Understanding the Dynamics of Eu³⁺ Ions in Room‐Temperature Ionic Liquids – Electrochemical and Time‐Resolved Fluorescence Spectroscopy Studies

Intense red emitting monoclinic LaPO4:Eu3+ nanoparticles: host–dopant energy transfer dynamics and photoluminescence properties

“…properties in a matrix is nicely presented by Werts et al, 47 and also by our group 11,12,48 Since the 5 …”

An efficient gel-combustion synthesis of visible light emitting barium zirconate perovskite nanoceramics: Probing the photoluminescence of Sm 3+ and Eu 3+ doped BaZrO 3

“…We wanted to the probe the site occupancy of Eu 3 þ and Sm 3 þ through time resolved photoluminescence spectroscopy. Eu 3 þ is often used as a structural probe [41][42][43][44][45][46][47], because of the (a) relative simplicity of its energy-level structure and the fact that it possesses non-degenerate ground ( 7 F 0 ) and excited ( 5 D 0 ) states and (b) absorption and emission spectra of this ion show marked dependence on its site symmetry in the host material.The orange emission (590-600 nm) of Eu 3 þ due to the magnetic dipole transition (MDT) 5 D 0 -7 F 1 is not affected much by the site symmetry, because they are parity-allowed, while the red emission ( $ 610-630 nm) due to the electric dipole transition (EDT) of 5 D 0 -7 F 2 , being hypersensitive, is affected by the site symmetry of Eu 3 þ ion. In a crystal site inversion symmetry the EDT are strictly forbidden and the MDT are usually the dominant emission line.…”

Electrochemical and Spectroscopic Study of EuIII and EuII Coordination in the 1‐Ethyl‐3‐methylimidazolium Bis(trifluoromethylsulfonyl)imide Ionic Liquid

“…[12][13][14][15] Specifically,E u II can be stabilized in aqueous solutions thanks to cyclic ligands such as cryptands or analogues [16] whereasi nn onaqueousm edia, fully dissolved stablef orms of Ln II can be observed. [17,18] The electrochemical behavior of the Eu III /Eu II redoxc ouple was extensively studiedi nawide range of IL [14,[19][20][21][22][23][24][25][26][27] and its apparent standard potential was found to vary between0and À1.0 Vv ersus ferrocenium/ferrocene (Fc + /Fc) reference, depending on the medium. However,t he stabilization of Eu II in these solvents as compared to aqueous solutionsi sp oorly explained in the literature.…”

“…[19,[29][30][31] In these solids, NTf 2 coordination modes and hydration numbersw idely depend on the compound, the synthesis conditions, and the Ln III ionic radii. However,v ery few studies were found on the coordination of Eu III by anions from room temperature IL (RTIL) [25,26,32] and even fewer on the coordinationofEu II . [15] This study aims to understand the electrochemical behavior of the Eu III /Eu II redox couple in 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide (hereafter referred to as [EMIm][NTf 2 ]).…”