Four new heteroleptic asymmetric fluorinated β-diketone based [Sm(fod)₃] adducts with organic ligands of different denticities (monodentate indazole and triphenylphosphine oxide (tppo), bidentate imidazolyl pyridine (impy) and tridentate trispyridyltriazine (tptz)) have been synthesized and characterized in order to examine the suitability of organic co-ligands as a sensitizer for Sm (III) luminescence. The photoluminescence of the complexes are studied in chloroform and solid state. The dominance of the hypersensitive transition ⁴G_5/2 → ⁶H_9/2 reflects the asymmetry around the Sm (III) ion in the present complexes which is supported by the large values of intensity ratio (R_Sm). The stark splitting in magnetic dipole ⁴G_5/2 → ⁶H_7/2 transition in the cases of eight coordinate [Sm(fod)₃(impy)] (3) and [Sm(fod)₃(tppo)₂] (4) complexes is similar. However, the splitting pattern of 3 and 4 is distinctively different from the nine- [Sm(fod)₃(tptz)] (1) and seven-coordinate [Sm(fod)₃(indazole)] (2) complexes. The intensity of the hypersensitive transition and stark splitting of magnetic dipole transition changes significantly upon change in the ligand environment around the Sm (III). The bright luminescence from these complexes reflects efficient energy transfer from the selected sensitizers to Sm (III) ion. It is worth mentioning that the lifetime for ⁴G_5/2 → ⁶H_9/2 transition of complex 3 in solid state is 269 μs which is higher than the lifetime of this transition noted for most of the tris(β-diketonate)Sm(III) reported so for. The emission colour from chloroform solution of [Sm(fod)₃(tppo)₂] (4) changes from parrot green to orange red upon change in excitation wavelengths. Of the selected sensitizers, the impy is most efficient since the emission from its complex is most intense.

合成了四种新的具有不同密度的有机配体的杂合不对称氟化β-二酮基[Sm（fod）₃ ]加合物（单齿吲唑和三苯基氧化膦（tppo），双齿咪唑基吡啶（impy）和三齿三吡啶基三嗪（tptz））。为了研究有机共配体作为Sm（III）发光敏化剂的适用性，进行了表征。在氯仿和固态下研究了配合物的光致发光。超敏跃迁⁴ G _5/2  →  ⁶ H _9/2的优势反映了本络合物中Sm（III）离子周围的不对称性，这由高强度比值（R _Sm）。在八个坐标[Sm（fod）₃（impy）]（3）和[Sm（fod）₃（tppo）₂ ]（）的情况下，磁偶极子⁴ G _5/2  →  ⁶ H _7/2跃迁发生了鲜明的分裂4）复合物是相似的。但是，3和4的分割模式与9- [Sm（fod）₃（tptz）]（1）和七坐标[Sm（fod）₃（indazole ）] （2）明显不同。复合体。超敏跃迁的强度和磁偶极跃迁的明显分裂会随着Sm（III）周围配体环境的变化而显着变化。这些配合物的明亮发光反映了从所选敏化剂到Sm（III）离子的有效能量转移。值得一提的是，复合物3在固态下⁴ G _5/2  →  ⁶ H _9/2跃迁的寿命为_269μs，高于大多数三（β-二酮酸）Sm记录的该跃迁的寿命。 （三）报道了。[Sm（fod）₃（tppo）₂ ]（4的氯仿溶液的发射颜色）在激发波长变化时从鹦鹉绿色变为橙红色。在所选的敏化剂中，impy的效率最高，因为其络合物的发射强度最大。