期刊
TETRAHEDRON LETTERS
卷 50, 期 46, 页码 6383-6388出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tetlet.2009.08.091
关键词
Bodipys'; Dual dyes; Amino groups; Polyethyleneglycol; Fluorescence; Sensors
资金
- CNRS
- French Embassy in India
- Bhabha Atomic Research Centre
Several Bodipy dyes were synthesized with various substituents designed to potentially interact with adventurous cations including protons. Among the different synthetic strategies, protection of the amino group by a BOC appears efficient for the substitution of the fluoro groups on the boron by Grignard reagents. Single alkylation on the amino-Bodipy compounds by a polyethyleneglycol chain bearing an alkyne end group is feasible using a biphasic strategy. Linkage of a blue dye on the alkyne fragment is promoted by palladium(0) and it provides novel dual donor-acceptor dyes. Fluorescence of the mono-alkylated amino dyes is heavily quenched but restored by protonation or interaction with Fe(II) salts. Very efficient energy transfer from the donor (energy input at 20,000 cm(-1)) to the acceptor (energy output at 15,100 cm(-1)) is quantitative and not distance dependent. (C) 2009 Elsevier Ltd. All rights reserved.
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