title: Hierarchical organization of spherical assembly with reversibly photocontrollable cross-links.
abstract: A ternary photocontrollable assembly was hierarchically constructed by the "orthogonal" host-guest interaction of different types of cyclodextrins toward the porphyrin and azobenzene. Spectroscopic titrations and microscopic investigations demonstrate that the inclusion complex of azobenzene modified water-soluble porphyrin (1) with phthalocyanine-grafted permethyl β-cyclodextrins (2) could be reversibly cross-linked to relatively larger nanospheres with naphthyl bridged bis(α-cyclodextrin)s (3). Moreover, the large-sized spheres (1·2·3) could be disassembled and switched to small-sized complex (1·2) upon the photoinduced isomerization of an azophenyl group.
authors: Department of Chemistry, State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, P.R. China.
authors: Zhi-Qiang
authors: ZQ
authors: Li
authors: Ying-Ming
authors: YM
authors: Zhang
authors: Hong-Zhong
authors: HZ
authors: Chen
authors: Jin
authors: J
authors: Zhao
authors: Yu
authors: Y
authors: Liu
mesh_terms: D001391:Azo Compounds / Q000138:chemical synthesis* / Q000737:chemistry; D003505:Cyclodextrins / Q000737:chemistry*; D015394:Molecular Structure; D010316:Particle Size; D055668:Photochemical Processes; D011166:Porphyrins / Q000138:chemical synthesis* / Q000737:chemistry; D013499:Surface Properties
chemical_list: D001391:Azo Compounds; D003505:Cyclodextrins; D011166:Porphyrins; C009850:azobenzene