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  • 1 Shizuoka University Radiochemistry Research Laboratory, Faculty of Science 836 Ooya 422 Shizuoka-shi Japan
  • | 2 Tohoku University Institute for Materials Research 2-1-1 Katahira, Aoba-ku 980 Sendai-shi Japan
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Abstract  

The stability constants , of monochloride complex of Eu(III) in the tracer concentrations have been determined in the mixed system of dimethyl sulfoxide (DMSO) and water with 1.0 mol·dm−3 ionic strength using a solvent extraction technique. The values of decrease up to about 0.2 mole fraction of DMSO (Xs) in the mixed solvent system and then increase. Calculation of Eu3+−Cl distance using a Born-type equation of the Gibbs' free energy derived from the revealed that the estimated distance between Eu3+ and Cl (dEu−Cl) increases linearly withXs in 0≤Xs<0.043 and 0.043<Xs<0.172, but their slopes are different. The line in the first region means a linear enlargement of the thickness of the primary solvation sphere of Eu3+ with increasingXs. The larger slope againstXs in 0.043<Xs<0.172 is attributable to lowering of , based on the increase in the solvation number of the primary solvation sphere of Eu3+. The considerably large value ofdEu−Cl atXs=0.202 might result from lowering of by a coordination of ClO 4 into the secondary solvation sphere of Eu3+ and the extremely drop ofdEu−Cl atXs=0.276 might reflect on a conversion of the ion-pair type, i.e., the coexistence of two kinds of a solvent-shared ion-pair and a contact one by the appearance of the contact one.

Manuscript Submission: HERE

  • Impact Factor (2019): 1.137
  • Scimago Journal Rank (2019): 0.360
  • SJR Hirsch-Index (2019): 65
  • SJR Quartile Score (2019): Q3 Analytical Chemistry
  • SJR Quartile Score (2019): Q3 Health, Toxicology and Mutagenesis
  • SJR Quartile Score (2019): Q2 Nuclear Energy and Engineering
  • SJR Quartile Score (2019): Q3 Pollution
  • SJR Quartile Score (2019): Q3 Public Health, Environmental and Occupational Health
  • SJR Quartile Score (2019): Q3 Radiology, Nuclear Medicine and Imaging
  • SJR Quartile Score (2019): Q3 Spectroscopy
  • Impact Factor (2018): 1.186
  • Scimago Journal Rank (2018): 0.408
  • SJR Hirsch-Index (2018): 60
  • SJR Quartile Score (2018): Q2 Nuclear Energy and Engineering
  • SJR Quartile Score (2018): Q2 Pollution

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Journal of Radionalytical and Nuclear Chemistry
Language English
Size A4
Year of
Foundation
1968
Volumes
per Year
4
Issues
per Year
12
Founder Akadémiai Kiadó
Founder's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher
Chief Executive Officer, Akadémiai Kiadó
ISSN 0236-5731 (Print)
ISSN 1588-2780 (Online)