硫酸根阴离子对HPMBP及TOA协同萃取镨(Ⅲ)及钕(Ⅲ)的影晌

本文研究了硫酸根阴离子对1-苯基-3-甲基-4-苯甲酰基吡唑酮-5(HPMBP,HL)及三辛胺(TOA)协同萃取镨(Ⅲ)及钕(Ⅲ)的影响。发现在SO_4~(2-)体系中协萃机理为:(LnL_3)_o+(HTOAL)_o(HTOA~+LuL_4~-)_o及(HLnL_4)_o+(TOA)_o(HTOA~+LnL_4~-)_o式中Ln~(3+)=Pr~(3+),下标“o”指示有机相中物种,无下标指示水相中物种。固体萃合物的红外光谱及元素分析数据确证了上述机理。     

新铜试剂—曙红Y萃取光度法测定微量铜

铜(I)-新铜试剂(NCP)-曙红Y(Eosin Y)能形成离子对三元络合物,其络合比为1:2:1。在氯仿中该络合物的λ_(max)=544nm,表观摩尔吸光系数ε=6.83×10~4 L mol~(-1)cm~(-1)。以柠檬酸盐作掩蔽剂,控制水相pH=4.5,相比(水相/氯仿)=2/1,可将络合物定量萃入氯仿中。一般常见的共存离子均不干扰测定,显色稳定性好,线性范围为0～5μg cu/5ml氯仿。方法灵救度高,选择性好。     

ZnCuCoAlNO3型四元水滑石及其多氧阴离子柱撑物的合成与催化氧化性能

Anionic clay, ZnCuCoAlNO₃ and its polyoxometalate intercalates were synthesized, and were characterized by XRD, IR, ³¹PMAS NMR, DTA and elemental analysis. The pillared products are found to be effective catalysts for oxidation of cyclohexene with molecular oxygen under mild reaction conditions     

3,5-二溴水杨醛缩氨基吡啶的合成及其应用于萃取荧光法测定微量季铵盐

本文合成了新荧光试剂3，5-二溴水杨醛缩氨基吡啶，用元素分析、红外光谱证实了新化合物的结构。并且将此试剂用于萃取荧光法测定水中微量季铵盐。研究了反应条件．探讨了反应机理。所提出的方法灵敏度好，干扰少。     

7-十二烯基-8-羟基喹啉的合成

7-十二烯基-8-羟基喹啉是一种新型螯合型萃取剂(Kelex 100的主要成份)。它是(1a)和(1b)异构体的混合物。本文报道了利用1-氯-1,1,3,3-四甲基丁烷与过量丁二烯-[1,3]的1,4加成反应合成重要中间体1-氯-5,5,7,7-四甲基辛烯-[2](3)的方法,此法具有室温、常压、产率高、设备简单、操作方便等优点。     

手性配体立体选择性萃取分离扁桃酸对映体

Based on chiral ligand exchange, the distribution behavior of mandelic acid enantiomers in the two-phase system containing copper ion(Ⅱ)(Cu²⁺) and N-n-dedecane-L-hydroxyproline (L), was studied. At different pH, the partition of Cu²⁺ in the two-phase system containing N-n-dedecane-L-hydroxyproline, was investigated. The formation constant of binary cpmplex(Li₂Cu) was obtained by regression. The influence of pH, concentrations of Cu²⁺ and chiral ligand, and solvents on partition coefficients(K) and separation factor(α), was discussed. The experimental results show that Li forms more stable ternary complex with D-mandelic acid than with L- mandelic acid. There is a large influence of pH on K and α. At low pH values (<3.5), formation of binary complexes is thermodynamically unfavourable. K and α are best when pH values are above 3.5 and the molar ratio of chiral ligand to Cu²⁺ is 2∶1. At the same time, solvents influence K and α very much.     

Cyanex 923-H2SO4体系萃取第3相的形成和应用

三相体系;Cyanex 923-H2SO4体系萃取第3相的形成和应用