J Phys Chem B 2012; 116:12275-83. [DOI: 10.1021/jp3061202] [Citation(s) in RCA: 84] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Satyajit Patra
- School of Chemistry, University of Hyderabad, Hyderabad 500046, India
| | - Anunay Samanta
- School of Chemistry, University of Hyderabad, Hyderabad 500046, India
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18
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West BA, Womick JM, Moran AM. Interplay between vibrational energy transfer and excited state deactivation in DNA components. J Phys Chem A 2012; 117:5865-74. [PMID: 22920964 DOI: 10.1021/jp306799e] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Femtosecond laser spectroscopies are used to examine a thymine family of systems chosen to expose the interplay between excited state deactivation and two distinct vibrational energy transfer (VET) pathways: (i) VET from the base to the deoxyribose ring; (ii) VET between neighboring units in a dinucleotide. We find that relaxation in the ground electronic state accelerates markedly as the molecular sizes increase from the nucleobase to the dinucleotide. This behavior directly reflects growth in the density of vibrational quantum states on the substituent of the base. Excited state lifetimes are studied at temperatures ranging from 100 to 300 K to characterize the thermal fluctuations that connect the Franck-Condon geometries and the conical intersections leading back to the ground state. An Arrhenius analysis yields an approximate excited state energy barrier of 13 meV in the thymine dinucleotide. In addition, we find that the transfer of vibrational energy from the base to the substituent suppresses thermal fluctuations across this energy barrier. The possibility that the solvent viscosity imposes friction on the reaction coordinate is examined by comparing thymine and adenine systems. Experiments suggest that the solvent viscosity has little effect on barrier crossing dynamics in thymine because the conical intersection is accessed through relatively small out-of-plane atomic displacements. Overall, we conclude that the transfer of vibrational quanta from thymine to the deoxyribose ring couples significantly to the internal conversion rate, whereas the neighboring unit in the dinucleotide serves as a secondary heat bath. In natural DNA, it follows that (local) thermal fluctuations in the geometries of subunits involving the base and deoxyribose ring are most important to this subpicosecond relaxation process.
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Affiliation(s)
- Brantley A West
- Department of Physics and Astronomy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, USA
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