Abstract

Single crystals of bis(thiourea)cadmium(II) chloride, bis(ethylene thiourea)-cadmium(II) chloride, tris(allylthiourea)cadmium(II) chloride and tetrakis-(phenylthiourea)cadmium(II)chloride complexes were grown using conventional slow evaporation solution growth technique. The structure and crystallinity of the materials were confirmed by powder XRD analysis. The optical properties of specimens were analyzed by UV-DRS spectroscopy. FT-IR studies recognize the vibrations of functional groups present. SEM examines surface morphology. TGA and DTA expose the specimen's purity, and the decomposition was not identified until the melting point. Microhardness studies also studied the mechanical behavior of the samples. Kurtz and Perry powder technique estimates the second harmonic generation efficiency of the as-grown specimens. It is interesting to observe that the allylthiourea complex exhibits the maximum SHG efficiency. Ethylene and phenylthiourea complexes are SHG inactive since they crystallize in centrosymmetric space groups. The intermolecular interactions and crystal packing make known that close contacts are related with strong interactions.

摘要

双（硫脲）氯化镉（II）、双（亚乙基硫脲）-氯化镉（II）、三（烯丙基硫脲）氯化镉（II）和四（苯基硫脲）氯化镉（II）复合物的单晶使用常规生长缓慢蒸发溶液生长技术。通过粉末XRD分析证实了材料的结构和结晶度。通过UV-DRS光谱分析样品的光学性质。FT-IR 研究识别存在的官能团的振动。SEM 检查表面形态。TGA 和 DTA 暴露了样品的纯度，直到熔点才确定分解。显微硬度研究还研究了样品的机械性能。Kurtz 和 Perry 粉末技术估计了生长样品的二次谐波产生效率。有趣的是，烯丙基硫脲复合物表现出最大的 SHG 效率。乙烯和苯基硫脲配合物是 SHG 惰性的，因为它们在中心对称空间群中结晶。分子间相互作用和晶体堆积表明紧密接触与强相互作用有关。