Coordination polymers from the self-assembly of silver(I) salts and two nonlinear aliphatic dinitrile ligands, cis-1,3-cyclopentanedicarbonitrile and cis-1,3-bis(cyanomethyl)cyclopentane: synthesis, structures, and photoluminescent properties.
Six coordination polymers with aliphatic dinitrile ligands, {[Ag(cpdcn)2]ClO4}n (6a), {[Ag(cpdcn)2]PF6}n (6b), {[Ag(cpdcn)2]SbF6}n (6c, cpdcn = cis-1,3-cyclopentanedicarbonitrile), {[Ag(bcmcp)2] ClO4}n (7a), {[Ag(bcmcp)2]PF6}n (7b), {[Ag(bcmcp)2]SbF6}n, (7c, bcmcp = cis-1,3-bis(cyanomethyl)cyclopentane) have been synthesized and structurally characterized by IR spectroscopy, differential scanning calorimetry (DSC), thermogravimetric analysis (TGA) and X-ray crystallography. Both ligands used in this study are meso-compounds; while the ligand cpdcn is structurally rigid, the ligand bcmcp has greater conformational flexibility. X-ray crystallography has revealed that structures 6a-c consist of chiral 1D-polymers. The structure of complexes 7a and 7b are best described as a 2D chiral (4,4) square mesh with 3-fold parallel interpenetration. Surprisingly, complex 7c was characterized to be an achiral 1D coordination polymer. The synthesis of the ligands, IR spectra of the free and coordinated CN groups, DSC and TGA, and the photoluminescent properties of complexes 6a-c and 7a-c are also discussed.
Genuis
Emerson D
ED
Department of Chemistry, The King's University College, 9125 50 St. Edmonton, Alberta, Canada T6B 2H3.
Kelly
Joel A
JA
Patel
Malay
M
McDonald
Robert
R
Ferguson
Michael J
MJ
Greidanus-Strom
Grace
G