Issue 5, 2011

Metal and ligand binding mode dependent topologies in phthalate coordination polymers with bis(4-pyridylformyl)piperazine co-ligands

Abstract

Hydrothermal reaction of divalent metal salts, phthalic acid (H2pht), and bis(4-pyridylformyl)piperazine (bpfp) has afforded two-dimensional (2-D) and three-dimensional (3-D) dual-ligand coordination polymers. Their topologies are influenced by the coordination environment of the metal, binding mode of the pht ligands, and ligation of bpfp formyl groups. {[Co(pht)(bpfp)(H2O)2]·H2O}n (1) displays acentric (4,4) grid layers. [Cu2(pht)2(bpfp)(H2O)2]n (2) exhibits binding of bpfp formyl oxygen atoms and a simple but previously unreported 4,4-connected binodal layer structure with (4.648)2(4264) topology. [Cd2(pht)2(bpfp)(H2O)2]n (3) manifests a 3-D structure built from the bpfp pillaring of [Cd(pht)(H2O)]n layer motifs. A 4,5-connected binodal net with rare (4462)(4466) tcs topology can be invoked for 3. Employment of the bpfp ligand affords topologies very different from those seen in many other divalent metal phthalate coordination polymers, including the heretofore unrecognized uninodal 6-connected 3-D self-penetrated 510647 topology in [Co(Hpht)2(bpy)]n (bpy = 4,4′-bipyridine). Dehydration and thermal properties of 1–3 are also discussed, along with the luminescent behavior of 3.

Graphical abstract: Metal and ligand binding mode dependent topologies in phthalate coordination polymers with bis(4-pyridylformyl)piperazine co-ligands

Supplementary files

Article information

Article type
Paper
Submitted
10 Sep 2010
Accepted
15 Oct 2010
First published
12 Nov 2010

CrystEngComm, 2011,13, 1391-1399

Metal and ligand binding mode dependent topologies in phthalate coordination polymers with bis(4-pyridylformyl)piperazine co-ligands

C. Y. Wang, Z. M. Wilseck, R. M. Supkowski and R. L. LaDuca, CrystEngComm, 2011, 13, 1391 DOI: 10.1039/C0CE00632G

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