Journal
JOURNAL OF LUMINESCENCE
Volume 181, Issue -, Pages 387-392Publisher
ELSEVIER
DOI: 10.1016/j.jlumin.2016.08.037
Keywords
Zinc(II) bis(dipyrromethenate)s; Chemosensors; Amines; Fluorescence quenching; Detection limit
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Funding
- Russian Foundation for Basic Research [15-43-03081-p_center_a]
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It was proposed new highly sensitive ON-OFF fluorescent amines trace amounts (1.6x10(-6)9.3x10(-5) mol/L) sensors in organic media based on binuclear zinc(II) helicates with 2,2'-, 2,3'- and 3,3'-bis(dipyrromethene)s ([Zn2L2]). The results of fluorescence spectral studies of [Zn2L2]in binary mixtures of cyclohexane with amines (pyridine, diethylamine and trimethylamine) were presented. The influence of bis(dipyrromethene) ligands isomerism and electron-donating ability of N-containing co-solvent on the fluorescence quenching efficiency of [Zn2L2] in the presence of amines was discussed. It was determined, that the zinc(II) 3,3'-bis(dipyrromethenate) exhibits the highest fluorescence sensitivity in the amines presence in comparison with 2,3'- and 2,2'-analogs. (C) 2016 Elsevier B.V. All rights reserved.
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