Syntheses, Structures, and Magnetic Properties of Two Cobalt(II) Metal- Organic Frameworks Based on Y-shaped 3,5,4'-Azobenzenetricarboxylic Acid and Different N-donor Ligands.

Two metal-organic frameworks, [Co2(ABTC)(bimh) (OH)]·2H2O (1) and [Co3(ABTC)2(dimb)4]n (2) [H3ABTC = 3,4',5- azobenzenetricarboxylic acid, bimh = 1,1'-(1,4-hexanediy)bis(imidazole), dimb = 1,4-bis(1H-imidazol-1-yl)benzene], were prepared under solvothermal conditions and structurally characterized. Complex 1 demonstrates a complicated 3D (3,8)-connected tfz-d net with (43)2(46.617.85) topology. The framework of 2 can be classified as a rare 3D (3,6,6)-connected net with the Schäfli symbol of (4.62)2(42.610.83)(44.610.8), and exhibits an intriguing self-penetrating motif. Meanwhile, the thermal stabilities and magnetic properties for 1 and 2 were also probed. [ABSTRACT FROM AUTHOR]