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Graduate School of Life Science and Systems Engineering, Kyushu Institute of Technology
Graduate School of Life Science and Systems Engineering, Kyushu Institute of Technology
Graduate School of Life Science and Systems Engineering, Kyushu Institute of Technology
Graduate School of Life Science and Systems Engineering, Kyushu Institute of Technology
抄録
A series of far-red sensitive symmetrical squaraine dyes bearing direct –COOH functionalized indole ring were synthesized, characterized and subjected to photophysical investigations. These symmetrical squaraine dyes were then subjected to investigate their interaction with bovine serum albumin (BSA) in Phosphate buffer solutions. All the squaraine dyes under investigation exhibit intense and sharp optical absorption mainly in the far-red wavelength region from 550 nm -700 nm having very high molar extinction coefficients from 1.3 × 105 dm3.mol−1.cm−1. A very small Stokes shift of 10-17 nm indicates the rigid conformational structure of squaraine chromophore. Interaction of these dyes with BSA leads to not only enhanced emission intensity but also bathochromically shifted absorption maximum due to formation of dye-BSA conjugate. These dyes bind strongly with BSA having about an order of magnitude higher binding constant as compared to the reported squaraine dyes. Amongst the symmetrical squaraine dyes investigated in this work one bearing substituents like trifluorobutyl as alkyl chain at N-position of indole ring and carboxylic acid on benzene ring at the terminal (SQ-26) exhibited highest association with the BSA having very high binding constant 8.01 × 106 M−1.
内容記述
12th International Conference on Nanomolecular Electronics (ICNME-2016), December 14-16, 2016, Kobe International Conference Center, Kobe, Japan
雑誌名
Journal of Physics: Conference Series
巻
924
号
1
ページ
012006-1 - 012006-10
発行年
2017-11
出版者
IOP Publishing
ISSN
1742-6588
1742-6596
DOI
info:doi/10.1088/1742-6596/924/1/012006
権利
IOP Publishing
This is an author-created, un-copyedited version of an article published in Journal of Physics: Conference Series. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. This article is published under a CC BY licence.
The Version of Record is available online at https://doi.org/10.1088/1742-6596/924/1/012006.
Photophysical Characterization and BSA Interaction of Direct Ring Carboxy Functionalized Symmetrical squaraine Dyes
JPCS924_012006.pdf
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