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Indexed by:期刊论文

Date of Publication:2010-04-01

Journal:DYES AND PIGMENTS

Included Journals:SCIE、EI

Volume:85

Issue:1-2

Page Number:43-50

ISSN No.:0143-7208

Key Words:Squarylium dye; Aggregation; Photo-stability; Fluorescence; Bovine serum albumin; Linear relationship

Abstract:Novel, squarylium dyes containing 1-(alkylcarbamoylmethyl)-2,3,3-trimethyl- 3H-indolium groups were synthesized and their UV/Vis and fluorescence spectra. aggregation. photo-stability and association with bovine serum albumin were studied The absorption and emission max wavelengths of the dyes in different solvents were in the range 619-653 nm Compared to a typical ethyl squarylium dye, the introduction of alkylcarbamoylmethyl groups reduced aggregation and improved molar extinction coefficient, fluorescence quantum yield and photo-stability in water. Moreover, the fluorescence intensity of the dyes increased upon the addition of BSA in pH 7.0 phosphate buffer solution An excellent linear relationship (r(2) = 0.9982) was obtained between fluorescence intensity and bovine serum albumin concentration. (C) 2009 Elsevier Ltd All rights reserved.