Optical spectroscopic studies on the complexation of stilbazolium dyes with a water soluble pillar[5]arene

Bojtár, Márton Gáspár and Szakács, Zoltán and Hessz, Dóra and Kubinyi, Miklós and Bitter, István (2015) Optical spectroscopic studies on the complexation of stilbazolium dyes with a water soluble pillar[5]arene. RSC Advances, 5 (34). pp. 26504-26508. ISSN 2046-2069

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Abstract

The host-guest interactions of a water soluble carboxylato-pillar[5]arene (WPA5) and three stilbazolium dyes (containing 9-anthryl, 1-pyrenyl and 4-dimethylaminophenyl groups) were studied by UV-Vis and fluorescence spectroscopy giving a detailed description of the spectral changes. A different spectroscopic response was observed in each case, with the most significant result of 28-fold fluorescence enhancement and intense color change in the case of 4-dimethylaminostyryl-N-methylpyridinium iodide (DAST, G3). In addition, a FID (fluorescence indicator displacement) system comprised of WPA5 and G3 was shown to detect paraquat by turn-off fluorescence in aqueous solution.

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