Differentiating Phosphates by an Mg2+ Complex of the Conjugate of Calix[4]arene via the Formation of Ternary Species and Causing Changes in the Aggregation: Spectroscopy, Microscopy, and Co

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• 作者：Anita Nehra ; Deepthi S. Yarramala ; Vijaya Kumar Hinge ; Kushal Samanta ; Chebrolu Pulla Rao
• 刊名：Analytical Chemistry
• 出版年：2015
• 出版时间：September 15, 2015
• 年：2015
• 卷：87
• 期：18
• 页码：9344-9351
• 全文大小：627K
• ISSN：1520-6882

文摘

A phenylene diimine capped conjugate of 1,3-calix[4]arene (L) was synthesized and characterized, and its Mg²⁺ complex has been isolated and characterized. The chemo sensing ensemble of Mg²⁺ bound L provides distinguishable features of response toward phosphates, viz., HPO₄^{2鈥?/sup>, P₂O₇4鈥?/sup>, and AMP2鈥?/sup> (Set A) and H₂PO₄鈥?/sup>, ATP2鈥?/sup>, and ADP2鈥?/sup> (Set B). While the Set A shows the formation of ternary complex, the Set B does not exhibit any intermediate complex, but both show the release of Mg2+ and L at different equivalents. The structures of {L + Mg2+} and its phosphate bound ternary complexes have been established by computational calculations, and the corresponding results agree well with the experimental ones. The microscopy studies show an aggregation鈥揹isaggregation phenomenon in the presence of different equivalents of phosphates in both of the sets. Using the fluorescence data, an INHIBIT logic gate has been built.}