Phosphorescence of lyophilized complexes between cyclodextrins andβ-arylpropiophenones |
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Authors: | H. L. Casal J. C. Netto-Ferreira J. C. Scaiano |
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Affiliation: | (1) Division of Chemistry, National Research Council of Canada, K1A OR6 Ottawa, Ontario, Canada;(2) Present address: Departamento de Quimica, Universidade Federal Rural do Rio de Janeiro, CEP 23460 Rio de Janeiro, Brazil |
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Abstract: | -Arylpropiophenones do not phosphoresce in homogeneous solution as a result of excited state quenching by the -aryl group. In the presence of cyclodextrins the parent substrate, -phenylpropiophenone, shows readily detectable phosphorescence. The complexes show strong phosphorescence after lyophilization to dryness. The phosphorescence intensity of ring-substituted derivatives is strongly dependent upon molecular size and cavity dimensions, suggesting that the -arylpropiophenones can be used to probe these properties.Issued as NRCC-23907 |
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Keywords: | Cyclodextrins phosphorescence /content/r418003008078566/xxlarge946.gif" alt=" beta" align=" MIDDLE" BORDER=" 0" >-arylpropiophenones |
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