Simple colorimetric sensors with high selectivity for acetate and chloride in aqueous solution

A series of novel colorimetric anion sensors bearing phenol O–H and hydrazone N–H groups were synthesized and their structures were confirmed by X-ray single-crystal diffraction. In DMSO/H 2O (9:1, v/v) solutions, two-arm pincer type sensors 1 and 2 could bind Cl − through the collaboration of pheno...

Full description

Saved in:
Bibliographic Details
Published in:Sensors and actuators. B, Chemical Chemical, 2009-04, Vol.137 (2), p.447-455
Main Authors: Zhang, You-Ming, Lin, Qi, Wei, Tai-Bao, Wang, Dan-Dan, Yao, Hong, Wang, Ya-Lin
Format: Article
Language:English
Subjects:
Acetate anion
Anion recognition
Chloride anion
Colorimetric sensors
Hydrazone
Phenol hydroxyl
Citations: Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:A series of novel colorimetric anion sensors bearing phenol O–H and hydrazone N–H groups were synthesized and their structures were confirmed by X-ray single-crystal diffraction. In DMSO/H 2O (9:1, v/v) solutions, two-arm pincer type sensors 1 and 2 could bind Cl − through the collaboration of phenol O–H and hydrazone N–H groups. In DMSO/H 2O (7.5:2.5, v/v) solutions, sensors 1, 2 and 4 showed colorimetric single selectivity for AcO −. When AcO − was added to their solutions, dramatic color changes from orange to magenta were observed. Yet other anions such as F −, Cl −, Br −, I −, HSO 4 − and H 2PO 4 − could not cause any color change. Comparison with compound 5 (the analogues of 1– 4, but not containing the O–H groups) indicates that the phenol O–H group plays a critical role in the anion-recognition process.
ISSN:0925-4005
1873-3077
DOI:10.1016/j.snb.2009.01.015