Journal
TETRAHEDRON
Volume 69, Issue 1, Pages 201-206Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tet.2012.10.043
Keywords
Fluorescence; Benzothiadiazoles; Glycoconjugates; Chemosensors
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Funding
- Fundacao de Amparo a Pesquisa do Estado do Rio Grande do Sul (FAPERGS)
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq)
- Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior (CAPES)
- Instituto Nacional de Ciencia e Tecnologia em Catalise (INCT-Catalise)
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The synthesis of new fluorescent 2,1,3-benzothiadiazole-triazole-linked glycoconjugates is described by a straightforward synthetic route, using a copper(I)-catalyzed azide alkyne 1,3-dipolar cycloaddition (CuAAC). UV-visible (UV-vis) and steady-state fluorescence in solution were applied in order to characterize its photophysical behavior. The dyes present absorption in the violet region with fluorescence emission in the cyan-green region, which can be related to the methoxy derivatives due to an intramolecular charge transfer (ICT) in the excited state. The studied derivatives present potential optical application since combine large extinction coefficient for absorption, large Stokes shift and high fluorescence emission. Additionally, these dyes exhibit binding selectivity to Ni+2 among a series of cations in CH3CN solution. (C) 2012 Elsevier Ltd. All rights reserved.
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