title: Photo-responsive [2]catenanes: synthesis and properties.
abstract: A series of novel dithienylethene-based macrocycles containing ammonium moieties has been synthesized. They have been employed as templates to construct [2]catenanes showing their photoisomerization properties by means of a dynamic covalent chemistry approach. Their structures have been reliably confirmed by NMR, ESI-MS or MALDI-QTOF-MS, and elemental analysis, and their energy-minimized structures of open- and closed-ring isomers were investigated by the theoretical calculation. Investigation of the photochromic properties of these dithienylethene-based [2]catenanes has revealed good reversibility and excellent fatigue resistance upon irradiation with UV or visible light. Notably, formation of the [2]catenanes enhanced the photochromic properties compared with those of the corresponding macrocyclic ammonium salt, implying that the non-covalently interacting components of the [2]catenanes could affect the photoswitchable properties.
authors: Key Laboratory of Pesticide and Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan 430079, PR China. yinj@mail.ccnu.edu.cn.
authors: Ziyong
authors: Z
authors: Li
authors: Fang
authors: F
authors: Hu
authors: Guoxing
authors: G
authors: Liu
authors: Wen
authors: W
authors: Xue
authors: Xiaoqiang
authors: X
authors: Chen
authors: Sheng Hua
authors: SH
authors: Liu
authors: Jun
authors: J
authors: Yin
mesh_terms: D043863:Catenanes / Q000138:chemical synthesis* / Q000737:chemistry*; D060326:Chemistry Techniques, Synthetic; D047028:Macrocyclic Compounds / Q000737:chemistry; D008958:Models, Molecular; D008968:Molecular Conformation; D055668:Photochemical Processes
chemical_list: D043863:Catenanes; D047028:Macrocyclic Compounds