Laser Multiphoton-Gated Photochromic Reaction of a Fulgide Derivative
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- 作者：Yukihide Ishibashi ; Masataka Murakami ; Hiroshi Miyasaka ; Seiya Kobatake ; Masahiro Irie ; Yasushi Yokoyama
- 刊名：Journal of Physical Chemistry C
- 出版年：2007
- 出版时间：February 15, 2007
- 年：2007
- 卷：111
- 期：6
- 页码：2730 - 2737
- 全文大小：183K
- 年卷期：v.111,no.6(February 15, 2007)
- ISSN：1932-7455
文摘
A cycloreversion (ring-opening) process of one of the photochromic fulgide derivatives, 2-[1-(2,5-dimethyl-3-fulyl)-2-methylpropylidene]-3-isopropylidenesuccinic anhydride, was investigated by means of picosecondand femtosecond laser photolysis methods. The drastic enhancement of the reaction yield was observed bythe picosecond laser irradiation. On the other hand, the cycloreversion reaction yield under femtosecondlaser exposure was almost consistent with the steady-state light irradiation. The excitation intensity effect ofthe reaction profiles revealed that the successive multiphoton absorption process leading to higher excitedstates opened the efficient cycloreversion process. The multiphoton-gated reaction for photochromic compoundsas diarylethene derivatives was confirmed also for a fulgide derivative. The similarities and differences ofthe reaction profiles in higher excited states between fulgides and diarylethenes were discussed from theviewpoints of selection rule of optical transition and its dependence on molecular structures.