Abstract
Metal-organic frameworks (MOFs) have gained interest in the field of heterogeneous catalysis owing to their high surface areas and tunability. A well-studied Pd diphosphine pincer complex was functionalized with carboxylic acid groups and used as a linker for MOF assembly. The metallolinkers, H4[PdX-PCP] (H4[PdX-PCP] = XPd[C6H3-2,6-(Ar2PCH2)2], Ar = p-C6H4COOH, X = Cl, I), were used to assemble two MOFs containing copper paddlewheel secondary building units. These materials were characterized using single crystal and/or powder X-ray diffraction methods, as well as thermogravimetric analysis. An analogous set of metallolinkers with extended phosphine aryl substituents, H4[PdX-PCP-biPh] (H4[PdX-PCP-biPh] = XPd[C6H3-2,6-(Ar2PCH2)2], Ar = 1-C6H4-1’-C6H4COOH, X = Cl, I), were synthesized to study the effects of a larger linker on MOF assembly and structure.