title: Complexation of triptycene-derived macrotricyclic polyether with paraquat derivatives, diquat, and a 2,7-diazapyrenium salt: guest-induced conformational changes of the host.
abstract: Complexation between a triptycene-derived macrotricyclic polyether containing two dibenzo-[30]-crown-10 cavities and different functionalized paraquat derivatives, diquat, and a 2,7-diazapyrenium salt in both solution and solid state was investigated in detail. It was found that depending on the guests with different terminal functional groups and structures, the macrotricyclic polyether could form 1:1 or 1:2 complexes with the guests in different complexation modes in solution and also in the solid state. Especially, the conformation of the macrotricyclic polyether was efficiently adjusted by the encapsulated guests, which was to some extent similar to substrate-induced fit of enzymes. Moreover, the binding and releasing of the guests in the complexes could be controlled by potassium ions.
authors: Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
authors: Ying
authors: Y
authors: Han
authors: Jing
authors: J
authors: Cao
authors: Peng-Fei
authors: PF
authors: Li
authors: Qian-Shou
authors: QS
authors: Zong
authors: Jian-Min
authors: JM
authors: Zhao
authors: Jia-Bin
authors: JB
authors: Guo
authors: Jun-Feng
authors: JF
authors: Xiang
authors: Chuan-Feng
authors: CF
authors: Chen
mesh_terms: D000873:Anthracenes / Q000737:chemistry*; D004178:Diquat / Q000737:chemistry*; D004987:Ethers / Q000737:chemistry*; D047028:Macrocyclic Compounds / Q000737:chemistry; D008958:Models, Molecular; D008968:Molecular Conformation; D010269:Paraquat / Q000737:chemistry*; D010618:Phenanthrolines / Q000737:chemistry*; D011108:Polymers / Q000737:chemistry*; D012492:Salts / Q000737:chemistry
chemical_list: C401953:2,7-diazapyrenium; D000873:Anthracenes; D004987:Ethers; D047028:Macrocyclic Compounds; D010618:Phenanthrolines; D011108:Polymers; D012492:Salts; D004178:Diquat; C520712:triptycene; D010269:Paraquat