Synthesis, characterization and use of imidazole and methyl-pyrazole based pyridine ligands as extractants for nickel(II) and copper(II)
作者:Brendan H. Pearce、Hezron F.O. Ogutu、Waheed Saban、Robert C. Luckay
DOI:10.1016/j.ica.2019.02.020
日期:2019.5
solvent extraction of only Ni(II) in the absence of synergist produced values from 3% to 15% and values between 69% and 79% with synergist. The competitive extraction of metal ions from a base metal ion mix (Co2+, Ni2+, Zn2+, Cu2+, Pb2+ and Cd2+) produced extraction values of 15%−87% extraction of different metal ions with synergist. Finally, time dependent extraction studies with Ni(II) showed that
摘要这项工作包括合成七个基于吡啶的配体,2-(3-丁基-1H-吡唑-5-基)-吡啶(1),2- [3-(叔丁基)-1H-吡唑-5 -基]-吡啶(2),2-(3-辛基-1H-吡唑-5-基)-吡啶(3),2-(1-辛基-1H-咪唑-2-基)吡啶(4), 2-[((1H-吡唑-1-基)甲基]吡啶(5),2-[((3,5-二甲基-1H-吡唑-1-基)甲基]吡啶(6)和2-[(3-甲基-1H-吡唑-1-基)甲基]吡啶(7)。在大多数情况下,我们修改了一些路线并提高了产量。适当地使用1 H和13 C NMR,红外(IR)光谱,质谱(ms),元素分析(EA)和熔点对配体进行了全面表征。我们设法生长了2-[((1H-吡唑-1-基)甲基]吡啶高氯酸铜(II)络合物的单晶,并使用单晶X射线衍射解决了该结构。围绕铜(II)中心的配位是伪正方形平面,具有两个与金属离子配位的配体。迹象表明,使用该配体对铜(II)的