Syntheses and crystal structures of three pillared complexes based on H₂AIP and triazole-bipyridine ligands

Abstract

Three pillared polymeric complexes, {[Ni₂(AIP)₂(4,4′-bpt)(H₂O)₂]·4H₂O}_n (1), {[Co(AIP)(3,3′-bpt)]·H₂O}_n (2), and {[Ni(AIP)(3,3′-bpt)]·H₂O}_n (3) (H₂AIP = 5-aminoisophthalic, 4,4′-bpt = 1H-3,5–bis(4-pyridyl)-1,2,4-triazole and 3,3′-bpt = 1H-3,5-bis(3-pyridyl)-1,2,4-triazole), have been hydrothermally synthesized and characterized by X-ray diffraction analysis. Both 1 and 3 have 2-D (6,3) honeycomb layers, which are further interlinked by bent pillared triazole-bipyridine ligands to form a bilayer structure. The structures can be simplified to a (3,4)- and (3,5)-connected geometrical topology, respectively. Compound 2 has a Co-AIP layer structure in which the layers are pillared by 3,3′-bpt spacers to form the 3-D CsCl net.

Keywords:

• Coordination polymer
• Pillar structure
• Polycarboxylate

Notes

We gratefully acknowledge the National Nature Science Foundation of China [number 21061002], [number 21101035]; Guangxi Natural Science Foundation of China [2011GXNSFC018009], [2012GXNSFBA053017]; the Foundation of Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources [CMEMR2011-20]; and the Nature Science Foundation of Guangxi Normal University.