1. A new tridentate sulfur receptor as a highly sensitive and selective fluorescent sensor for Cu2+ ions.
- Author
-
She H, Song F, Xu J, Xiong X, Chen G, Fan J, Sun S, and Peng X
- Subjects
- Coordination Complexes chemistry, Fluoresceins chemical synthesis, Fluorescent Dyes chemical synthesis, Ions chemistry, Molecular Conformation, Organothiophosphorus Compounds chemical synthesis, Oxidation-Reduction, Rhodamines chemistry, Copper analysis, Fluoresceins chemistry, Fluorescent Dyes chemistry, Organothiophosphorus Compounds chemistry, Spectrometry, Fluorescence, Sulfur chemistry
- Abstract
The introduction of Lawesson's reagent into a bis-rhodamine spirolactam system afforded a new fluorescent sensor for Cu(2+) ions, SRR, which contained a new tridentate sulfur ligand. SRR showed excellent specificity for Cu(2+) ions over other cations (including Cu(+), Hg(2+), and Fe(3+)), very high sensitivity (10 nM), and a rapid response time (3 min). The detection mechanism was investigated by (1)H NMR, (13)C NMR, (31)P NMR, and ESR spectroscopy, MS, and Gaussian calculations. Coordination of a Cu(2+) ion to the tridentate sulfur ligand, which promotes ring-opening of the rhodamine groups, followed by a spontaneous reduction reaction (Cu(2+) into Cu(+)), has been proposed as the sensing mechanism., (Copyright © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.)
- Published
- 2013
- Full Text
- View/download PDF