Crystal growth and characterization of a new organometallic nonlinear-optical crystal material: MnHg(SCN)4(C3H8O2)

A potentially useful second harmonic generation (SHG) organometallic nonlinear-optical crystal: manganese mercury tetrathiocyanate glycol monomethyl ether, MnHg(SCN) 4 (C 3 H 8 O 2 ) (MMTG) has been prepared, and high optical quality single crystals have been successfully grown by the slow temperature-lowering technique. Its structural, physicochemical and optical properties are characterized by elemental analyses, infrared spectroscopy, transmission electron microscopy (TEM), X-ray powder diffraction, thermal analysis, powder SHG measurements and Vis/UV/NIR spectroscopy. The results of characterizations have shown that MMTG possesses good physicochemical stabilities up to 145 °C, exhibits powder SHG efficiencies close to that of urea. The UV transparency cutoff is 375 nm, and the transmission is 33.54% at 404 nm, the sample thickness was 2.76 mm, which is 6% greater than that of MnHg(SCN) 4 (MMTC).