La(III),Nd(III)或Nd(III)-EDTA与酸性媒介黄GG的络合物稳定性

用pH电位法研究La(Ⅲ),Nd(Ⅲ)与酸性媒介黄GG(2-羟基-5-[(4-苯磺酸基)偶氮基]苯甲酸)体系及Nd(Ⅲ)-EDTA与酸性媒介黄GG混配体系在25℃及离子强度为0.1(NaNO_2)时的络合行为,并用SCOGS程序在IBM-PC计算机上计算体系中存在的各种络合质点的累积生成常数。还讨论了各络合质点形成的机理。     

2—乙酰基—乙酰苄胺与铕(III)和铽(III)配合物的合成及荧光性质研究

合成了一个新型β—二酮型配体,2—乙酰基—乙酰苄胺(L),以及它与铕(III)和铽(III)形成的配合物。分别在固态、乙醇、丙酮、氯仿及甲醇溶液中研究了配合物的荧光性质,并讨论了溶剂效应对配合物荧光强度的影响。     

Solvent extraction and recovery of Y(III) and Yb(III) from fluorspar mineral

Yttrium and ytterbium were extracted from sulfuric acid medium using triphenylarsine (TPAs) dissolved in kerosene. The influence of different factors, such as shaking time, extractants, metal ions, sulfate ion concentrations, as well as temperature, was studied in detail. From the slope analysis method and IR measurements, the structure of the extracted species was suggested as MSO₄(HSO₄)·TPAs, where M refers to Y(III) or Yb(III). The equilibrium constants (K_ex) and thermodynamic parameters, such as the change in enthalpy (ΔH), free energy (ΔG), and entropy (ΔS), were calculated. The method of extraction and stripping was applied to obtain the aforementioned metals from a sample of fluorspar mineral giving a recovery yield of 88.2% and 83.5% for yttrium and ytterbium, respectively.     

Modulation of active Cr(III) complexes by bath preparation to adjust Cr(III) electrodeposition

The preparation process of the Cr(III) bath was studied based on a perspective of accelerating the formation of active Cr(III) complexes. The results of ultraviolet-visible absorption spectroscopy (UV-Vis) and electrodeposition showed that active Cr(III) complexes in the bath prepared at room temperature in several days were rare for depositing chromium. The increase of heating temperature, time, and pH value during the bath preparation promoted the formation of active Cr(III) complexes. The chromium deposition rate increased with the concentration of active Cr(III) complexes increasing. Increasing the heating temperature from 60 to 96℃, the chromium deposition rate increased from 0.40 to 0.71 μm/min. When the concentration of active Cr(III) complexes increased, the grain size of Cr coatings increased, and the carbon content of the coating decreased. It is deduced that Cr(H₂O)₄(OH)L2+ (L is an organic ligand, and its valence is omitted) is a primary active Cr(III) complex.     

1-苯基-3-甲基-4-三氟乙酰基吡唑酮-(5)与Nd(III),Eu(III),Yb(III)的萃取平衡及络合物的合成和性质

在30℃及0.5mol·L(-1)NaNO_6条件下,测定了Nd(III),Eu(III),Yb((III)与1-苯基-3-甲基-4-三氟乙酰基吡唑酮-(5)(PMTFP)氯仿溶液体系的萃取平衡常数及萃合物的组成。用萃取法合成了Nd(III),Eu(III),Yb(III)与PMTFP的固体络合物,分析了它的组成,并通过它们的红外光谱和紫外光谱,探讨了络合物的结构。     

卫星导航定位系统（三）

介绍了欧盟与其他国家的合作和中国加入伽利略计划的情况，分析了印度加紧发展空间技术的情况。     

氯磺酚S两波长分光光度法测定铬（Ⅲ）和铝（Ⅲ）

在pH2.5～3.5的乙酸盐缓冲溶液中,在加热的条件下,氯磺酚S与铬(Ⅲ)和铝形成最大吸收在656.1nm和649.4nm的蓝色螯合物,吸收带重叠,光度测定时彼此干扰.当以参比波长λ_1=663.8nm,测定波长λ_2=648nm时测定铬,以λ_1=618.8nm和λ_2=678.0nm时测定,可用两波长分光光度法同时测定铬(Ⅲ)和铝,本文研究了显色反应的适宜条件,干扰离子的影响及消除方法.用于合成水样和废水中铬和铝的测定,得到了满意的结果.     

催化动力学光度法测量微量铑的研究

本文报道了酸性条件下微量钌对KIO_4氧化对硝基偶氮氯膦(CPA—PN)褪色具有显著的催化作用,并以此反应为指示反应建立了测定微量钌的催化光度法。此反应的最佳反应条件为:10.0ml溶液中含1mol/LH_2SO_41.0ml,0.1％对硝基偶氮氯膦0.40ml,1.0×10~(-2)mol/LKIO_41.00ml,沸水浴中加热5min,该方法的检测,限为0.01μg/10ml,钌的含量在0.01～0.30μg/10ml范围内符合比耳定律,此法应用于贵金属精矿中微量钌的测定,结果令人满意。     

贵州蕨类植物研究(III)

对《贵州蕨类植物志》的增补与修订。     

镧(Ⅲ)、铈(Ⅲ)与二元胺邻香草醛Schiff碱配合物的合成及其表征

本文报道了镧(Ⅲ)、铈(Ⅲ)与N,N’—亚乙基二(2—羟基—3—甲氧基苯甲亚胺)和N,N’,—邻亚苯基二(2—羟基—3—甲氧基苯甲亚胺)反应形成的固态配合物,通过元素分析、摩尔电导、红外光谱、电子光谱和热谱等研究了配合物的组成和性质。这些新配合物的组成可表示为:[LaL(H_2O)_2]NO_3和Ce_2L·nH_2O(L=MSEA或MSPA,n=0或4)。