Tetrathiourea cobalt dichloride compound and single crystal preparation method thereof

Abstract

The chemical formula of the tetrathiourea cobalt dichloride compound is CoCl2 (CS (NH2) 2) 4, the crystal form of the tetrathiourea cobalt dichloride compound is of a single pure-phase tetragonal structure, the single crystal size of the tetrathiourea cobalt dichloride compound is centimeter level, the space group of the tetrathiourea cobalt dichloride compound is P42 / n, the cell parameters of the tetrathiourea cobalt dichloride compound are alpha = 90 degrees, beta = 90 degrees and gamma = 90 degrees, and the density of the tetrathiourea cobalt dichloride compound is 434.32 g / cm < 3 >. The tetrathiourea cobalt dichloride compound provided by the invention is a novel pure-phase organic tetragonal structure compound; according to the spontaneous nucleation method, centimeter-level transparent single crystal particles can be obtained, the operation is simple, the cost is low, the growth speed is high, the optical quality is high, and the like.

Description

technical field [0001] The invention relates to the technical field of organic compound synthesis and nonlinear optical materials, in particular to a tetrathiourea cobalt dichloride compound and a method for preparing a single crystal thereof. Background technique [0002] In all-solid-state lasers, the laser is obtained by performing multi-stage frequency conversion of the fundamental wave light through nonlinear optical crystals. Therefore, in order to obtain high-quality laser output, in addition to high-power, high-beam quality pump sources, high-quality non-linear Linear optical crystals are essential. [0003] Most of the nonlinear optical materials discovered so far are inorganic compounds, but there are very few organic nonlinear optical materials. This is because the agglomeration between organic groups in most organic nonlinear optical materials will cause the energy gap to red shift. This causes the crystal to absorb light in the ultraviolet wavelength range, thu...

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Problems solved by technology

[0003] Most of the nonlinear optical materials discovered so far are inorganic compounds, while organic nonlinear optical materials are rare. This is because the agglomeration of organic groups in most organic nonlinear optical materials will cause the energy gap to red shift. It causes the crystal to absorb light in the ultraviolet range, so it is opaque; secondly, the dipole interaction between the organic nonlinear anion groups is relatively large, making most organic compounds have a centrosymmetric structure, so there is no second-order nonlinear effect

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