Zwitterionic Guanidinium Compounds Serve as Electroneutral Anion Hosts
作者:Michael Berger、Franz P. Schmidtchen
DOI:10.1021/ja992028k
日期:1999.11.1
site suitable for strong interaction with negatively charged guests. An anionic moiety balancing the overall host charge to zero is incorporated in a way to prevent collapsing into an ion pair. Using bicyclic guanidinium anchor groups for direct guest binding and a closo-borane cluster as an anionic countercharge the ditopic zwitterionic host 17 was designed and prepared in a convergent synthetic scheme
The kinetics of the redox reactions of the peroxomonosulfate ion (HSO5−) with iron(II), vanadium(IV), cerium(III), chloride, bromide, and iodide ions were studied. Cerium(III) is only oxidized upon illumination by UV light and cerium(IV) is produced in a photoreaction with a quantum yield of 0.33 ± 0.03. Iron(II) and vanadium(IV) are most probably oxidized through one-electron transfer producing sulfate
Molten lithium sulphate—sodium sulphate—potassium sulphate eutectic: Reactions and absorption spectra of some lanthanides
作者:S.S.Al Omer、D.A. Habboush、I.Y. Isaac
DOI:10.1016/0040-6031(81)80178-5
日期:1981.11
Abstract The reactions of lanthanum(III) chloride, cerium(III) chloride and sulphate, cerium(IV) sulphate, praseodymium(III) chloride and sulphate and europium(III) chloride, in molten lithium sulphate—sodium sulphate—potassium sulphate eutectic, have been studied. Lanthanum(III) chloride and cerium(IV) and praseodymium(III) sulphates reacted as acids whereas cerium(III) chloride and sulphate and praseodymium(III)
Oxidation of Sulfur Dioxide in Sodium and Calcium Fluorides
作者:M. S. Ivanova、Yu. V. Savitskaya、M. V. Vishnetskaya、K. O. Tomskii
DOI:10.1134/s0023158421040030
日期:2021.7
Abstract It was established that the oxidation reactions of sulfur dioxide occur in aqueous solutions of sodium fluoride and in suspensions of calciumfluoride at room temperature and atmospheric pressure. It was found that the solutions of NaF and CaF2 can be repeatedly used after their regeneration with atmospheric oxygen.
Radiation mechanisms. Part I. Inorganic salts in aqueous solutions: electron spin resonance studies of γ-irradiated aqueous glasses containing oxyanions
作者:Ian S. Ginns、Martyn C. R. Symons
DOI:10.1039/dt9750000514
日期:——
Acidic, neutral, and alkaline aqueous glasses containing the anions perchlorate, chlorate, chlorite, perbromate, bromate, sulphate, sulphite, selenate, selenite, phosphate, hydrogen phosphite, and arsenate have been exposed to 60Co γ-rays at 77 K and their e.s.r. spectra recorded. Primary products detected include et–, ȮH(ȮD), ·H(D), ·O–, and in certain instances species formed from the oxyanions by