Abstract
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 C60 over C70.Moreover,the fullerene recognition capacity can be adequately suppressed by importing H2PO4-to competitively capture Zn(Ⅱ)along with syn-anti conformational conversion.Subsequently,the molecular tweezer regenerated to bind the fullerene by introducing the Ca2+into the system.Significantly,the association-disassociation process can be switched reversibly and repeatedly.
基金项目
National Natural Science Foundation of China(21801060)
Natural Science Foundation of Hebei Province(B2019205172)
Natural Science Foundation of Hebei Province(226Z1501G)
China Postdoctoral Science Foundation(2020TQ0087)
NETL
NSTL
万方数据