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苯并吡啶并三唑并吡啶与β-环糊精的超分子组装作为水溶液中二价阳离子的传感器。

Supramolecular assemblies of phenyl-pyridyl-triazolopyridine and β-cyclodextrin as sensor of divalent cations in aqueous solution.

机构信息

Departamento Química Orgánica y Fisicoquímica, Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Santiago, Chile.

Departamento Química Orgánica y Fisicoquímica, Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Santiago, Chile.

出版信息

Carbohydr Polym. 2015 May 5;121:295-301. doi: 10.1016/j.carbpol.2014.12.026. Epub 2014 Dec 31.

DOI:10.1016/j.carbpol.2014.12.026
PMID:25659701
Abstract

The chemosensor 3-phenyl-7-(pyrid-2-yl)-[1,2,3]triazolo[1,5-a]pyridine (PhPTP) used in combination with two different cyclodextrins, enable its solubilization and stabilization in aqueous solution. The behavior of the inclusion complex, and its binding ability in both cyclodextrins were investigated by means of absorption and fluorescence spectroscopy. The best results were obtained for PhPTP-DMβCD assembly, and its orientation in the DMβCD nano cavity was obtained by 2D-NMR. This inclusion geometry was confirmed by docking studies. The binary complex was proved as chemosensor upon the presence of different divalent cations in aqueous solutions. The PhPTP-DMβCD system, displays a high sensitivity for Fe(2+) by fluorescence quenching in neutral aqueous solution even in the presence of other metals showing high selectivity towards Fe(2+).

摘要

所使用的化学传感器 3-苯基-7-(吡啶-2-基)-[1,2,3]三唑并[1,5-a]吡啶（PhPTP）与两种不同的环糊精结合使用，能够在水溶液中实现其溶解和稳定。通过吸收和荧光光谱法研究了包络复合物的行为及其在两种环糊精中的结合能力。对于 PhPTP-DMβCD 组装体，获得了最佳结果，并且通过 2D-NMR 获得了其在 DMβCD 纳米腔中的取向。通过对接研究证实了这种包含几何形状。在水溶液中存在不同的二价阳离子时，二元配合物被证明是化学传感器。PhPTP-DMβCD 体系在中性水溶液中通过荧光猝灭对 Fe(2+)表现出高灵敏度，即使在存在其他金属的情况下，对 Fe(2+)也表现出高选择性。

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