A construction of compact measurement system of electroabsorption and electroemission spectra and the application to the investigation of photoinduced function of materials

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In order to investigate of the electric field effects on photochemical reaction and their relation to photoinduced function of materials, developments of measurement system of electroabsorption spectra (E-A) and electroemission spectra (E-E), with which not only specialists of photochemistry or molecular spectroscopy but also outsiders in this field can easily measure the spectra, are very important.In the present research, a compact apparatus for the measurement of the E-A and E-E spectra has been developed and manufactured by improving the E-A measurement system and E-E measurement system, which were separately constructed in our laboratory, and by a docking of these two measurement systems. The apparatus is controlled by a personal computer. Further, a software with which the E-A and E-E spectra can be easily analyzed has been also developed. Therefore, nonprofessional scientists can easily measure the spectra and analyze the data, and the magnitude of the change in electric dipole moment or molecular polarizability following excitation or emission can be easily obtained with this system.By using this system, electric field effects on photochemical reactions of intra- and intermolecular photoinduced electron transfer have been examined, especially in methylene-linked compounds of electron donor and acceptor or randomly distributed system of donor and acceptor.