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  • 1 Department of Analytical and Radiochemistry, University of Liège, Sart Tilman, B-4000 Liège, Belgium
  • | 2 Department of Radiochemistry, Institute of Nuclear Research, Dorodna 16, 03-195 Warsaw, Poland
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Abstract  

The thermodynamics of protonation of the lanthanide(III) chelates of trans-1,2-diaminocyclohexanetetraacetic acid (LnDCTA) was studied by potentiometric titration at the ionic strength of 1 (KCl). The protonation constants determined change monotonically and the double-double effect in the log K against Z variation is manifested in all four segments of the lanthanide series. The variations of the protonation enthalpy and entropy with Z are estimated to be also monotonical. The direction of the double-double effect observed indicates that the coordination number in the protonated chelates is higher by 1 in the entire series than in non-protonated chelates i. e. the protonation is accompanied by the coordination of the additional water molecule. The coordination number 10 is expected for the HLnDCTA chelates at least at the beginning of the series. Presumably the present conclusions are valid also for the LnEDTA system.

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)