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Color tuning and violet light emission via coordination of pyrazole in tris(benzoyltrifluoroacetonate)Sm(III)
Optical Materials ( IF 3.8 ) Pub Date : 2024-01-18 , DOI: 10.1016/j.optmat.2024.114877
Farat Ali , Najmul Hasan , Shabir Ahmad Bhat , Rahat Ali , Syed Dilshad Alam , Arvind Kumar Jain , Shafat Ahmad Khan

The complex [Sm(btfa)3(H2O)2] was synthesized in 86.57 % yield. Such high yield of [Sm(btfa)3(H2O)2] complex has not been reported so far. Single crystal X-ray diffraction (SC-XRD) analysis demonstrates that [Sm(btfa)3(H2O)2] and [Sm(btfa)3(pz)2] (btfa = anion of 4,4,4-trifluoro-1-phenyl-1,3-propanedione and pz = pyrazole) complexes are octa-coordinated. According to the SHAPE v2.1 analysis, [Sm(btfa)3(H2O)2 has triangular dodecahedron geometry and [Sm(btfa)3(pz)2] complex has snub disphenoid geometry. Furthermore, elemental analysis, thermal analysis (TGA/DTG), and ATR-IR spectroscopy are used to characterize these synthesized complexes. The decay curve of 4G5/2 → 6H9/2 emission transition is fitted by a mono-exponential function for both complexes. The violet emission with a longer luminescence lifetime is observed from [Sm(btfa)3(pz)2] (69.78 ± 0.29 μs) which is more than ten times longer than the pink light emitter [Sm(btfa)3(H2O)2] (6.43 ± 0.08 μs). The quantum yield of solid samples was evaluated under ligand excitation by the absolute method using the integrating sphere. The absolute quantum yield of the violet light emitter complex (3.10 %) is seven times larger than the pink light emitter complex (0.44 %).

中文翻译:


通过吡唑在三(苯甲酰三氟乙酸盐)Sm(III)中的配位进行颜色调整和紫色发光



复合物 [Sm(btfa)3(H2O)2] 合成的收率为 86.57%。到目前为止,尚未报道如此高产量的 [Sm(btfa)3(H2O)2] 复合物。单晶 X 射线衍射 (SC-XRD) 分析表明,[Sm(btfa)3(H2O)2] 和 [Sm(btfa)3(pz)2](btfa = 4,4,4-三氟-1-苯基-1,3-丙二酮的阴离子和 pz = 吡唑)络合物是八位配位的。根据 SHAPE v2.1 分析,[Sm(btfa)3(H2O)2 具有三角形十二面体几何形状,[Sm(btfa)3(pz)2] 复合物具有短小蝶形几何形状。此外,元素分析、热分析 (TGA/DTG) 和 ATR-IR 光谱用于表征这些合成的复合物。4G5/2 → 6H9/2 发射跃迁的衰减曲线由两个配合物的单指数函数拟合。从 [Sm(btfa)3(pz)2] (69.78 ± 0.29 μs) 观察到具有较长发光寿命的紫色发射,比粉红色发光体 [Sm(btfa)3(H2O)2] (6.43 ± 0.08 μs) 长十倍以上。使用积分球在配体激发下通过绝对法评估固体样品的量子产率。紫色光发射器复合物的绝对量子产率 (3.10 %) 是粉红色光发射器复合物 (0.44 %) 的七倍。
更新日期:2024-01-18
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