期刊
MATERIALS CHEMISTRY AND PHYSICS
卷 190, 期 -, 页码 166-174出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.matchemphys.2017.01.024
关键词
MOFs; Lanthanides; Antenna effect; Photoluminescence; Microstructure
资金
- CNPq [407445/2013-7]
- PRONEX/FACEPE/CNPq [APQ-0675-1.06/14]
Metal Organic Frameworks (M0Fs) are hybrid materials, usually crystalline, consisting of metallic species or clusters, connected by polytopic organic ligands originating bi or tridimensional porous structures. In this work, Gd-1,4-BDC-MOFs doped with 5% mol Eu3+ were synthesized via solvothermal method at 180 degrees C. The effect of the synthesis time (3, 5 or 7 days) on the microstructure and photophysical properties of the obtained MOFs were evaluated. It was found that porous agglomerates were formed within three days, gradually changing their morphology to rod-like crystals within seven days. The photoluminescence excitation and emission spectra revealed an efficient energy transfer from the ligand to the Eu3+ levels (antenna effect), what is not expected for 1,4-BDC2- in a Eu(III)-based MOFs. We concluded that the presence of highly paramagnetic Gd3+ ions in the matrix enhanced the antenna effect, resulting in a strong red emission. (C)2017 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据