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A kind of organometallic cobalt (ii) complex luminescent material and preparation method thereof

A technology of organic metals and luminescent materials, applied in luminescent materials, cobalt organic compounds, organic chemistry, etc., can solve the problems of poor luminous brightness, large luminous effect attenuation, and easy agglomeration of products, and achieve product phase Uniformity, easy separation and purification, high purity and high yield

Active Publication Date: 2018-06-29
HENGYANG NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The preparation of luminescent materials often adopts the high-temperature solid-state sintering method, which is the most traditional method, and the luminous effect of the obtained luminous body is good, but the energy consumption is high, the product is easy to agglomerate, and the luminous effect is greatly attenuated after crushing; the precipitation method, this method is insufficient. The disadvantage is that the luminous brightness of the product is not very good; the combustion method, this method is very promising, but the luminous intensity and brightness of the synthesized luminescent powder are only slightly stronger than the solid-phase sintering method

Method used

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  • A kind of organometallic cobalt (ii) complex luminescent material and preparation method thereof
  • A kind of organometallic cobalt (ii) complex luminescent material and preparation method thereof
  • A kind of organometallic cobalt (ii) complex luminescent material and preparation method thereof

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Effect test

Embodiment 1

[0025] 1. Luminescent material [Co 2 (bipy) 2 (dpa) 2 (H 2 O) 5 ].4H 2 Preparation of O:

[0026] The amount ratio of the substance is: 1:1.5:1 raw material CoSO 4 .7H 2 O (1mmol), biphenyldicarboxylic acid (1.5mmol) and bipyridine (1mmol), dissolved in 40mL of ethanol aqueous solution with a volume ratio of 1:1, adjusted the pH to slightly alkaline with ethylenediamine, at 65°C After reacting for 9 hours, cool down to room temperature naturally. After filtering, put the filtrate in an open container, seal the container mouth with a microporous plastic wrap, and let the solvent evaporate slowly at room temperature. After 4 weeks, orange-red crystals are precipitated. The yield was 41.5%.

[0027] 2. For materials [Co 2 (bipy) 2 (dpa) 2 (H 2 O) 5 ].4H 2 O for crystal structure determination:

[0028] A single crystal with a material size of 0.18×0.17×0.15nm was taken, and on a Bruker SMART APEX-II CCD single crystal diffractometer, the monochromatic MoKα (λ=0.071...

Embodiment 2

[0036] The molar ratio of the substance is: 1.2:1.5:1.5 raw material CoSO 4 .7H 2 O (1.2mmol), biphenyldicarboxylic acid (1.5mmol) and bipyridine (1.5mmol), dissolved in 40mL of ethanol aqueous solution with a volume ratio of 1.2:1, adjusted the pH value slightly alkaline with ethylenediamine, at 60 After reacting at ℃ for 10 hours, cool naturally to room temperature, filter, put the filtrate in an open container, seal the container mouth with a microporous plastic wrap, let the solvent evaporate slowly at room temperature, orange-red crystals precipitate out after 4 weeks. The yield was 40.8%.

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Abstract

The invention discloses an organic metal cobalt (II) complex luminescent material and a preparation method thereof. The complex luminescent material has the chemical formula of [Co2(bipy)(dpa)2(H2O)5].4H2O, wherein dpa is 2,2'-biphenyldicarbox ylic acid, and bipy is 2,2'-dipyridyl. The preparation method of the complex luminescent material comprises the steps that an ethyl alcohol / water solution containing cobaltous sulfate, 2,2'-biphenyldicarbox ylic acid and 2,2'-dipyridyl is adopted for adjusting the pH value to be meta-alkalescence, a reaction is performed, after the reaction is completed, cooling is performed to reach the room temperature, filtering is performed, and the obtained filtrate is subjected to volatilization and crystallization to obtain a complex single crystal. The preparation method is easy to implement, mild in condition and high in yield; the obtained complex luminescent material has a strong fluorescence-emission peak (lambda ex=379 nm) at the position of 335 nm, can be used for preparing a luminescent device, Stokes shift is large (lambda ex-lambda em=-44 nm), and the organic metal cobalt (II) complex luminescent material can be applied to fluorimetric determination.

Description

technical field [0001] The invention relates to an organometallic cobalt (II) complex luminescent material and a preparation method thereof, belonging to the field of luminescent material synthesis. technical background [0002] Luminescent materials have been widely used in high-tech fields such as communications, satellites, radars, displays, records, optical computers, and biomolecular probes. Among them, organometallic complex luminescent materials have the characteristics of high fluorescence quantum efficiency, good film-forming properties, easy purification, high melting point, stable properties, etc., and there are many kinds of organic molecules, which are conducive to the design and assembly of luminescent materials. increasingly attracting the attention of researchers. Therefore, designing and synthesizing new organometallic complex luminescent materials, studying their luminescent properties, and exploring the relationship between structure and luminescent prope...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07F15/06C09K11/06
CPCC07F15/065C09K11/06C09K2211/187
Inventor 陈志敏杨颖群毛芳芳
Owner HENGYANG NORMAL UNIV
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