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论文类型：期刊论文

发表时间：2012-05-15

发表刊物：TALANTA

收录刊物：SCIE、EI、PubMed

卷号：93

页面范围：55-61

ISSN号：0039-9140

关键字：Optical probe; Cu2+; High sensitivity; 8-Hydroxyquinoline; Environmental samples

摘要：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.