Spacers-induced structural diversity of cobalt coordination polymers based on "V" -type dipyridylamide and dicarboxylic ligands: Fluorescent, magnetic and photocatalytic properties

作者：Liu, Guo-Cheng; Yu, Hui-Xuan; Lin, Hong-Yan^*; Wang, Xiu-Li; Li, Xiao-Wu^*

来源：Polyhedron, 2017, 126: 205-213.

DOI：10.1016/j.poly.2017.01.022

• Coordination polymers
• "V" -type dipyridylamide
• Fluorescent properties
• Magnetic properties
• Photocatalytic properties

To investigate the effect of the spacers of "V"-type dipyridylamide and dicarboxylic ligands on the structural diversity of Co-II coordination polymers, [Co(L-1)(5-CH3-1,3-bdc)].2H(2)O (1) [Co(L-2)(5-CH3-1,3-bdc) (H2O)]. H2O (2) [Co(L-2)(5-NO2-1,3-bdc)(H2O)] H2O (3) [Co(L-2)(1,3-bdc)(H2O)] H2O (4) [Co(L-2)(4,4'-oba)] 3H(2)O (5) and L-2.2H(2)O (6) [L-1=N,N'-bis(pyridine-3-yl)pyridine-2,6-dicarboxamide, L-2 = N,N'-bis(pyridine-3-yl)-5-methylisophthalic dicarboxamide, 5-CH3-1,3-H(2)bdc = 5-methylisophthalic acid, 5-NO2-1,3-H(2)bdc = 5-nitroisophthalic acid, 1,3-H(2)bdc 1,3-benzenedicarboxylic acid, 4,4'-H(2)oba = 4,4'-oxybis(benzoic acid)] have been hydrothermally synthesized. Complexes 1-5 were characterized by IR spectroscopy, thermal analysis, TG and X-ray single-crystal diffraction. Complex 1 is a 2D structure based oh (4,4)-connected [Co(5-CH3-1,3-bdc)] network and [Co(L-1)] helixes. Complexes 2-4 feature isostructural 2D networks derived from Co-dicarboxylate linear chains and [Co(L-2)] helixes. Complex 5 show 1D tubular structure constructed by two parrelled [Co(4,4'-oba)] linear chains and [Co(L-2)] loops. Compound 6 is a 3D supramolecular structure extended by L-2 ligands and water molecules. The effect of the spacers of "V"-type dipyridylamide and dicarboxylic ligands on the structures of the title compounds were discussed. The magnetic property of 1, the fluorescent behaviors of 1-6 and photocatalytic properties of 1-5 under UV irradiation were studied.

• 出版日期2017-4-18
• 单位渤海大学; 东北大学