In this study, we synthesized two asymmetric rhodamine laser dyes based on 1-naphthol (Dye-1 and Dye-2) and investigated their photophysical and laser performances. It was found that the fluorescence emission wavelengths of the two dyes are successfully extended to the deep red region. Compared with Dye-1, the esterification product Dye-2 displays a redshift of ∼8 nm in the maximum absorption wavelength (λ_abs) and fluorescence emission wavelength (λ_em). In aprotic solvents, both λ_abs and λ_em of Dye-2 red-shift with the increase of solvent polarity, while its fluorescence quantum yield always decreases with the increase of solvent polarity, no matter in protic solvents or aprotic solvents. The results of laser tests indicated that both Dye-1 and Dye-2 have wide laser tuning range and strong laser conversion efficiency in the red region. The laser conversion efficiency is closely relative to the dye concentration and linearly increases with the increase of pump laser energy.

在这项研究中，我们合成了两种基于1-萘酚的不对称若丹明激光染料（Dye-1和Dye-2），并研究了它们的光物理和激光性能。发现两种染料的荧光发射波长成功地延伸至深红色区域。用染料1相比，该酯化产物染料-2显示器〜8纳米的最大吸收波长的红移（λ _ABS）和荧光发射波长（λ _EM）。在非质子溶剂，既λ _ABS和λ _EM染料2的红移随溶剂极性的增加而变化，而无论质子溶剂还是非质子溶剂，其荧光量子产率总是随溶剂极性的增加而降低。激光测试结果表明，Dye-1和Dye-2在红色区域均具有较宽的激光调谐范围和强大的激光转换效率。激光转换效率与染料浓度密切相关，并且随着泵浦激光能量的增加而线性增加。