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Positronium as a tool to monitor changes of chemical structure |
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| Authors: | A Vrtes K Süvegh M Bokor A Domjn T Marek B Ivn Gy Vank |
| Institution: | a Department of Nuclear Chemistry, Eötvös Loránd University, pob. 32, H-1518 Budapest, Hungary b Research Institute for Solid State Physics and Optics, Hungarian Academy of Sciences, pob. 49, H-1525 Budapest, Hungary c Chemical Research Centre, Hungarian Academy of Sciences, pob. 17, H-1525 Budapest, Hungary d Laboratory of Nuclear Techniques in Structural Chemistry, Hungarian Academy of Sciences, pob. 32, H-1518 Budapest, Hungary |
| Abstract: | The applicability of positron annihilation spectroscopy for chemical structural problems is demonstrated by two examples: For the swelling dynamics of an amphiphilic polymer network, very quick structural changes were indicated by positronium lifetime parameters at very low swelling ratios and a hydration mechanism was proposed accordingly. For the series FexZn1−x(propyltetrazole)6](BF4)2(x=1, 0.6, 0.4, 0.1, 0), changes in the dynamic structure were revealed by positronium lifetime spectroscopy. For compounds of x>0, temperature-induced spin-crossover was detected. |
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