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Multi-branched oxdiazole two-photon pump fluorescent material and preparation method thereof

A technology of oxadiazoles and fluorescent materials, which is applied in the field of multi-branched two-photon pumped fluorescent materials and their preparation, can solve problems such as complex influencing factors, and achieve the effect of strong optical limiting effect

Inactive Publication Date: 2007-12-05
SOUTHEAST UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Two-photon pumped fluorescence is a third-order nonlinear optical process of molecules, and its influencing factors are complex

Method used

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  • Multi-branched oxdiazole two-photon pump fluorescent material and preparation method thereof
  • Multi-branched oxdiazole two-photon pump fluorescent material and preparation method thereof
  • Multi-branched oxdiazole two-photon pump fluorescent material and preparation method thereof

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Embodiment Construction

[0036] The multi-branched oxadiazole two-photon pump fluorescent material of the present invention contains a multi-branched oxadiazole structure, which is a multi-branched oxadiazole derivative represented by the following general formula:

[0037]

[0038] Wherein N is a nitrogen atom, O is an oxygen atom, R is a substituent group on the aromatic ring, and R is respectively selected from the following groups:

[0039]

[0040] The preparation method is: in a nitrogen atmosphere, add brominated triphenylamine derivatives and 3,5-bis{2-(4-tert-butylphenyl)-5-[1,3,4]- Oxadiazolyl}-styrene or 2-(4-tert-butylphenyl)-5-[1,3,4]-oxadiazolyl-styrene, in catalyst palladium acetate and tri-o-methyl Under the catalysis of phenylphosphine, the Heck reaction is carried out in a mixed solvent of triethylamine and N,N-dimethylformamide with a volume ratio of 1:1, the reaction temperature is 90-105°C, and the reaction time is 24-72h, wherein: Brominated triphenylamine derivative: ethy...

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Abstract

The present invention is multiramose double photon pumped fluorescent oxdiazole material and its preparation process. The oxdiazole material is prepared with polycyclic arene bromide and 3, 5-bis{2-(4-tertiary butyl phenyl)-5-[1, 3, 4]-oxdiazolyl}-styrene or 2-(4-tertiary butyl phenyl)-5-[1, 3, 4]-oxdiazolyl-styrene, and through Heck reaction inside mixed solvent of triethylamine and N, N-dimethyl formamide catalyst under the action of catalyst palladium acetate and tri-o-methylphenyl phosphide; or prepared with triphenylamido aromatic aldehyde derivative and benzyl bromo triphenyl phosphine containing [1, 3, 4]-oxdiazole structure, and through solid and liquid Wittig reaction. The oxdiazole material possesses sufficient double photon absorption cross section, high double photon fluorescence efficiency and high heat stability, and can emit strong double photon up converted green and blue fluorescence under the excitation of 800 nm laser beam.

Description

technical field [0001] The invention relates to a kind of multi-branch two-photon pump fluorescent material and a preparation method thereof. The specific structure contains electron-transporting oxadiazole units and hole-transporting triphenylamine or carbazole units. Multiple oxadiazole branches are connected with triphenylamine and carbazole chromophores through styrene conjugated chains to form optical antennas. Structure, star-shaped multi-branched two-photon pumped fluorescent material with light harvesting function and intramolecular energy transport performance. Background technique [0002] Two-photon pumping fluorescence is a process in which a molecule absorbs two photons at the same time to reach an excited state, and then transitions to the ground state to generate fluorescence. It is characterized by long-wave excitation and short-wave emission, which is a frequency up-conversion fluorescence. Compared with single-photon fluorescence, two-photon fluorescence ...

Claims

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Application Information

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IPC IPC(8): C09K11/06
Inventor 钱鹰崔一平路志锋林保平孙岳明吕昌贵
Owner SOUTHEAST UNIV
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