Add time:07/30/2019         Source:sciencedirect.com

Four coordination complexes, namely, [Cu(HBCB)]n (1), {[Cu(HBCB)(o-bimb)]·H2O} (2), {[Cu1.5(BCB)(m-bimb)1.5]·DMF}n (3), and [Co1.5(BCB)(bpy)1.5(H2O)]n (4), have been assembled from the semirigid tripodal 3,5-bis(2-carboxylphenoxy)benzoic acid (H3BCB) in the presence or absence of the N-donors (o-bimb = 1,2-bis(imidazol-1-ylmethyl)benzene, m-bimb = 1,3-bis(imidazol-1-ylmethyl)benzene, bpy = 4,4′-bipyridine). Structural analyses revealed that complex 1 features a {Cu2(COO)4} SBUs based 3D (3,6)-connected {4·62}2{42·610·83}-rtl net. Complex 2 displays an interesting coordination molecule cage structure. Complex 3 exhibits a 2D (3,4,4)-connected {4·62}2{4·64·8}2{64·82} sheet. And complex 4 shows a 3D (3,4,6)-connected {5·62}2{56·64·7·82·92}{64·8·9} net based on the binuclear {Co2(COO)2} SBUs and Co2 ions. The temperature-dependent magnetic susceptibilities indicated there are gradual spin transition behavior in 1, and antiferromagnetic interactions in 4.

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