Abstract
133Cs NMR spectroscopy was used to determine the stoichiometry and stability of the Cs + ion complex with dibenzo-21-crown-7 (DB21C7) in acetonitrile-dimethylsulfoxide (96.5:3.5, w/w) and nitromethane-dimethylsulfoxide (96.5:3.5, w/w) mixtures. A competitive 133Cs NMR technique was also employed to probe the complexation of Na +, K +, Rb +, Ag +, Tl +, NH 4 +, Mg 2+, Ba 2+, Hg 2+, Pb 2+ and UO 2 2+ ions with DB21C7 in the same solvent systems. All the resulting 1:1 complexes in nitromethane-dimethylsulfoxide were more stable than those in acetonitrile-dimethylsulfoxide solution. In both solvent systems, the stability of the resulting complexes was found to vary in the order Rb + > K + ≈ Ba 2+ > Tl + > Cs + > NH 4 + ≈ Pb 2+ > Ag + > UO 2 2+ > Hg 2+ > Mg 2+ > Na +.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
