Change search
ReferencesLink to record
Permanent link

Direct link
A nuclear magnetic resonance study of dialkyldithiophosphate complexes: polycrystalline and surface adsorbed
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Sustainable Process Engineering.
2004 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

31P, 13C and 207Pb NMR were used to characterize different metal (Ni, Zn, Pb) dialkyldithiophosphate complexes. Eight different sodium or potassium dialkyldithiophosphate salts (alkyl groups R=ethyl-, n-propyl, iso-propyl, n- butyl, iso-butyl, sec-butyl, iso-amyl and cyclo-hexyl) were used as starting materials. The metal complexes studied are mononuclear, binuclear, tetranuclear or polynuclear and the structural diversity is reflected in different 31P chemical shifts and chemical shift aniostropies of the complexes. A correlation between the 31P chemical shift tensor principal value d22 and the S-P-S angle of the complexes was revealed. The ligands were also adsorbed on the surface of synthetic ZnS and PbS and studied by 31P CP/MAS NMR: spectra of the dry samples showed that in both cases chemisorption of the ligands on the mineral surfaces occured. The ligands chemisorbed on ZnS have a bridging coordination, while the coordination of the ligand to PbS is terminal. Products of oxidation and hydrolysis were also found on the mineral surfaces; disulfides were detected on the surface of ZnS and monothiophosphates and orthophosphates on the surface of PbS. After three months of storing of the PbS samples, more hydrolysis products were formed as well as precipitated lead(II) dithiophosphate complexes.

Place, publisher, year, edition, pages
Luleå: Luleå tekniska universitet, 2004. , 103 p.
Doctoral thesis / Luleå University of Technology 1 jan 1997 → …, ISSN 1402-1544 ; 2004:28
Research subject
Chemistry of Interfaces
URN: urn:nbn:se:ltu:diva-18274Local ID: 7bae6230-6f7e-11db-962b-000ea68e967bOAI: diva2:991281
Godkänd; 2004; 20061026 (haneit)Available from: 2016-09-29 Created: 2016-09-29Bibliographically approved

Open Access in DiVA

fulltext(2798 kB)8 downloads
File information
File name FULLTEXT01.pdfFile size 2798 kBChecksum SHA-512
Type fulltextMimetype application/pdf

Search in DiVA

By author/editor
Larsson, Anna-Carin
By organisation
Sustainable Process Engineering

Search outside of DiVA

GoogleGoogle Scholar
Total: 8 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Total: 5 hits
ReferencesLink to record
Permanent link

Direct link