十一钨铌杂多阴离子的合成

通过可溶性铌酸钾与粉状白钨酸的反应,合成了钨铌杂多阴离子化合[C~4H~9)N]~nK~7-n[NbW~11O~40H~2](n=5,6).根据化学分析、红外光谱和拉曼光谱等,认为[NbW~11O~40.H~2]^7-和[W~12O~40H~2]^6-具有相同结构骨架.     

多环芳烃的在线毛细管超临界流体色谱／傅里叶变换红外光谱联用分析方法

 ］建立了一种毛细管柱超临界流体色谱／傅里叶变换红外光谱联用方法。成功地实现了对多环芳烃混合物的分析鉴定。该联用方法是在线分析鉴定复杂有机混合物的有效手段之一。     

Pr对K7MgBW11O39配合物的化学热扩渗及其导电性的研究

Praseodymium Chemistry-Heated Diffused Permeation is used to treat K₇MgBW₁₁O₃₉ for the first time. ICP， IR， XRD， TG-DTA， have been used to characterize K₇MgBW₁₁O₃₉·15H₂O and treated sample， indicating that Pr can be permeated into the body of this sample. The results of AC impedance spectra and DC four-probe show that the value of conductivity is 10⁴ times higher than that of sample before permeation at room temperature. At the range of 301～576K，the conductivity of permeated sample almost keep constant and its thermal stability improved more than 150K， which imply that this material is promising.     

粉状白钨酸研究 ⅩⅧ.二甲基亚砜配位多价金属十聚钨酸盐的制备和性质

以粉状白钨酸为原料,在H_2-DMSO的介质中制得了某些DMSO配位多价金属(Cu,Co,Ni,Zn,V,Pr,Nd)的十聚钨酸盐,测定了它们的红外、紫外吸收光谱、热分析及在溶液中的稳定性。     

二氢辅酶的电催化氧化——Ⅰ.α-萘甲酰尼罗蓝修饰电极性能研究

新的电子传递中间体α-萘甲酰尼罗蓝(NNB)能强烈吸附在石墨上以构成修饰电极,在-0.5V至+0.6V(vs.SCE)电位区内,固定化的NNB表现出相当可逆的氧化还原行为,总反应中有2个电子和2个质子参加,在pH7.0缓冲溶液中其表面标准电位E°′为—170mV,表观电子传递常数K_s为3s~(-1),NNB对还原辅酶NADH的电化学氧化有明显催化作用,可使氧化过电位降低550mV.NADH的电催化氧化遵循EC机理,催化反应步骤为速度决定步骤,其速度常数为3×10~3dm~3·mol~(-1)·S~(-1)。NNB在中性和弱碱性介质中的稳定性优于其它电子传递中间体,是有前途的电催化剂。     

含三苯胺聚希夫碱的三阶光学非线性极化率

设计合成并表征了新颖的具有三阶非线性光学性能的含有富电子结构单元的共轭聚希夫碱(PolySchiff base, PSB), 用Z-扫描技术研究了目标产物的三阶非线性特性, 测定了目标产物吡咯烷酮(NMP)溶液的三阶非线性折射率及非线性吸收率, 在波长为532 nm的Nd-YAG激光作用下, 得到非线性折射率n₂ = -1.23×10^-10 esu; Reχ⁽³⁾ = -3.06×10^-12 esu. 非线性吸收系数b = 3.63 10^-10 m/W, Imχ⁽³⁾ = 1.15 10^-11 esu, χ⁽³⁾ = 1.19 10^-11 esu, 在已知的材料中显示出较大的值. 由于n₂值为负数, PSB是自散焦材料. 表明PSB具有较强的三阶非线性光学性能, 有较大的应用前景. 用量子化学计算的方法对其电子结构, 前线分子轨道, χ⁽³⁾进行了理论计算, 并讨论了之间的关系.     

无机过氧化物的研究——Ⅲ.钨酸希土磷光体的均相合成

本文报道不用常规固相反应而自溶液中均相制备低聚态钨酸希土磷光体的方法,可能为磷光体的应用提供基础。     

Low-Temperature Heat Capacity and Thermal Decomposition of Crystalline[Ho（Thr）（H2O）5]Cl3

Rare earth elements have been widely used in many areas. Rare earth complex bearing an amino acid was synthesized to study the influence and the long-term effect of rare earth elements on environment and human beings,because amino acid is the basic unit of the living things. Previous work on these kinds of comidex is focused on synthesis and characterization of them. But thermodynamic data have seldom been reported. Here we present the thermod~nRmle study of [ Ho (Thr)(H20 )5]Cl3. The heat capecity of Holmium complex with threonine,[Ho(Thr)(H2O)5]Cl3,was measured with an automatic adiabatic calorimeter in the temperature range from 79K to 330K and no thermal anomaly was found in this range,Thermodynamic functions relative to standard state 298.15K were derived from the heat capactiy data.Thermal decomposition behavior of the complex in nitrogen atmosphere in the range from 300K to 900K was studied by thermogravimetric(TG) technique and a possible decompostion mechanism was proposed according to the TG-DTG results.