Structure of Aqueous Solutions of Acetonitrile Investigated by Acoustic and Positron Annihilation Measurements

• Authors: K. Jerie , A. Baranowski , S. Koziol , J. Gliński , A. Burakowski
• Languages of publication: EN

Abstracts

EN

We report the results of acoustic and positron annihilation measurements in aqueous solutions of acetonitrile (CH_3CN). Hydrophobicity of the solute is discussed, as well as the possibility of describing the title system in terms of hydrophobic solvation. The concept of Levay et al. of calculating the "ideal positronium lifetimes is applied, basing on the mean volume of cavities (holes) in liquid structure available for positronium pseudoatom. The same calculations performed using the Tao model of annihilation yield very different results. It can be concluded that either acetonitrile forms with water clathrate-like hydrates of untypical architecture, or it is too weak hydrophobic agent to form clathrate-like hydrates at all. The former interpretation seems to be more probable.

Keywords

EN

61.25.Em; 78.70.Bj

Discipline

• 78.70.Bj: Positron annihilation(for positron states, see 71.60.+z in electronic structure of bulk materials; for positronium chemistry, see 82.30.Gg in physical chemistry and chemical physics)
• 61.25.Em: Molecular liquids

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2005
• Volume: 107
• Issue: 5
• Pages: 826-831

Dates

published

2005-05

received

2004-09-20

Contributors

author

K. Jerie

• Institute of Experimental Physics, University of Wrocław, Borna 9, 50-205 Wrocław, Poland

author

A. Baranowski

• Institute of Experimental Physics, University of Wrocław, Borna 9, 50-205 Wrocław, Poland

author

S. Koziol

• Waters Corp., 34 Maple St., Milford, MA 01757, USA

author

J. Gliński

• Faculty of Chemistry, University of Wrocław, Wrocław, Poland

author

A. Burakowski

• Faculty of Chemistry, University of Wrocław, Wrocław, Poland

References

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Identifiers

DOI

10.12693/APhysPolA.107.826