全氟羧酸钕2,2’-联吡啶配合物的合成及其光学特性

合成了一系列全氟羧酸钕2,2’-联吡啶配合物:Nd(CF3COO)3.Dipy,Nd(C2F5COO)3.Dipy和Nd(C3F7COO)3.Dipy,并通过红外光谱、元素分析、热分析、紫外可见近红外吸收光谱和荧光光谱对其进行了表征。配合物的分解温度都高于260℃,最大失重温度超过340℃,说明它们具有良好的热稳定性。全氟羧酸的碳链长度和钕离子配位结构的差异,引起配合物的吸收跃迁强度的变化。根据紫外可见近红外吸收图谱,计算获得了Judd-Ofelt参数和受激辐射跃迁特性。配合物的受激发射面积分别为:3.63×10-20,2.36×10-20和1.49×10-20 cm2,可以和文献报道的无机材料媲美,它们将是非常有潜力的液体激光介质。

Synthesis and optical properties of Nd(III) perfluoro-carboxylate complexes with 2,2'-bipyridine

A series of neodymium complexes, Nd(CF3COO)3 x Dipy, Nd(C2F5 COO)3 x Dipy and Nd(C3F7COO)3 x Dipy were synthesized and characterized by FTIR spectra, elemental analysis, thermogravimetric analysis, UV-Vis-NIR absorption spectra and PL spectra. The decomposition temperature was found to be more than 260 C and maximum weight losses rates above 340 degrees C which indicate that they have good thermal stability. The low vibrational energy C-F bonds were used to replace the C-H bonds in organic group for improving the optical properties of materials. The length of carbon chain and the coordination structure of Nd(III) affect the absorption transition strength. According to the UV-Vis-NIR absorption spectra, the Judd-Ofelt parameters were calculated and the radiative properties were also presented. The stimulated emission cross-sections of the Nd(CF3COO)3 x Dipy, Nd(C2F5COO)3 x Dipy and Nd(C3FCOO)3 x Dipy were 3.63 x 10(-20), 2.36 x 10(-20) and 1.49 x 10(-20) cm2 respectively, which were as good as some reported inorganic materials. These complexes will be a series of promising materials for liquid laser application.