A New Strategy of Designing New Crystal Structures Based on Topological Structure: Syntheses and Crystal Structures of Five Coordination Polymers with (4,4) Topology

Five coordination polymers 1–5 with four types of (4,4) layers have been synthesized through a new strategy of designing their crystal structures based on (4,4) topology. Compound [Co­(adc)­(bpp)­(H2O)]n (1) presents a 2-D structure with 2-fold homointerpenetration of layer A, while the 2-D compound {[Ni­(adc)­(bpp)2­(H2O)]2·bpp}n (2) presents 2-fold heterointerpenetration of layer B and layer C. Compound [Zn­(adc)­(bpp)·DMF]n (3) displays a typical 2-D → 3-D parallel interpenetrating structure of layer D. Compounds [Ni­(Cladc)­(bpp)­(H2O)]n (4) and [Co­(Cladc)­(bpp)­(H2O)]n (5) are isomorphous and display similar structures to 1. (H2adc = 4,4′-azodibenzoic acid, ClH2adc = 3,3′-dichloro-4,4′-azodibenzoic acid, bpp = 1,3-di­(4-pyridyl)­propane, DMF = N,N-dimethyl­formamide). Luminescence properties and thermal stabilities of 1–5 have been explored.