✦ LIBER ✦

Role of twisted intramolecular charge transfer in the fluorescence sensitivity of biological probes: Diethylaminocoumarin laser dyes

✍ Scribed by Ashis Nag; Kankan Bhattacharyya

Publisher: Elsevier Science
Year: 1990
Tongue: English
Weight: 409 KB
Volume: 169
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(90)85156-7

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✦ Synopsis

7-diethylamino coumarins exhibit large enhancement of fluorescence yield upon binding to bovine serum albumin. It is argued that the polarity-dependent twisted intramolecular charge transfer (TICT) process is responsible for the remarkable fluorescence sensitivity of these biological fluorophores to the environment. The reduction in the rate of TICT in the hydrophobic interior of albumin leads to the increase of fluorescence yield and lifetime.

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