A N-(2-hydroxyethyl)piperazine dangled 2,5-diphenyl-1,3,4-oxadiazole-based fluorescent sensor for selective relay
Lijun Tang1, Zhuxuan Zheng1, Yanjiang Bian1
1Department of Chemistry, Bohai University, Jinzhou, 121013, China.
Abstract:
A new 2,5-diphenyl-1,3,4-oxadiazole-based derivative (L) was synthesized and applied as a highly selective and sensitive fluorescent sensor for relay recognition of Cu2+ and S2- in water (Tris-HCl 10 mM, pH = 7.0) solution. L exhibits an excellent selectivity to Cu2+ over other examined metal ions with a prominent fluorescence 'turn-off' at 392 nm. L interacts with Cu2+ through a 1:2 binding stoichiometry with a detection limit of 4.8 × 10-7 M. The on-site formed L-2Cu2+ complex exhibits excellent selectivity to S2- with a fluorescence 'off-on' response via a Cu2+ displacement approach. Copyright © 2016 John Wiley & Sons, Ltd.
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