碱金属18-冠-6与硫氰酸镉配合物晶体生长及其性质

Growth and Properties of Coordination Compounds of Alkali Metal 18--Crown--6 with Cadmium Thiocyanate Crystal

本文根据冠醚空腔结构的特殊配位性质与配合物的配位键理论,设想了碱金属18-冠-6与硫氰酸镉新的配合物;用凝胶法生长了这一新的配合物晶体;研究了凝胶的pH值、凝胶密度和反应液原始浓度等对晶体成核和生长的影响;生长出毫米级透明晶体和厘米级针状晶体。对所获得的晶体进行了红外光谱、X射线电子能谱、X射线粉末衍射和有机元素分析,实验结果证明了这一新型晶体正是作者预先所设想的新的配合物。采用激光粉末倍频效应法测定了这类晶体的倍频效应,发现这些晶体的倍频效应均优于ADP晶体。

The crystals of alkali metal 18-Crown-6 with cadmium thio-cyanate have been synthesized in silica gel (alkali metal: Na^+、K^+、NH_4^+).The influence of gel pH value, gel density and growth are also investigatedin this paper. The transparent crystals of millimeter dimension and centime-ter needle shaped crystals have been grown successfully. These crystals wereproved by IR spectra, X-ray photoeletron spectroscopy, X-ray powder diffrac-tion as well as organic elemental analysis. The SHG effect of the crystalswere studied by powder SHG effect method. It was found that the crystals aresuperior to ADP crystals in SHG effect.