Spectroscopy and Spectral Analysis, Volume. 35, Issue 5, 1340(2015)
Synthesis,Structure and Spectroscopy Study of a 1D Copper Coordination Polymer Based on a Carboxybenzyl Viologen Ligand and SCN-Anion
A zwitterionic viologen derivative ligand,1,1’-bis(4-carboxybenzyl) -4,4’-bipyridinium dichloride(H2BpybcCl2) as a multifunctional ligand,has been synthesized incorporating a 4,4’-bipyridine core with two carboxylate groups as a building block,specifically designed for the rational construction of metal-organic frameworks.H2BpybcCl2 ligand is a multifunctional ligand that contains viologen’s specific functions and carboxylate coordination groups.The coordination polymers of viologen carboxylate with copper thiocyanate are not reported to date.A novel copper coordination polymer,[Cu(SCN)2(Bpybc)](Ⅰ) was by solution diffusion method and characterized by single-crystal X-ray diffraction,XRD,elemental analyses,IR spectroscopy,UV-Vis DRS,TG analysis and liquid-state luminescent properties.Compound Ⅰ crystallized in the monoclinic system with C2/c space group.Crystal data for complex Ⅰ is as follow:a=19.508(4) ,b=9.474(2) ,c=16.963(3) ,α=90°,β=124.92(3)°,γ=90°.Two SCN- anions were coordinated to the Cu2+ cation forming a [Cu(SCN)2] unit.Complex Ⅰ was built up by [Cu(SCN)2] units bridged sequentially by ladder-shaped Bpybc ligands to form one-dimensional zigzag chains running along the [203] direction.The chains were held together by π—π interaction between the pyridine rings and phenyl rings,thus yielding a 3-D extended supramolecular network.The UV-Visible absorption spectra show the absorption bands of π—π* transitions of Bpybc ligands and d→d transition of Cu2+.The liquid-state luminescent property of compound Ⅰ was investigated at room temperature.Attractively,the complex exhibits strong blue emission peak at 533 nm(λEx=360 nm) that can be assigned to intraligand transition of Bpybc ligand when it was excited at 360 nm.
Get Citation
Copy Citation Text
QIU Li-xia, WAN Fang, ZHU Bin-bin, SUN Yan-qiong, YOU Yi, CHEN Yi-ping. Synthesis,Structure and Spectroscopy Study of a 1D Copper Coordination Polymer Based on a Carboxybenzyl Viologen Ligand and SCN-Anion[J]. Spectroscopy and Spectral Analysis, 2015, 35(5): 1340
Received: Mar. 11, 2014
Accepted: --
Published Online: May. 26, 2015
The Author Email: Li-xia QIU (sunyanqiong@fzu.edu.cn)