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Photoinduced intramolecular electron transfer of fluorescein and violgen, carbazole

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Photoinduced intramolecular electron transfer of fluorescein and violgen, carbazole

Content Provider	Springer Nature Link
Author	Zhang, Hong Zhang, Manhua Shen, Tao
Copyright Year	1997
Abstract	A series of polyads consisting of covalently —(CH$_{2}$)$_{4}$— linked fluorescein with carbazole and violgen have been synthesized and characterized. The studies of absorption, emission spectra and fluorescence lifetime quenching indicated that the intramolecular fluorescence quenching of fluorescein by violgen is mainly a static process through the formation of non-emission complex (fluorescence quenching efficiency ϕ$_{ q }$= 0. 97, lifetime quenching efficiency ϕ$_{ET}$ = 0, quenching efficiency of formation of non-emission complex ϕ$_{c}$ = 0.97); while the quenching by carbazole is mainly a dynamic electron transfer process (ϕ$_{Q}$ = 0. 63, ϕ$_{ET}$ = 0.63, ϕ$_{c}$ = 0). In the violgen-fluorescein-carbazole triads, ϕ$_{Q}$ = 0.97, ϕ$_{ET}$ = 0.65, ϕ$_{c}$ = 0.32, which suggests that the photoinduced interaction of fluorescein-carbazole pair and that of violgen-fluorescein pair are in a competitive process, the dynamic electron transfer from carbazole to fluorecein is dominant in the process. The free energy change of the photoinduced electron transfer and the back reactions in our polyads are also estimated.
Starting Page	449
Ending Page	456
Page Count	8
File Format	PDF
ISSN	10069291
Journal	Science in China Series B: Chemistry
Volume Number	40
Issue Number	5
e-ISSN	18622771
Language	English
Publisher	Science in China Press
Publisher Date	1997-01-01
Publisher Place	Beijing
Access Restriction	Subscribed
Subject Keyword	intramolecular electron transfer fluorescein violgen carbazole Chemistry/Food Science
Content Type	Text
Resource Type	Article
Subject	Chemistry

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