Analytical Sciences


Abstract − Analytical Sciences, 35(7), 745 (2019).

Simply Structured Conjugated Compounds with Cyanoacrylate or Acrylonitrile Groups for Sensing of p-Toluenethiol
Naoya ADACHI*,** and Eri SUZUKI**
*Division of Science, School of Science and Engineering, Tokyo Denki University, Hatoyama, Hiki, Saitama 350-0394, Japan
**Department of Science and Engineering, Graduate School of Science and Engineering, Tokyo Denki University, Hatoyama, Hiki, Saitama 350-0394, Japan
Simply structured conjugated compounds with cyanoacrylate (CA 14) and acrylonitrile (AN 14) terminal groups were synthesized by a Knoevenagel condensation reaction in one step and investigated for their recognition properties to p-toluenethiol by UV-vis, fluorescence spectra, and FT-IR measurements. When p-toluenethiol was added to CA 1, the FT-IR spectra revealed a cleavage of alkene caused by the addition reaction between p-toluenethiol and CA 1. An increase in p-toluenethiol concentration, a blue-shifted absorption band, and a decrease in the fluorescence intensity of CA 1 were observed because of the decrease in its effective conjugated length. Therefore, the most simply structured CA 1 was found to be the most effective and the most sensitive chemical sensor for p-toluenethiol.