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Your search keyword '"LIU Jun-hui"' showing total 13 results
Start Over Author "LIU Jun-hui" Publisher elsevier bv
13 results on '"LIU Jun-hui"'

3. Investigation on three-photon absorption induced upconversion fluorescence properties of two fluorene-based derivatives

Author

Li Guo Feng and Liu Jun Hui

Subjects
Materials science, 010405 organic chemistry, business.industry, 02 engineering and technology, Electron, Fluorene, 010402 general chemistry, 021001 nanoscience & nanotechnology, Photochemistry, 01 natural sciences, Fluorescence, Atomic and Molecular Physics, and Optics, Photon upconversion, 0104 chemical sciences, Electronic, Optical and Magnetic Materials, chemistry.chemical_compound, chemistry, Resonance fluorescence, Atomic electron transition, Optoelectronics, Fluorescence cross-correlation spectroscopy, Electrical and Electronic Engineering, 0210 nano-technology, business, Laser-induced fluorescence
Abstract

Steady state florescence and three-photon-absorption-induced upconversion fluorescence of two fluorene-based derivatives with different electron donors were investigated. The upconversion fluorescence intensity is cubic with the input intensity. The electron donors have great impact on the upconversion fluorescence property. The transition processes of the two molecules were investigated with TD SCF/DFT theory methods, the results of theory and experiments accord well with each other.

Published
2017
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4. Experimental and quantum chemical studies of the structural enhancement of three-photon absorption in two symmetrical fluorene derivatives

Author

Wang Tianhu, Li Guo Feng, and Liu Jun Hui

Subjects
chemistry.chemical_classification, Coupling, Materials science, Double bond, 02 engineering and technology, Configuration interaction, Conjugated system, Fluorene, 021001 nanoscience & nanotechnology, 01 natural sciences, Molecular physics, Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials, 010309 optics, chemistry.chemical_compound, chemistry, 0103 physical sciences, Molecule, Density functional theory, Electrical and Electronic Engineering, 0210 nano-technology, Absorption (electromagnetic radiation)
Abstract

Three-photon absorption (3PA) cross-section dependence on structure property for two highly conjugated molecules is reported. 3PA cross-sections of the molecules were measured through an optimized method. A 37-fold enhancement was obtained by coupling. The mechanism of this significant enhancement in 3PA cross-section was investigated by density functional theory (DFT) and configuration interaction singles (CIS) method with 6−311 G basis sets. The influence of molecular structure property on the 3PA cross-section is discussed micromechanically. The experimental and theoretical results demonstrate that the coupling effect by C9=C9′ double bond is the most definitive factor for the enhancement behavior.

Published
2020
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