Synthesis, structure and photochromic properties of a novel supramolecular compound (HisH2)2SiW12O40·6H2O
A novel supramolecular single-crystal compound, histidine salt of 12-silicotungstate ((HisH2)2SiW12 O40·6H2O, denoted as HSW), has been synthesized by a solution method and its structure has been characterized by single crystal X-ray diffraction technique and FTIR spectra. This supramolecular compound mainly consists of a polyoxometalate anions SiW12O404-and two protonated histidine cations HisH22+. Its crystal structure belongs to monoclinic system (space group C2/c) with a=24.4005(18), b=12.9788(10), c=18.6898(14)., β=124.0380(10) °, V=4904.8(6).3, Z=4 and Dcalc=4.465 g cm-3. The final statistics based on F2 are GOF=1.268, R1=0.0344 and wR2=0.0851 for I>2σ(I). X-ray diffraction analysis reveals that in the crystal structure of HSW, the anions SiW12O404-and HisH22+cations formed a three dimensional network through hydrogen bonds. The HSW compound shows photochromic properties under UV irradiation.
SUN Dehui ZHANG Jilin REN Huijuan CUI Zhenfeng SUN Dexin
Changchun Institute of Technology, Changchun 130012, P.R.China State Key Lab of Rare Earth Resource Utilization, Changchun, 130022, P.R.China The Amour Technology Institute of PLA, Changchun 130117, P.R.China
国际会议
2009 International Conference on Advanced Fibers and Polymer Materials(2009年先进纤维与聚合物材料国际学术会议)
上海
英文
784-787
2009-10-21（万方平台首次上网日期，不代表论文的发表时间）