Synthesis, Growth, and Characterization of a New Thiourea and Bismuth Chloride Complex with Excellent Nonlinear Optical Properties  

作　　者：Liang Zhang Lina Zhou Baohong Hou Qiuxiang Yin Chuang Xie 

机构地区：[1]School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China [2]National Engineering Research Center of Industrial Crystallization Technology, Tianjin University,Tianjin 300072, China [3]National Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, China

出　　处：《Transactions of Tianjin University》2018年第6期532-537,共6页天津大学学报（英文版）

基　　金：the support by the National Key Research and Development Program of China(No.2016YFC0400408)

摘　　要：Crystals of a new organometallic nonlinear optical （NLO） compound, di-ta-chloro-bis[chlorotri（thiourea）bismuth（Ⅲ）]- pentachloro（thiourea）bismuth-ate（Ⅲ） （DCBPB）, have been successfully grown from formic acid aqueous solutions of thio-urea and bismuth chloride by a slow evaporation technique. The crystal structure and atomic composition of DCBPB have been confirmed by single crystal X-ray diffraction （SCXRD）, Fourier transform infrared spectra, and elemental analysis. The SCXRD results proved that DCBPB crystallizes in triclinic space group P1 with unit cell dimensions of a = 7.0606（2） A, b = 8.8106（4） A, c = 16.3247（8） A, a = 99.242（4）°, fl = 95.309（3）°, ）/= 105.856（3）°, and Z= 2. DCBPB crystal exhibits excel-lent transmittance from 500 to 2500 nm and green fluorescence with maximum emission at 508 nm. The thermogravimetric-differential scanning calorimetry （TG-DSC） analysis indicates that a solid-phase reaction took place at 170.1 ℃, whereas the decomposition temperature of the crystal material was 189℃. The NLO property obtained by the Kurtz powder test showed that the second harmonic generation efficiency of DCBPB crystal is two-seventh of KDP crystal.Crystals of a new organometallic nonlinear optical(NLO) compound, di-μ-chloro-bis[chlorotri(thiourea)bismuth(Ⅲ)]-pentachloro(thiourea)bismuth-ate(Ⅲ)(DCBPB), have been successfully grown from formic acid aqueous solutions of thiourea and bismuth chloride by a slow evaporation technique. The crystal structure and atomic composition of DCBPB have been confirmed by single crystal X-ray diff raction(SCXRD), Fourier transform infrared spectra, and elemental analysis. The SCXRD results proved that DCBPB crystallizes in triclinic space group P1 with unit cell dimensions of a = 7.0606(2) ?, b = 8.8106(4) ?, c = 16.3247(8) ?, α = 99.242(4)°, β = 95.309(3)°, γ = 105.856(3)°, and Z = 2. DCBPB crystal exhibits excellent transmittance from 500 to 2500 nm and green fluorescence with maximum emission at 508 nm. The thermogravimetricdiff erential scanning calorimetry(TG-DSC) analysis indicates that a solid-phase reaction took place at 170.1 ℃, whereas the decomposition temperature of the crystal material was 189 ℃. The NLO property obtained by the Kurtz powder test showed that the second harmonic generation efficiency of DCBPB crystal is two-seventh of KDP crystal.

关 键 词：NLO ORGANOMETALLIC THIOUREA Bismuth chloride TG-DTA 

分 类 号：O641.4[理学—物理化学]