1445781-34-9Relevant academic research and scientific papers
Assembly of Zn/Cd coordination polymers containing helixes or polycatenane structures tuned by the tri-pyridyl-bis-amide ligands with different spacer: Syntheses, structures, photoluminescent and photocatalytic properties
Wang, Xiuli,Huang, Jingjing,Liu, Lianli,Liu, Guocheng,Lin, Hongyan,Zhang, Juwen,Chen, Naili,Qu, Yun
, p. 1960 - 1969 (2013)
Four new d10 metal-organic coordination polymers tuned by the V -shaped tri-pyridyl-bis-amide ligands with different spacers, namely, [Zn(L1)(BDC)]·H2O (1), [Cd(L 1)(BDC)]·H2O (2), [Zn(L2)(BDC)] (3) and [Cd(L2)(BDC)] (4) (L1 = N,N′-bis(pyridine-3-yl) pyridine-2,6-dicarboxamide, L2 = N,N′-bis(pyridine-3-yl) pyridine-3,5-dicarboxamide, H2BDC = 1,4-benzenedicarboxylic acid) have been synthesized under hydrothermal conditions. In complexes 1 and 2, the metal ions are linked by L1 to form left- and right-helical Zn/Cd-L1 chains, which are further extended into two-dimensional (2D) wave-like layers by BDC anions. In 3, two L2 ligands link two ZnII ions forming the Zn2(L2)2 loops, which are connected by BDC anions to form a (2·65) topological 2D network. In addition, the large Zn2(L 2)2 loops are threaded by the BDC rods from above and below 2D layers so as to form 2D → 3D polyrotaxane and polycatenane structures. In 4, the CdII ions are linked by L2 ligands to generate 1D double chain ribbons with Cd2(L2) 2 loops, which are further connected by the BDC linkers to form a 3D framework. Two identical 3D frameworks interpenetrate each other in a twofold mode, giving rise to a polyrotaxane and polycatenane array, which is relative limited. The diverse structures of complexes 1-4 demonstrate that the tri-pyridyl-bis-amide ligands and the central metals have significant effect on the final structures. The thermal stability and fluorescent properties of complexes 1-4 have been investigated. In addition, the title complexes exhibit photocatalytic activity for dye methylene blue degradation under UV light.
