Sakr Mahmoud A S, Abdel Gawad Sayed A, Abou Kana Maram T H, Ebeid El-Zeiny M
Chemistry Department, Faculty of Science, Tanta University, Tanta, Egypt.
Misr University for Science and Technology (MUST), 6th of October City, Egypt.
J Fluoresc. 2017 Jul;27(4):1267-1275. doi: 10.1007/s10895-017-2058-6. Epub 2017 Mar 13.
This article reports the optical properties such as absorption profile, molar absorptivity, fluorescence profile and photo-physical parameters such as dipole moment, oscillator strength, fluorescence quantum yields, fluorescence lifetimes, laser performance and finally photostability of 2,5-Bis(5-tert-butyl-benzoxazol-2-yl)thiophene (BBOT),1,4-Bis(5-phenyl-2-oxazolyl)benzene (POPOB), 5-diphenyel-oxazole (PPO) laser dyes in different restricted hosts. (BBOT), (POPOB) and (PPO) are embedded in transparent silica-based nanoporous sol-gel glass and copolymer matrix of methyl methacrylate (MMA) and 2-hydroxyethyl methacrylate (HEMA). The absorption and fluorescence properties of these laser dyes in sol-gel glass matrices are compared with their respective properties in copolymer host. In case of sol-gel matrix, all dyes had higher quantum yields as well as lasing wavelength maxima. The laser performances as well as the photostability of these laser dyes in sol-gel glass displayed senior behavior compared with (MMA/ HEMA) copolymer samples upon using nitrogen laser (337.1 nm) as pumping energy.
本文报道了2,5-双(5-叔丁基-苯并恶唑-2-基)噻吩(BBOT)、1,4-双(5-苯基-2-恶唑基)苯(POPOB)、5-二苯基恶唑(PPO)激光染料在不同受限主体中的光学性质，如吸收光谱、摩尔吸光率、荧光光谱以及光物理参数，如偶极矩、振子强度、荧光量子产率、荧光寿命、激光性能，最后还报道了其光稳定性。(BBOT)、(POPOB)和(PPO)被嵌入到透明的二氧化硅基纳米多孔溶胶-凝胶玻璃以及甲基丙烯酸甲酯(MMA)和甲基丙烯酸2-羟乙酯(HEMA)的共聚物基质中。将这些激光染料在溶胶-凝胶玻璃基质中的吸收和荧光性质与其在共聚物主体中的相应性质进行了比较。在溶胶-凝胶基质的情况下，所有染料都具有更高量子产率以及最大激射波长。当使用氮激光(337.1 nm)作为泵浦能量时，这些激光染料在溶胶-凝胶玻璃中的激光性能以及光稳定性与(MMA/HEMA)共聚物样品相比表现更优。
