Transient Phenomena of Reactive Intermediates by Pulse Radiolysis-Laser Flash Photolysis Combined Method

摘要

DPHT~centre dot + has strong absorption bands in visible range, while neutral DPHT absorbs in UV range. Therefore, the photoresponse system can be easily performed with selective excitation of DPHT~centre dot + isomers with a visible light even in the mixture of DPHT and DPHT~centre dot +. The six geometrical isomers DPHT~centre dot + have independent absorpiton spectra and photoisomerize to several isomers of DPHT~centre dot +. Therefore, a multi-modal photoresponse system gated by iirradiation of electron beam or 355-nm intense laser beam may be possible by controling the excitation wavelength.