Referenced in: none

Automatically associated channels: Kv10.1

Title: Dual-channel detection of Cu(2+) and F(-) with a simple Schiff-based colorimetric and fluorescent sensor.

Authors: Yu Jeong Na, Ye Won Choi, Jin Yeong Yun, Kyung-Min Park, Pahn-Shick Chang, Cheal Kim

Journal, date & volume: Spectrochim Acta A Mol Biomol Spectrosc, 2014 Oct 24 , 136PC, 1649-1657

PubMed link: http://www.ncbi.nlm.nih.gov/pubmed/25459728

Abstract
A simple and easily synthesized colorimetric and fluorescent receptor 1, based on 4-diethylaminosalicylaldehyde moieties as a binding and signaling unit, has been synthesized and characterized. The receptor 1 has a selective colorimetric sensing ability for copper (II) ion by changing color from colorless to yellow in aqueous solution, and could be utilized to monitor Cu(II) over a wide pH range of 4-11. In addition, the detection limit (12μM) of 1 for Cu(2+) is much lower than that (30μM) recommended by WHO in drinking water, and its copper complex could be reversible simply through treatment with a proper reagent such as EDTA. Moreover, receptor 1 exhibited both a color change from colorless to yellow and fluorescence enhancement with a red shift upon addition to F(-) in DMSO. The recognition mechanism was attributed to the intermolecular proton transfer between the hydroxyl group of the receptor and the fluoride.