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1
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Fujii K, Aramaki M, Kimura Y. Excited-State Proton Transfer of 5,8-Dicyano-2-naphthol in High-Temperature and High-Pressure Methanol: Effect of Solvent Polarity and Hydrogen Bonding Ability. J Phys Chem B 2018; 122:12363-12374. [DOI: 10.1021/acs.jpcb.8b09235] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Kaori Fujii
- Department of Applied Chemistry, Graduate School of Science and Engineering, Doshisha University, Kyotanabe, Kyoto 610-0321, Japan
| | - Megumi Aramaki
- Department of Molecular Chemistry and Biochemistry, Faculty of Science and Engineering, Doshisha University, Kyotanabe, Kyoto 610-0321, Japan
| | - Yoshifumi Kimura
- Department of Applied Chemistry, Graduate School of Science and Engineering, Doshisha University, Kyotanabe, Kyoto 610-0321, Japan
- Department of Molecular Chemistry and Biochemistry, Faculty of Science and Engineering, Doshisha University, Kyotanabe, Kyoto 610-0321, Japan
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2
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Osawa K, Terazima M, Kimura Y. Electron Transfer Reaction Dynamics of p-Nitroaniline in Water from Liquid to Supercritical Conditions. J Phys Chem B 2012; 116:11508-16. [DOI: 10.1021/jp305970r] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Koji Osawa
- 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
| | - Yoshifumi Kimura
- Department of Chemistry, Graduate School
of Science, Kyoto University, Kyoto 606-8502,
Japan
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3
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Kobayashi I, Terazima M, Kimura Y. Study of the excited-state proton-transfer reaction of 5-cyano-2-naphthol in sub- and supercritical water. J Phys Chem B 2012; 116:1043-52. [PMID: 22201510 DOI: 10.1021/jp2097422] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
The excited-state proton-transfer (ESPT) reaction of 5-cyano-2-naphthol (5CN2) has been investigated in sub- and supercritical water using time-resolved fluorescence measurements. Under ambient conditions, a very fast decay of the fluorescence from the excited state of normal 5CN2 (ROH*) and a simultaneous increase of the fluorescence from the excited state of the anion species (RO(-)*) were observed, as reported previously. The very high ESPT rate was evaluated as 0.12 ps(-1). With increasing temperature at a constant pressure of 39.0 MPa, the proton transfer became slow. At 615 K and 39.0 MPa, another fluorescence from a new unknown chemical species appeared, which was assigned to the contact ion pair (CIP) of RO(-)* and the hydronium ion. With decreasing pressure at 664 K, the fluorescence from RO(-)* disappeared, and the fluorescence from ROH* and CIP was observed. At the very low density of supercritical water, only the fluorescence decay of ROH* was detected. The reaction dynamics was analyzed with the help of singular value decomposition and spectral decomposition using model functions. The ESPT rate was correlated with the solvent dielectric constant and/or the hydrogen-bonding ability.
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Affiliation(s)
- I Kobayashi
- Department of Chemistry, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan
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4
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Osawa K, Hamamoto T, Fujisawa T, Terazima M, Sato H, Kimura Y. Raman Spectroscopic Study on the Solvation of p-Aminobenzonitrile in Supercritical Water and Methanol. J Phys Chem A 2009; 113:3143-54. [DOI: 10.1021/jp8111606] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- K. Osawa
- Department of Chemistry, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan, Department of Chemistry, Faculty of Science, Kyoto University, Kyoto 606-8502, Japan, and Department of Molecular Engineering, Graduate School of Engineering, Kyoto University, Kyoto 615-8510, Japan
| | - T. Hamamoto
- Department of Chemistry, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan, Department of Chemistry, Faculty of Science, Kyoto University, Kyoto 606-8502, Japan, and Department of Molecular Engineering, Graduate School of Engineering, Kyoto University, Kyoto 615-8510, Japan
| | - T. Fujisawa
- Department of Chemistry, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan, Department of Chemistry, Faculty of Science, Kyoto University, Kyoto 606-8502, Japan, and Department of Molecular Engineering, Graduate School of Engineering, Kyoto University, Kyoto 615-8510, Japan
| | - M. Terazima
- Department of Chemistry, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan, Department of Chemistry, Faculty of Science, Kyoto University, Kyoto 606-8502, Japan, and Department of Molecular Engineering, Graduate School of Engineering, Kyoto University, Kyoto 615-8510, Japan
| | - H Sato
- Department of Chemistry, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan, Department of Chemistry, Faculty of Science, Kyoto University, Kyoto 606-8502, Japan, and Department of Molecular Engineering, Graduate School of Engineering, Kyoto University, Kyoto 615-8510, Japan
| | - Y. Kimura
- Department of Chemistry, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan, Department of Chemistry, Faculty of Science, Kyoto University, Kyoto 606-8502, Japan, and Department of Molecular Engineering, Graduate School of Engineering, Kyoto University, Kyoto 615-8510, Japan
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5
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Fujisawa T, Terazima M, Kimura Y. Solvent Effects on the Local Structure of p-Nitroaniline in Supercritical Water and Supercritical Alcohols. J Phys Chem A 2008; 112:5515-26. [DOI: 10.1021/jp710530m] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Tomotsumi Fujisawa
- Department of Chemistry, Graduate School of Science, Kyoto University, Kyoto, 606-8502, Japan, and Division of Research Initiatives, International Innovation Center, Kyoto University, Kyoto, 606-8501, Japan
| | - Masahide Terazima
- Department of Chemistry, Graduate School of Science, Kyoto University, Kyoto, 606-8502, Japan, and Division of Research Initiatives, International Innovation Center, Kyoto University, Kyoto, 606-8501, Japan
| | - Yoshifumi Kimura
- Department of Chemistry, Graduate School of Science, Kyoto University, Kyoto, 606-8502, Japan, and Division of Research Initiatives, International Innovation Center, Kyoto University, Kyoto, 606-8501, Japan
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