1,3-Diamido-calix[4]arene Conjugates of Amino Acids: Recognition of −COOH Side Chain Present in Amino Acids, Peptides, and Proteins by Experimental and Computational Studies
作者:Amitabha Acharya、Balaji Ramanujam、Jugun Prakash Chinta、Chebrolu P. Rao
DOI:10.1021/jo101759f
日期:2011.1.7
free −COOH moiety from the guest molecule. AFM, SEM, and DLS data exhibited spherical particles with a hundred-fold reduction in the size of the complexes when compared to the particles of the precursors. These spherical particles have been computationally modeled to possess hexameric species reminiscent of the hexameric micellar structures shown for a Ag+ complex of a calix[6]arene reported in the literature
已经合成并表征了杯[4]芳烃的下边缘1,3-二叠氮共轭物,并通过单晶XRD确定了其中一些的结构。通过在水溶液中开启荧光,已显示具有末端-COOH部分的酰胺杯-杯偶联物显示出对具有-COOH部分的客体分子(即Asp,Glu以及还原和氧化的谷胱甘肽(GSH,GSSG))的识别与乙腈和甲醇溶液相比,通过形成1:1络合物与对照分子进行比较。形成的配合物已通过质谱显示,并且配合物的结构特征是基于DFT计算得出的。观察到的通过Phe-calix共轭物识别Asp / Glu的缔合常数,即532/676 M -1,比所报道的识别缬氨酸,亮氨酸,苯丙氨酸,His和Trp组成更高(16-63中号-1)通过水溶性杯芳烃(竞技场,G。等人。四面体通讯。1999,40, 1597)。为了这种识别,客体分子应该有一个游离的-COOH部分。与前驱体的颗粒相比,AFM,SEM和DLS数据显示出球形颗粒,其配合物尺寸减小了