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  • 1 Shizuoka University Radiochemistry Research Laboratory, Faculty of Science 836 Ogya 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, 1, of each monochloride complex of Nd(III) and Tm(III) have been determined in the mixed system of methanol and water with 1.0 mol·dm–1 ionic strength using a solvent extraction technique. The values of 1 of Nd(III) and Tm(III) increase as the mole fraction of methanol in the mixed solvent system (Xs) increases. However, the variation mode of 1 againstXs in the region of 0.00Xs0.40 differs from each other, a concave curve for the Nd(III) and a convex curve for the Tm(III). The LnCl2+ formed is present as a solvent-shared ion-pair. Since Cl is a structure breaking ion, it was assumed that the primary solvation sphere of Ln3+ directly contacted with Cl. Calculation of Ln3+–Cl distance using Bom-type equation revealed the followings: (1) for Tm3+ with coordination number 8, the estimated distance between Tm3+ and Cl increases linearly withXs in 0.00Xs0.40. The results mean an increase of the primary solvation sphere size of Tm3+ withXs. (2) For Nd3+, the distance between Nd3+ and Cl decreases linearly withXs in 0.00Xs<0.13, where both coordination numbers of 9 and 8 coexist, while it increases withXs in 0.13<Xs0.40. The results mean a decrease of the primary solvation-sphere size of Nd3+ withXs in 0.00Xs<0.13 and an increase of that withXs in 0.13<Xs0.40.

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  • 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)