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Papers by Masahide Terazima

Research paper thumbnail of Translational diffusion of chemically stable and reactive radicals in solution

Journal of the Chemical Society, Faraday Transactions, 1996

Research paper thumbnail of Chemically induced dynamic electron polarization measurement in the L-band microwave frequency region

The Journal of Physical Chemistry, 1991

Research paper thumbnail of Diffusion of electrically neutral radicals and anion radicals created by photochemical reactions

Journal of the Chemical Society, Faraday Transactions, 1998

... Indeed, the mobilities of the photochemically produced intermediate radical cations and anion... more ... Indeed, the mobilities of the photochemically produced intermediate radical cations and anions probed by the time of Ñight (TOF) technique have been reported by Houser and Jar-nagin,21 Freeman ... To create the neutral rad-icals, we employed hydrogen abstraction reactions. ...

Research paper thumbnail of Photo-thermalization dynamics of azulene in supercritical fluids studied by the transient grating method

Research paper thumbnail of Comments on “Diffusion of Free Radicals in Solution. TEMPO, Diphenylpicrylhydrazyl, and Nitrosodisulfonate”

The Journal of Physical Chemistry a, Jul 16, 1997

Donkers and Leaist reported the diffusion constants of some stable free radicals (D rad ) by the ... more Donkers and Leaist reported the diffusion constants of some stable free radicals (D rad ) by the Tayler dispersion (TD) method. 1 At the same time, D of carbonyl, quinones, and azaromatic compounds were measured and compared with our data determined from the transient grating (TG) method. 2-5 They found that D rad is similar to the nonradical molecules, and D of several stable (parent) molecules (D par ) in some solvents seriously differ from those determined by the TG method. Although they have stated that "Direct comparison of the two sets of results may not be entirely appropriate", the authors appear to question the slow diffusion of transient free radicals in their paper. In this comment, we point out that D of many

Research paper thumbnail of Study on the Photolysis Quantum Yield of Diphenyl Disulfide by the Transient Grating Method

Bulletin of the Chemical Society of Japan, 1997

Research paper thumbnail of Measurement of the Enhancement Factor of CIDNP in the Photolysis of Dibenzyl Ketone: Determination of the Spin Multiplicity of the Precursor

The Journal of Physical Chemistry

ABSTRACT

Research paper thumbnail of Excited State Dynamics of 9,10-Diazaphenanthrene Studied by the Time-Resolved Transient Grating Method

The Journal of Physical Chemistry, 1996

ABSTRACT The heat-releasing processes of the photoexcited states of 9,10-diazaphenanthrene (DAP) ... more ABSTRACT The heat-releasing processes of the photoexcited states of 9,10-diazaphenanthrene (DAP) in ethanol have been directly detected using the picosecond time-resolved transient grating (TG) method. From the heat-releasing rates, a surprisingly short lifetime of the lowest excited triplet state (13 ns) and a relatively long lifetime of the lowest excited singlet state (4.3 ns) are detected. By measuring the heat energy coming from the excited state of DAP together with the fluorescence quantum yield measurement, the quantum yield of the triplet formation is found to be about unity. The unique photophysical properties of DAP are also discussed.

Research paper thumbnail of Three-Dimensional High-Resolution Microspectroscopic Study of Environment-Sensitive Photosynthetic Membranes

Molecular Nano Dynamics, 2009

Page 1. 30 Three-Dimensional High-Resolution Microspectroscopic Study of Environment-Sensitive Ph... more Page 1. 30 Three-Dimensional High-Resolution Microspectroscopic Study of Environment-Sensitive Photosynthetic Membranes Shigeichi Kumazaki, Makotoh Hasegawa, MohammadGhoneim, Takahiko Yoshida, Masahide Terazima, Takashi Shiina, and Isamu Ikegami ...

Research paper thumbnail of Triplet mechanism of CIDNP in the photolysis of benzoquinones as studied by dynamic nuclear polarization

The Journal of Physical Chemistry, 1993

ABSTRACT

Research paper thumbnail of Transient radical diffusion in photoinduced hydrogen abstraction reactions of benzophenone probed by the transient grating method

The Journal of Physical Chemistry, 1993

The transient grating method is used for investigating the diffusion dynamics of the transient ra... more The transient grating method is used for investigating the diffusion dynamics of the transient radicals created by photoinduced hydrogen abstraction reactions of benzophenone (BP) in various solvents, acetone in 2-propanol, and acetoaldehyde in ethanol. The diffusion coefficients (D) of the BP kethyl radical and BP are obtained simultaneously. In acetone/2-propanol and acetoaldehyde/ethanol systems, only the signals due to intermediate radicals are observed. The D values of the transient radicals are two to three times smaller than those of BP. The measured Ds of the radicals usually show gbod agreement with the theoretically calculated values on the basis of the Stokes-Einstein (SE) relationship, whereas the SE relation underestimates D for stable parent molecules and the values are reproduced by the modified SE equation by Spernol and Wirtz. The smaller D values suggest the existence of a specific radical-molecule interaction.

Research paper thumbnail of Population lens in thermal lens spectroscopy

The Journal of Physical Chemistry, 1992

Research paper thumbnail of Proton polarization at room temperature

We have polarized protons in naphthalene doped with pentacene at higher temperature (>=77 K) a... more We have polarized protons in naphthalene doped with pentacene at higher temperature (>=77 K) and lower magnetic field (~3 kG) than those for ordinary polarized proton targets. Pentacene molecules have been excited with a laser beam. Protons in naphthalene have been polarized dynamically on the intermediate state of pentacene. We obtain about 13% polarization at liquid nitrogen temperature in about

Research paper thumbnail of Effects of local liquid structure on orientational relaxation: 2-ethylnaphthalene, neat and in solution

The Journal of Physical Chemistry, 1994

Research paper thumbnail of Ultrafast side group motions of polymers

The Journal of Physical Chemistry, 1992

Research paper thumbnail of CIDEP and CIDNP studies of the hydrogen abstraction of 9,10-anthraquinone from xanthene

Journal of the Chemical Society, Faraday Transactions, 1990

ABSTRACT

Research paper thumbnail of The Structural Dynamics and Ligand Releasing Process after the Photodissociation of Sperm Whale Carboxymyoglobin

The Journal of Physical Chemistry B, 2001

Research paper thumbnail of Dynamics of Water-Soluble Stilbene Dendrimers upon Photoisomerization

The Journal of Physical Chemistry B, 2004

Research paper thumbnail of Solvent Density Dependence of Translational Diffusion of Transient Radicals in the Medium-Density Region of Trifluoromethane and Carbon Dioxide

The Journal of Physical Chemistry B, 1997

... D. Kanda, M. Terazima, and N. Hirota*. Department of Chemistry, Graduate School of Science, K... more ... D. Kanda, M. Terazima, and N. Hirota*. Department of Chemistry, Graduate School of Science, Kyoto University, Kyoto 606-01, Japan. J. Phys. Chem. ... Strasbourg, France, 1994; Tome I, 29. (16) Kimura, Y.; Kanda, D.; Terazima, M.; Hirota, N. Ber. Bunsen-Ges. Phys. Chem. ...

Research paper thumbnail of Time-Resolved EPR and Optical Studies of Intermoiety Interactions in the Lowest Triplet State of L-Shaped Dimers of Naphthalene:  Conformation Dependence of Excitation Exchange Interaction

The Journal of Physical Chemistry A, 2000

Time-resolved EPR (TREPR), transient absorption, and phosphorescence spectra have been measured i... more Time-resolved EPR (TREPR), transient absorption, and phosphorescence spectra have been measured in solid matrixes at 77 K for the covalently linked L-shaped dimers of naphthalene, in which the in-plane long axes of the two naphthalene moieties are parallel and the in-plane short axes make an angle. The zero-field splitting (ZFS) parameters obtained by simulation of the TREPR spectra are consistent

Research paper thumbnail of Translational diffusion of chemically stable and reactive radicals in solution

Journal of the Chemical Society, Faraday Transactions, 1996

Research paper thumbnail of Chemically induced dynamic electron polarization measurement in the L-band microwave frequency region

The Journal of Physical Chemistry, 1991

Research paper thumbnail of Diffusion of electrically neutral radicals and anion radicals created by photochemical reactions

Journal of the Chemical Society, Faraday Transactions, 1998

... Indeed, the mobilities of the photochemically produced intermediate radical cations and anion... more ... Indeed, the mobilities of the photochemically produced intermediate radical cations and anions probed by the time of Ñight (TOF) technique have been reported by Houser and Jar-nagin,21 Freeman ... To create the neutral rad-icals, we employed hydrogen abstraction reactions. ...

Research paper thumbnail of Photo-thermalization dynamics of azulene in supercritical fluids studied by the transient grating method

Research paper thumbnail of Comments on “Diffusion of Free Radicals in Solution. TEMPO, Diphenylpicrylhydrazyl, and Nitrosodisulfonate”

The Journal of Physical Chemistry a, Jul 16, 1997

Donkers and Leaist reported the diffusion constants of some stable free radicals (D rad ) by the ... more Donkers and Leaist reported the diffusion constants of some stable free radicals (D rad ) by the Tayler dispersion (TD) method. 1 At the same time, D of carbonyl, quinones, and azaromatic compounds were measured and compared with our data determined from the transient grating (TG) method. 2-5 They found that D rad is similar to the nonradical molecules, and D of several stable (parent) molecules (D par ) in some solvents seriously differ from those determined by the TG method. Although they have stated that "Direct comparison of the two sets of results may not be entirely appropriate", the authors appear to question the slow diffusion of transient free radicals in their paper. In this comment, we point out that D of many

Research paper thumbnail of Study on the Photolysis Quantum Yield of Diphenyl Disulfide by the Transient Grating Method

Bulletin of the Chemical Society of Japan, 1997

Research paper thumbnail of Measurement of the Enhancement Factor of CIDNP in the Photolysis of Dibenzyl Ketone: Determination of the Spin Multiplicity of the Precursor

The Journal of Physical Chemistry

ABSTRACT

Research paper thumbnail of Excited State Dynamics of 9,10-Diazaphenanthrene Studied by the Time-Resolved Transient Grating Method

The Journal of Physical Chemistry, 1996

ABSTRACT The heat-releasing processes of the photoexcited states of 9,10-diazaphenanthrene (DAP) ... more ABSTRACT The heat-releasing processes of the photoexcited states of 9,10-diazaphenanthrene (DAP) in ethanol have been directly detected using the picosecond time-resolved transient grating (TG) method. From the heat-releasing rates, a surprisingly short lifetime of the lowest excited triplet state (13 ns) and a relatively long lifetime of the lowest excited singlet state (4.3 ns) are detected. By measuring the heat energy coming from the excited state of DAP together with the fluorescence quantum yield measurement, the quantum yield of the triplet formation is found to be about unity. The unique photophysical properties of DAP are also discussed.

Research paper thumbnail of Three-Dimensional High-Resolution Microspectroscopic Study of Environment-Sensitive Photosynthetic Membranes

Molecular Nano Dynamics, 2009

Page 1. 30 Three-Dimensional High-Resolution Microspectroscopic Study of Environment-Sensitive Ph... more Page 1. 30 Three-Dimensional High-Resolution Microspectroscopic Study of Environment-Sensitive Photosynthetic Membranes Shigeichi Kumazaki, Makotoh Hasegawa, MohammadGhoneim, Takahiko Yoshida, Masahide Terazima, Takashi Shiina, and Isamu Ikegami ...

Research paper thumbnail of Triplet mechanism of CIDNP in the photolysis of benzoquinones as studied by dynamic nuclear polarization

The Journal of Physical Chemistry, 1993

ABSTRACT

Research paper thumbnail of Transient radical diffusion in photoinduced hydrogen abstraction reactions of benzophenone probed by the transient grating method

The Journal of Physical Chemistry, 1993

The transient grating method is used for investigating the diffusion dynamics of the transient ra... more The transient grating method is used for investigating the diffusion dynamics of the transient radicals created by photoinduced hydrogen abstraction reactions of benzophenone (BP) in various solvents, acetone in 2-propanol, and acetoaldehyde in ethanol. The diffusion coefficients (D) of the BP kethyl radical and BP are obtained simultaneously. In acetone/2-propanol and acetoaldehyde/ethanol systems, only the signals due to intermediate radicals are observed. The D values of the transient radicals are two to three times smaller than those of BP. The measured Ds of the radicals usually show gbod agreement with the theoretically calculated values on the basis of the Stokes-Einstein (SE) relationship, whereas the SE relation underestimates D for stable parent molecules and the values are reproduced by the modified SE equation by Spernol and Wirtz. The smaller D values suggest the existence of a specific radical-molecule interaction.

Research paper thumbnail of Population lens in thermal lens spectroscopy

The Journal of Physical Chemistry, 1992

Research paper thumbnail of Proton polarization at room temperature

We have polarized protons in naphthalene doped with pentacene at higher temperature (>=77 K) a... more We have polarized protons in naphthalene doped with pentacene at higher temperature (>=77 K) and lower magnetic field (~3 kG) than those for ordinary polarized proton targets. Pentacene molecules have been excited with a laser beam. Protons in naphthalene have been polarized dynamically on the intermediate state of pentacene. We obtain about 13% polarization at liquid nitrogen temperature in about

Research paper thumbnail of Effects of local liquid structure on orientational relaxation: 2-ethylnaphthalene, neat and in solution

The Journal of Physical Chemistry, 1994

Research paper thumbnail of Ultrafast side group motions of polymers

The Journal of Physical Chemistry, 1992

Research paper thumbnail of CIDEP and CIDNP studies of the hydrogen abstraction of 9,10-anthraquinone from xanthene

Journal of the Chemical Society, Faraday Transactions, 1990

ABSTRACT

Research paper thumbnail of The Structural Dynamics and Ligand Releasing Process after the Photodissociation of Sperm Whale Carboxymyoglobin

The Journal of Physical Chemistry B, 2001

Research paper thumbnail of Dynamics of Water-Soluble Stilbene Dendrimers upon Photoisomerization

The Journal of Physical Chemistry B, 2004

Research paper thumbnail of Solvent Density Dependence of Translational Diffusion of Transient Radicals in the Medium-Density Region of Trifluoromethane and Carbon Dioxide

The Journal of Physical Chemistry B, 1997

... D. Kanda, M. Terazima, and N. Hirota*. Department of Chemistry, Graduate School of Science, K... more ... D. Kanda, M. Terazima, and N. Hirota*. Department of Chemistry, Graduate School of Science, Kyoto University, Kyoto 606-01, Japan. J. Phys. Chem. ... Strasbourg, France, 1994; Tome I, 29. (16) Kimura, Y.; Kanda, D.; Terazima, M.; Hirota, N. Ber. Bunsen-Ges. Phys. Chem. ...

Research paper thumbnail of Time-Resolved EPR and Optical Studies of Intermoiety Interactions in the Lowest Triplet State of L-Shaped Dimers of Naphthalene:  Conformation Dependence of Excitation Exchange Interaction

The Journal of Physical Chemistry A, 2000

Time-resolved EPR (TREPR), transient absorption, and phosphorescence spectra have been measured i... more Time-resolved EPR (TREPR), transient absorption, and phosphorescence spectra have been measured in solid matrixes at 77 K for the covalently linked L-shaped dimers of naphthalene, in which the in-plane long axes of the two naphthalene moieties are parallel and the in-plane short axes make an angle. The zero-field splitting (ZFS) parameters obtained by simulation of the TREPR spectra are consistent