A highly efficient Zn2+ “turn-on” fluorescent sensor, [4′-benzo-15-crown-5]N![[double bond, length as m-dash]](http://www.rsc.org/images/entities/char_e001.gif)
CH–(2-OH–C6H4) (HL), has been synthesized. In the presence of Zn(NO3)2, HL displays high selectivity and sensitive enhancement of fluorescence intensity in water with the formation of [ZnL2]. Addition of an equimolar amount of KNO3 to [ZnL2] leads to the formation of {[KZnL2]NO3}n.
Dalton Transactions
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