"Selective and sensitive fluorescent sensors for metal ions based on ma" by Zhen Chen, Cuihua Xue et al.
 

Selective and sensitive fluorescent sensors for metal ions based on manipulation of side-chain compositions of poly(p-phenyleneethynylene)s

Document Type

Article

Publication Date

11-1-2004

Abstract

The syntheses and metal-responsive properties of poly-(p- phenyleenethynylene)s with grafted new pseudo-crown-ether groups are reported. These polymers exhibit high sensitivities to alkali ions because of their collective optical properties, which are very sensitive to ion-induced conformational changes. The quenching of polymer fluorescence caused by the conformational changes is proportional to the ion concentration. The selectivity of the sensing materials toward Li+ ions is significantly enhanced by controlling the size of the binding site via manipulation of the polymer side-chain compositions. The polymers are very stable for their six-month solid-state storage at room temperature.

Publication Title

Analytical Chemistry

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