CHEMISTRY OF MATERIALS, v.25, no.7, pp.1047 - 1054
Abstract
Metal-organic frameworks, [Ni(HBTC) (dabco)] (2) and [Ni-2(HBTC)(2)(bipy)(0.6)(dabco)(1.4)] (3) (where H3BTC is 1,3,5-benzenetricarboxylic acid, dabco is 1,4-diazabicyclo[2.2.2]octane, and bipy is 4,4'-bipyridine), were prepared via postsynthetic ligand exchanges of [Ni(HBTC)(bipy)] (1). By controlling the concentration of dabco, we could obtain not only entropically favorable 2 with completely exchanged dabco but also enthalpically favorable 3 with selectively exchanged bipy/dabco in the alternating layers.