the previous [Eu(hfa)3(DPEPO)] (hfa: hexafluoroacetylacetonate, dp = 228 °C). The photosensitized emission quantum yield Φπ–π* and photosensitized energy transfer efficiency ηsens of [Eu(ntfa)3(DPEPO)] (Φπ–π* = 45%, ηsens = 77%) are larger than those of [Eu(btfa)3(DPEPO)] (Φπ–π* = 38%, ηsens = 55%). The thermostable Eu(III) complex with a π-expanded system is expected to be useful for fabrication of LED
Synthesis and photo-physics of red emitting europium complexes: An estimation of the role of ancillary ligand by chemical partition of radiative decay rate
作者:Rashid Ilmi、Ashanul Haque、Muhammad S. Khan
DOI:10.1016/j.jphotochem.2018.10.042
日期:2019.2
β-diketone contributes 77 to 84% while tm-phen contributes 22 to 16% towards the Arad. The intramolecular energy transfer (WET) and back-energy transfer (WBT) rate are predicted from the singlet (S1) and triplet (T1) levels to the emissive 5D1 and 5D0 states for Eu(III) and follow the path S0 → S1 → T1 → 5D1 → 5D0 → 7F0,4. The complexes emit typical Eu(III) red emission with long luminescence lifetime (0
三种类型[Eu(β-diket。)3(tm-phen)]的高发光Eu(III)络合物,其中β-diket。=六氟乙酰丙酮(hfaa),btfa; 合成了4,4,4-三氟-1-苯基-1,3-丁二酮(btfa),2-壬基三氟丙酮(tta)和tm-phen = 3,4,7,8-四甲基-1,10-菲咯啉和特点。从理论上和实验上分析了配合物的详细光物理性质。使用LUMPAC程序[1]计算的理论光物理性质与实验结果非常吻合。Judd-Ofelt(JO)参数(Ω2 和 Ω4),计算并讨论了辐射(A rad)和非辐射(A nrad)衰减率。电偶极跃迁的辐射衰减率(A rad)的化学分配显示,β-二酮对A rad贡献77至84%,而tm-phen对A rad贡献22至16%。从单重态(S 1)和三重态(T 1)水平到Eu(III)的发射5 D 1和5 D 0状态,预测了分子内能量转移(W ET)和背能量转移(W
Utilization of a Pt(<scp>ii</scp>) di-yne chromophore incorporating a 2,2′-bipyridine-5,5′-diyl spacer as a chelate to synthesize a green and red emitting d–f–d heterotrinuclear complex
作者:Idris Juma Al-Busaidi、Rashid Ilmi、José D. L. Dutra、Willyan F. Oliveira、Ashanul Haque、Nawal K. Al Rasbi、Frank Marken、Paul R. Raithby、Muhammad S. Khan
DOI:10.1039/d0dt04198j
日期:——
The heteronuclear trimetallic d–f–d complex [Eu(btfa)3(Ph)(Et3P)2Pt–CC–R–CC–Pt(Et3P)2(Ph)}] has been synthesized and characterized spectroscopically. The complex displays both red and green emissions in solution.
Synthesis, characterization, and reversible oxygen binding of β-diketonate–Eu(III) complexes bearing anthracene
作者:Thi-Hien Dinh、Hung-Huy Nguyen、Minh-Hai Nguyen
DOI:10.1016/j.inoche.2019.107727
日期:2020.2
Abstract A series of β-diketonate–Eu(III) complexes with the general formula [EuX3L] X = benzoyltrifluoroacetonate (BTA), naphthoyltrifluoroacetonate (NTA); L = N,N-dimethyl-N′-(9-methylanthracenyl)ethylenediamine (L1), 1,2-bis[(anthracen-9-ylmethyl)amino]ethane (L2)} has were newly prepared and structurally elucidated by single crystal X-ray diffraction. The complexes displayed anthracene-based absorption
摘要 一系列β-二酮-Eu(III)配合物,通式为[EuX3L] X = 苯甲酰基三氟丙酮酸盐(BTA),萘酰基三氟丙酮酸盐(NTA);L = N,N-二甲基-N'-(9-甲基蒽基)乙二胺(L1), 1,2-双[(蒽-9-基甲基)氨基]乙烷(L2)}已被新制备并通过单一结构阐明晶体 X 射线衍射。该配合物显示出基于蒽的吸收带和微弱的红色发射,在与单线态氧 (1O2) 反应后发生显着变化。在室温下 1.5 小时后,内过氧化物 [EuX3L-EPO] 的强烈红色发射变得几乎无法辨认,使得 β-二酮酸盐-Eu(III) 复合物的氧结合可逆。
Luminescent PMMA Films and PMMA@SiO
<sub>2</sub>
Nanoparticles with Embedded Ln
<sup>3+</sup>
Complexes for Highly Sensitive Optical Thermometers in the Physiological Temperature Range**
作者:Dimitrije Mara、Anna M. Kaczmarek、Flavia Artizzu、Anatolii Abalymov、Andre G. Skirtach、Kristof Van Hecke、Rik Van Deun
DOI:10.1002/chem.202004951
日期:2021.4.12
coated with these PMMA films. The best performing PMMA film doped with Tb3+ and Eu3+ complexes was the PMMA[TbEuL1tppo]1 film (L1=4,4,4‐trifluoro‐1‐phenyl‐1,3‐butadionate; tppo=triphenylphosphine oxide), which showed good temperature sensing of Sr=4.21 % K−1 at 313 K, whereas for the PMMA films doped with Tb3+ and Sm3+ complexes the best performing was the PMMA[TbSmL2tppo]3 film (L2=4,4,4‐trifluoro‐