Ionic Liquid-Porphyrin Concentrator for Effective Detection of Cu2+ Ions

JOURNAL OF CHEMICAL ENGINEERING OF JAPAN

Kai Li¹  Minoru Satoh¹  Takaomi Kobayashi¹ 

[1] Department of Materials Science and Technology, Nagaoka University of Technology

关键词: Copper Ion (Cu2+);    Ionic Liquids;    Porphyrin;    UV-vis;    Concentrator;   

DOI  :  10.1252/jcej.15we137

来源: Maruzen Company Ltd

【 摘 要 】

References(23)A facile method to determine the concentration of Cu2+ ions in aqueous solution was developed by using ionic liquids (ILs) as a concentrating reagent. Four hydrophobic ILs with the bis(trifluoromethanesulfonyl)imide counter anion were tested for their abilities to measure Cu2+ ion concentration. Results showed that 1-allyl-3-butylimidazolium bis(trifluoromethanesulfonyl)imide (ABIM) was good at concentrating Cu2+ ions in the form of [(TMPyP)Cu]4+, and thus the ABIM ILs only extracted [(TMPyP)Cu]4+ species from aqueous solution, whereas others showed no selectivity. In UV-vis absorption spectra, the Soret band absorbance of [(TMPyP)Cu]4+ in ABIM ILs was 17 times higher than that in water. Moreover, the band intensity increased linearly with increasing Cu2+ ion concentration. These results indicated that ABIM IL-TMPyPH2 (TMPyPH2: meso-tetrakis(N-methyl-pyridinium-4-yl)porphyrin) was an effective concentrator for Cu2+ ions. Interference studies showed that other metals (Cd2+, Zn2+, Fe3+, Mn2+, and Ni2+) did not interfere significantly with the determination of Cu2+ ion concentration using this method.

【 授权许可】

Unknown