Unusual Photoisomerization Behavior of 2-Stilbazole Covalently Bound to Porphyrin.
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Accession number;01A0228962
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| Title;Unusual Photoisomerization Behavior of 2-Stilbazole Covalently Bound to Porphyrin. |
| Author;
SUGIMOTO HIROSHI
(Sci. Univ. of Tokyo, Fac. of Eng.)
KURAMOTO KEIGO
(Sci. Univ. of Tokyo, Fac. of Eng.)
INOUE SHOHEI
(Sci. Univ. of Tokyo, Fac. of Eng.)
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Journal Title;Abstracts. Symposium on Biofunctional Chemistry
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Journal Code:L0836A
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ISSN:
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VOL.15th;NO.;PAGE.40-41(2000)
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| Figure&Table&Reference; |
| Pub. Country;Japan |
| Language;Japanese |
| Abstract;In the course of our recent study on the metalloporphyrin-stilbazole systems, we have synthesized a strategically designed porphyrin having covalently linked 2-stilbazole moiety in the periphery, such as 5-(2'-(2"-pyridylethenyl)phenyl)-10,15,20-triphenylporphyrin (stilbazole-porphyrin). As the results of photoisomerization studies of stilbazole-porphyrin and its zinc complex, trans-isomers of metal-free base and zinc complex of stilbazole-porphyrin did not isomerize into the corresponding cis-isomers under the irradiation of UV light, while cis-to-trans photoisomerization was observed for cis-form of stilbazole-porphyrin as well as the zinc complex. These facts are quite unexpected and interesting, since stilbazole is known to undergo the trans-to-cis isomerization upon UV irradiation, and the reversion by visible light only via the complexation of the pyridine group with metalloporphyrins. (author abst.) |
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