Details
| Originalsprache | Englisch |
|---|---|
| Seiten (von - bis) | 10941-10947 |
| Seitenumfang | 7 |
| Fachzeitschrift | Dalton Transactions |
| Jahrgang | 41 |
| Ausgabenummer | 36 |
| Publikationsstatus | Veröffentlicht - 28 Sept. 2012 |
Abstract
Tetravalent thorium exhibits a strong tendency towards hydrolysis and subsequent polymerization. Polymeric species play a crucial role in understanding thorium solution chemistry, since their presence causes apparent solubility several orders of magnitude higher than predicted by thermodynamic data bases. Although electrospray mass spectrometry (ESI MS) identifies Th(iv) dimers and pentamers unequivocally as dominant species close to the solubility limit, the molecular structure of Th 5(OH) y polymers was hitherto unknown. In the present study, X-ray absorption fine structure (XAFS) spectroscopy, high energy X-ray scattering (HEXS) measurements, and quantum chemical calculations are combined to solve the pentamer structure. The most favourable structure is represented by two Th(iv) dimers linked by a central Th(iv) cation through hydroxide bridges.
ASJC Scopus Sachgebiete
- Chemie (insg.)
- Anorganische Chemie
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in: Dalton Transactions, Jahrgang 41, Nr. 36, 28.09.2012, S. 10941-10947.
Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review
}
TY - JOUR
T1 - Thorium nanochemistry
T2 - The solution structure of the Th(iv)-hydroxo pentamer
AU - Walther, Clemens
AU - Rothe, Jörg
AU - Schimmelpfennig, Bernd
AU - Fuss, Markus
PY - 2012/9/28
Y1 - 2012/9/28
N2 - Tetravalent thorium exhibits a strong tendency towards hydrolysis and subsequent polymerization. Polymeric species play a crucial role in understanding thorium solution chemistry, since their presence causes apparent solubility several orders of magnitude higher than predicted by thermodynamic data bases. Although electrospray mass spectrometry (ESI MS) identifies Th(iv) dimers and pentamers unequivocally as dominant species close to the solubility limit, the molecular structure of Th 5(OH) y polymers was hitherto unknown. In the present study, X-ray absorption fine structure (XAFS) spectroscopy, high energy X-ray scattering (HEXS) measurements, and quantum chemical calculations are combined to solve the pentamer structure. The most favourable structure is represented by two Th(iv) dimers linked by a central Th(iv) cation through hydroxide bridges.
AB - Tetravalent thorium exhibits a strong tendency towards hydrolysis and subsequent polymerization. Polymeric species play a crucial role in understanding thorium solution chemistry, since their presence causes apparent solubility several orders of magnitude higher than predicted by thermodynamic data bases. Although electrospray mass spectrometry (ESI MS) identifies Th(iv) dimers and pentamers unequivocally as dominant species close to the solubility limit, the molecular structure of Th 5(OH) y polymers was hitherto unknown. In the present study, X-ray absorption fine structure (XAFS) spectroscopy, high energy X-ray scattering (HEXS) measurements, and quantum chemical calculations are combined to solve the pentamer structure. The most favourable structure is represented by two Th(iv) dimers linked by a central Th(iv) cation through hydroxide bridges.
UR - http://www.scopus.com/inward/record.url?scp=84865682669&partnerID=8YFLogxK
U2 - 10.1039/c2dt30243h
DO - 10.1039/c2dt30243h
M3 - Article
AN - SCOPUS:84865682669
VL - 41
SP - 10941
EP - 10947
JO - Dalton Transactions
JF - Dalton Transactions
SN - 1477-9226
IS - 36
ER -