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

Márton Bojtár; Zoltán Szakács; Dóra Hessz; Miklós Kubinyi; István Bitter

doi:10.1039/C4RA14809F

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

Márton Bojtár,^a Zoltán Szakács,^b Dóra Hessz,^c Miklós Kubinyi^bc and István Bitter*^a

* Corresponding authors

^a Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, 1521 Budapest, Hungary
E-mail: bitter@oct.bme.hu

^b Department of Physical Chemistry and Materials Science, Budapest University of Technology and Economics, 1521 Budapest, Hungary

^c Institute of Materials and Environmental Chemistry, Research Centre for Natural Sciences, Hungarian Academy of Sciences, 1519 Budapest, Hungary

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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DOI: https://doi.org/10.1039/C4RA14809F
Article type: Paper
Submitted: 18 Nov 2014
Accepted: 09 Mar 2015
First published: 10 Mar 2015
This article is Open Access

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RSC Adv., 2015,5, 26504-26508

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

M. Bojtár, Z. Szakács, D. Hessz, M. Kubinyi and I. Bitter, RSC Adv., 2015, 5, 26504 DOI: 10.1039/C4RA14809F

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

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