Molecular and crystal engineering of a new class of inorganic cadmium-thiocyanate polymers with host-guest complexes as organic spacers, controllers, and templates

摘要

This review provides an account of the structures of polymeric anionic cadmimum-thio- cyanate coordination solids with cationic crown-ether-metal complexes as spacers, con- trollers, and templates. Specifically, depending upon the size, shape, symmetry, and charge of the cationic host-guest complexes, this highly interesting series of coordination solids gives rise to a wide variety of structures, ranging form one-dimensional (1-D) single-chain structures (as exemplified by [(18C6)K][Cd(SCN)_3] and [(18C6)_2Na_2(H_2O)_2]_1/2[Cd(SCN)_3]), to 1-D double-chain structures (as observed in [(15C5)_2K][Cd_2(H_2O)_2](SCN)_5) and [(15C5)_2- Na_2(H_2O)_2][Cd_2(SCN)_6] and [(12C)_2Cd][Cd_3(SCN)_8]).