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A tetramer crystal of 8-hydroxyquinoline rare earth ytterbium complex with upconversion luminescence and its preparation method and application

A hydroxyquinoline and ytterbium complex technology is applied in the field of 8-hydroxyquinoline rare earth ytterbium complex tetrameric crystal and its preparation, which can solve the problems of low quantum yield and weak absorption, and achieve good luminous intensity, excellent Antiferromagnetic, good thermal stability effect

Active Publication Date: 2019-08-30
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, lanthanide (rare earth element) ionic electronic transitions are restricted by Laporte's rule, resulting in their weak absorption and low quantum yield

Method used

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  • A tetramer crystal of 8-hydroxyquinoline rare earth ytterbium complex with upconversion luminescence and its preparation method and application
  • A tetramer crystal of 8-hydroxyquinoline rare earth ytterbium complex with upconversion luminescence and its preparation method and application
  • A tetramer crystal of 8-hydroxyquinoline rare earth ytterbium complex with upconversion luminescence and its preparation method and application

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Embodiment 1

[0071] Example 1 Preparation of (E)-2-[3,5-dibromo-2-hydroxystyryl]-8-acetoxyquinoline, ligand H 2 Tetrameric Crystals of L-Br and 8-Hydroxyquinoline Rare Earth Ytterbium Complexes

[0072] 1. The preparation method of (E)-2-[3,5-dibromo-2-hydroxystyryl]-8-acetoxyquinoline comprises the following steps:

[0073] (1) Weigh 0.80g (5mmol) 2-methyl-8-hydroxyquinoline, 1.53g (5.5mmol) 3,5-dibromosalicylaldehyde, add to a 100mL round bottom flask, then add 15mL acetic anhydride to fully dissolve;

[0074] (2) Carry out magnetic stirring under the protection of nitrogen, and heat and reflux at 145° C. for 22 hours;

[0075] (3) After heating to reflux, cool to room temperature, add 30mL of ice water below 0°C, and filter when solids are precipitated to obtain solids, wash the solids with deionized water, and dry them in vacuum for 3 hours to obtain 2.22g of light yellow solids The compound is (E)-2-[3,5-dibromo-2-hydroxystyryl]-8-acetoxyquinoline, and its yield is 88%;

[0076] I...

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Abstract

The invention provides an 8-hydroxyquinoline rare earth ytterbium complex tetramer crystal with up-conversion luminescence as well as a preparation method and application thereof. The crystal takes rare earth ytterbium as a metal center, the rare earth ytterbium is coordinated with ligand H2L-Br to obtain the crystal with a tetramer structure, and the molecular formula of the crystal is Yb4(H2L-Br)4(MeOH)(DMF)3(H2O)4. The crystal has the dual functions of up-conversion luminescence and near-infrared luminescence, and has better luminescence intensity, the defect that ytterbium ions are small in absorption coefficient and can only be excited by a laser light source can be improved, meanwhile, the crystal has excellent antiferromagnetism and relatively good thermal stability, the crystal haswide application in use as or preparing luminescent materials, magnetic functional materials, biological cell imaging, energy conversion materials and the like; in addition, the crystal is simple inpreparation method process, low in cost, and excellent in performance, and has an academic research value and a potential practical application value.

Description

technical field [0001] The invention belongs to the technical field of organometallic complexes. More specifically, it relates to a tetrameric crystal of 8-hydroxyquinoline rare earth ytterbium complex with upconversion luminescence and its preparation method and application. Background technique [0002] Rare earth metals are China's superior strategic resources, known as "modern industrial vitamins". Among them, rare earth metal ions have narrow emission bands, emission spectra with atomic-like spectral properties, and high color purity (half-width peak<10nm), which is one of the ideal materials in luminescent functional materials. However, lanthanide (rare earth element) ionic electronic transitions are restricted by Laporte's rule, leading to their weak absorption and low quantum yield. One of the solutions is to use some organic ligands to cooperate with rare earth metal ions to improve its light absorption efficiency. For rare earth complexes with conjugated ligan...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07F5/00C09K11/06H01F1/42
Inventor 毛元优霍延平籍少敏徐建兴潘成强余力孙建伟程树森
Owner GUANGDONG UNIV OF TECH