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A novel chemosensor 1(CS1)bearing one coumarin and two carbodithioate groups was synthesized and its fluorescent sensing behavior toward metal ions was investigated.Ag~+addition to a CH_3COCH_3/H_2O(3:7,v:v)solution of CS1 gave a significantly quenched fluorescence.Other ions including Pb~(2+),Zn~(2+),Cu~(2+),Ca~(2+),Cd~(2+),Co~(2+),Mg~(2+),Mn~(2+),Hg~(2+),Ag~+,Ni~(2+)induced no or much smaller spectral changes.This constitutes an ON-OFF Ag~+-selective fluorescent chemosensor.
A novel chemosensor 1 (CS1) bearing one coumarin and two carbodithioate groups was synthesized and its fluorescent sensing behavior toward metal ions was investigated. Ag ~ + addition to a CH_3COCH_3 / H_2O (3: 7, v: v) The results showed that Pb 2+, Zn 2+, Cu 2+, Ca 2+, Cd 2+, Co 2+, Mg ~ (2 +), Mn ~ (2 +), Hg ~ (2 +), Ag ~ +, Ni ~ (2+) induced no or much smaller spectral changes.This constitutes an ON-OFF Ag ~ + -selective fluorescent chemosensor.