Opto-acoustic study of tinuvin-P and rhodamine 6G in solid polymeric matrices

S. Nonell, C. Martí, I. García-Moreno, Á Costela, R. Sastre

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19 Cites (Scopus)


Laser-induced opto-acoustic calorimetry has been used to examine the thermo-elastic properties of two polymer matrices doped with tinuvin-P and the radiation-less decay processes of rhodamine 6G (Rh6G) in them. The matrices assayed were methyl methacrylate (MMA) homopolymers P(MMA), and methyl methacrylate and 2-hydroxyethyl methacrylate (HEMA) copolymers P(MMA: HEMA). A slight difference in the thermo-elastic properties of the polymers, namely their adiabatic expansion coefficients, has been detected and found to correlate with the long-term stability of the laser material. This suggests a key role of the heat-dissipation processes in the photostability of these polymeric materials. On the other hand, the fluorescence quantum yield of Rh6G is shown to vary with the polymer-matrix composition in a way consistent with its lasing efficiency. The Rh6G absorption and fluorescence quantum yield also change dramatically upon increasing its concentration, which suggests the co-existence of different Rh6G forms with different photophysical properties.

Idioma originalAnglès
Pàgines (de-a)355-360
Nombre de pàgines6
RevistaApplied Physics B: Lasers and Optics
Estat de la publicacióPublicada - 2001


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