Unusual Ni-Ag mixed-metal, mixed-valence, and cluster-containing coordination polymers generated from nickel-macrocyclic ligand and silver ion by metal-exchange

作者：Zhang Qiang; Ma Jian Ping; Wang Ping; Shi Zhi Qiang; Dong Yu Bin^*; Huang Ru Qi

来源：Crystal Growth & Design, 2008, 8(7): 2581-2587.

DOI：10.1021/cg800293x

A new nickel-macrocyclic complex [Ni(L)] center dot CH2Cl2 (1, L = C24H22N4O3) was synthesized based on a bent oxadiazole bridging ligand terminated by tetradentate N2O2 Schiff-base units. Two novel Ni-Ag mixed-metal, mixed-valence, and cluster-containing coordination polymers, namely, [Ag2Ni(L)](ClO4)(2.5) (2) and [Ag2Ni(L)](BF4)(2.5) (3), generated from 1 and AgX (X = ClO4-, BF4-) were synthesized. During the reactions, unexpected metal-exchange and metal valence-change were observed. These two Ni-Ag coordination polymers are isostructural. They all feature a two-dimensional double-layered concavo-convex structure which is composed of a dual-bowl unit and inixed-valent (Ni2Ni2III)-Ni-II cluster node. Compounds 1-3 were fully characterized by infrared spectroscopy, elemental analysis, and single-crystal X-ray diffraction. In addition, the luminescent properties of 1-3 were investigated primarily.

• 出版日期2008-7
• 单位山东师范大学