Journal
TETRAHEDRON
Volume 67, Issue 37, Pages 7106-7113Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tet.2011.06.106
Keywords
Crown ethers; Arylthiophene; Bithiophene; Imidazole; Fluorescent chemosensors; CHEQ effect; Pd2+; Cu2+; F-
Categories
Funding
- Fundacao para a Ciencia e Tecnologia (Portugal)
- FEDER through the Centro de Quimica and Centro de Fisica-Universidade do Minho
- National Program for Scientific Re-equipment [REDE/1517/RMN/2005]
- [PTDC/QUI/66250/2006 (FCOMP-01-0124-FEDER-007428]
- [SFRH/BD/36396/2007]
- [SFRH/BPD/72557/2010]
- Fundação para a Ciência e a Tecnologia [SFRH/BPD/72557/2010, PTDC/QUI/66250/2006] Funding Source: FCT
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Novel fluorescent ionophores bearing imidazo-arylthienyl or imidazo-bithienyl pi-conjugated bridges functionalized with one or two fused benzo-15-crown-5 ethers as receptor units are reported. The sensing ability of the compounds in the presence of metallic cations (Li+, Na+, K+, Ca2+, Zn2+, Cu2+, Ni2+, Pd2+, and Hg2+) and fluoride ion was studied in MeCN/DMSO solutions by absorption and emission spectroscopy. The experimental results indicate that all compounds could act as selective fluorimetric sensors for Cu2+ and Pd2+ and also for the fluoride ion, in the case of the bis-substituted crown ether derivatives. (C) 2011 Elsevier Ltd. All rights reserved.
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