Highly dispersed magnesium oxide on silica exhibits photoluminescent emission. Evacuation of the sample at 1073 K promotes a solid–solid reaction, resulting in formation of a magnesium oxide species interacting with silica, which is the emission site of a new type of photoluminescence.
T. Tanaka, H. Yoshida, K. Nakatsuka, T. Funabiki and S. Yoshida, J. Chem. Soc., Faraday Trans., 1992, 88, 2297 DOI: 10.1039/FT9928802297
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