Controlling interpenetration in CuCN coordination polymers by size of the pendant substituents of terpyridine ligands

To systematically investigate the effect of the pendant groups of ligands on the assembly of coordination polymers (e.g, controlling interpenetration), four terpyridine ligands with bulky pendant groups, namely, 4[prime or minute]-(4-tolyl)-4,2[prime or minute]:6[prime or minute],4[prime or minute][...

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Bibliographic Details
Published in:CrystEngComm 2011-01, Vol.13 (22), p.6759-6765
Main Authors: Li, Xin-Zhi, Zhou, Xiao-Ping, Li, Dan, Yin, Ye-Gao
Format: Article
Language:English
Subjects:
Alterations
Assembly
Control systems
Coordination polymers
Interpenetrating networks
Ligands
Three dimensional
X-rays
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Summary:To systematically investigate the effect of the pendant groups of ligands on the assembly of coordination polymers (e.g, controlling interpenetration), four terpyridine ligands with bulky pendant groups, namely, 4[prime or minute]-(4-tolyl)-4,2[prime or minute]:6[prime or minute],4[prime or minute][prime or minute]-terpyridine (L1), 4[prime or minute]-(4-ethylphenyl)-4,2[prime or minute]:6[prime or minute],4[prime or minute][prime or minute]-terpyridine (L2), 4[prime or minute]-(4-isopropylphenyl)-4,2[prime or minute]:6[prime or minute],4[prime or minute][prime or minute]-terpyridine (L3), and 4[prime or minute]-biphenyl-4,2[prime or minute]:6[prime or minute],4[prime or minute][prime or minute]-terpyridine (L4) have been synthesized for comparative purposes. The reactions of CuCN and L1-L4 under the same solvothermal conditions provided four CuCN coordination polymers: [(CuCN)2L1]n (1), [(CuCN)2L2]n (2), [(CuCN)2L3]n (3), and {[(CuCN)3L41.5][middle dot]H2O}n) (4), respectively. Single-crystal X-ray analyses reveal that compounds 1-3 are isostructural with the same topological 4-fold interpenetrated 3D CuCN networks, and compound 4 is a non-interpenetrated CuCN network. This success demonstrates that the interpenetration is suppressed by the alteration of the size of the pendant groups of terpyridine ligands.
ISSN:1466-8033
1466-8033
DOI:10.1039/c1ce05565h