Dynamically switchable porphyrin-based molecular tweezer for on-off fullerene recognition  

作　　者：Zhimin Sun Xin-Hui Guo Yue Zhao Qing-Yu Meng Li-Juan Xing He-Lue Sun 

机构地区：[1]College of Chemistry and Materials Science,Hebei Key Laboratory of Organic Functional Molecules,Hebei Normal University,Shijiazhuang 050024,China

出　　处：《Chinese Chemical Letters》2024年第6期283-287,共5页中国化学快报（英文版）

基　　金：the financial support of the National Natural Science Foundation of China(No.21801060);Natural Science Foundation of Hebei Province(Nos.B2019205172,226Z1501G);China Postdoctoral Science Foundation(No.2020TQ0087);the support from the National Demonstration Center for Experimental Chemistry Education of Hebei Normal University。

摘　　要：Herein,a novel molecular tweezer based on 2,2'-bipyridine-bridged porphyrin subunits was constructed for efficient fullerenes recognition.The syn conformation of the molecule,which was obtained by Zn(Ⅱ)coordination,gives rise to a proper cavity to interact with fullerene guests to form a stable 1:1 complex in toluene solution.It exhibits distinct binding selectivity towards C_(60)over C_(70).Moreover,the fullerene recognition capacity can be adequately suppressed by importing H_(2)PO_(4)^(-)to competitively capture Zn(Ⅱ)along with syn-anti conformational conversion.Subsequently,the molecular tweezer regenerated to bind the fullerene by introducing the Ca^(2+)into the system.Significantly,the association-disassociation process can be switched reversibly and repeatedly.

关 键 词：Molecular tweezer Fullerene recognition Supramolecular chemistry Conformation conversion Coordination 

分 类 号：O626[理学—有机化学] O641.4[理学—化学]