水中基于噻吩的氮杂大环与磷酸盐的结合
Phosphate binding with a thiophene-based azamacrocycle in water.
作者信息
Saeed Musabbir A, Pramanik Avijit, Hossain Md Alamgir
机构信息
Department of Chemistry and Biochemistry, Jackson State University, Jackson, MS 39217.
出版信息
Inorg Chem Commun. 2012 Jul;21:32-34. doi: 10.1016/j.inoche.2012.04.003.
Abstract
Structural characterization of the phosphate complex with a thiophene-based macrocycle suggests that two dihydrogen phosphates in a dimeric form are encapsulated in the cavity via several hydrogen bonds from NH···O and CH···O interactions. In the lattice framework, the two dimers are linearly hydrogen-bonded to form a tetramer. H NMR titrations suggest that the host forms a 1:1 complex with phosphate, showing an association constant of 120 M in DO at pH = 5.5. The host guest complexation was further confirmed by ESI-MS in a gas phase.
摘要
含噻吩基大环化合物的磷酸盐配合物的结构表征表明，两个二聚形式的磷酸二氢根通过来自NH···O和CH···O相互作用的多个氢键被包裹在腔内。在晶格框架中，两个二聚体通过氢键线性连接形成四聚体。1H NMR滴定表明主体与磷酸盐形成1:1配合物，在pH = 5.5的氘代二甲亚砜中缔合常数为120 M-1。主体-客体络合在气相中通过电喷雾电离质谱（ESI-MS）得到进一步证实。
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