Metal and Ligand Effect on the Structural Diversity of Divalent Coordination Polymers with Mixed Ligands: Evaluation for Photodegradation.

Eight coordination polymers constructed from divalent metal salts, N,N ' -bis(pyridin-3-ylmethyl)terephthalamide ( L ), and various dicarboxylic acids are reported, affording [Co( L )(5-ter-IPA)(H 2 O) 2 ] n (5-tert-H 2 IPA = 5-tert-butylisophthalic acid), 1 , {[Co( L )(5-NO 2 -IPA)]⋅2H 2 O} n (5-NO 2 -H 2 IPA = 5-nitroisophthalic acid), 2 , {[Co( L ) 0.5 (5-NH 2 -IPA)]⋅MeOH} n (5-NH 2 -H 2 IPA = 5-aminoisophthalic acid), 3 , {[Co( L )(MBA)]⋅2H 2 O} n (H 2 MBA = diphenylmethane-4,4'-dicarboxylic acid), 4 , {[Co( L )(SDA)]⋅H 2 O} n (H 2 SDA = 4,4-sulfonyldibenzoic acid), 5 , {[Co 2 ( L ) 2 (1,4-NDC) 2 (H 2 O) 2 ]⋅5H 2 O} n (1,4-H 2 NDC = naphthalene-1,4-dicarboxylic acid), 6 , {[Cd( L )(1,4-NDC)(H 2 O)]⋅2H 2 O} n , 7 , and {[Zn 2 ( L ) 2 (1,4-NDC) 2 ]⋅2H 2 O} n , 8 , which were structurally characterized by using single-crystal X-ray diffraction. The structural types of 1 - 8 are subject to the metal and ligand identities, showing a 2D layer with the hcb , a 3D framework with the pcu , a 2D layer with the sql , a polycatenation of 2-fold interpenetrated 2D layer with the sql , a 2-fold interpenetrated 2D layer with the 2,6L1, a 3D framework with the cds , a 2D layer with the 2,4L1, and a 2D layer with the (10 2 ⋅12)(10) 2 (4⋅10⋅12 4 )(4) topologies, respectively. The investigation on the photodegradation of methylene blue (MB) by using complexes 1 - 3 reveals that the degradation efficiency may increase with increasing surface areas.