287483-75-4Relevant academic research and scientific papers
Energy-transfer mechanism in photoluminescent terbium(III) complexes causing their temperature-dependence
Katagiri, Shinya,Tsukahara, Yasunori,Hasegawa, Yasuchika,Wada, Yuji
, p. 1492 - 1503 (2007)
Photoluminescence of Terbium(III) complexes was investigated as a function of temperatures in the range of 80-280K for [Tb(bfa)3(H 2O)2] (bfa: 4,4,4-trifluoro-l-phenyl-l,3-butanedionato), [Tb(hfa)3(H2O)3] (hfa: hexafluoroacetyl- acetonato), [Tb(tfa)3(H2O)2] (tfa: trifluoroacetylacetonato), [Tb(acac)3(H2O)3] (acac: acetylacetonato), and [Tb(hfa)3-(tppo)2] (tppo: triphenylphosphine oxide). These complexes were classified into the two groups with different temperature-dependences. The first group consisting of [Tb(bfa)3(H2O)2], [Tb(tfa)3(H 2O)2], and [Tb(acac)3(H2O) 3] showed a dependence determined by the energy gap between the excited triplet state of the ligand and the emitting level of ter-bium(III) ion. In contrast, for [Tb(hfa)3(H2O)3] and [Tb(hfa)3(tppo)2] containing hfa as a ligand, not only the energy gap but also the energy barriers of the Forward energy transfer from the ligand to terbium(III) ion and Back energy transfer from terbium(III) ion to the ligand were taken into account for understanding their dependences. These results are discussed based on the re-orientation of the complexes accompanied by the forward and back energy transfer processes using DFT calculations.
Luminescent PMMA Films and PMMA@SiO2 Nanoparticles with Embedded Ln3+ Complexes for Highly Sensitive Optical Thermometers in the Physiological Temperature Range**
Mara, Dimitrije,Kaczmarek, Anna M.,Artizzu, Flavia,Abalymov, Anatolii,Skirtach, Andre G.,Van Hecke, Kristof,Van Deun, Rik
supporting information, p. 6479 - 6488 (2021/03/18)
In recent years, luminescent materials doped with Ln3+ ions have attracted much attention for their application as optical thermometers based on both downshifting and upconversion processes. This study presents research done on the development
