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A novel samarium material: Synthesis, structure, photophysical properties and photoluminescence energy transfer mechanism
Journal of Solid State Chemistry ( IF 3.2 ) Pub Date : 2018-09-28 , DOI: 10.1016/j.jssc.2018.09.040
Qiu-Yan Luo , Hui Luo , Han-Mao Kuang , Wen-Tong Chen , Yun-Xiang Wen

A novel samarium complex {[Sm(IA)3(H3O)2]2n}(2nHgCl4)(nHg2Cl5nH3O·3nH2O (1) (HIA = isonicotinc acid) has been synthesized under solvothermal condition and structurally characterized by single-crystal X-ray diffraction. It possesses a one-dimensional (1-D) chain-like structure. Solid-state photoluminescence measurement shows that it displays red light emission bands. The emission bands result from the characteristic emissions of the 4f electrons intrashell transitions of 4G5/2 → 6HJ (J = 5/2, 7/2, 9/2 and 11/2) of the samarium(III) ions. Energy transfer mechanism is explained by the energy level diagram of the samarium(III) ion and isonicotinic acid ligand. Complex 1 has a remarkable CIE chromaticity coordinate of (0.6182, 0.3813); so, it is a potential candidate for red light emitting materials for light emitting diodes (LEDs). Solid-state UV/Vis diffuse reflectance spectrum reveals that complex 1 has a wide optical band gap of 3.23 eV.



中文翻译:

新型sa材料:合成,结构,光物理性质和光致发光能量转移机理

新型sa络合物{[Sm(IA)3(H 3 O)2 ] 2 n }(2 n HgCl 4)(n Hg 2 Cl 5)· n H 3 O·3 n H 2 O(1)(HIA =异烟酸)是在溶剂热条件下合成的,并通过单晶X射线衍射对其结构进行了表征。它具有一维(1-D)链状结构。固态光致发光测量表明它显示红色发光带。发射带是由4 f的特征发射产生的电子shell离子的壳内跃迁为4 G 5/2  →  6 H JJ = 5 / 2、7 / 2、9 / 2和11/2)。sa(III)离子和异烟酸配体的能级图解释了能量转移的机理。配合物1具有显着的CIE色度坐标(0.6182,0.3813); 因此,它是用于发光二极管(LED)的红色发光材料的潜在候选者。固态UV / Vis漫反射光谱表明,配合物1具有3.23 eV的宽光学带隙。

更新日期:2018-09-28
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