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Paper | Regular issue | Vol 85, No. 9, 2012, pp.2251-2258
Published online, 25th July, 2012
DOI: 10.3987/COM-12-12536
Sulfur-Containing Pyridylazulenes: Synthesis and Chromogenic Behaviors for Heavy Metal Ions

Shigeharu Wakabayashi,* Rina Yamaoka, Emi Matsumoto, Mitsue Nishiguchi, Miki Ishiura, Misaki Tsuji, and Makoto Shimizu

*Department of Clinical Nutrition, Faculty of Health Science, Suzuka University of Medical Science, Suzuka, Mie 510-0293, Japan


A facile method for the synthesis of azulene derivatives bearing 2-pyridyl group at the 1-position, and thio or methylthio group at the 2-position is described. The color and spectral changes that occur upon the addition of heavy metal ions were examined. It was found that the sulfur functional group in pyridylazulene did not effectively participate in the improvement of color selectivity for heavy metal ions, whereas the sensitivity for Hg2+ ion seemed to be slightly improved.