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Microwave synthesis and crystal structures of two cobalt-4,4′- bipyridine-sulfate frameworks constructed from 1-D coordination polymers linked by hydrogen bonding

Prior, Timothy J.; Yotnoi, Bunlawee; Rujiwatra, Apinpus

Authors

Bunlawee Yotnoi

Apinpus Rujiwatra



Abstract

Two extended solids displaying both one-dimensional coordination polymer and two-dimensional hydrogen-bonded structural features has been prepared under microwave-assisted hydrothermal conditions. [Co(H2O)(4)(4,4'-bipyridine)](4,4'-bipyridineH(2))center dot 2(SO4)center dot 2H(2)O (1) contains one-dimensional coordination polymer chains of composition [Co(4,4'-bipyridine)(H2O)(4)(2+)](n) that are linked into a three dimensional framework by hydrogen bonding through uncoordinated sulfate and water. Within this framework is located a twice protonated 4,4'-bipyridine molecule (C10N2H102+) which forms two short N-H center dot center dot center dot O hydrogen bonds and eight further non-classical C-H center dot center dot center dot O interactions. The close approach of guest and framework and the large number of interactions between them suggest the cation is important in templating this phase. [Co-2(4,4'-bipyridine)(2)(SO4)(2)(H2O)(6)center dot 4(H2O) (2) displays one dimensional chains of cobalt-bipyridine which are sinusoidal in nature. Two sets of these chains run parallel to the crystallographic [2 1 2] and [(2) over bar 1 (2) over bar ]directions. Two-dimensional hydrogen-bonded sheets parallel to the xz plane link these; further hydrogen bonds to uncoordinated water help to form a three-dimensional honeycomb network with the centroids of the six-membered rings aligned parallel to the a-axis. The use of microwave synthesis for framework solids of this type is described and the structures of the frameworks and the interactions responsible for their assembly are discussed. The thermal and spectroscopic behaviour of the two phases are described. (C) 2010 Elsevier Ltd. All rights reserved.

Journal Article Type Article
Publication Date Feb 1, 2011
Journal POLYHEDRON
Print ISSN 0277-5387
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 30
Issue 2
Pages 259-268
APA6 Citation Prior, T. J., Yotnoi, B., & Rujiwatra, A. (2011). Microwave synthesis and crystal structures of two cobalt-4,4′- bipyridine-sulfate frameworks constructed from 1-D coordination polymers linked by hydrogen bonding. Polyhedron, 30(2), 259-268. https://doi.org/10.1016/j.poly.2010.10.010
DOI https://doi.org/10.1016/j.poly.2010.10.010
Keywords Cobalt; Bipyridine; Sulfate; Framework; Template; Microwave
Publisher URL https://www.sciencedirect.com/science/article/pii/S0277538710005036?via%3Dihub
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