Hydrothermal synthesis of benzothiazole–carboxylic cadmium(II) coordination networks: pH-controlled topologies and compositional distributions

Using the hydrothermal synthetic method, two cadmium complexes (1 and 2) with an identical chemical formula of [Cd(ABTC)2]n (ABTC = 2-aminobenzothiazole-6-carboxylic acid) but completely different topologies were prepared at two different pH values of reaction solution, 5.3 and 7.3, respectively. Reaction with a pH in between resulted in a mixture of 1 and 2, and the ratio of two products was proportional to pH value of the reaction condition.