A simple and easy-to-prepare imidazole-based probe for the selective chromo-fluorogenic Cu(II) detection in aqueous environments

A new simple and easy-to-prepare imidazole-based probe 1 was synthesized and used to detect Cu(II) cation in aqueous environments. At this respect, addition of increasing amounts of Cu(II) to water (pH=7.4-acetonitrile 90:10 v/v solutions) induced the appearance of a red-shifted absorption together...

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Bibliographic Details
Main Author: Okda, H. E. (author)
Other Authors: Sayed, S. E. (author), Raposo, M. Manuela M. (author), Martínez-Máñez, R. (author), Sancenón, F. (author)
Format: conferencePaper
Language:eng
Published: 2017
Subjects:
synthesis
Imidazole derivatives
chromogenic sensor
fluorogenic sensor
Cu(II)
seletive detection
aqueous solution
fluorescence
crown ether
thiophene
heterocyclic chemosensor
Ciências Naturais::Ciências Químicas
Online Access:https://hdl.handle.net/1822/48511
Country:Portugal
Oai:oai:repositorium.sdum.uminho.pt:1822/48511
Description
Summary:A new simple and easy-to-prepare imidazole-based probe 1 was synthesized and used to detect Cu(II) cation in aqueous environments. At this respect, addition of increasing amounts of Cu(II) to water (pH=7.4-acetonitrile 90:10 v/v solutions) induced the appearance of a red-shifted absorption together with a marked color change from colorless to deep blue. Also probe 1 is fluorescent and a marked emission quenching in the presence of Cu(II) was observed. The optical response is quite selective because, of all the cation tested, only cu(II) induced marked changes. Besides limits for the detection of Cu(II) of 0.7 and 3.2 pico Molar using UV-visible and fluorescence measurements were determined.

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