非线性光学晶体MMTWMP的热学和光学性质的测定

报道了一种新型非线性光学晶体：二水合二N-甲基-(-吡咯烷酮合硫氰酸汞锰(MMTWMP)。用热重分析法、差示扫描量热法、吸光光度法、红外和粉末衍射光谱研究了它的热学和光学性质。它属于四方晶系，晶胞参数为α-1．21294，C=0．822.38nm，V=1．21127nm^3。MMTFMP晶体具有较好的物理化学稳定性。它的紫外截止波长为360nm。比硫氰酸汞锰，MnHg(SCN)4(MMTC)紫移了13nm。它在404nm的透过率为44．82％，比MMTC高了17．46％。

Determination of Thermal and Optical 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(H_2O)_2.2(C_3H_6CONCH_3),(abbreviated as MMTWMP), a new organometallic nonlinear optical crystal material is reported. Its thermal and optical properties are studied by using thermogravimetric analysis, differential scanning calorimetry, transmission, infrared and Raman spectroscopy and X-ray powder diffraction. The crystal belongs to the tetragonal crystallographic system, with cell parameters:a=1.2129 4,c=0.822 38 nm,V=1.21127 nm~3. 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.