Fast shuttling motions in solution have been observed by cyclic voltammetry in a CuI/II-based [2] rotaxane. In the reported system, the different coordination preferences of both copper oxidation states are exploited to promote the electrochemically-triggered gliding of the ring from a tetra to a pentacoordinated site and vice versa. The thread of this rotaxane consists of a tridentate 2,2′:6′,2′′-terpyridine
通过循环伏安法在基于Cu I / II的[2]轮烷中观察到了溶液中的快速穿梭运动。在报道的系统中,利用了两种铜氧化态的不同配位偏好,以促进环的电化学触发滑行从四到五配位,反之亦然。该轮烷的线由三齿的2,2':6',2''-吡啶吡啶螯合单元组成,该螯合单元通过其5-位直接键合到双齿1,10-菲咯啉单元的3-位。这种分布将两个配位点之间的距离减至最小,并减轻了四面体周围环境的拥堵。已经证明这两个因素极大地增加了切换过程的动力学。另外,在不同溶剂混合物中进行的电化学实验证明了溶剂对穿梭机理的影响。
Synthesis and Properties of Dinuclear Ru(II)/Os(II) Complexes Based on a Heteroditopic Phenanthroline−Terpyridine Bridging Ligand
作者:Eugenio Coronado、Pablo Gaviña、Sergio Tatay、Robert Groarke、Johannes G. Vos
DOI:10.1021/ic1004177
日期:2010.8.2
characterization of a series of mono- and dinuclear ruthenium(II) and osmium(II) polypyridyl complexesbased on the heteroditopic bridgingligand PT are reported. This ligand incorporates bidentate phen (1,10-phenanthroline) and terdentate tpy (2,2′:6′,2′′-terpyridine) units directly connected by their 3 and 5 positions, respectively. The dinuclear complexes have been synthesized via a Pd(0) catalyzed cross-coupling
Self-Assembly of a Copper(II)-Based Metallosupramolecular Hexagon
作者:Eugenio Coronado、José Ramón Galan-Mascaros、Pablo Gaviña、Carlos Martí-Gastaldo、Francisco M. Romero、Sergio Tatay
DOI:10.1021/ic8000569
日期:2008.6.1
The self-assembly of a 1:1 mixture of copper(II) ions and a rigid heteroditopic ligand L containing phen and terpy binding units gives rise in the solid state to green crystals of a hexanuclear metallamacrocycle 1. X-ray crystallography reveals that 1 consists of molecular hexagons of the grid-type family in which each metal ion is bound to two different ligands through the phen and terpy units, plus a weakly coordinated PF6- anion in a highly distorted octahedral geometry. ES-MS studies of acetonitrile solutions of L and copper(II) in a 1:1 ratio show mixtures of polynuclear complexes in which trinuclear (LCu3)-Cu-3 species are predominant.