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Oxalate-containing two-dimensional terbium coordination polymer green fluorescent material and preparation method thereof

A coordination polymer and green fluorescence technology, applied in the field of green fluorescent materials and their preparation, can solve the problems of poor stability and low yield of organic green light-emitting materials, and achieve good stability, good green light-emitting properties, electronic transition and The beneficial effect of energy transfer

Inactive Publication Date: 2013-07-10
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention aims to solve the problems of poor stability of existing organic green luminescent materials and low yield of organic green luminescent materials prepared by existing methods, and provides a two-dimensional terbium coordination polymer green fluorescent material containing oxalic acid and its preparation method

Method used

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  • Oxalate-containing two-dimensional terbium coordination polymer green fluorescent material and preparation method thereof
  • Oxalate-containing two-dimensional terbium coordination polymer green fluorescent material and preparation method thereof
  • Oxalate-containing two-dimensional terbium coordination polymer green fluorescent material and preparation method thereof

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specific Embodiment approach 1

[0015] Specific embodiment one: In this embodiment, the molecular formula of a two-dimensional terbium coordination polymer green fluorescent material containing oxalic acid is C 9 h 12 NO 9 Tb belongs to the monoclinic crystal system, the space group is C2 / c, and the unit cell parameter a=17.858 , b=10.760 , c=12.730 , α=90°, β=105.29°, γ=90°; C 9 h 12 NO 9 The central terbium ion of Tb is the nine-coordination mode of the three-capped triangular prism, and C 9 h 12 NO 9 One nitrogen coordination atom and two oxygen coordination atoms in Tb come from 3-methyl-2-carboxypyridine, four oxygen coordination atoms come from oxalic acid, and two coordination oxygen atoms come from water molecules.

[0016] The oxalic acid-containing two-dimensional terbium coordination polymer green fluorescent material described in this embodiment has bright color and good stability, and can be left in the air for a long time without deterioration.

[0017] The two-dimensional terbium ...

specific Embodiment approach 2

[0021] Specific embodiment two: the preparation method of a kind of two-dimensional terbium coordination polymer green fluorescent material containing oxalic acid in this embodiment, carries out according to the following steps:

[0022] 1. Stirring and mixing: add Tb(NO 3 ) 3 ·5H 2 O, 3-methyl-2-carboxypyridine and oxalic acid, then by Tb(NO 3 ) 3 ·5H 2 The volume ratio of O, the total mass of 3-methyl-2-carboxypyridine and oxalic acid to water is (1~12) mg: 1mL, add water in the reactor, stir to make it mix uniformly, and obtain the mixture; Tb(NO 3 ) 3 ·5H 2 The mass ratio of O to oxalic acid is (0.3-42):1, and the mass ratio of the 3-methyl-2-carboxypyridine to oxalic acid is (0.1-12):1;

[0023] 2. Heating: Seal the reaction kettle containing the mixture obtained in step 1 and place it in an oven, heat it at a temperature of 80°C to 160°C for 24h to 96h, then slowly cool to room temperature, and open the reaction kettle to obtain colorless transparent block cryst...

specific Embodiment approach 3

[0030] Specific embodiment three: the difference between this embodiment and specific embodiment two is: in step one, add Tb (NO 3 ) 3 ·5H 2 O, 3-methyl-2-carboxypyridine and oxalic acid, then by Tb(NO 3 ) 3 ·5H 2 The volume ratio of the total mass of O, 3-methyl-2-carboxypyridine and oxalic acid to water was 8.5 mg: 1 mL, and water was added to the reactor. Others are the same as in the third embodiment.

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Abstract

The invention discloses an oxalate-containing two-dimensional terbium coordination polymer green fluorescent material and a preparation method of the oxalate-containing two-dimensional terbium coordination polymer green fluorescent material and relates to a green fluorescent material and a preparation method of the green fluorescent material. The invention aims to solve the problems that the conventional organic green luminous material is low in stability and the organic green luminous material prepared by the conventional method is low in yield. The oxalate-containing two-dimensional terbium coordination polymer green fluorescent material has the molecular formula of C9H12NO9Tb. The preparation method comprises the following steps of: 1, stirring and mixing; 2, heating; and 3, washing and drying, and thus obtaining the oxalate-containing two-dimensional terbium coordination polymer green fluorescent material. The oxalate-containing two-dimensional terbium coordination polymer green fluorescent material and the preparation method fo the oxalate-containing two-dimensional terbium coordination polymer green fluorescent material have the advantages that 1, the prepared oxalate-containing two-dimensional terbium coordination polymer green fluorescent material is bright in color and high in stability; 2, the method is simple and is easy to operate, the yield is up to 84-87 percent, and compared with the yield of 60-70 percent in the prior art, the yield is improved by over 14 percent. The method can be used for preparing the oxalate-containing two-dimensional terbium coordination polymer green fluorescent material.

Description

technical field [0001] The invention relates to a green fluorescent material and a preparation method thereof. Background technique [0002] Luminescence is a phenomenon in which an object directly converts energy absorbed in a certain way into non-equilibrium radiation without going through a thermal stage. Fluorescence refers to the radiation released when a substance is deactivated from an excited state to a low-energy state with the same multiplicity. The most basic condition for a compound to be able to fluoresce is that the energy absorbed by it for a transition with a constant multiplicity is less than the energy required to break the weakest chemical bond. [0003] Inorganic substances in green fluorescent materials for LED mainly include sulfide, aluminate, phosphate, borate and silicate, etc. Aluminate series luminescent materials are limited in application due to difficult post-processing of preparation, low yield and poor stability, while phosphate series phosph...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F5/00C09K11/06H01L51/54
Inventor 范瑞清肖朋李欣雨王平杨玉林曹文武杨彬
Owner HARBIN INST OF TECH
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