Search

Your search keyword '"Khuyen, Hoang Thi"' showing total 3 results
Start Over Author "Khuyen, Hoang Thi" Journal journal of the american chemical society
3 results on '"Khuyen, Hoang Thi"'

1. Fluorinated [beta]-diketonate diglyme lanthanide complexes as new second-order nonlinear optical chromosomes: the role of f electrons in the dipolar and octupolar contribution to quadratic hyperpolarizability

Author

Valore, Adriana, Cariati, Elena, Righetto, Stefania, Roberto, Dominique, Tessore, Francesca, Ugo, Renato, Fragala, Ignazio L., Fragala, Maria Elena, Malandrino, Graziella, De Angelis Filippo, Ledoux-Rak, Isabelle, Belpassi, Leonardo, Khuyen Hoang Thi, and Zyss, Joseph

Subjects
Ethers -- Chemical properties, Fluorination -- Analysis, Nonlinear optics -- Analysis, Rare earth metals -- Chemical properties, Rare earth metals -- Optical properties, Chemistry
Abstract

The second-order nonlinear optical (NLO) properties of [Ln[(hfac).sub.3](diglyme)] (hfac = hexafluoroacetylacetonate, diglyme = bis(2-methoxyethyl)ether, Ln = La, Ce, Pr, Sm, Eu, Gd, Er, Lu) complexes are examined for providing evidence for the relevant role of f electrons in tuning the second-order NLO response dominated by the octupolar contribution. The lanthanide NLO chromophores have allowed a clean valuation of the affect of f electrons on the quadratic hyperpolarizability and on its dipolar and octupolar contributions.

Published
2010

2. Fluorinated β-Diketonate Diglyme Lanthanide Complexes as New Second-Order Nonlinear Optical Chromophores: The Role of f Electrons in the Dipolar and Octupolar Contribution to Quadratic Hyperpolarizability

Author

R. Ugo, Stefania Righetto, Graziella Malandrino, Dominique Roberto, Elena Cariati, Leonardo Belpassi, Maria Elena Fragala, Joseph Zyss, Filippo De Angelis, Francesca Tessore, Isabelle Ledoux-Rak, I. L. Fragala, Adriana Valore, and Khuyen Hoang Thi

Subjects
Methyl Ethers, Models, Molecular, Lanthanide, Optics and Photonics, Hyperpolarizability, Electron, Lanthanoid Series Elements, Biochemistry, Catalysis, chemistry.chemical_compound, Colloid and Surface Chemistry, Models, Computational chemistry, Electrochemistry, Organometallic Compounds, Ethylene Glycols, Ketones, Chemistry, Molecular, Second-harmonic generation, Diglyme, General Chemistry, Chromophore, Dipole, Physical chemistry, Luminescence
Abstract

The second-order nonlinear optical (NLO) properties of [Ln(hfac)(3)(diglyme)] (hfac = hexafluoroacetylacetonate; diglyme = bis(2-methoxyethyl)ether; Ln = La, Ce, Pr, Sm, Eu, Gd, Er, Lu) complexes have been investigated by a combination of electric-field second harmonic generation (EFISH) and harmonic light scattering (HLS) techniques, providing evidence for the relevant role of f electrons in tuning the second-order NLO response dominated by the octupolar contribution. These lanthanide NLO chromophores allow a clean valuation of the influence of f electrons on the quadratic hyperpolarizability and on its dipolar and octupolar contributions. Molecular quadratic hyperpolarizability values measured by the EFISH method, beta(EFISH), initially increase rapidly with the number of f electrons, the value for the Gd complex being 11 times that of the La complex, whereas this increase is much lower for the last seven f electrons, the beta(EFISH) value of the Lu complex being only 1.2 times that of the Gd complex. The increase of , which is dominated by an octupolar contribution, is much lower along the Ln series. Remarkably, the good values of these simple systems, well known for their luminescence properties, are reached at no cost of transparency.

Published
2010

3. Fluorinated β-Diketonate Diglyme Lanthanide Complexes as New Second-Order Nonlinear Optical Chromophores: The Role of f Electrons in the Dipolar and Octupolar Contribution to Quadratic Hyperpolarizability.

Author

Valore, Adriana, Cariati, Elena, Righetto, Stefania, Roberto, Dominique, Tessore, Francesca, Ugo, Renato, Fragalà, lgnazio L., Fragalà, Maria Elena, Malandrino, Graziella, De Angelis, Filippo, Belpassi, Leonardo, Ledoux-Rak, Isabelle, Khuyen Hoang Thi, and Zyss, Joseph

Subjects
*NONLINEAR optics, *ELECTRIC fields, *RARE earth metals, *POLARIZABILITY (Electricity), *LIGHT scattering, *ELECTRON research
Abstract

The second-order nonlinear optical (NLO) properties of [Ln(hfac)3(diglyme)] (hfac = hexafluo- roacetylacetonate; diglyme = bis(2-methoxyethyl)ether; Ln = La, Ce, Pr, Sm, Eu, Gd, Er, Lu) complexes have been investigated by a combination of electric-field second harmonic generation (EFISH) and harmonic light scattering (HLS) techniques, providing evidence for the relevant role of I electrons in tuning the second- order NLO response dominated by the octupolar contribution. These lanthanide NLO chromophores allow a clean valuation of the influence of f electrons on the quadratic hyperpolarizability and on its dipolar and octupolar contributions. Molecular quadratic hyperpolarizability values measured by the EFISH method, βEFISH, initially increase rapidly with the number of f electrons, the value for the Gd complex being 11 times that of the La complex, whereas this increase is much lower for the last seven f electrons, the βEFISH value of the Lu complex being only 1.2 times that of the Gd complex. The increase of (βHLS), which is dominated by an octupolar contribution, is much lower along the Ln series. Remarkably, the good (βHLS) values of these simple systems, well known for their luminescence properties, are reached at no cost of transparency. [ABSTRACT FROM AUTHOR]

Published
2010
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results