Imidazo-benzo-15-crown-5 ether bearing arylthienyl and bithienyl moieties as novel fluorescent chemosensors for Pd2+ and Cu2+

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+, N...

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Bibliographic Details
Main Author: Batista, Rosa Maria Ferreira (author)
Other Authors: Oliveira, Elisabete (author), Costa, Susana P. G. (author), Lodeiro, Carlos (author), Raposo, M. Manuela M. (author)
Format: article
Language:eng
Published: 2011
Subjects:
Crown ethers
Arylthiophene
Bithiophene
Imidazole
Fluorescent chemosensors
CHEQ effect
Pd2+
Cu2+
F-
Science & Technology
Online Access:http://hdl.handle.net/1822/15118
Country:Portugal
Oai:oai:repositorium.sdum.uminho.pt:1822/15118
Description
Summary: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.

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