An incoherent quasi-elastic neutron scattering study on the dynamics of aqueous Cr<sup>3+</sup> perchlorate solutions
P S Salmon; G J Herdman; J Lindgren; M C Read; M Sandstrom; P S Salmon; Sch. of Phys., East Anglia Univ., Norwich, UK; G J Herdman; Sch. of Phys., East Anglia Univ., Norwich, UK; J Lindgren; Sch. of Phys., East Anglia Univ., Norwich, UK; M C Read; Sch. of Phys., East Anglia Univ., Norwich, UK; M Sandstrom; Sch. of Phys., East Anglia Univ., Norwich, UK
Журнал:
Journal of Physics: Condensed Matter
Дата:
1989-06-05
Аннотация:
The technique of high-resolution, incoherent quasi-elastic neutron scattering (IQENS) is applied to a 1.790 molal (mol kg<sup>-1</sup>) solution of Cr(ClO<sub>4</sub>)<sub>3</sub> at 26+or-1 degrees C. The results are consistent with a dynamic hydration number of six water molecules, each having a Cr<sup>3+</sup>-water-proton binding time described by the limit tau <sub>1</sub>>or approximately=5*10<sup>-9</sup> s. The results do not show a second shell of water protons in slow exchange with the cation, which implies a Cr<sup>3+</sup> to second-shell water-proton binding time that is <5*10<sup>-9</sup> s. Values for the water-proton translational self-diffusion coefficients are presented.
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