Abstract
In the present work, we synthesized two seminaphthorhodafluor red laser dyes SNARF-X1 and SNARF-X2 and investigated their photo-physical properties in different solvents and the laser properties in ethanol. It was found that the wavelengths of absorption and fluorescence emission spectra are not very sensitive to the solvent polarity, while the fluorescence intensities decrease with the increase in solvent polarity. SNARF-X1 and SNARF-X2 not only emit tunable red laser (590–670 nm for SNARF-X1 and 600–680 nm for SNARF-X2) but also show high laser conversion efficiency. The above two dyes also show high photo-stability under 532 nm ND:YAG laser irradiation. In this regard, the half-lives of laser efficiency for SNARF-X1 and SNARF-X2 are 7 h and 6 h, respectively.
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