Crystal structure, luminescence properties and energy transfer of Eu3+/Dy3+ doped GdNbTiO6 broad band excited phosphors

RSC Advances ◽  
2016 ◽  
Vol 6 (56) ◽  
pp. 50797-50807 ◽  
Author(s):  
N. Liu ◽  
J. Y. Si ◽  
G. M. Cai ◽  
Y. Tao
Keyword(s):  
Crystal Structure ◽  
Energy Transfer ◽  
Charge Transfer ◽  
Excitation Energy ◽  
Excited States ◽  
Uv Radiation ◽  
Charge Transfer Band ◽  
Broad Band ◽  
Host Material ◽  
Luminescence Properties

GdNbTiO6 has been used as a broad band excited host material absorbing UV radiation, and the excitation energy is transferred from the O2− → Nb5+(Ti4+) charge transfer band to the excited states of Eu3+/Dy3+ ions, presenting different emission colors.

VUV-Photoluminescence Properties of (Gd, La)2O2CO3: Eu3+

2014 ◽  
Vol 1052 ◽  
pp. 203-206
Author(s):  
Zhi Long Wang ◽  
Shi Qin Wang ◽  
Nin Yao ◽  
Xing Min Wei
Keyword(s):  
Charge Transfer ◽  
Vacuum Ultraviolet ◽  
Charge Transfer Band ◽  
Broad Band ◽  
Photoluminescence Properties ◽  
Flux Method ◽  
Excitation Spectra ◽  
Red Emission ◽  
Ultraviolet Excitation

(Gd,La)2-x O2CO3:Eux3+(0.01 ≤x≤0.04) were synthesized via a flux method at 400°C, and their photoluminescence properties under vacuum ultraviolet (VUV) excitation were examined. The excitation spectra showed two bands in the region from 125 nm to 300 nm, the first band centered at 190 nm was ascribed to absorption of related CO32- complex, and the second broad band centered at 246nm and 278nm in Gd2O2CO3:Eu3+ was ascribed to the charge transfer band of O2-→ Eu3+. Series samples exhibited red emission at around 611 nm under vacuum ultraviolet excitation corresponding to the 5D0→ 7F2.transition of Eu3+.

Crystal structure, luminescence properties, energy transfer, tunable occupation and thermal properties of a novel color-tunable phosphor NaBa1−zSrzB9O15:xCe3+,yMn2+

2018 ◽  
Vol 47 (39) ◽  
pp. 13913-13925 ◽  
Author(s):  
Qi Bao ◽  
Zhijun Wang ◽  
Jiang Sun ◽  
Zhipeng Wang ◽  
Xiangyu Meng ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Energy Transfer ◽  
Thermal Properties ◽  
High Temperature ◽  
Solid State ◽  
Luminescence Properties ◽  
Solid State Method ◽  
Color Tunable ◽  
State Method

A series of color-tunable NaBa1−zSrzB9O15:Ce3+,Mn2+ phosphors were synthesized by a high temperature solid state method.

UV-vis and Binding Studies of Cobalt Tetrasulfophthalocyanine–Thiolate Complexes as Intermediates of the Merox Process

1999 ◽  
Vol 03 (07) ◽  
pp. 654-666 ◽  
Author(s):  
ALI NAVID ◽  
EDUARD M. TYAPOCHKIN ◽  
CHARLES J. ARCHER ◽  
EVGUENII I. KOZLIAK
Keyword(s):  
Charge Transfer ◽  
Charge Transfer Band ◽  
Broad Band ◽  
Spectral Feature ◽  
Binding Constants ◽  
Kinetic Studies ◽  
Binding Studies ◽  
Π Stacking ◽  
Vis Spectroscopy ◽  
Major Factors

Intermediates of the cobalt tetrasulfophthalocyanine ( CoTSPc )-catalyzed thiol autoxidation were studied by UV-vis spectroscopy. All thiolates react with CoTSPc resulting in the formation of 1:1 complexes. Three major factors control both the stability and aggregation of the complexes: thiolate basicity, metal-to-ligand charge transfer (MLCT) and π stacking. Basic thiolates partially reduce C oII TSPc , whereas CoTSPc complexes with low-basicity aliphatic thiolates ( p K a < 4) do not exhibit Co (II) reduction, based on the absence of the characteristic Co (I) charge transfer band at 450 nm. CoTSPc complexes with aliphatic and bulky aromatic thiolates appear to be aggregated in aqueous solutions and are characterized by a broad band at 650 nm. Non-bulky aromatic thiolates of low basicity ( p K a < 6) form unique stable monomeric Co II TSPc complexes. This unique spectral feature can be attributed to π stacking between the phthalocyanine ring and thiolate. Comparison of binding constants shows that the partial reduction of Co (II) significantly contributes to the thiolate binding. A combination of aromatic π stacking and MLCT appears to be responsible for the observed 1000-fold stronger binding of non-basic aromatic thiolates as compared with aliphatic ligands of similar basicity. Kinetic studies confirm the importance of the thiolate binding type for catalysis.

Charge transfer-induced assembly of a gold nanocomposite mediated by N-methylfulleropyrrolidine: excitation energy transfer from Rhodamine B

2017 ◽  
Vol 41 (6) ◽  
pp. 2401-2408 ◽  
Author(s):  
Sanjeeb Sutradhar ◽  
Archita Patnaik
Keyword(s):  
Energy Transfer ◽  
Charge Transfer ◽  
Excitation Energy ◽  
Rhodamine B ◽  
Excitation Energy Transfer ◽  
Aurophilic Interactions ◽  
Composite Self ◽  
Energy Acceptor ◽  
Ph Controlled

A pH controlled functionalized fullerene-C60-gold NP composite self-assembles via electrostatic as well as aurophilic interactions and acts as an excitation energy acceptor from fluorescent Rhodamine B (3.79 × 6.5 inch).

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