Bis(2-ethylhexyl)phosphoric acid/bis(2-ethylhexyl)amine mixtures assolvent media for lithium-ions: A dynamical study

Vincenzo Turco Liveri, Cataldo Simari, Cesare Oliviero Rossi, Cesare Oliviero Rossi, Isabella Nicotera, Pietro Calandra

Risultato della ricerca: Article

8 Citazioni (Scopus)

Abstract

tThe self-diffusion coefficient, the spin-lattice relaxation times and ionic conductivity of lithium ions in liq-uid mixtures composed of bis(2-ethylhexyl)amine (BEEA) and bis(2-ethylhexyl)phosphoric acid (HDEHP)have been thoroughly investigated as a function of composition and temperature by NMR spectroscopyand conductometry. While the temperature and composition dependence of diffusion coefficients oflithium ions follow the same trend observed for those of the surfactant molecules, the spin-lattice relax-ation times of lithium ions and1H are remarkably different. The observed behavior has been interpretedin terms of lithium ions diffusion occurring through its association with the negatively charged HDEHPspecies, whereas its rotational dynamics being decoupled from that of surfactant molecules, gives T1val-ues lower than those of surfactant molecules and characterized by a different temperature dependence.
Lingua originaleEnglish
pagine (da-a)447-453
Numero di pagine7
RivistaCOLLOIDS AND SURFACES. A, PHYSICOCHEMICAL AND ENGINEERING ASPECTS
Volume489
Stato di pubblicazionePublished - 2015

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All Science Journal Classification (ASJC) codes

  • Surfaces and Interfaces
  • Physical and Theoretical Chemistry
  • Colloid and Surface Chemistry

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