Nitrobenzene-detection cadmium thiophenedicarboxylate coordination polymers with flexible dipyridylamide ligands and diverse topologies
作者:Jack J. Przybyla、Robert L. LaDuca
DOI:10.1016/j.ica.2018.10.039
日期:2019.2
Hydrothermal reaction of cadmium nitrate, 2,5-thiophenedicarboxylic acid (H(2)tdc) and one of the conformationally flexible dipyridylamide ligands N,N'-(heptane-1,7-diyl)dinicotinamide (hedn), N,N'-(hexane-1,6-diyl)diisonicotinamide (hdin), N,N'-(hexane-1,6-diyl)dinicotinamide (hdn), N,N'-(propane-1,3-diyl)dinicotinamide (pdn), N,N'-(propane-1,3-diyl)diisonicotinamide (pdin) produced five new coordination polymers which were structurally characterized by single-crystal X-ray diffraction. [Cd(tdc)(hedn)(H2O)]center dot 3H(2)O}(n) (1) manifests looped (4,4) grid motifs with two-fold parallel interpenetration. [Cd(tdc)(hdin)(H2O)]center dot H2O}(n) (2) shows stacked (4,4) grid motifs. [Cd-2(tdc)(2)(hdn)(H2O)(4)]center dot H2O}(n) (3) exhibits herringbone (6,3) grid motifs. In contrast to the 2D topologies seen in 1-3, [Cd-2(tdc)(2)(pdn)(H2O)(2)]center dot 4H(2)O}(n) (4) displays a 3D self-penetrated net with 6(4)8(2) nbo topology and [Cd(tdc)(pdin)](n) (5) shows a 1D ribbon structure constructed from staple-conformation pdin ligands and Cd2O2} dimer-containing [Cd(tdc)](n) chains. Thermal decomposition and nitrobenzene detection properties of these five new materials are discussed.