Study of photoluminescence properties of trivalent metal ion (Al3+) coumarinolates doped with quinoline for PCLED application

2020 ◽  
Author(s):  
S. M. Sawde ◽  
R. R. Patil ◽  
S. V. Moharil
Keyword(s):  
Metal Ion ◽  
Photoluminescence Properties ◽  
Trivalent Metal

scholarly journals Luminescence of Eu3+ in Some Scandium Phosphates

2021 ◽  
pp. 638-640
Author(s):  
Rajani A. Bhoyar ◽  
A. C. Nayak
Keyword(s):  
Solid State ◽  
Energy Levels ◽  
Concentration Quenching ◽  
Lanthanide Ions ◽  
Photoluminescence Properties ◽  
Trivalent Metal ◽  
Suitable Host ◽  
Relative Ease ◽  
Luminescence Efficiency ◽  
Light Lanthanides

Lanthanide ions are very efficient activators. Due to the presence of shielded 4f shell, the energy levels can be predicted with relative ease. Interaction with the surrounding lattice is minimum and luminescence efficiency is high. For this reason, many important phosphors having various applications have been discovered which use lanthanide activators. For obtaining efficient phosphors, it is important to find a suitable host for lanthanide activators which can accommodate these ions without concentration quenching. The hosts must be transparent to the emitted light. Lanthanides, most commonly occur as trivalent. Thus, hosts constituted by trivalent metals can be suitable. Yttrium compounds have been extensively studied as hosts. Scandium is another trivalent metal. Compared to the yttrium compounds, Scandium compounds have been very scarcely studied as hosts. We are investigating Scandium compounds as luminescence hosts. Synthesis and photoluminescence properties of Sr9 Sc (PO4)7 : Eu3+ and Sr8MgSc(PO4)7:Eu3+ phosphor are described in this work. The phosphors were prepared by solid state reaction. Usually, these phosphors are reduced and results on Eu2+ photoluminescence are reported. However, we have recorded photoluminescence before reduction and thus new results on Eu3+ emission could be obtained.

Synthesis and hydrolysis of gas-phase lanthanide and actinide oxide nitrate complexes: a correspondence to trivalent metal ion redox potentials and ionization energies

2015 ◽  
Vol 17 (15) ◽  
pp. 9942-9950 ◽  
Author(s):  
Ana F. Lucena ◽  
Célia Lourenço ◽  
Maria C. Michelini ◽  
Philip X. Rutkowski ◽  
José M. Carretas ◽  
...  
Keyword(s):  
Gas Phase ◽  
Metal Ion ◽  
Oxidation States ◽  
Redox Potentials ◽  
Trivalent Metal ◽  
Ionization Energies ◽  
Reduction Potentials ◽  
Hydrolysis Of ◽  
Nitrate Complexes

Gas-phase hydrolysis of lanthanide/actinide MO3(NO3)3−ions relates to the stabilities of the MIVoxidation states, which correlate with IV/III solution reduction potentials and 4th ionization energies.

New multidentate ligands. XXI. Synthesis, proton, and metal ion binding affinities of N,N′,N″-tris[2-(N-hydroxycarbamoyl)ethyl]-1,3,5-benzenetricarboxamide (BAMTPH)

1983 ◽  
Vol 61 (12) ◽  
pp. 2740-2744 ◽  
Author(s):  
Isao Yoshida ◽  
Ichiro Murase ◽  
Ramunas J. Motekaitis ◽  
Arthur E. Martell
Keyword(s):  
Metal Ions ◽  
Metal Ion ◽  
Binding Constants ◽  
Cation Binding ◽  
Ion Binding ◽  
Binding Affinities ◽  
Metal Ion Binding ◽  
Trivalent Metal ◽  
Equilibrium Data ◽  
Trivalent Metal Ions

Synthesis of a new tris-bidentate multidentate ligand, N,N′,N″-tris[2-(N-hydroxycarbamoyl)ethyl]-1,3,5-benzenetricarboxamide (BAMTPH), designed for the binding of trivalent metal ions such as Fe(III), Ga(III), and Al(III), is described. Its cation binding affinities for hydrogen ion and for Fe(III), Co(II), Ni(II), Cu(II), Zn(II), Ga(III), and Al(III) ions are described, and the equilibrium data are compared with those of analogous ligands. The binding constants of trivalent metal ions with the ligand do not show a chelate effect relative to the binding to individual bidentate hydroxamic acids.

scholarly journals Strengthening and Stiffening Graphene Oxide Fiber with Trivalent Metal Ion Binders

2017 ◽  
Vol 34 (9) ◽  
pp. 1600401 ◽  
Author(s):  
Wonsik Eom ◽  
Hun Park ◽  
Sung Hyun Noh ◽  
Ki Hwan Koh ◽  
Kichun Lee ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Metal Ion ◽  
Trivalent Metal ◽  
Oxide Fiber

Complexes of Oxamic Acid with Al(III), Ga(III), In(III), Tl(III), Y(III), Fe(III), Mn(II) and V(III)

1978 ◽  
Vol 33 (9) ◽  
pp. 987-989 ◽  
Author(s):  
J. K. Kouinis ◽  
J. M. Tsangaris ◽  
A. G. Galinos
Keyword(s):  
Metal Ions ◽  
Metal Ion ◽  
Diffuse Reflectance ◽  
Magnetic Moments ◽  
Reflectance Spectra ◽  
Trivalent Metal ◽  
Diffuse Reflectance Spectra ◽  
Trivalent Metal Ions

The preparation of complexes of oxamic acid with Al(III), Ga(III), In(III), Tl(III), Y(III), Fe(III), Mn(II) and V(III) is reported. From the study of the infrared and diffuse reflectance spectra and the magnetic moments (for the complexes of Fe(III), Mn(II) and V(III)) it is concluded that in all complexes the metal ion is coordinated with the carboxyl oxygen and the amidic nitrogen, after the ionization of one of the amidic hydrogens.Octahedral structures are proposed for all the complexes of the trivalent metal ions and the complex K2{Mn(oxamic)2} · 2 H2O.

ChemInform Abstract: Stabilities of Divalent and Trivalent Metal Ion Complexes of Macrocyclic Triazatriacetic Acids.

ChemInform ◽  
2010 ◽  
Vol 24 (44) ◽  
pp. no-no
Author(s):  
R. DELGADO ◽  
Y. SUN ◽  
R. J. MOTEKAITIS ◽  
A. E. MARTELL
Keyword(s):  
Metal Ion ◽  
Trivalent Metal ◽  
Metal Ion Complexes

scholarly journals Eco Friendly Synthesis of Carbon Dot by Hydrothermal Method for Metal Ions Salt Identification

Materials ◽  
2021 ◽  
Vol 14 (24) ◽  
pp. 7604
Author(s):  
Hasan Shabbir ◽  
Tomasz Tokarski ◽  
Ditta Ungor ◽  
Marek Wojnicki
Keyword(s):  
Metal Ion ◽  
Hydrothermal Reaction ◽  
Synthesis Method ◽  
Emission Spectra ◽  
Carbon Quantum Dots ◽  
Photoluminescence Properties ◽  
Step Method ◽  
Synthesis Time ◽  
One Step ◽  
The One

In this work, we report the synthesis method of carbon quantum dots (CDs) using the one-step method for fast and effective metal ion determination. Ascorbic acid was used as an inexpensive and environmentally friendly precursor. High-pressure and high-temperature reactors were used for this purpose. Microscopic characterization revealed the size of CDs was in the range of 2–6 nm and they had an ordered structure. The photoluminescence properties of the CDs depend on the process temperature, and we obtained the highest PL spectra for 6 h of hydrothermal reaction. The maximum emission spectra depend poorly on synthesis time. Further characterization shows that CDs are a good contender for sensing Fe3+ in aqueous systems and can detect concentrations up to 0.49 ppm. The emission spectra efficiency was enhanced by up to 200% with synthesis time.

Sign in / Sign up

Export Citation Format

Share Document