11-14
F.F.B.J. Janssen, L.P.J. Veraart, J.M.M. Smits, R. de
Gelder, A.E. Rowan,
Solvent, linker, and anion effects on the formation,
connectivity, and topology of
Cu(I)/PPh3/N-Donor ligand
coordination polymers,
Cryst.
Growth Des. 11 (2011) 4313-4325
Abstract
The effect of
linker, anion, and solvent on the formation, topology, and connectivity of
coordination polymers was investigated for polymers resulting from reactions
between [Cu(MeCN)(2)(PPh(3))(2)]
[X] (X = BF(4)(-), ClO(4)(-), and PF(6)(-)) and
nitrogen donor ligands (pyrazine,
4,4'-bipyridine, and 3,4'-bipyridine) in three solvents (CH(2)Cl(2), CHCl(3), tetrahydrofuran (THF)). The 18 crystallization experiments
with linear N-donor ligands yielded seven crystal
structures of one-dimensional (1D) and five crystal structures of
two-dimensional (2D) coordination polymers. The nine crystallization
experiments with the nonlinear N-donor ligand yielded
four crystal structures showing 1D coordination polymers. The isolated
compounds with linear N-donor ligands were
characterized by X-ray diffraction techniques, elemental analysis, and (1)H
NMR. The compounds with 3,4'-bipyridine were analyzed with single-crystal
diffraction. The thermal properties of several coordination polymers were
investigated by thermal gravimetric analysis (TGA) and differential scanning calorimetry (DSC) in order to determine the stability of
the polymers. These techniques show that the decomposition pathway of these
coordination polymers is not only determined by the topology of the polymers
but also by the interchain interactions. These
studies highlight that for a rational design and understanding of new
coordination polymer systems one should first systematically analyze the effect
of all parameters in order to filter out those ones that really determine the
desired network properties.