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Cover Picture: Foldamer‐Derived Preorganized Bi‐ and Tri‐zinc Porphyrin Tweezers for a Pentafluorobenzene‐bearing Pyridine Guest: The Binding Pattern Study (Chin. J. Chem. 5/2013)
Author(s) -
Li Changzhi,
Zhao Xin,
Gao Xiang,
Wang Quanrui,
Li Zhanting
Publication year - 2013
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Reports
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.201390011
Subject(s) - chemistry , molecular tweezers , foldamer , porphyrin , supramolecular chemistry , pyridine , hydrogen bond , tweezers , ligand (biochemistry) , crystallography , zinc , stereochemistry , terpyridine , photochemistry , molecule , organic chemistry , crystal structure , metal , receptor , biochemistry
The cover picture shows the binding gradient effect of two hydrogen bonding‐driven foldamer‐dirived molecular tweezers. For a pentafluorophenyl‐appended pyridine ligand, in the cavity of the tweezer, two binding interactions, i.e. , the N‐Zn(II) coordination and zinc porphyrin‐pentafluorobenzene donor‐acceptor interactions stabilize the encapsulation of the ligand in the cavity of the tweezers. After the binding in the cavity take places, further coordination of the ligand from outside the tweezer becomes much less favorable due to the interaction occurring in the cavity, which is evidenced by the UV‐vis and 1 H and 19 F NMR experiments. More details are discussed in the article by Li et al . on page 582–588.