Synthesis and electrochemistry of meso-substitutes dipyrromethene nickel (II) complexes
作者:Yemei Wang、Zhaoli Xue、Yuan Dong、Weihua Zhu
DOI:10.1016/j.poly.2015.10.020
日期:2015.12
were characterized by massspectrometry and UV–Vis absorption, 1H NMR spectroscopy and single crystal X-ray. In CH2Cl2, each compound undergoes two reversible one-electron reductions and one irreversible oxidation wave. In DMF, complexes 2a–c also undergoes two reversible one-electron reductions but with three irreversible oxidation waves were observed. The effect of substituents and solvent on redox
用Ni(OAc)2金属化二吡咯亚甲基(dipyrrin)(1a–c)可以37-47%的产率提供Ni-dipyrrole配合物(NiL 2)(2a–c)。通过质谱和UV-Vis吸收,1 H NMR光谱和单晶X射线对复合物进行表征。在CH 2 Cl 2中,每种化合物都经历两次可逆的单电子还原和一个不可逆的氧化波。在DMF中,配合物2a–c也经历了两个可逆的单电子还原,但是观察到了三个不可逆的氧化波。讨论了取代基和溶剂对氧化还原电势的影响。
Formation of Metal-Assisted Stable Double Helices in Dimers of Cyclic Bis-Tetrapyrroles that Exhibit Spring-Like Motion
作者:Takashi Hashimoto、Takuma Nishimura、Jong Min Lim、Dongho Kim、Hiromitsu Maeda
DOI:10.1002/chem.201001605
日期:——
intramolecular oxidative biaryl coupling reactions, yielded [2+4]‐type ZnII‐assisted stable twisted‐ring dimers comprising two doublehelices. These [2+4]‐type metal complexes can be optically resolved by chiral HPLC and exhibit tunable electronic and optical properties as a result of spring‐like motions. The doublehelices behave as glue to connect two macrocycles and as the screws of hinges to form thermally