Foldamer-Derived Preorganized Bi- and Tri-zinc Porphyrin Tweezers for a Pentafluorobenzene-bearing Pyridine Guest： The Binding Pattern Study
Foldamer-Derived Preorganized Bi- and Tri-zinc Porphyrin Tweezers for a Pentafluorobenzene-bearing Pyridine Guest： The Binding Pattern Study作者机构：Department of Chemistry Fudan University Shanghai 200433 China ghanghai Institute of Organic Chemistry Chinese Academy of Sciences Shanghai 200032 China
出 版 物：《Chinese Journal of Chemistry》 (中国化学（英文版）)
年 卷 期：2013年第31卷第5期
页 面：582-588页
核心收录：
学科分类：080706[工学-化工过程机械] 081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 0807[工学-动力工程及工程热物理] 070303[理学-有机化学] 0703[理学-化学]
基 金：This work is financially supported by the National Natural Science Foundation of China
主 题：molecular recognition foldamer hydrogen bonding coordination porphyrin
摘 要：By introducing two and three zinc porphyrin units to one side of hydrogen bonding-induced aromatic amide foldamers, two new molecular tweezers 1 and 2 have been prepared. To explore new possible binding patterns, a leucine-based pyridine ligand 3 that bears a pentafluorophenyl group has been prepared. UV-Vis and IH NMR ex- periments reveal that 1 and 2 favorably complex one or two molecules of 3. UV-Vis titration experiments show that the apparent association constants of the complexes of the zinc porphyrin units of the two receptors and 3 are con- siderably higher than that of the complex between a simple control zinc porphyrin and 3. In the presence of excess of 3, the left zinc porphyrin unit of 1 and 2 can bind one more molecule of 3, which is, however, stabilized only by the single Zn-N coordination.
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