Rare earth metal-organic frame material as well as preparation method and application thereof

An organic framework, rare earth metal technology, applied in 3/13 groups of organic compounds without C-metal bonds, analytical materials, luminescent materials, etc., to achieve the effects of high stability, novel structure and simple process

Inactive Publication Date: 2015-07-29
NANKAI UNIV
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Problems solved by technology

Benzyl alcohol as a solvent for spectinomycin hydrochloride has an analgesic effect, but it is easily oxidized to benzaldehyde when exposed to air

Method used

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  • Rare earth metal-organic frame material as well as preparation method and application thereof
  • Rare earth metal-organic frame material as well as preparation method and application thereof
  • Rare earth metal-organic frame material as well as preparation method and application thereof

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Embodiment

[0020] A rare-earth metal–organic framework with fluorescent recognition, such as figure 1 Shown, the chemical formula is {[Tb 2 (TATAB) 2 ]·4H 2 O·6DMF} n (Tb-MOF), where TATAB is 4,4',4"-s-triazine-1,3,5-tri-p-aminobenzoic acid, n is a natural number from 1 to positive infinity, and MOF is metal-organic frame; the basic unit of the metal frame structure includes two crystallographically independent Tb 3+ ions and two TATAB ligands. The two TATAB ligands adopt similar coordination modes, but their stretching degrees are slightly different due to the different angles formed by the N atom on the amino group and the adjacent triazine ring C atom and benzene ring C atom; The three carboxyl groups on the body adopt two different coordination modes: the first is chelating / bridging tridentate, the other is symmetrically bridged bidentate, and the whole ligand acts as μ 6- The bridge connects the six Tb 3+ Ion center; both Tb1 and Tb2 come from the coordination of eight oxygen...

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Abstract

The invention discloses a rare earth metal-organic frame with a fluorescent recognition function. The chemical formula is {[Tb2(TATAB)2)].4H2O.6DMF}n, wherein the TATAB in the formula is 4,4',4''-s-triazine-1,3,5-tri-para aminobenzoic acid; each metal framework structure elementary unit comprises two crystallographically independent Tb<3+> ions and two TATAB ligands, and the two Tb<3+> ions are connected into a dual-core elementary unit [Tb2(CO2)4] through six oxygen atoms on the two TATAB ligands; the dual-core units are connected into a one-dimensional Tb-carboxyl chain through the ligands, and extend towards four directions respectively through rigid benzene ring carboxyl on TATAB to form a three-dimensional porous network frame. The rare earth metal-organic frame has the advantages that the material synthesis process is simple, the crystal purity is high, the structure is novel, the stability in organic solvent is high, and formaldehyde and benzaldehyde can be recognized at the same time.

Description

【Technical field】 [0001] The invention relates to a preparation method of a rare earth metal-organic framework material and its application in fluorescence sensing. 【Background technique】 [0002] In recent years, various fluorescent sensing materials have attracted great interest, among which lanthanide-metal-organic frameworks (Ln-MOFs) have attracted much attention, mainly because it combines the fluorescence characteristics of lanthanide ions with the porous properties of MOFs. It fits together perfectly. As the metal center of Ln-MOFs, lanthanide ions provide good fluorescence properties, mainly because the fluorescence of lanthanide ions has a large Stokes shift, high purity of emission color, long fluorescence lifetime and red ( Eu 3+ ), Green (Tb 3+ ), blue (Eu 2+ ) has the characteristics of three primary colors. For many Ln-MOFs, the realization of their fluorescence detection function depends on the entry of guest molecules (including anions, metal cations an...

Claims

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Application Information

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IPC IPC(8): C07F5/00C09K11/06G01N21/64
CPCC07F5/003C09K11/06C09K2211/1007C09K2211/1059G01N21/643
Inventor 程鹏张环陈迪明
Owner NANKAI UNIV
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