In recent combined electron paramagnetic resonance and infrared spectroscopic studies a very specific interaction between surface OH groups and surface color centers was observed on nanometer-sized MgO particles. The positions of the respective OH stretching bands point to hydrogen bond-like interactions. On the other hand, the bandwidths indicate that the color center electron as proton acceptor is strongly localized.
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Diwald et al. (1999) studied this question.
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