This paper deals with the optical and photophysical properties of dihydrophenanthro[9,10-e][1,2,4]triazine fluorescent dyes doped in Silicate based sol–gel and homo-poly methyl methacrylate (PMMA). Solid hosts were found to effect on the optical and photophysical parameters such as molar absorptivity, cross sections of singlet–singlet electronic absorption and emission spectra, excited state lifetime, quantum yield of fluorescence. The dipole moment of electronic transition, the length of attenuation and oscillator strength of electronic transition from S_o → S₁ have been calculated. The dyes were pumped with different powers using 3^rd harmonic Nd:YAG laser of 355 nm and pulse duration 8 ns, with a repetition rate at (10 Hz). Good photostability for compounds 1 and 2 were attained. It was decreased to 49% & 54% and 46% & 40% of the initial ASE of dyes in sol gel and PMMA, respectively, after 55,000 pumping pulses at (10 mJ/pulse). The dyes in sol–gel showed improved photostability compared with those in organic polymeric matrices.

本文讨论了掺杂在硅酸盐基溶胶-凝胶和均聚甲基丙烯酸甲酯 (PMMA) 中的二氢菲 [9,10-e][1,2,4] 三嗪荧光染料的光学和光物理性质。发现固体主体会影响光学和光物理参数，例如摩尔吸收率、单线态-单线态电子吸收和发射光谱的横截面、激发态寿命、荧光量子产率。计算了电子跃迁的偶极矩、衰减长度和电子跃迁的振子强度（S _o  → S _{1 ）}。使用355 nm 和脉冲持续时间 8 ns 的3^次谐波 Nd:YAG 激光器以不同的功率泵浦染料，重复率为 (10 Hz)。对化合物具有良好的光稳定性1和2已达到。在以 (10 mJ/脉冲) 进行 55,000 次泵浦脉冲后，它分别降低到溶胶凝胶和 PMMA 中染料初始 ASE 的 49% 和 54% 以及 46% 和 40%。与有机聚合物基质中的染料相比，溶胶-凝胶中的染料显示出更好的光稳定性。