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Tunable Crystal-to-Crystal Phase Transition in a Cadmium Halide Chain Polymer
Polymers 2011, 3(3), 1458-1474; doi:10.3390/polym3031458
Article

A Molecular Antenna Coordination Polymer from Cadmium(II) and 4,4’-Bipyridine Featuring Three Distinct Polymer Strands in the Crystal

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Received: 26 July 2011; in revised form: 18 August 2011 / Accepted: 31 August 2011 / Published: 5 September 2011
(This article belongs to the Special Issue Coordination Polymers)
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Abstract: Reaction of cadmium perchlorate and the prototypical linear bridging ligand 4,4’-bipyridine (4,4’-bipy) in an ethanol/water mixture affords the one-dimensional coordination polymer, [{Cd(m-4,4’-bipy)(4,4’-bipy)2(H2O)2}(ClO4)2 × 2 4,4’-bipy × 4.5 H2O]n (1). The Cd2+ ions adopt an octahedral coordination sphere and are joined into linear chains by 4,4’-bipy via two trans coordination sites. The remaining two trans sites in the equatorial plane carry terminally monodentate-bound 4,4’-bipy ligands, resulting in a molecular antenna arrangement. The two axial sites of each Cd2+ ion are occupied by aqua ligands. Compound 1 crystallizes in the non-centrosymmetric, monoclinic space group C2 with three similar, crystallographically independent, cationic coordination polymer strands in the unit cell, which essentially differ only in the conformations of the 4,4’-bipyridyl ligands. Consistent with the similarity of the local coordination environments of the three independent Cd atoms in the structure, 113Cd MAS NMR spectroscopy reveals a single resonance line at 89 ppm.
Keywords: coordination polymer; crystal engineering; crystal structure; cadmium; 4,4’-bipyridine coordination polymer; crystal engineering; crystal structure; cadmium; 4,4’-bipyridine
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Seidel, R.W.; Goddard, R.; Zibrowius, B.; Oppel, I.M. A Molecular Antenna Coordination Polymer from Cadmium(II) and 4,4’-Bipyridine Featuring Three Distinct Polymer Strands in the Crystal. Polymers 2011, 3, 1458-1474.

AMA Style

Seidel RW, Goddard R, Zibrowius B, Oppel IM. A Molecular Antenna Coordination Polymer from Cadmium(II) and 4,4’-Bipyridine Featuring Three Distinct Polymer Strands in the Crystal. Polymers. 2011; 3(3):1458-1474.

Chicago/Turabian Style

Seidel, Rüdiger W.; Goddard, Richard; Zibrowius, Bodo; Oppel, Iris M. 2011. "A Molecular Antenna Coordination Polymer from Cadmium(II) and 4,4’-Bipyridine Featuring Three Distinct Polymer Strands in the Crystal." Polymers 3, no. 3: 1458-1474.


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