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Statistical model of the localized electron in dilute ionic solutions |
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| Institution: | 1. Dresden Branch Lab, Fraunhofer Institute for Manufacturing Technology and Advanced Materials (IFAM), Winterbergstraße 28, 01277 Dresden, Germany;2. Institute of Materials Science, Dresden University of Technology, Helmholtzstr. 7, 01069 Dresden, Germany;1. Robotics Institute, Carnegie Mellon University, PA 15213, USA;2. Robotics Research Centre, Nanyang Technological University, 50 Nanyang Avenue, Singapore;3. Centre for Robotics Research, King''s College London, London, United Kingdom;4. University College London, United Kingdom |
| Abstract: | A theoretical model of the localized excess electron in dilute ionic solutions is presented. The model is based on the ion-pair theory of ionic solutions. The giant quasi-dipoles built of separated cation-anion pairs have been considered as electron traps. The statistical distribution of the depth of the electron traps and the optical absorption spectrum of the localized electron have been calculated. The trap distribution results from the statistical distribution of the distances separating two ionic partners of opposite charge and depends on the solvation degree of the ions. Numerical calculations of the electron absorption spectra have been performed for dilute NaX and LiX solutions (X stands for single-charged anion) in tetrahydrofuran at room temperature. |
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