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论文类型：期刊论文

发表时间：2010-04-01

发表刊物：DYES AND PIGMENTS

收录刊物：SCIE、EI

卷号：85

期号：1-2

页面范围：43-50

ISSN号：0143-7208

关键字：Squarylium dye; Aggregation; Photo-stability; Fluorescence; Bovine serum albumin; Linear relationship

摘要：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.