Divergent layer topologies in divalent metal aliphatic dicarboxylate coordination polymers containing 3-pyridylmethylnicotinamide

作者：White Charmaine L; Salgado Maria D Torres; Mizzi Jessica E; LaDuca Robert L

来源：Journal of Molecular Structure, 2015, 1101: 147-154.

DOI：10.1016/j.molstruc.2015.08.032

• Crystal structure
• Coordination polymer
• Luminescence
• Cadmium
• Copper

Hydrothermal reaction of the requisite metal salt, an aliphatic dicarboxylic acid, and the hydrogen-bonding capable dipyridylamide ligand 3-pyridylmethylnicotinamide (3-pmna) resulted in four coordination polymers whose connectedness and layer topology depend on the metal coordination environment and dicarboxylate binding mode. These new crystalline phases were characterized by single crystal X-ray diffraction. [Cu(ox)(3-pmna)](n) (1, ox = oxalate) manifests stacked 3-connected (6,3) herringbone layer motifs. {[Cd(mal)(3-Pmna)(H2O)]center dot 3H(2)O}(n) (2, mal = malonate) shows a 4-connected (4,4) grid topology with entrained water molecule trimeric chains in the interlamellar regions. {[Cd-2(suc)(2)(3-pmna)(H2O)]center dot 3H(2)O}(n) (3, suc = succinate) possesses {Cd2O2} dimer-based [Cd(suc)](n) layers pillared by 3-pmna ligands into a 5-connected sandwich motif with 4(8)6(2) topology. {[Cd(glu)(3-pmna)(H2O)]center dot 3H(2)O}(n) (4, glu = glutarate) manifests a rippled (4,4) grid topology. Luminescent behavior in the cadmium complexes is ascribed to intra-ligand molecular orbital transitions. Thermal decomposition behavior is also discussed herein.

• 出版日期2015-12-5