Department of Chemistry and Center for Optical Materials Science and Engineering Technologies (COMSET), Clemson University, Clemson, U. S. A
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J. Mater. Chem., 2008,18, 1970-1976
03 Sep 2007,
07 Feb 2008
First published online
03 Mar 2008
A difluorovinylenearomatic etherpolymer (P1) incorporating periodic 5,5′-distyryl-2,2′-bipyridyl units as metal chelatingchromophores was prepared by a transition metal-free step-growthpolymerization. P1 displays strong ionochromic and ionoluminescent effects in response to transition metals. Although significant emission quenching is observed upon exposure to most transition metal ions, bathochromically shifted emission is observed upon addition of divalent d10 ions (Zn2+, Cd2+ and Hg2+). A selective 10-fold increase in integrated emission intensity is observed upon addition of Zn2+ to P1. The Zn2+-P1 metallopolymer acts as a ratiometric fluorescent indicator selective for fluoride anions, and the Cu2+-P1 metallopolymer exhibits a striking turn-on fluorescence response (>100-fold increase in integrated intensity) selective for cyanide and fluoride anions.
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Journal of Materials Chemistry
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