作者:Xue-Bin Shao、Xi-Kui Jiang、Xiao-Zhong Wang、Zhan-Ting Li、Shi-Zheng Zhu
DOI:10.1016/s0040-4020(03)00702-6
日期:2003.6
interactions in complex Zn1·22 was observed by comparing the complexing behaviors between Zn1 and the appropriately designed guests. Complex Zn1·22 possesses an unique three-dimensional tri-site binding feature. For comparison, the complexing affinity of 1 toward compounds 13, 19, and 30 in chloroform-d and 35·4PF6 in acetone-d6 has also been investigated and the binding patterns in different complexes were explored
从新开发的中间体7设计并合成了新型带状卟啉受体Zn1,其中结合了两个富电子的双(对-亚苯基)-34-冠醚-10单元,用于研究分子识别的新化学。1 H NMR和UV-Vis研究表明,Zn1与中性电子缺陷的萘-1,8,4,5-四羧基二酰亚胺(NDI)衍生物13(没有观察到简单的络合化学计量),19(K a = 48(±5)M -1)和30(K a = 46(±5)M在氯仿-d中为-1,与吡啶衍生物25的结合力强,在氯仿中(K a = 1.5(±0.12)×10 3 M -1),对四阳离子化合物35 ·4PF 6(K a =丙酮-d 6中的475(±50)M -1,与化合物22的结合力非常强(K a = 6.5(±0.7)×10 5 M -1,由一个吡啶和两个NDI单元组成,呈氯仿形式。通过比较Zn1和适当设计的客体之间的络合行为,观察到了复杂Zn1 · 22中分子间金属-配体配位和供体-受体相互作用的显着协同作用。配合物Zn1