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Derivatives of poly(1-vinylimidazolium chloride) possessing chemosensor properties to cations and anions were synthesized by quaternization of poly-(1-vinylimidazole) (PVI) (Mw ~ 63000) by alkylating compounds containing anthracene fluorophore. Poly({3-[2-(anthracen-9-ylmethyl)amino]ethyl}-1-vinylimidazolium chloride) demonstrates selectivity with more than a 20 fold increase in relative fluorescence intensity I/I0 in the presence of Zn cations. Poly({3-[2-(anthracen-9-ylmethyl)(3,5-dichlorophenyl)amino]-2-oxoethyl}-1-vinylimidazolium chloride) acts as a chemosensor for AcO, changing the color of its DMSO solution from pale yellow to bright orange.

Synthesis and properties of polymer chemosensors based on 1-vinylimidazole