Abstract
A triple-probe channel type chemosensor based on an <TEX>$NO_2S_2$</TEX>-macrocycle functionalized with phenyltricyanovinyl group was synthesized and its sensing characteristics were examined. The pink-red solution of L changed selectively to pale yellow upon addition of <TEX>$Hg^{2+}$</TEX>. The selective fluorometric response of L to all the tested metal ions was studied. The results showed that a large enhancement of the fluorescence of L was observed only in the case of <TEX>$Hg^{2+}$</TEX>. In addition, L showed large anodic shift (~ 0.3 V) for the addition of excess <TEX>$Hg^{2+}$</TEX>. Through above three observed results by the different techniques, we confirmed that the proposed chemosensor acts as the multiple-probe channel sensing material. The crystal structure of mercury(II) nitrate complexs of L which shows a 1-D polymer network with a formula <TEX>$[Hg_2(L)_2(NO_3)_2({\mu}-NO_3)_2]_n$</TEX> was also reported.
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