Light harvesting indolyl-substituted phosphoramide ligand for the enhancement of Mn(ii) luminescence

2020 ◽  
Vol 49 (22) ◽  
pp. 7525-7534 ◽  
Author(s):  
Marco Bortoluzzi ◽  
Jesús Castro ◽  
Alberto Gobbo ◽  
Valentina Ferraro ◽  
Luca Pietrobon
Keyword(s):  
General Formula ◽  
Light Harvesting ◽  
Green Luminescence ◽  
Bright Green ◽  
Tetrahedral Complexes

Excitation of the coordinated ligands in tetrahedral complexes having the general formula [MnX2L2] (X = Cl, Br, I; L = N,N′,N′-tetramethyl-P-indol-1-ylphosphonic diamide) causes bright green luminescence from the Mn(ii) centre.

scholarly journals Some complexes of N-aryl furfural nitrones with Co (II), Ni (II), Cu (II), Zn (II) and Cd (II) chlorides

2016 ◽  
Vol 4 (1) ◽  
pp. 10
Author(s):  
Amer A. Taqa
Keyword(s):  
Spectral Data ◽  
General Formula ◽  
Elemental Analysis ◽  
13C Nmr ◽  
High Frequency ◽  
Metal Ion ◽  
Uv Spectroscopy ◽  
Active Atom ◽  
Tetrahedral Complexes

Some new metal(II) dichloride complexes with the ligands substituted nitrones of the general formula [ML2Cl2], where M= Co(II), Ni(II), Cu(II), Zn(II) and Cd(II), L=OCH=CHCH=C-CH=N(O)C6H4X (X=H,p-CH3,CH3O,CH3CO,F,Cl,and Br) have been prepared and characterized by elemental analysis, IR,1H,13C NMR and Vis/Uv spectroscopy. The IR spectral data showed that the nitrone ligands coordinated with the metal ion through the most active atom of the N-oxide to give square planner coordinate (Cu,Ni,) complexes and (Zn,Cd,Co) tetrahedral complexes. No correlation was observed between the N-O vibrations stretching high frequency ν (N-O) of the complexes and the Hammet (σ) constants.

Application of three-coordinate copper(i) complexes with halide ligands in organic light-emitting diodes that exhibit delayed fluorescence

2015 ◽  
Vol 44 (18) ◽  
pp. 8369-8378 ◽  
Author(s):  
Masahisa Osawa ◽  
Mikio Hoshino ◽  
Masashi Hashimoto ◽  
Isao Kawata ◽  
Satoshi Igawa ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Layered Structures ◽  
Delayed Fluorescence ◽  
Organic Light Emitting Diodes ◽  
Green Luminescence ◽  
Light Emitting ◽  
Organic Light ◽  
Bright Green ◽  
Halide Ligands

Conventional bottom-emitting devices with three-layered structures containing sublimable three-coordinate copper(i) complexes produce bright green luminescence with maximum external quantum efficiencies (EQE) of 18.6–22.5%.

scholarly journals Manganese(II) in Tetrahedral Halide Environment: Factors Governing Bright Green Luminescence

2019 ◽  
Vol 31 (24) ◽  
pp. 10161-10169 ◽  
Author(s):  
Viktoriia Morad ◽  
Ihor Cherniukh ◽  
Lena Pöttschacher ◽  
Yevhen Shynkarenko ◽  
Sergii Yakunin ◽  
...  
Keyword(s):  
Green Luminescence ◽  
Environment Factors ◽  
Bright Green

scholarly journals A Halomanganates(II) with P,P’-Diprotonated Bis(2-Diphenylphosphinophenyl)ether: Wavelength-Excitation Dependence of the Quantum Yield and Role of the Non-Covalent Interactions

2021 ◽  
Vol 22 (13) ◽  
pp. 6873
Author(s):  
Alexey S. Berezin
Keyword(s):  
Quantum Yield ◽  
Excitation Energy ◽  
The Other ◽  
Green Luminescence ◽  
Radiative Relaxation ◽  
Bright Green ◽  
Non Covalent Interactions ◽  
The One ◽  
Covalent Interactions

A [H2DPEphos][MnX4] [X = Br, Cl] tetrahalomanganates(II) with P,P’-diprotonated bis[2-(diphenylphosphino)phenyl]ether cation has been designed and investigated in photophysics and EPR terms. The complexes exhibit a green luminescence resulted from the Mn(II) d–d transitions (4T1→6A1) with the wavelength-excitation dependence of the quantum yield. The solid [H2DPEphos][MnBr4] complex exhibits a bright green phosphorescence (λmax = 515 nm) with the high luminescence quantum yield depending on the excitation energy whereas the solid [H2DPEphos][MnCl4] complex exhibits a very weak phosphorescence (λmax = 523 nm). The unexpected shorter luminescence lifetime for the [H2DPEphos][MnCl4] than for the [H2DPEphos][MnBr4] at 300 K can be a result of the higher non-radiative relaxation contribution. On the one hand, the non-covalent PH…X(Mn) interactions quench the manganese(II) luminescence. On the other hand, the PH…X(Mn) interactions are a pathway of the excitation transfer from [H2DPEphos]2+ to [MnX4]2−.

Preparation and Photoluminescence Properties of Green-Emitting LiYb1-xTbx(MoO4)2(x = 0.01-1) Phosphors

2016 ◽  
Vol 852 ◽  
pp. 496-501
Author(s):  
Xue Bin Qiao ◽  
Hyo Jin Seo
Keyword(s):  
Solid Solution ◽  
Luminescence Decay ◽  
Solid Solution Series ◽  
Photoluminescence Properties ◽  
Green Luminescence ◽  
Excitation Spectra ◽  
Space Group ◽  
X Ray ◽  
Potential Applications ◽  
Bright Green

s. Tb3+-doped LiYb1-xTbx(MoO4)2 (x = 0.01-1) solid solutions were prepared by solid state reaction. Structural of the solid solution series was carried out by X-ray powder diffraction. By increasing the Tb3+concentration, the XRD results reveal that LiYb1-xTbx(MoO4)2 adopt a tetragonal structure with space group of I4(No. 82) and transfer to tetragonal structurewith space group of P41/a (No.88) systemically. The emission and excitation spectra were employed to characterize the synthesized phosphors. Theexcitation spectra showed that LiYb1-xTbx(MoO4)2 can be efficiently excited by the lights of 250-500 nm, which well match with the emission wavelength of near-UV and blue LEDs chips. The phosphor showed bright green luminescence peaking at around 545 nm under the excitation at 266 nm and 490 nm.The Luminescence intensities are investigated under different Tb3+ concentrations. The luminescence decay and the color coordinates were also discussed in order to further investigate the potential applications.

scholarly journals On the origins of the green luminescence in the “zero-dimensional perovskite” Cs4PbBr6: conclusive results from cathodoluminescence imaging

Nanoscale ◽  
2019 ◽  
Vol 11 (9) ◽  
pp. 3925-3932 ◽  
Author(s):  
Nicolas Riesen ◽  
Mark Lockrey ◽  
Kate Badek ◽  
Hans Riesen
Keyword(s):  
Green Emission ◽  
Green Luminescence ◽  
Bright Green ◽  
Cathodoluminescence Imaging

Cathodoluminescence imaging reveals that the bright green emission from the zero-dimensional perovskite Cs4PbBr6 is due to nanoscale CsPbBr3 impurities.

The uranium-bearing mineral bolivarite: new data and a second occurrence

1971 ◽  
Vol 38 (296) ◽  
pp. 418-423 ◽  
Author(s):  
L. Van Wambeke
Keyword(s):  
Specific Gravity ◽  
Physical Properties ◽  
General Formula ◽  
Uranium Mineralization ◽  
Chemical Analyses ◽  
Republic Of Congo ◽  
Uv Fluorescence ◽  
Bright Green ◽  
Dta Curve

SummaryA second occurrence of the mineral bolivarite has been found in the Kobokobo pegmatite, Kivu, Republic of Congo (Kinshasa). This amorphous mineral was previously considered to be evansite. Its physical properties are: weak birefringence; biaxial to uniaxial positive; n = 1·50–1·51; specific gravity 1·97–2·05; hardness 3 to 3½.Three chemical analyses have been performed on the Congolese material. The general formula of the mineral is Al2(PO4)(OH)3.4–5 H2O. Both known bolivarites from Spain and Congo contain abnormal amounts of U. The bright green UV fluorescence is due to the presence of U. The DTA curve of the Congolese bolivarite is given. Its genesis is discussed. This uranium-bearing mineral may be an indicator of uranium mineralization in Spain.

Observation of bright green luminescence in an Eu2+ complexed graphene oxide composite through reduction of Eu3+

2015 ◽  
Vol 39 (6) ◽  
pp. 4210-4213 ◽  
Author(s):  
Uttam Kumar Ghorai ◽  
Rajarshi Roy ◽  
Nilesh Mazumder ◽  
Subhajit Saha ◽  
Swati Das ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduction Technique ◽  
Green Luminescence ◽  
Oxide Composite ◽  
Bright Green

We have demonstrated a simplified reduction technique of Eu3+ to Eu2+ in complexation with an azo-pyridine graphene oxide composite and its effect on photoluminescence.

scholarly journals Facile synthesis of intense green light emitting LiGdF4:Yb,Er-based upconversion bipyramidal nanocrystals and their polymer composites

Nanoscale ◽  
2014 ◽  
Vol 6 (13) ◽  
pp. 7461-7468 ◽  
Author(s):  
Hyejin Na ◽  
Jong Seok Jeong ◽  
Hye Jung Chang ◽  
Hyun You Kim ◽  
Kyoungja Woo ◽  
...  
Keyword(s):  
Polymer Composites ◽  
Green Light ◽  
Facile Synthesis ◽  
Green Luminescence ◽  
Light Emitting ◽  
Bright Green ◽  
Transparent Composites

Intense upconversion green light emitting LiGdF4:Yb,Er-based tetragonal bipyramidal nanophosphors are synthesized via Y3+ doping. The highly transparent composites emit bright green luminescence.

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