Syntheses and spectroscopic properties of energy transfer systems based on squaraines

被引:35
作者
Jiao, GS
Loudet, A
Lee, HB
Kalinin, S
Johansson, LBÅ
Burgess, K
机构
[1] Texas A&M Univ, Dept Chem, College Stn, TX 77841 USA
[2] Umea Univ, Dept Chem Biophys Chem, S-90187 Umea, Sweden
关键词
squaraines; fluorescence; energy-transfer; C-N couplings;
D O I
10.1016/S0040-4020(03)00383-1
中图分类号
O62 [有机化学];
学科分类号
070303 ; 081704 ;
摘要
The purpose of this project was to prepare fluorescent dyes that could absorb energy at relatively short wavelengths, and fluoresce in the near-IR region. To achieve this, copper- and palladium-mediated C-N couplings were used to prepare the 'cassettes', i.e the carbazole derivative 3b and the carbazole-, phenothiazine-, and phenoazine-squaraines 4b-d. These compounds have carbazole, phenothiazine, and phenoazine donor-components that absorb around about 300-320 nm, and squaraine acceptor-parts that fluoresce in the range 650-700 nm. The efficiencies of energy transfer from the donor to the acceptor, and the overall quantum yields of the cassettes were determined. (C) 2003 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码:3109 / 3116
页数:8
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