Av. Veretlemarinier et al., HIGH-TEMPERATURE SPECTRAL HOLE-BURNING ON PORPHYRINS GRAFTED TO SOL-GEL MATRICES, Journal of luminescence, 64(1-6), 1995, pp. 223-229
Protoporphyrin IX is grafted by two chemical bonds to a rigid Si-O-Si
network prepared by using the sol-gel route. Efficient hole burning is
observed in hybrid organic-inorganic matrices. Persistent spectral ho
les are still burnt at 120 K.