کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7905942 | 1510750 | 2018 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Eu3+ or Sm3+-Doped terbium-trimesic acid MOFs: Highly efficient energy transfer anhydrous luminophors
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
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چکیده انگلیسی
[Tb(TMA):RE3+] MOFs (MOF: Metal Organic Framework; TMA: trimesic acid or 1,3,5-benzenetricarboxylic acid, RE3+: Eu and Sm) with tunable color were synthesized by aqueous coprecipitation method. Using a chemical artifice, lanthanide cationic radius contraction, it was possible to obtain only anhydrous MOFs, a very important characteristic in luminescent compounds. TMA3â anions triplet states present higher energy levels compared to the main emitting states of Eu3+ (5D0), Tb3+ (5D4) and Sm3+ (4G5/2), supplying an efficient antenna effect. Based on the spectroscopic investigation, i.e. excitation/emission spectra and lifetimes of the excited states, the material shows a high quantum efficiency (ηâ¯=â¯83-86%) due to the very efficient energy transfer process TMAâTbâEu, combined to the presence of this high energy absorption ligand and the absence of water molecules.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Optical Materials - Volume 84, October 2018, Pages 123-129
Journal: Optical Materials - Volume 84, October 2018, Pages 123-129
نویسندگان
I.G.N. Silva, C.S. Cunha, A.F. Morais, H.F. Brito, D. Mustafa,