光致变色
光异构化
化学
光化学
二聚体
可见光谱
亚稳态
辐照
分子
光稳态
异构化
咪唑
红外线的
二芳基乙烯
偶氮苯
吸收(声学)
光电子学
光学
立体化学
材料科学
有机化学
催化作用
物理
核物理学
作者
Natsuho Moriyama,Jiro Abe
摘要
Selective bidirectional photoisomerization reactions with high conversion ratios between stable and metastable isomers by irradiation of photochromic molecules with visible light of different wavelengths have been an important issue for many years. For negative photochromic molecules known so far, metastable isomers also absorb UV or visible light in the same region as stable isomers, making it difficult to selectively achieve the reverse reaction by visible-light irradiation. We have demonstrated that the absorption bands of the stable and metastable isomers of 3-phenylperylenyl-bridged imidazole dimer are largely separated by more than 140 nm and that almost quantitative and selective bidirectional photoconversion can be achieved by 660 and 460 nm light. Furthermore, the forward reaction can be achieved completely with near-infrared light of 785 nm.
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