On the lack of capillary Mossbauer spectroscopic effect for Sn-II-containing aqueous solutions trapped in corning Vycor 'thirsty' glass

Sammanfattning

Liquids trapped in the pores of certain silicate glasses (such as Corning Vycor 'thirsty' glass) were found to display frozen solutions like behavior at temperatures much higher than their actual freezing point. For example, recoilless gamma-resonance absorption was observed for Mossbauer active solutes such as Sn-119 and Fe-57 salts at room temperature (i.e., without the need of quenching). Thus capillary Mossbauer spectroscopy (CMS) proved to be a new and useful experimental tool with great potential in solution chemistry. As part of a research project concerned with the hydrolysis of Sn-II salts, we attempted to perform Sn-119 CMS measurements for solutions containing stannous ion in a range of aqueous environments. Somewhat surprisingly, we found that under ambient conditions, Sn-II aqueous liquid solutions, both the acidic and the basic systems, are essentially CMS-silent. This can be attributed to the strong temperature dependence of Lamb-Mossbauer factor of Sn-II species, which may result in the complete disappearance of Mossbauer pattern well below room temperature. These observations can also explain why previous publications concerned with the use of CMS dealt exclusively with Sn-IV and not with Sn-II containing liquids.

Nyckelord

Stannous ion; Aqueous solution; 'Thirsty' glass; Capillary Mossbauer spectroscopy

Publicerad i

Journal of Radioanalytical and Nuclear Chemistry
2014, Volym: 302, nummer: 1, sidor: 695-700
Utgivare: SPRINGER

UKÄ forskningsämne

Oorganisk kemi


Publikationens identifierare

DOI: https://doi.org/10.1007/s10967-014-3247-2

Permanent länk till denna sida (URI)

https://res.slu.se/id/publ/85897