Lanthanide series metal-organic framework material with excellent second harmonic performance and preparation method thereof

A second harmonic and lanthanide metal technology, applied in the field of lanthanide metal-organic framework materials and their preparation, can solve problems such as lack of theory and achieve excellent second harmonic performance

Inactive Publication Date: 2020-05-22
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the relevant theories are still lacking, and the relationship between the nonlinear optical properties of MOFs and the pump wavelength, structural features, metal atoms, and crystal size needs to be systematically studied.

Method used

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  • Lanthanide series metal-organic framework material with excellent second harmonic performance and preparation method thereof
  • Lanthanide series metal-organic framework material with excellent second harmonic performance and preparation method thereof
  • Lanthanide series metal-organic framework material with excellent second harmonic performance and preparation method thereof

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Experimental program
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Embodiment 1

[0029] Utilizing terbium nitrate and hexyl[4-(carboxyphenyl)carbonyl]-3-oxane, a metal-organic framework material was synthesized by a solvothermal method. The specific synthetic route is as follows:

[0030] Dissolve 0.1 mmol of terbium nitrate and 0.1 mmol of hexyl[4-(carboxyphenyl)carbonyl]-3-oxane in 7 mL of DMF and 1 mL of H 2 O mixed solvent, then add 1mL HNO 3 aqueous solution (1M). The solution was packaged in a 20mL polytetrafluoroethylene reactor, and placed in an oven at 160°C for 72 hours. After cooling to room temperature and washing with DMF three times, a colorless needle-like metal-organic framework material Tb was obtained. 2 L(DMF) 2 ·(H 2 O) 5 (DMF) 3 .

Embodiment 2

[0032] Utilizing lanthanum nitrate and hexyl[4-(carboxyphenyl)carbonyl]-3-oxane, a metal-organic framework material was synthesized by a solvothermal method. The specific synthetic route is as follows:

[0033] Dissolve 0.1 mmol of lanthanum nitrate and 0.1 mmol of hexyl[4-(carboxyphenyl)carbonyl]-3-oxane in 7 mL of DMF and 1 mL of H 2 O mixed solvent, then add 1mL HNO 3 aqueous solution (1M). The solution was packaged in a 20mL polytetrafluoroethylene reactor, and placed in an oven at 160°C for 72 hours. After cooling to room temperature and washing 3 times with DMF, a colorless needle-like metal-organic framework La 2 L·(H 2 O) 5 (DMF) 5 .

[0034] Using the preparation method of the present invention, the corresponding MOFs materials were synthesized for eight kinds of lanthanide metals. It can be clearly seen from powder X-ray diffraction (PXRD) that La-Tb-MOFs are isomorphic. ( figure 1 ). To verify the differences in crystal structure, single crystal resolution ...

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Abstract

The invention discloses a lanthanide series metal-organic framework material with excellent second harmonic performance and a preparation method thereof. The chemical formula of the material is M(L)<x>(G)<y>, wherein M is a metal atom, L is a flexible organic ligand containing a hexacarboxylic acid group, and G is a solvent molecule. The material is prepared by adopting a solvothermal method. Thelanthanide series metal-organic framework material disclosed by the invention has a non-centrosymmetric C121 space group, so the lanthanide series metal-organic framework material has second harmonicperformance, and the highest second harmonic performance can reach 4 times or more of the second harmonic performance of a potassium dihydrogen phosphate crystal. In general, the strength of SHG of La-Tb-MOFs shows a rising trend along with the increase of a metal atomic number, and experiments find that the SHG of La-Tb-MOFs is inversely related to average coordination bond length; that is, the SHG of La-Tb-MOFs is consistent with the electron push-and-pull capacity of the metal atom; and MOFs with sizes of 170-300 meshes show optimal SHG performance under various pumping wavelengths.

Description

technical field [0001] The invention belongs to the technical field of metal-organic framework materials, and relates to a lanthanide metal-organic framework material with excellent second harmonic performance and a preparation method thereof, especially a series of La-Tb-MOFs with the same crystal configuration, which have non-center Symmetrical C121 space group, showing excellent second harmonic performance. Background technique [0002] When the laser acts on the second-order nonlinear optical material, in addition to generating light with the same frequency as the incident frequency w (linear part), it also generates frequency-doubled light with a frequency of 2w, which is called the second harmonic (SHG) effect. As a common characterization form of second-order nonlinear optical materials, SHG has been widely used in the field of harmonic imaging and sensing. The strong localization of nonlinear effects reduces the background interference caused by non-focus optics, im...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G83/00C09K11/06
CPCC08G83/008C09K11/06C09K2211/1425C09K2211/182
Inventor 崔元靖万雅婷钱国栋杨雨
Owner ZHEJIANG UNIV
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