Syntheses, crystal structures and photoluminescences of two (4,4) topological coordination networks derived from the flexible bipyridyl ligands

摘要

Two new 2D coordination polymers, [Ag-4(mu-4,4'-bPP)(3)(1,3-bdc)(2)](n) center dot 2nH(2)O (1) and [Ag(mu-4,4'-bPP)(2)ClO4](n) (2) (4,4'-bpp = 2,2'-bis(4-pyridylmethyleneoxy)-1,1'-biphenylene; 1,3-bdc = 1,3-benzenedicarboxylate) have been synthesized using three-layer diffusion methods. Single-crystal X-ray analyses reveal that they are both extended grid networks of the (4,4) topology. In complex 1, a chain built by Ag(I) centers with T-shaped and linear geometries is further connected by the interesting ligand-unsupported Ag center dot center dot center dot Ag interactions as well as the conjugated Tu systems to form an interdigitated 2-D coordination network. The corrugated (4,4) sheets of 2 are packed in the ab planes and stacked along the c direction with the anions ClO4- occupying the gaps in the squares. (C) 2006 Elsevier B.V. All rights reserved.