Crystal Research and Technology
Cryst. Res. Technol. 37 (2002) 551 - Abstract -

X. Q. Wang , D. Xu, X. F. Cheng, M. K. Lü, D. R. Yuan, J. Huang*, G. W. Lu**, T. X. Xie****, S. L. Wang, G. T. Lü, J. Q. Zhao, Z. H. Yang, Y. Chen***, Y. Q. Zhou***

State Key Laboratory of Crystal Materials, Institute of Crystal Materials, Shandong University, Jinan 250100, P.R. China
*College of Environmental Science and Engineering, Institute of Modern Analysis, Shandong University, Jinan 250100, P. R. China
**Department of Physics, Shandong University, Jinan 250100, P. R. China
***Laboratory of Geochemistry and Lithosphere Dynamics, Petroleum University, Dongying 250762, P. R. China
****State Key Engineering Laboratory, Institute of Chemistry, Chinese Academy of Science, Beijing 100080, P. R. China

Preparation and Properties of a Novel Nonlinear Optical Crystal: MnHg(SCN)4(H2O)2.2(C3H6CONCH3)

In this article, diaquatetrakis (thiocyanato) manganese(II) mercury(II)-N-methyl-2-pyrrolidone, MnHg(SCN)4(H2O)2.2(C3H6CONCH3), (abbreviated as MMTWMP), a new organometallic nonlinear optical crystal material is reported. The structure, optical and thermal characterizations were determined by elemental analysis, infrared and Raman spectroscopy, X-ray powder diffraction, thermogravimetric analysis, differential scanning calorimetry, special heat, SHG measurements and UV/Vis/NIR optical transmission spectra. It belongs to the tetragonal crystallographic system, with cell parameters: a = 12.1294, c = 8.2238Å, V = 1211.27Å3. Single crystals with dimensions up to 8 x 7 x 5 mm3 have been obtained. The morphology of the crystals was indexed. The MMTWMP crystal exhibits good physicochemical stability at normal temperature and pressure. Its UV transparency cutoff is 360 nm, which is shifted to the violet by 13 nm, as compared with MnHg(SCN)4 (MMTC); the optical transmission is 44.82% at 404 nm, which is by 17.46% higher than that of MMTC.

Keywords: crystal growth, MnHg(SCN)4(H2O)2.2(C3H6CONCH3), spectroscopic characterizations, thermal properties, optical properties


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