Abstract
We have used optical and EPR spectroscopy to study the mechanisms for color center formation in nanoporous glasses, polymethylmethacrylate, and alcoholic solutions containing ?-diketonate molecules: Cu(hfac)2, Ba(hfac)2, Pr(hfac)3, and Eu(fod)3. We have observed and studied the complex structure of the absorption bands in the 300 nm region belonging to the intraligand π-π* transition. Analogous results were obtained when studying the photoluminescence spectra of 5D0 → 7F0 transitions of Eu3+ ions and the EPR spectra of Cu2+ ions in matrices doped with Cu(hfac)2. We propose a model according to which for β-diketonate molecules (except for basic diketonates), a hydrolyzed form exists that is formed during synthesis of the polycrystalline powder due to the presence of water molecules. The model allows us to explain the spectral manifestations of β-diketonates in different matrices.
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Translated from Zhurnal Prikladnoi Spektroskopii, Vol. 73, No. 4, pp. 447–452, July–August, 2006.
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Rybaltovskii, A.O., Gerasimova, V.I., Bogomolova, L.D. et al. Spectra of copper and europium β-diketonates in alcoholic solutions and transparent dielectrics. J Appl Spectrosc 73, 504–510 (2006). https://doi.org/10.1007/s10812-006-0109-x
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DOI: https://doi.org/10.1007/s10812-006-0109-x