Novel photosystem involving protonation and deprotonation processes modelled on a PYP photocycle |
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Authors: | Matsuhira Takashi Tsuchihashi Kazuki Yamamoto Hitoshi Okamura Taka-aki Ueyama Norikazu |
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Institution: | Department of Macromolecular Science, Graduate School of Science, Osaka University, 1-1 Machikaneyama-cho, Toyonaka, Osaka 560-0043, Japan. |
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Abstract: | The synthesis of novel ortho-coumaric acid derivatives, with an amide group linked with an olefin moiety, which introduced photoinduced switching of the intramolecular hydrogen bonds is presented. An intramolecular OH...O=C hydrogen bond formed in a Z-phenol compound was switched to an intramolecular NH...O hydrogen bond in Z phenolate state via deprotonation. The pK(a) value of the Z-phenol derivative was lower than that of E-phenol, and a novel photocycle system involving protonation and deprotonation processes was achieved. |
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