Tuning of fluorescence properties of aminoterpyridine fluorophores by N-substitution

Several N-alkyl and N-phenyl derivatives of 6-amino- () and 6,6'-diamino-2,2':6',2''-terpyridine () were synthesized, and their fluorescence properties were studied. A successive red-shift was observed as the number of the N-substituted groups increased. It was also shown th...

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Bibliographic Details
Published in:Organic & biomolecular chemistry 2007-01, Vol.5 (17), p.2762-2766
Main Authors: Cheon, Jin-Dong, Mutai, Toshiki, Araki, Koji
Format: Article
Language:English
Subjects:
Amination
Electrons
Fluorescent Dyes - chemistry
Molecular Structure
Nitrogen - chemistry
Organic Chemicals - chemistry
Pyridines - chemistry
Solutions
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Summary:Several N-alkyl and N-phenyl derivatives of 6-amino- () and 6,6'-diamino-2,2':6',2''-terpyridine () were synthesized, and their fluorescence properties were studied. A successive red-shift was observed as the number of the N-substituted groups increased. It was also shown that the susceptivity of the fluorophores to a solvent varied considerably according to the mode of the N-substitution. While the monoamino-tpys (tpy: 2,2':6',2''-terpyridine) suffered almost complete quenching of their fluorescence in ethanol, the fully N-alkylated diamino-tpys and retained their fluorescence. The results show that N-substitution is a useful way to tune both the radiation energy and solvent susceptivity of the fluorescence of the amino-tpys.
ISSN:1477-0520
1477-0539
DOI:10.1039/b707662b