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Synthesis of hybrid materials by immobilizing para-aminobenzoic acid complexes of Eu 3+ and Tb 3+ in zeolite Y and their luminescent properties
Journal of Porous Materials ( IF 2.6 ) Pub Date : 2020-01-13 , DOI: 10.1007/s10934-019-00857-0
K. S. Ambili , Jesty Thomas

Two new lanthanide containing zeolite Y based luminescent hybrid materials were synthesized and characterized. Exchange of Na+ from zeolite Y with lanthanide ions (Eu3+ or Tb3+) was carried out by ultrasonication and annealing. Para-amino benzoic acid was introduced to the ion exchanged zeolite Y to form complex with the lanthanide ion. Characterizations of the materials were carried out using IR spectroscopy, PXRD, SEM, UV–Vis absorption spectroscopy, TG–DTA and DSC analysis. Luminescence properties of these materials were studied using photoluminescence spectroscopy. Complex formation inside the zeolite cage increased the luminescence efficiency of the lanthanide ions through antenna effect. Tb3+ containing hybrid material showed efficient energy transfer due to the optimal energy level matching of the triplet level of ligand and the emissive level of Tb3+. Zeolite Y structure acts as a protective barrier against the degradation of organic part as is evident from the high thermal stability of the materials.



中文翻译:

通过将Eu 3+和Tb 3+的对氨基苯甲酸配合物固定在沸石Y中来合成杂化材料及其发光性能

合成并表征了两种新型的含镧系元素的沸石Y基发光杂化材料。沸石Y中的Na +与镧系离子(Eu 3+或Tb 3+)的交换通过超声和​​退火进行。将对氨基苯甲酸引入到离子交换的沸石Y中以与镧系元素离子形成络合物。使用IR光谱,PXRD,SEM,UV-Vis吸收光谱,TG-DTA和DSC分析对材料进行表征。使用光致发光光谱法研究了这些材料的发光性质。沸石笼内的复合物形成通过天线效应提高了镧系元素离子的发光效率。Tb 3+由于配体的三重态能级与Tb 3+的发射能级的最佳能级匹配,含有杂合材料的材料表现出有效的能量转移。从材料的高热稳定性可以明显看出,Y型沸石结构可防止有机物降解。

更新日期:2020-01-13
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