Laser multiphoton-gated photochromic reaction of a fulgide derivative
Laser multiphoton-gated photochromic reaction of a fulgide derivative
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DOI：
10.1021/jp0650578
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发表时间：
2007-02-15
影响因子：
3.7
通讯作者：
Yokoyama, Yasushi
中科院分区：
文献类型：
--
作者：
Ishibashi, Yukihide;Murakami, Masataka;Yokoyama, Yasushi
采用皮秒和飞秒激光光解方法研究了光致变色富酰衍生物2-[1-（2,5-二甲基-3-富酰）-2-甲基丙基-3-异丙基琥珀酸酐的环还原（开环）过程。皮秒激光辐照能显著提高反应产率。另一方面，飞秒激光照射下的环还原反应产率与稳态光照射下的几乎一致。反应谱的激发强度效应表明，连续的多光子吸收过程导致更高的激发态，开启了有效的环可逆过程。光致变色化合物如二乙烯衍生物的多光子门控反应也被证实了。从光跃迁的选择规律及其与分子结构的依赖关系等方面讨论了富勒烯与二芳烯高激发态反应谱的异同。
A cycloreversion (ring-opening) process of one of the photochromic fulgide derivatives, 2-[1-(2,5-dimethyl-3-fulyl)-2-methylpropylidenel-3-isopropylidenesuccinic anhydride, was investigated by means of picosecond and femtosecond laser photolysis methods. The drastic enhancement of the reaction yield was observed by the picosecond laser irradiation. On the other hand, the cycloreversion reaction yield under femtosecond laser exposure was almost consistent with the steady-state light irradiation. The excitation intensity effect of the reaction profiles revealed that the successive multiphoton absorption process leading to higher excited states opened the efficient cycloreversion process. The multiphoton-gated reaction for photochromic compounds as diarylethene derivatives was confirmed also for a fulgide derivative. The similarities and differences of the reaction profiles in higher excited states between fulgides and diarylethenes were discussed from the viewpoints of selection rule of optical transition and its dependence on molecular structures.