Functional self-assembly of hydrogen-bonded 3D coordination networks constructed from 1,2,4,5-benzenetetracarboxylic acid
摘要:
Hydrothermal synthesis, characterization (IR, TG/DTA, element analysis, inductively coupled plasma (ICP)) and single-crystal X-ray structures of H(4)Btec hydrate and its two cobalt complexes, colorless [H(4)Btec center dot 2H(2)O] (n) (I), pink [Co(H2O)(6)(H(2)Btec)] (n) (II), and nacarat {[Co(H2O)(3)(H(2)Btec)(Phen)] center dot H2O} (n) (III) (H(4)Btec = 1,2,4,5-benzenetetracarboxylic acid, Phen = 1,10-phenanthroline) have been solved. The results showed that I forms a 3D O-H center dot center dot center dot O hydrogen-bonded network generated from H(4)Btec and water molecules, II presents a 3D network constructed by mononuclear [Co(H2O)(6)](2+) cations and H(2)Btec(2-) dianions through extensive hydrogen-bonding interactions, and III gives rise to a pseudo-octahedral coordination geometry. Extensive hydrogen-bonding interactions have significant effects in configuring a 3D network constructed by mononuclear [Co(H(2)Btec)(Phen)(H2O)(3)] neutral molecules and a water molecules.