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Bidimensional Solvation and Delocalisation of Electrons at the Surface of an Insulating Oxide: The Role of Surface Hydroxyl Groups on MgO
Author(s) -
Chiesa Mario,
Paganini Maria Cristina,
Giamello Elio
Publication year - 2004
Publication title -
chemphyschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.016
H-Index - 140
eISSN - 1439-7641
pISSN - 1439-4235
DOI - 10.1002/cphc.200400466
Subject(s) - electron paramagnetic resonance , solvation , surface (topology) , chemistry , electron , oxide , photochemistry , radical , molecule , organic chemistry , nuclear magnetic resonance , physics , geometry , mathematics , quantum mechanics
Surface electron tuning : Combined EPR and UV/Vis‐NIR spectroscopic studies bring evidence for excess electron delocalisation at the surface of MgO as a function of hydroxyl coverage (see picture). The presence of surface hydroxyl groups induces domains of interacting paramagnetic centres on the surface of MgO providing a way of tuning the degree of electron delocalisation on the surface.