Release Time:2019-03-09  Hits:

Indexed by: Journal Article

Date of Publication: 2012-05-15

Journal: TALANTA

Included Journals: PubMed、EI、SCIE

Volume: 93

Page Number: 55-61

ISSN: 0039-9140

Key Words: Optical probe; Cu2+; High sensitivity; 8-Hydroxyquinoline; Environmental samples

Abstract: A new fluorescent and calorimetric probe RCu1 with ultra-sensitivity (detection limit is 4.7 nM (3 sigma)) was developed. It is based on a rhodamine B derivative modified with a functionalized 8-hydroxyquinoline group as a copper-binding site which greatly increases the affinity for Cu2+center dot Cu2+ acts not only as a selective recognizing guest but also a hydrolytic promoter. RCu1 showed single-selectively sensing Cu2+ over other cations and much larger fluorescence enhancement (as high as over 1000-fold) than those based on Cu2+-complexation. The detection mechanism was proved by TOF-MS, FT-IR, H-1 NMR and Gaussian calculations. Based on the outstanding recognition ability of RCu1 toward Cu2+, an analytical procedure was developed for Cu2+-determination in natural water samples and soil sample. (C) 2012 Elsevier B.V. All rights reserved.