Achieving tunable emitting YAl3(BO3)4:Eu phosphors by substituting cations (Sr2+, Ca2+, Ga3+, In3+) and controlling BO3 group polarizability

CrystEngComm ◽  
2020 ◽  
Vol 22 (32) ◽  
pp. 5323-5337
Author(s):  
Jinjin Liu ◽  
Zhijun Wang ◽  
Xue Li ◽  
Xiangyu Meng ◽  
Keliang Qiu ◽  
...  
Keyword(s):  
Valence State ◽  
Luminescence Characteristics ◽  
Group Polarizability

To explore the influence of the luminescence characteristics and valence state of Eu ions, a series of YAl3(BO3)4−m(PO4)m:0.05Eu, Y0.925−xACxLxBO:0.05Eu, Y0.925−yASyLyBO:0.05Eu, Y0.925−zAGzBO:0.05Eu and Y0.925−wAIwBO:0.05Eu phosphors are synthesized.

scholarly journals Oxidation suppression of Cu in alkaline aluminophosphate glass and the effects for radiation-induced luminescence characteristics

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Daiki Shiratori ◽  
Hirokazu Masai ◽  
Takumi Kato ◽  
Go Okada ◽  
Daisuke Nakauchi ◽  
...  
Keyword(s):  
Valence State ◽  
Glass Melting ◽  
Chemical Compositions ◽  
Edge Structure ◽  
X Ray ◽  
Valence States ◽  
Wide Range ◽  
Doped Glasses ◽  
Radiation Induced ◽  
Luminescence Characteristics

AbstractA glass phosphor is an attractive material for applications in radiation detections because of its high workability and availability with a wide range of chemical compositions. Recently, X-ray-induced luminescence of glasses containing various luminescent activators are actively investigated worldwide. In applications as phosphor, tailoring valence state of activators, which can take multiple valence states in glass, is very important. In this research, we studied effects of glass melting atmosphere on the valence state of copper-activator ion in alkaline aluminophosphate glasses and the radiation-induced luminescence characteristics. Optical absorption and X-ray absorption near edge structure spectra of Cu-doped glasses showed that the glass fused in Ar atmosphere contains higher concentration of Cu+ than those prepared in air. In addition, the presence of Cu+ enhances the photoluminescence (PL) quantum yield and PL kinetic constant. Furthermore, the increase of Cu+ concentration resulted an improvement of the X-ray-induced scintillation and thermally-stimulated luminescence intensity.

Valence state analysis of elements by EPMA and its application

1990 ◽  
Vol 48 (2) ◽  
pp. 230-231
Author(s):  
Chen Liqing ◽  
Liu Zuqin ◽  
Zhang Wei
Keyword(s):  
Valence State ◽  
Line Intensities ◽  
Valence States ◽  
Valence Electrons ◽  
Fe And Mn ◽  
Intensity Ratios ◽  
State Analysis

Valence state analyses of Fe and Mn in oxides by EPMA have been reported in literature. In this paper, the effects of valence state on intensity ratios ILα/IKα and ILα/ILβ of Cu, Ni, Co, Fe, Mn, Cr and their oxides, and on intensity ratios ILβ2/ILα1 and ILγ1/ILα1 of Mo, Nb, Zr and their oxides were studied. It was observed that intensity ratios change with valence states in accordance with some regularities, and these effects could be utilized for analyzing the valence states of catalysts.Valence state analysis of elements by EPMA is based on the fact that changes in the states of valence electrons in the outer shells of an atom cause corresponding changes in line intensities. The M electrons of Cu, Ni, Co, Fe, Mn, Cr and the N electrons of Mo, Nb, Zr are valence electrons. Line Kα1,2 and six lines of L are produced from the transitions of K-L2,3 and L-M or L-N respectively.

Theory for the mixed-valence state

1979 ◽  
Vol 40 (C5) ◽  
pp. C5-374-C5-374 ◽  
Author(s):  
C. M. Varma
Keyword(s):  
Valence State ◽  
Mixed Valence ◽  
Mixed Valence State

MIXED VALENCE STATE OF Sm ON THE SURFACE OF AMORPHOUS La80-xSmxAu20 ALLOYS

1980 ◽  
Vol 41 (C8) ◽  
pp. C8-799-C8-802 ◽  
Author(s):  
G. Krill ◽  
A. Amamou ◽  
A. Berrada ◽  
J. Durand ◽  
N. Hassanain
Keyword(s):  
Valence State ◽  
Mixed Valence ◽  
Mixed Valence State

Tc-99m Labeled Complexes of Aldehydes and Glutamate as Cholescintigraphic Agents

1975 ◽  
Vol 14 (04) ◽  
pp. 330-338
Author(s):  
L. G. Colombetti ◽  
J. S. Arnold ◽  
W. E. Barnes
Keyword(s):  
Nuclear Medicine ◽  
Gall Bladder ◽  
Rose Bengal ◽  
Valence State ◽  
Monosodium Glutamate ◽  
Kinetic Studies ◽  
Scintillation Camera ◽  
Blood Clearance ◽  
Lower Valence ◽  
Wire Basket

SummaryTc-99m pyridoxylidene glutamate has proven to be an excellent biliary scanning agent, far superior in many respect to the commonly used 1-131 rose bengal. The preparation of the compound as previously reported by Baker et al is too time consuming and requires the use of an autoclave which is not available in most nuclear medicine departments. In our facility, we have been preparing similar compounds using several aldehydes and monosodium glutamate to make labeled complexes having the same pharmacological characteristics. The mixture of monosodium glutamate, aldehyde, and Tc-99m pertechnetate is made slightly alkaline, purged with helium, and placed in a sealed vial. The vial, which is protected by a wire basket, is then heated in a laboratory oven at 130° C for a period of 15 to 20 minutes. During this time, the technetium is reduced to a lower valence state and bound to the complex formed. Chromatographic data show that these compounds are chemically similar to that previously reported. The compounds prepared concentrate in the gall bladder of the rabbit in less than 10 minutes. Kinetic studies have been performed on dogs with a scintillation camera and small digital computer to measure rates of blood clearance, liver and gall bladder uptake, and excretion into the intestine. The aldehyde — glutamate complex promises to be a useful scanning agent for the diagnosis of biliary and hepatocellular diseases.

Valence state and magnetism of Mn-doped PbPdO 2 nanograin film synthesized by sol-gel spin-coating method

2017 ◽  
Vol 623 ◽  
pp. 14-18 ◽  
Author(s):  
Fenglin Tang ◽  
Chao Mei ◽  
Peiyu Chuang ◽  
Tingting Song ◽  
Hailin Su ◽  
...  
Keyword(s):  
Spin Coating ◽  
Valence State ◽  
Sol Gel ◽  
Spin Coating Method ◽  
Coating Method ◽  
Mn Doped

Unraveling the Role of Crystallization Dynamics on Luminescence Characteristics of Perovskite Light‐Emitting Diodes

2021 ◽  
pp. 2100023
Author(s):  
Kong‐Chao Shen ◽  
Jing‐Kun Wang ◽  
Yang Shen ◽  
Yan‐Qing Li ◽  
Ming‐Lei Guo ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Light Emitting ◽  
Crystallization Dynamics ◽  
Luminescence Characteristics

scholarly journals Influence of Fe doping on the Yb valence state and the magnetic structures in HoFe6Sn6-type YbMn6−yFeySn6 alloys (y ≤ 1.00)

2021 ◽  
Vol 875 ◽  
pp. 160091
Author(s):  
A. Magnette ◽  
L. Eichenberger ◽  
L.V.B. Diop ◽  
G. Venturini ◽  
L. Nataf ◽  
...  
Keyword(s):  
Valence State ◽  
Fe Doping ◽  
Magnetic Structures
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