scholarly journals Influence of Different Carboxylic Acid Ligands on Luminescent Properties of Eu(Lc)3phen (Lc = MAA, AA, BA, SA) Complexes

2013 ◽  
Vol 2013 ◽  
pp. 1-8 ◽  
Author(s):  
Jing Zhang ◽  
Le Zhang ◽  
Yan Chen ◽  
Xiaogu Huang ◽  
Lixi Wang ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Rare Earth ◽  
Carboxylic Acid ◽  
Luminescent Properties ◽  
High Thermal Stability ◽  
Photoluminescence Spectra ◽  
Europium Complexes ◽  
Absorption Intensity ◽  
Uv Absorption Spectra ◽  
The Eu

A series of rare earth europium complexes with different carboxylic acid ligands Eu(Lc)3phen (Lc = MAA, AA, BA, SA) were synthesized. The complexes were characterized by FTIR, TG-DSC, XRD, UV absorption spectra, and photoluminescence spectra (PL) to study the structure, thermal stability, the energy absorption, and luminescent properties of the complexes. The results showed that the series complexes are all with good crystallization and relatively high thermal stability. The differences of the luminescent properties of complexes are caused by the different ligand structures. The absorption intensity of the carboxylic acid ligands, BA, was the strongest, followed by the MAA and AA and SA was the weakest. Therefore, the fluorescence intensity of the Eu(BA)3phen was the strongest, followed by the Eu(MAA)3phen and Eu(AA)3phen and the Eu2(SA)3phen2was the weakest. All complexes showed good luminescence properties.

Synthesis, Spectral Characterization and Luminescent Properties of Ternary Rare Earth Nitrates Complexes with 2-Acetylpyridine-tris(2-aminoethyl)amine and Pyridine-N-oxide Ligand

2011 ◽  
Vol 322 ◽  
pp. 337-340
Author(s):  
Lian Cai Du
Keyword(s):  
Thermal Analysis ◽  
Rare Earth ◽  
Luminescent Properties ◽  
Ternary Complexes ◽  
Molar Conductivity ◽  
Lanthanide Ions ◽  
Fluorescent Properties ◽  
Tripodal Ligand ◽  
Rare Earth Nitrates ◽  
The Eu

A tripodal ligand, 2-acetylpyridine-tris(2-aminoethyl)amine (L), pyridine-N-oxide and their ternary complexes with rare earth nitrates have been synthesized. These new complexes with the general formula of Ln·L·PyNO·(NO3)3·nH2O (where Ln = La, Nd, Tb, Pr, Eu, n = 1~3 ) were characterized by elemental analysis, IR spectra, thermal analysis and molar conductivity. All the complexes are stable in air. The results show that the lanthanide ions in each complex are coordinated by nitrogen atoms of the ligand, oxygen atoms of PyNO and the nitrates. The fluorescent properties of the Eu(III) and Tb(III) complexes in solid were investigated.

Achieving high thermal stability of different rare-earth ions in a single matrix host via the manipulation of the local structure by a solid solution

2020 ◽  
Vol 22 (28) ◽  
pp. 16294-16300
Author(s):  
Xiuxia Yang ◽  
Lei Zhao ◽  
Zhichao Liu ◽  
Shuyu Tian ◽  
Hao Zhang ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Solid Solution ◽  
Rare Earth ◽  
Local Structure ◽  
Local Environment ◽  
High Thermal Stability ◽  
Rare Earth Ions ◽  
Single Matrix ◽  
Thermal Stability Of

Manipulating the local environment of CAS by substitution of Al3+–Y3+ for Si4+–Ca2+ to achieve more stability in the structure of CYA.

Effect of Ligands on Luminescent Properties of Rare Earth Europium Complexes

2021 ◽  
Vol 218 (1) ◽  
pp. 35-42
Author(s):  
Qinyi Li ◽  
Peisong Tang ◽  
Ruipeng Hou ◽  
Yifan Zhou ◽  
Haifen Chen
Keyword(s):  
Rare Earth ◽  
Luminescent Properties ◽  
Europium Complexes

Novel luminescent properties and thermal stability of non-rare-earth Ca-α-sialon:Mn2+ phosphor

2018 ◽  
Vol 202 ◽  
pp. 514-522 ◽  
Author(s):  
Jia Ni ◽  
Qian Liu ◽  
Jieqiong Wan ◽  
Guanghui Liu ◽  
Zhenzhen Zhou ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Rare Earth ◽  
Luminescent Properties ◽  
Thermal Stability Of

Epitaxial Coordination Assembly of Semi-conductive Silver-chalcogenide Layer-based MOF

2022 ◽  
Author(s):  
Chun-Hua Gong ◽  
Xiaozong Hu ◽  
Zhen Han ◽  
Xiao-Fei Liu ◽  
Min-Zi Yang ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Carboxylic Acid ◽  
Three Dimensional ◽  
High Thermal Stability ◽  
Temperature Dependent ◽  
Silver Chalcogenide ◽  
Chalcogenide Layer

Using carboxylic acid linker, this work achieved the epitaxially coordination assembly of the Ag−S layer into three-dimensional semi-conductive framework, with high thermal stability, as well as interesting temperature-dependent luminescence response....

Structural and luminescent properties of red-emitting Eu3+-doped ternary rare earth antimonates R3SbO7 (R = La, Gd, Y)

2014 ◽  
Vol 2 (28) ◽  
pp. 5559-5569 ◽  
Author(s):  
Jing Wang ◽  
Yu Cheng ◽  
Yanlin Huang ◽  
Peiqing Cai ◽  
Sun Il Kim ◽  
...  
Keyword(s):  
Rare Earth ◽  
Luminescent Properties ◽  
Luminescence Spectra ◽  
The Eu

Eu3+-doped antimonates show distinct luminescence spectra. 5D0 → 7F4, 5D0 → 7F1 and 5D0 → 7F0 are the dominant transitions for Eu3+-doped La3SbO7, Gd3SbO7 and Y3SbO7 respectively, due to different microstructures around the Eu3+ ions in the lattices.

Synthesis and Luminescent Properties of Doped Europium Complexes with 2, 3 - Pyrazine Dicarboxylate

2012 ◽  
Vol 476-478 ◽  
pp. 1202-1205
Author(s):  
Kai Kong ◽  
Hai Xia Zhang ◽  
Huan Huan Li ◽  
Juan Pang ◽  
Ying Nan Chen ◽  
...  
Keyword(s):  
Rare Earth ◽  
Metal Ions ◽  
Dicarboxylic Acid ◽  
Fluorescence Spectra ◽  
Fluorescence Enhancement ◽  
Luminescent Properties ◽  
Luminous Intensity ◽  
Europium Complexes ◽  
Edta Titration ◽  
Elemental Analyses

Eleven europium complexes doped other metal ions with 2,3 - pyrazine dicarboxylic acid had been synthesized and characterized by elemental analyses, rare earth EDTA titration, IR, UV and fluorescence spectra. They were EuL1.5•5H2O, Eu0.5Ln0.5 L1.5•5H2O (Ln3+=La3+, Y3+, Gd3+), EuML2.5•8H2O (M2+= Mg2+, Ca2+, Sr2+, Ba2+, Co2+, Ni2+, Zn2+). Doped metal ions could enhanced the fluorescence of Eu3+ complex, and the order of the fluorescence enhancement was Zn2+>La3+>Gd3+>Y3+; Mg2+> Sr2+>Ca2+>Ba2+. And doped with Co2+ and Ni2+ made the Eu3+ luminescence quenched, which the luminous intensity was almost zero.

Triboluminescence of Rare-Earth-Doped Aluminosilicates and Its Application to Sensing of Structural Damage

1999 ◽  
Vol 604 ◽  
Author(s):  
Katsuhisa Tanaka ◽  
Tsuguo Ishihara ◽  
Koji Fujita ◽  
Kazuyuki Hirao
Keyword(s):  
Rare Earth ◽  
Structural Damage ◽  
Local Environment ◽  
Rare Earth Ions ◽  
Emission Lines ◽  
Photoluminescence Spectra ◽  
The Difference ◽  
Ligand Fields ◽  
Rare Earth Doped ◽  
The Eu

AbstractIntense triboluminescence has been observed in rare-earth-doped aluminosilicates such as BaAl2Si2O8and SrAl2Si2O8doped with Eu2+, Tb3+, or Dy3+. The triboluminescence is caused by the excitation of and emission from rare-earth ions doped in the crystals. A discrepancy in the wavelength of maximum emission intensity between triboluminescence and photoluminescence spectra is observed for the 4f65d-4f7 transition of Eu2+, whereas the peak positions and the relative intensities of emission lines in triboluminescence and photoluminescence spectra are almost the same as each other for the 4f-4f transitions of Th3+ and Dy3+. This is because the 5d levels, which are more significantly affected by ligand fields than the 4f levels, contribute to the transition of Eu2+. It is thought that the difference in local environment around the Eu2+ between on the fractured surface and within the bulk brings about the discrepancy between triboluminescence and photoluminescence spectra

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