第35卷，第5期 2015年5月
光谱学与光谱分析 Spectroscopy and Spectral Analysis
Vol.35,No.5-pp1340-1344
May,2015
Synthesis,Structureand Spectroscopy Study of a1DCopper
Coordination PolymerBased on a Carboxybenzyl
Viologen Ligand and SCN-Anion
QIU Li-xia',WAN Fang",ZHU Bin-bin',SUN Yan-qiong-2*,YOU Yil", CHEN Yi-ping
1. Department of Chemistry, Fuzhou University , Fuzhou 350108, China
2 . State Key Laboratory of Structural Chemistry , Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou350002, China
Abstract A zwitterionic viologen derivative ligand , 1 ,1'-bis (4-carboxybenzyl) -4 ,4'-bipyridinium dichloride(H BpybcCl ) 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 . H2 BpybcCl ligand is a multifunctional ligand that contains viologen's specific functions and car-boxylate coordination groups . The coordination polymers of viologen carboxylate with copper thiocyanate are not reported to date . A novel copper coordination polymer , [Cu(SCN ) (Bpybc)] ( I ) was by solution diffu-sion 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 : a19. 508(4) A, b=9. 474(2)A, c 16. 963(3) A, α=90°, 3-124. 92(3)°, =90°. Two SCN- anions were coordinated to the Cu2+ cation forming a [Cu(SCN ) unit . Complex I was built up by [Cu(SCN) ] units bridged sequentially by ladder-shaped Bpybc ligands to form one-dimensional zigzag chains running along the [203J direction . The chains were held together by π—π interaction between the pyridine rings and phenyl rings , thus yielding a 3-D ex-tended supramolecular network . The U V-Visible absorption spectra show the absorption bands of r' tran nodoa o adod aaa esin a oise e s dg o uos w as investigated at room temperature . Attractively , the complex exhibits strong blue emission peak at 533 nm(Aex =360 nm ) that can be assigned to intraligand transition of Bpybe ligand when it was excited at 360 nm .
KeywordsCarboxylate viologen ; Copper complex ; Crystal structure; Spectroscopic analysis ; Fluorescence spectrum
中图分类号：0657.3
Introduction
文献标识码：A
DOI: 10. 3964 /j. issn. 1000-0593(2015 )05-1340-05
have been well-known for a long time in both electrochemistry and photochemistry due to their potential applications as red-ox mediators and display materials and broadly used in prac-
In spite of the fact that viologens , a family of 1,1'-dis-ubstituted-4 ,4 '-bipyridinium dications and their derivatives Received : 2014-03-11 ; accepted : 2014-06-18
ticel) , and considerable attention has been focused on their properties till now . On the basis of charge transfer complexes
Foundation item: the Natural Science Foundation of China (21003020 ), the National Science Foundation for Fostering Talents in Basic Re
search of the National Natural Science Foundation of China (J1103303 ), the Natural Science Fund of Fujian Province(2013J01041) and the Foundation of State Key Laboratory of Structural Chemistry (20130012)
Biography : QIU Li-xia , (1988—), master student of Department of Chemistry of Fuzhou University
Corresponding authors
e-mail : sunyanqiong@ fzu .edu -cn ; youyi@ fzu .edu .cn