大环硫杂冠醚与二价过渡金属（Cu，Co，Ni和Zn）的络合行为的电喷雾电离质谱研究。,Rapid Communications in Mass Spectrometry

当前位置： X-MOL 学术 › Rapid Commun. Mass Spectrom. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

大环硫杂冠醚与二价过渡金属（Cu，Co，Ni和Zn）的络合行为的电喷雾电离质谱研究。
Rapid Communications in Mass Spectrometry ( IF 1.8 ) Pub Date : 2012-09-08 , DOI: 10.1002/rcm.6352
Alexandra Tsybizova ₁ , Ján Tarábek , Michal Buchta , Petr Holý , Detlef Schröder

Affiliation

理由重金属既是环境问题，也是工业的重要资源。因此，它们通过有机配体的选择性提取是一个有吸引力的话题。通过电喷雾电离质谱（ESI-MS）和电子顺磁共振（EPR）的组合，研究了三种硫杂冠醚与晚期3d-金属离子的配位。方法质谱实验是在带有ESI源的离子阱质谱仪中进行的。通过与18-crown-6 / Na（+）的数据进行比较来估计绝对结合常数。EPR光谱用作研究Cu（I）/ Cu（II）氧化还原对的补充方法。结果研究发现，即使在过量的其他金属离子（Co（II），Ni（II）和Zn（II））下，硫杂皇冠醚也优先结合痕量的铜。Cu（I）配合物的绝对缔合常数约为10（8）M（-1），而其他3d-金属阳离子则低约两个数量级。EPR光谱表明，在形成[[thiacrown] Cu]（+）物种后，Cu（II）还原为Cu（I）发生在溶液中。结论ESI-MS表明，在低浓度和存在其他金属离子的情况下，所检测的三种噻唑酮配体具有较高的结合常数以及对铜（I）的良好选择性。通过ESI-MS和EPR光谱的结合，表明在溶液中从Cu（II）还原为Cu（I）。EPR光谱表明，在形成[[thiacrown] Cu]（+）物种后，Cu（II）还原为Cu（I）发生在溶液中。结论ESI-MS表明，在低浓度和存在其他金属离子的情况下，所检测的三种噻唑酮配体具有较高的结合常数以及对铜（I）的良好选择性。通过ESI-MS和EPR光谱的结合，表明在溶液中从Cu（II）还原为Cu（I）。EPR光谱表明，在形成[[thiacrown] Cu]（+）物种后，Cu（II）还原为Cu（I）发生在溶液中。结论ESI-MS表明，在低浓度和存在其他金属离子的情况下，所检测的三种噻唑酮配体具有较高的结合常数以及对铜（I）的良好选择性。通过ESI-MS和EPR光谱的结合，表明在溶液中从Cu（II）还原为Cu（I）。

"点击查看英文标题和摘要"

Electrospray ionization mass spectrometric investigations of the complexation behavior of macrocyclic thiacrown ethers with bivalent transitional metals (Cu, Co, Ni and Zn).

RATIONALE Heavy metals are both a problem for the environment and an important resource for industry. Their selective extraction by means of organic ligands therefore is an attractive topic. The coordination of three thiacrown ethers to late 3d-metal ions was investigated by a combination of electrospray ionization mass spectrometry (ESI-MS) and electron paramagnetic resonance (EPR). METHODS The mass spectrometric experiments were carried out in an ion trap mass spectrometer with an ESI source. Absolute binding constants were estimated by comparison with data for 18-crown-6/Na(+). EPR spectroscopy was used as a complementary method for investigating the Cu(I) /Cu(II) redox couple. RESULTS The study found that thiacrown ethers preferentially bind traces of copper even at an excess of other metal ions (Co(II), Ni(II), and Zn(II)). The absolute association constants of the Cu(I) complexes were about 10(8) M(-1), and about two orders of magnitude lower for the other 3d-metal cations. The EPR spectra demonstrated that the reduction from Cu(II) to Cu(I) upon formation of the [(thiacrown)Cu](+) species takes place in solution. CONCLUSIONS ESI-MS demonstrated that the three thiacrown ligands examined had high binding constants as well as good selectivities for copper(I) at low concentrations, and in the presence of other metal ions. By a combination of ESI-MS and EPR spectrometry it was shown that the reduction from Cu(II) to Cu(I) occurred in solution.

更新日期：2019-11-01

点击分享查看原文

点击收藏

阅读更多本刊新发论文本刊介绍/投稿指南