Yu Chen , Hong-Yu Wang , Xiao-Xiang Fan , Xiu-Qi Kang , Li-Rong Guo , Jin-Zhong Gu , Mohammad Azam
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引用次数: 0
Abstract
A series of eight coordination polymers incorporating transition metals [M = Co(II), Ni(II), Mn(II), Zn(II), and Cd(II)] were effectively produced via hydrothermal techniques. The primary ligand used in the synthesis was 2-amino-[1,1′-biphenyl]-4,4′-dicarboxylic acid (H2abda), combined with various auxiliary ligands, including 1,10-phenanthroline (phen), 2,2′-bipyridine (bipy), 2,2′-biimidazole (H2biim), 1,4-bis(pyrid-4-yl)benzene (bpb), and pyridine (py). This process produced one 1D, one 2D, and six 3D coordination polymers, designated as [Mn(μ4-abda)(H2O)2]n (1), [Mn(μ4-abda)(phen)]n (2), [Mn(μ4-adba)(bipy)]n·nH2O (3), [Cd(μ3-abda)(bipy)]n (4), [Mn(μ-abda)(H2biim)2]n·2nH2O (5), [Ni2(μ-abda)(μ4-abda)(μ-bpb)2(H2O)2]n·2nH2O (6), [Co2(μ-abda)(μ4-abda)(μ-bpb)2]n·nH2O (7), and [Zn4(μ4-abda)2(μ3-abda) (μ3OH)(μ-OH)(py)2]n (8). These coordination polymers were thoroughly studied to investigate their structural topologies and catalytic efficacy. Coordination polymer 8 exhibited remarkable catalytic efficacy in the Henry reaction involving pyridine-3-aldehyde, achieving high yields under optimized conditions. It demonstrated exceptional stability, effectiveness, and reusability as a heterogeneous catalyst.
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