IIB族金属-硫脲配合物非线性光学晶体的研究进展

Progress of Research on Group IIB Metal-thiourea Coordination Compounds as Nonlinear Optical Crystals

以硫脲及其衍生物为配体的配合物的研究是非线性光学晶体材料研究的一个热点。这类配合物大都以IIB族金属为中心离子,根据配体不同可分为硫脲类、烯丙基硫脲类及缩胺基硫脲类3种类型。这些配合物分子具有相似的四面体结构,晶体生长采用溶液降温或蒸发法,性质表征主要侧重于粉末倍频效应、光谱特性和热分析。未来研究重点在于此类材料的分子设计和晶体工程,采用理论与实验相结合的方法探索具有较强非线性光学效应的新材料。

Coordination compounds with thiourea and its derivatives as ligands have been applied widely, including used as nonlinear optical materials, which is a research hotspot. These coordination compounds mostly have group IIB metals as center ions. The complexes are classified with ligand as three types： thiourea type, allyhhiourea type and thiosemicarbazone type. The molecules of these compounds have a similar tetrahedron structure. The crystals are grown by solution method. The characterization is emphasized particularly on powder frequency doubling effect, spectrum properties and thermal analy sis. The main investigating aspects will be the molecular designing and the crystal engineering of these materials, and searching new nonlinear optical materials by theoretical-experimental method.