By treating M(NO3)2 or MCl2 (M = Mn, Fe, Co and Ni) with 2,6-naphthalene dicarboxylic acid (ndcH2), a series of metal-carboxylate frameworks have been solvothermally synthesized under the same route with different buffering anions, which feature two kinds of frameworks based on slightly different linear M3(OOCR)6 secondary building units: [M3(ndc)3(DMF)4] n (M = MnII, FeII and CoII) or [M3(ndc)3(DMF)2(Me2NH) 2]n (M = CoII and NiII). Consequently, the two cobalt compounds exhibit different ...
