Kyoto University · Engineering
Professor Masahide Terazima's research lab specializes in photophysical and photodynamic processes in solution, with a primary focus on the transient behavior of radical species generated by photochemical reactions. The lab employs advanced laser spectroscopic techniques—particularly the transient grating method—to investigate the diffusion dynamics, solvation effects, and intermolecular interactions of short-lived intermediates such as radicals and triplet states. Their work provides critical insights into the fundamental dynamics of photoinduced processes, especially in hydrogen abstraction reactions and excited-state chemistry of organic molecules and fullerenes.
Figures are computed from collected data and may differ slightly.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhotothermal investigation of the triplet state of carbon molecule (C60)Masahide Terazima, Noboru Hirota, Hisanori Shinohara, and Yahachi SaitoCite this: J. Phys. Chem. 1991, 95, 23, 9080–9085Publication Date (Print):November 1, 1991Publication History Published online1 May 2002Published inissue 1 November 1991https://pubs.acs.org/doi/10.1021/j100176a013https://doi.org/10.1021/j100176a013research-articleACS PublicationsRequest reuse permissionsArticle
Diffusion coefficients (D) of various radicals created by the photoinduced hydrogen abstraction reactions from alcohols (ethanol and 2-propanol) are investigated by using the transient grating (TG) method. In all the reaction systems, D’s of the transient radicals, as well as those of the parent molecules, can be measured simultaneously. The results clearly show slower diffusive motions of the radicals, at least of the π radicals in the hydrogen abstraction reaction systems, compared with those
A translational diffusion coefficient (Ddiff) of a transient radical created by a photochemical reaction of pyrazine in 2-propanol is measured by the transient grating technique. The rise and decay curves of the transient grating signal on the millisecond time scale are attributed to the diffusion of the pyrazinyl radical and the parent molecule (pyrazine). Ddiff of both species are determined. The measured Ddiff of the radical is four times smaller than that of pyrazine even though the molecula
Abstract This paper presents quantities, terminology, and symbols of terms related to photothermal phenomena and used in photothermal and related spectroscopies. The terms used in the literature to describe photothermal phenomena and methods are reviewed, and a glossary of terms is given. The origins of photothermal phenomena, as well as the relations among various photothermal effects, are summarized. The listed terms cover the terminology in transient grating, transient lens, photoacoustic spe
The translational diffusion of photochemically created intermediate radicals is measured by the transient grating technique. The diffusional behavior of these intermediates is different from that of stable molecules, which have already been investigated extensively. The investigation of the diffusion of these species will provide an opportunity to reveal the unique intermolecular interaction between the intermediates and matrix. This information will be valuable for understanding photochemistry
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTransient radical diffusion in photoinduced hydrogen abstraction reactions of benzophenone probed by the transient grating methodMasahide Terazima, Koichi Okamoto, and Noboru HirotaCite this: J. Phys. Chem. 1993, 97, 50, 13387–13393Publication Date (Print):December 1, 1993Publication History Published online1 May 2002Published inissue 1 December 1993https://pubs.acs.org/doi/10.1021/j100152a052https://doi.org/10.1021/j100152a052research-articleACS Publi
A transient grating method for measuring the quantum yield of triplet formation (Φisc) and lifetimes of short-lived triplet states is proposed. The method is based on a measurement of time dependence of a thermal grating signal with a nanosecond pulsed laser and a cw probe laser. The validity of the method is demonstrated by determining Φisc of a number of molecules whose Φisc are known. Advantages and limitations of this method are discussed in detail.
For revealing spectrally silent dynamics in chemical reactions, a new method, the time-dependent diffusion coefficient, is presented. Principles and typical examples of this method, in particular applications to biologically related reactions, are reviewed. The pulsed laser induced transient grating signal of the photo-decomposition reaction of caged ATP showed that the diffusion coefficient increases gradually with time reflecting the molecular size decrease by the dissociation. Hence, this rat
ADVERTISEMENT RETURN TO ISSUEPREVArticleDiffusion process of methyl red in organic solvents studied by the transient grating methodMasahide Terazima, Koichi Okamoto, and Noboru HirotaCite this: J. Phys. Chem. 1993, 97, 19, 5188–5192Publication Date (Print):May 1, 1993Publication History Published online1 May 2002Published inissue 1 May 1993https://pubs.acs.org/doi/10.1021/j100121a056https://doi.org/10.1021/j100121a056research-articleACS PublicationsRequest reuse permissionsArticle Views315Altmet
This chapter contains sections titled: Introduction Transient Grating Technique Density Grating Thermalization Processes Summary
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