SULFUR-CONTAINING PYRIDYLAZULENES: SYNTHESIS AND CHROMOGENIC BEHAVIORS FOR HEAVY METAL IONS

[摘要]：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.

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