| Abstract |
Three 2D coordination polymers, [Cu-2(mu(4)-dpa)(bipy)(2)(H2O)](n)center dot 6nH(2)O (1), [Mn-2(mu(6)-dpa)(bipy)(2)](n) (2), and [Zn-2(mu(4)-dpa)(bipy)(2)(H2O)(2)](n)center dot 2nH(2)O (3), were prepared by a hydrothermal method using metal(II) chloride salts, 3-(2 ,4 -dicarboxylphenoxy)phthalic acid (H(4)dpa) as a linker, as well as 2,2 -bipyridine (bipy) as a crystallization mediator. Compounds 1-3 were obtained as crystalline solids and fully characterized. The structures of 1-3 were established by single-crystal X-ray diffraction, revealing 2D metal-organic networks of sql, 3,6L66, and hcb topological types. Thermal stability and catalytic behavior of 1-3 were also studied. In particular, zinc(II) coordination polymer 3 functions as a highly active and recoverable heterogeneous catalyst in the mild cyanosilylation of benzaldehydes with trimethylsilyl cyanide to give cyanohydrin derivatives. The influence of various parameters was investigated, including a time of reaction, a loading of catalyst and its recycling, an effect of solvent type, and a substrate scope. As a result, up to 93\% product yields were attained in a catalyst recoverable and reusable system when exploring 4-nitrobenzaldehyde as a model substrate. This study contributes to widening the types of multifunctional polycarboxylic acid linkers for the design of novel coordination polymers with notable applications in heterogeneous catalysis. |
