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合成了一系列吡喃鎓盐激光染料(P_1～P_8)。对它们的激光性能研究表明:新激光染料调谐范围为66～76nm,显著大于荧光素钠的文献值(29nm),与常用的优良激光染料罗丹明6G相比,激光能量转化率较接近,但调谐范围略宽,且光化学稳定性也很好。新激光染料(P_6)和香豆素4相混合后的混合染料,能够产生能量传递激光,且输出能量转化率(16.3%)高于单一染料(香豆素为12%,P_6为6.9%)。染料的Stokes位移与溶剂的参数之间满足Lippert方程,染料基态时的偶极矩小于激发态的偶极矩。所以新激光染料可用作绿光区激光染料。
A series of pyrylium salt laser dyes (P_1 ~ P_8) were synthesized. The laser performance of the new laser dyes shows that the tuning range of the new laser dyes is 66 ~ 76nm, which is significantly larger than the literature value of sodium fluorescein (29nm). Compared with the commonly used excellent laser dye Rhodamine 6G, the laser energy conversion rate is closer The tuning range is slightly wider and the photochemical stability is also good. The mixed dye with the new laser dye (P_6) and coumarin 4 can generate energy transfer laser, and the output energy conversion rate (16.3%) is higher than the single dye (coumarin 12%, P_6 6.9%). The Lippert equation is satisfied between the Stokes shift of the dye and the solvent parameters. The dipole moment of the dye in the ground state is smaller than the dipole moment of the excited state. So new laser dyes can be used as green laser dyes.