Sol–gel prepared AlPO4 with incorporating Rhodamine 6G

Rhodamine 6G (RH6G) laser dye-doped AlPO 4 xerogel and glass were prepared via a simple sol-gel route by one-step process and two-step process, respectively. The aggregating behavior of dyes in xerogel and glass was studied by excitation and emission spectra. The results indicated the dye aggregates become significantly weak in AlPO 4 glass than in xerogel, which might be attributed to the enhanced interactions between dye and AlPO 4 network as well as the nano-scale separation of dye by the mesoporous structure of AlPO 4 glass. The 27 Al MAS NMR of AIP0 4 glass confirms the interaction of RH6G with AlPO 4 glass network. Incorporation of RH6G into AIP0 4 glass converts Al(4) to Al(6) units, resulting in the increase of Al(6) concentration with the doped RH6G concentration.