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论文类型：期刊论文

发表时间：2013-11-01

发表刊物：CHEMISTRY-AN ASIAN JOURNAL

收录刊物：SCIE、EI、PubMed、Scopus

卷号：8

期号：11

页面范围：2762-2767

ISSN号：1861-4728

关键字：copper; fluorescence; reduction; sensors; spiro compounds

摘要：The introduction of Lawessons reagent into a bis-rhodamine spirolactam system afforded a new fluorescent sensor for Cu2+ ions, SRR, which contained a new tridentate sulfur ligand. SRR showed excellent specificity for Cu2+ ions over other cations (including Cu+, Hg2+, and Fe3+), very high sensitivity (10nM), and a rapid response time (3min). The detection mechanism was investigated by (HNMR)-H-1, (CNMR)-C-13, (PNMR)-P-31, and ESR spectroscopy, MS, and Gaussian calculations. Coordination of a Cu2+ ion to the tridentate sulfur ligand, which promotes ring-opening of the rhodamine groups, followed by a spontaneous reduction reaction (Cu2+ into Cu+), has been proposed as the sensing mechanism.