双齿膦参与的非均三脚架配位银化合物的合成、结构与表征

近年来，由于在发光材料及一些生物酶的模拟方面有着重要的价值，研究三脚 架有机配体与金属离子自组装形成的配合物引起了人们的极大兴趣。有许多稀土及 银的配合物被报道。从结构的角度来看，非均三脚架配体的三个支架可以有不同类 型的翻转，加上所其带基团的多样性，使其可具有较均三脚架配体更丰富多变的配 位方式，为具有新颖结构的功能材料的设计提供了新思路。

Synthesis, Structure and Characterization of an Ag Complex of a Heteroarmed Tripodal Ligand with Diphosphine Participation

Complex Ag_2(DPYBIM)(dppm)] (BF_4)_2·CH_3OH was obtained from the reaction of AgBF_4 and the hetero-armed tripodal ligand DPYBIM N,N- bis(2-pyridylmethyl)-N-(2-benzimidazolylmethyl)amine] with the participation of dppm bis(diphenylphosphino)-methane]. Single crystal X-ray diffraction analysis showed that the crystal belongs to the triclinic space group P(1-bar). The cell parameters are: M_r = 1135.17, a = 1.0619(2) nm, b = 1.4246(3) nm, c = 1.6767(3) nm, α = 91.08(3)°, β = 104.04(3)°, γ = 101.77(3)°, V =2.4027(8) nm~3, D_c = 1.569 Mg/m~3, Z = 2, F(000) = 1140, μ = 9.53 cm~(-1), R = 0.057, wR = 0.145. In the complex, one of the Ag atoms is linearly coordinated by PN from dppm and the benzimidazolyl group of the tripodal ligand, respectively, while the other is tetrahedrally coordinated by PN_3 where two of the N atoms are from the pyridine arms and one is the amino-N. Two types of intermolecular π…π interactions lead to the 1D infinite "Z"- shaped chain. The complex was characterized by elemental analysis, IR and MS. ~(31)P NMR showed characteristic AA'XX' pattern of two symmetrical multiples centered δ = 10.07.