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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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Fujii K, Yasaka Y, Ueno M, Koyanagi Y, Kasuga S, Matano Y, Kimura Y. Excited-State Proton Transfer of Cyanonaphthols in Protic Ionic Liquids: Appearance of a New Fluorescent Species. J Phys Chem B 2017; 121:6042-6049. [DOI: 10.1021/acs.jpcb.7b03658] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Kaori Fujii
- Department
of Applied Chemistry, Graduate School of Science and Engineering and ‡Department of
Molecular Chemistry and Biochemistry, Faculty of Science and Engineering, Doshisha University, Kyotanabe, Kyoto 610-0321, Japan
- Department of Fundamental Sciences,
Graduate School of Science and
Technology and ∥Department of Chemistry, Faculty of Science, Niigata University, Nishi-ku,
Niigata 950-2181, Japan
| | - Yoshiro Yasaka
- Department
of Applied Chemistry, Graduate School of Science and Engineering and ‡Department of
Molecular Chemistry and Biochemistry, Faculty of Science and Engineering, Doshisha University, Kyotanabe, Kyoto 610-0321, Japan
- Department of Fundamental Sciences,
Graduate School of Science and
Technology and ∥Department of Chemistry, Faculty of Science, Niigata University, Nishi-ku,
Niigata 950-2181, Japan
| | - Masakatsu Ueno
- Department
of Applied Chemistry, Graduate School of Science and Engineering and ‡Department of
Molecular Chemistry and Biochemistry, Faculty of Science and Engineering, Doshisha University, Kyotanabe, Kyoto 610-0321, Japan
- Department of Fundamental Sciences,
Graduate School of Science and
Technology and ∥Department of Chemistry, Faculty of Science, Niigata University, Nishi-ku,
Niigata 950-2181, Japan
| | - Yoshinari Koyanagi
- Department
of Applied Chemistry, Graduate School of Science and Engineering and ‡Department of
Molecular Chemistry and Biochemistry, Faculty of Science and Engineering, Doshisha University, Kyotanabe, Kyoto 610-0321, Japan
- Department of Fundamental Sciences,
Graduate School of Science and
Technology and ∥Department of Chemistry, Faculty of Science, Niigata University, Nishi-ku,
Niigata 950-2181, Japan
| | - Sora Kasuga
- Department
of Applied Chemistry, Graduate School of Science and Engineering and ‡Department of
Molecular Chemistry and Biochemistry, Faculty of Science and Engineering, Doshisha University, Kyotanabe, Kyoto 610-0321, Japan
- Department of Fundamental Sciences,
Graduate School of Science and
Technology and ∥Department of Chemistry, Faculty of Science, Niigata University, Nishi-ku,
Niigata 950-2181, Japan
| | - Yoshihiro Matano
- Department
of Applied Chemistry, Graduate School of Science and Engineering and ‡Department of
Molecular Chemistry and Biochemistry, Faculty of Science and Engineering, Doshisha University, Kyotanabe, Kyoto 610-0321, Japan
- Department of Fundamental Sciences,
Graduate School of Science and
Technology and ∥Department of Chemistry, Faculty of Science, Niigata University, Nishi-ku,
Niigata 950-2181, Japan
| | - Yoshifumi Kimura
- Department
of Applied Chemistry, Graduate School of Science and Engineering and ‡Department of
Molecular Chemistry and Biochemistry, Faculty of Science and Engineering, Doshisha University, Kyotanabe, Kyoto 610-0321, Japan
- Department of Fundamental Sciences,
Graduate School of Science and
Technology and ∥Department of Chemistry, Faculty of Science, Niigata University, Nishi-ku,
Niigata 950-2181, Japan
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4
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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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Cox MJ, Bakker HJ. Femtosecond Study of the Deuteron-Transfer Dynamics of Naphtol Salts in Water. J Phys Chem A 2010; 114:10523-30. [DOI: 10.1021/jp105506a] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- M. J. Cox
- FOM Institute AMOLF, Science Park 104, 1098 XG Amsterdam, The Netherlands
| | - H. J. Bakker
- FOM Institute AMOLF, Science Park 104, 1098 XG Amsterdam, The Netherlands
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6
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Gulam RM, Takahashi T, Ohga Y. Dynamic solvent effects on the thermal isomerization of zinc dithizonate. Phys Chem Chem Phys 2009; 11:5170-4. [PMID: 19562150 DOI: 10.1039/b900706g] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The pressure dependence of the rate constant for the thermal isomerization of zinc dithizonate was measured at various temperatures in highly viscous solvents, i.e., glycerol triacetate and 2,4-dicyclohexyl-2-methylpentane, as well as in their chemically similar nonviscous solvents, such as methyl acetate and methylcyclohexane. In the nonviscous solvents, the reaction was slightly retarded upon external pressure suggesting the validity of the transition state theory. On the other hand, in the viscous solvents, the reaction, even at ambient pressure, was strongly retarded by an increase in external pressure suggesting the slow thermal fluctuation of the solvent molecules upon external pressure in highly viscous systems. This made it possible to observe the dynamic solvent effects on the isomerization of zinc dithizonate in viscous solvents. The viscosity dependence of the rate constants was rationalized by the two-dimensional reaction coordinate model.
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Affiliation(s)
- Rabbani M Gulam
- Department of Applied Chemistry, Oita University, Dannoharu, Japan
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