排序方式: 共有79条查询结果,搜索用时 187 毫秒
31.
32.
阴离子功能化的咪唑盐LCl(L=HO-4,6-di-tBu-C6H2-2-CH2{CH[NCHCHN]iPr})与无水YbCl3反应成功合成阴离子功能化的咪唑基五氯化物镱L3[YbCl5(THF)]2-Cl-,产物通过元素分析、IR、X-ray射线衍射法表征。晶体结构表明配合物属于三斜晶体,空间群P1,晶胞参数a=1.6082(4)nm,b=1.6522(4)nm,c=1.7778(5)nm,α=81.682(16)°,β=81.378(16),γ=68.172(10)°,V=4.315(2)nm3,Z=2,F(000)=1750,D=1.280Mg/m3,μ=1.32mm-1,R1=0.1076,wR2=0.2213。氢键的存在对空间网状结构的形成起着重要的作用。 相似文献
33.
34.
35.
36.
37.
该文针对传统方法中光引发剂定量检测耗时长、无空间分辨信息的缺陷,开发了基于微液节点采样-质谱系统的光引发剂定量成像方法,并将其用于包装纸中光引发剂的检测。研究表明,采样探针直接与质谱连接的接口方式具有更高的检测灵敏度,最优萃取剂可在1 min内实现单点采样超过90%的回收率,使得分析物可直接通过外标法定量。将该方法应用于包装纸中光引发剂的成像分析并与传统定量检测方法进行比较。结果显示:建立的成像方法可检测到比传统方法种类更多的光引发剂,且与传统方法的定量结果基本一致。另外,成像方法提供了更多丰富的空间分布信息,这对于包装纸中光引发剂的筛查定位以及指导和改进光固化油墨的涂布配方或工艺具有重大意义。 相似文献
38.
In this paper, the adsorption of Ag^+ and hydrated Ag^+ cations on clean Si(111) surface were investigated by using cluster (Gaussian 03) and periodic (DMol^3) ab initio calculations. Si(111) surface was described with cluster models (Si14H17 and Si22H21) and a four-silicon layer slab with periodic boundary conditions. The effect of basis set superposition error (BSSE) was taken into account by applying the counterpoise correction. The calculated results indicated that the binding energies between hydrated Ag^+ cations and clean Si(111) surface are large, suggesting a strong interaction between hydrated Ag^+ cations and the semiconductor surface. With the increase of number, water molecules form hydrogen bond network with one another and only one water molecule binds directly to the Ag^+ cation. The Ag^+ cation in aqueous solution will safely attach to the clean Si(111) surface. 相似文献
39.
40.