Intramolecular Electron Transfer of Diporphyrins Comprised of Electron-Deficient Porphyrin and Electron-Rich Porphyrin with Photocontrolled Isomerization

Autor:	Shinji Tsuchiya
Rok vydání:	1998
Předmět:	Photoisomerization Molecular electronics Free base General Chemistry Photochemistry Biochemistry Fluorescence Porphyrin Catalysis Electron transfer chemistry.chemical_compound Colloid and Surface Chemistry chemistry Intramolecular force polycyclic compounds Isomerization
Zdroj:	Journal of the American Chemical Society. 121:48-53
ISSN:	1520-5126 0002-7863
DOI:	10.1021/ja980677a
Popis:	New azobenzene-linked diporphyrin Zn complexes and free base analogues were synthesized in an attempt to develop new materials for molecular electronics. These diporphyrin Zn complexes and the corresponding diporphyrins consist of electron-deficient porphyrin Zn complex and electron-rich porphyrin Zn complex or electron-deficient porphyrin and electron-rich porphyrin. These compounds, which are a new family of diporphyrins, exhibited the photoresponsive property with a structual change in the antenna; the trans−cis photoisomerization and cis−trans thermal recovery occurred and this process was reversible. A particularly noteworthy characteristic of the diporphyrin Zn complex is that its fluorescence spectrum changes with isomerization; the fluorescence intensity of the cis-isomer produced by photoirradiation is smaller than that of the trans-isomer. This fluorescence quenching of the cis-isomer arises from the intramolecular electron transfer from electron-rich porphyrin Zn complex to electron-deficient p...
Databáze:	OpenAIRE
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