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A Dual‐Functional “On‐Off‐On” Relay Fluorescent Probe for the Highly Sensitive Detection of Copper(II) and Phosphate Ions
Author(s) -
Wang Minmin,
Wang Chun,
Wang Miao,
Sun Tongming,
Huang Yang,
Tang Yanfeng,
Ju Jianfeng,
Shen Lujie,
Hu Yeyu,
Zhu Jinli
Publication year - 2020
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201904573
Subject(s) - chemistry , fluorescence , detection limit , phosphoric acid , stoichiometry , titration , copper , phosphate , ion , proton nmr , selectivity , inorganic chemistry , analytical chemistry (journal) , nuclear chemistry , stereochemistry , chromatography , organic chemistry , catalysis , physics , quantum mechanics
A high‐efficiency dual‐functional on‐off‐on fluorescence probe: 2′–4′‐dihydroxydiphenyl‐8‐formyl‐7‐hydroxycoumarin hydrazine ( L ) based on photoelectron transfer mechanism (PET) was designed and synthesized, and its ion recognition characteristics were fully studied by spectroscopy. As expected, probe L shows highly sensitive to Cu 2+ in EtOH‐HEPES (20 mM v/v, 80 : 20, pH =7.40) solution, and its detection limit up to 6.14 ×10 −7 M. The stoichiometric ratio of L−Cu 2+ complex was determined as 1 : 1 based on 1 H NMR titration and ESI‐MS. Meanwhile, the resulted L−Cu 2+ complex shows good selectivity for the phosphoric acid family anion (H 2 PO 4 − , HPO 4 2− and PO 4 3− ), which denote probe L the dual‐function in rapid detection of Cu 2+ and phosphate family's ions.