Adaptive Chirality of an Achiral Cage:Chirality Transfer,Induction,and Circularly Polarized Luminescence through Aqueous Host-Guest Complexation

查看全文 作　　者：Lin [1]Cheng;Kai [2]Liu;Yanjuan [1]Duan;Honghong [1]Duan;Yawen [1]Li;Meng [3,4,5]Gao;Liping [1,3,4]Cao 机构地区：[1]Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education,College of Chemistry and MaterialsScience,NorthwestUniversity,Xi’an 710069;[2]Institute of Marine Drugs,Guangxi University of Chinese Medicine,Nanning 530200;[3]State Key Laboratory of Luminescent Materials and Devices,South China University of Technology,Guangzhou 510640;[4]Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates,South China University of Technology,Guangzhou 510640;[5]The AIE Institute,Center for Aggregation-Induced Emission,National Engineering Research Center for Tissue Restoration and Reconstruction,Key Laboratory of Biomedical Engineering of Guangdong Province,Key Laboratory of Biomedical Materials and Engineering of the Ministry of Education,Innovation Center for Tissue Restoration and Reconstruction,South China University of Technology,Guangzhou 510006 出　　处：《CCS Chemistry》索引2021年第3卷第11期,共15页 基　　金：supported by the National Natural Science Foundation of China(nos.21971208 and 21771145);the Fok Ying Tong Education Foundation(no.171010);the State Key Laboratory of Luminescent Materials and Devices(no.2019-skllmd-20);Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates(no.2019B030301003)from South China University of Technology。 摘　　要：Chirality transfer,induction,and circularly polarized luminescence(CPL)using supramolecular hosts,such as macrocycles and cages,have been explored for wide-ranging applicationsin chiral recognition,sensing,catalysis,and chiroptical functional materials.Herein,we report the adaptive chirality of an achiral tetraphenylethene(TPE)-basedoctacationic cage(1)inducedby bindingwith enantiopure deoxynucleotides(A,T,C,and G)throughhost-guest(H-G)complexationinwater.The hydrophobic cavity of the cage efficiently stabilizes the hydrogen-bonded dimerization of deoxynucleotides(A_(2),T_(2),C_(2),and G_(2))to form H-G complexes in 1∶2 ratios.Given the photophysical properties and dynamic rotational conformation of the TPE units of the cage,cage⊃deoxynucleotide complexes exhibited excellent chiroptical propertiesbased on chirality transfer andinduction from the chiral guest to the achiral host.For this supramolecular system,the cage showed a unique adaptive chirality of the double clockwise-typed(PP)rotational conformation of the two TPE units,which was induced by chiral guests(e.g.,A_(2),T_(2),C_(2),and G_(2))through H-G complexation in water.Furthermore,the adaptive chirality of the cage⊃deoxynucleotide complexes successfully induced CPL signals in homogeneous aqueous solutions.This study provides insights for the construction of adaptive chirality from an achiral TPE-based octacationic cage with dynamic conformational nature,and might facilitate further design of chiral functional materials for several applications,such as chiral recognition,sensing,displays,catalysis,and other chiral fluorescent supramolecular systems based on aqueous H-G complexation. 关 键 词：supramolecular chirality adaptive chirality host-guest recognition tetraphenylethene-based cationic cage circularly polarized luminescence