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Long-service-life underwater organic room-temperature phosphor material as well as preparation method thereof and application thereof

A room temperature phosphorescence, long-life technology, applied in luminescent materials, chemical instruments and methods, nanotechnology for materials and surface science, etc., to achieve the effect of environmental friendliness, low cost, and inhibition of triplet non-radiative transitions

Inactive Publication Date: 2018-06-08
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the prepared carbon quantum dot composites usually have fluorescent properties, and few people have prepared underwater phosphorescent carbon quantum dot composites

Method used

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  • Long-service-life underwater organic room-temperature phosphor material as well as preparation method thereof and application thereof
  • Long-service-life underwater organic room-temperature phosphor material as well as preparation method thereof and application thereof
  • Long-service-life underwater organic room-temperature phosphor material as well as preparation method thereof and application thereof

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Experimental program
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Effect test

Embodiment 1

[0031] This embodiment provides an underwater organic room temperature phosphorescent material, and its preparation method can refer to figure 1 As shown, it specifically includes the following steps:

[0032] (1) The urea of ​​1g citric acid and 0.5g is dissolved in the deionized water of 25ml, obtains mixed solution;

[0033] (2) Place the mixed solution obtained in (1) in a 50ml polytetrafluoroethylene autoclave, and react at 250°C for 10 hours to obtain the carbon quantum initial solution;

[0034] (3) The initial solution of (2) is 9500rpm at a rotating speed, and the centrifugation time is 20 minutes to remove the black precipitate, take the upper layer of brownish-yellow clear liquid, and freeze-dry for 72 hours to obtain black carbon quantum dot powder, which is made into 6mg / ml Carbon quantum dot solution;

[0035] (4) Get 0.5ml step (3) gained carbon quantum dot aqueous solution and 3g cyanuric acid to mix and dissolve in 20ml water, and stir 10 hours at room tempe...

Embodiment 2

[0040] This embodiment provides an underwater organic room temperature phosphorescent material, which is prepared by the following method:

[0041] (1) The urea of ​​1g citric acid and 0.5g is dissolved in the deionized water of 25ml, obtains mixed solution;

[0042] (2) The mixed solution obtained in (1) was placed in a 50 ml polytetrafluoroethylene autoclave, and reacted at 250° C. for 10 hours to obtain a carbon quantum initial solution.

[0043] (3) The initial solution of (2) is 9500rpm at a rotating speed, and the centrifugation time is 20 minutes to remove the black precipitate, take the upper layer of brownish-yellow clear liquid, and freeze-dry for 72 hours to obtain carbon quantum dot powder, which is made into 6mg / ml carbon Quantum dot solution.

[0044] (4) Get 3ml step (3) gained carbon quantum dot aqueous solution and 3g cyanuric acid to mix and dissolve in 20ml water, and stir 10 hours at room temperature, obtain reaction mixture;

[0045] (5) centrifuging the...

Embodiment 3

[0047] This embodiment provides an underwater organic room temperature phosphorescent material, which is prepared by the following method:

[0048] (1) The urea of ​​1g citric acid and 0.5g is dissolved in the deionized water of 25ml, obtains mixed solution;

[0049] (2) The mixed solution obtained in (1) was placed in a 50 ml polytetrafluoroethylene autoclave, and reacted at 250° C. for 10 hours to obtain a carbon quantum initial solution.

[0050](3) The initial solution of (2) is 9500rpm at a rotating speed, and the centrifugation time is 20 minutes to remove the black precipitate, take the upper layer of brownish-yellow clear liquid, and freeze-dry for 72 hours to obtain carbon quantum dot powder, which is made into 6mg / ml carbon Quantum dot solution.

[0051] (4) Get 8ml step (3) gained carbon quantum dot aqueous solution and 2g cyanuric acid to mix and dissolve in 20ml water, and stir 10 hours at room temperature, obtain reaction mixture;

[0052] (5) centrifuging the ...

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Abstract

The invention discloses a long-service-life underwater organic room-temperature phosphor material and a preparation method thereof. The method provided by the invention takes water as a medium, and sufficiently stirs fluorescent molecules and a water dispersion substrate adhered with bound water on surface at the room temperature to form the phosphor material. The room-temperature phosphor material prepared by the preparation method can emit phosphorescence under a water phase, has an average service life of 687 ms, solves the problem that an underwater phosphor material in the prior art is short of preparation raw materials, and is relatively poor in optical property, and provides a general technology for preparing the phosphor material through multiple hydrogen bondings.

Description

technical field [0001] The invention belongs to the technical field of luminescent materials, and in particular relates to long-life underwater organic room-temperature phosphorescent materials. Background technique [0002] Phosphorescence has a large Stokes shift and a long decay lifetime, so it has important application value in the fields of biological cell imaging and security anti-counterfeiting. However, underwater phosphorescent materials are usually difficult to prepare, which greatly limits the application of phosphorescent materials in aqueous environments. Although there are a small amount of materials that can achieve underwater phosphorescence emission, their preparation process is cumbersome and complicated, and usually requires repeated separation and purification; the synthesis conditions are strict and harsh, and usually require high temperature, high pressure, anaerobic, and anhydrous conditions; The use of toxic and volatile organic solvents severely lim...

Claims

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Application Information

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IPC IPC(8): C09K11/65C09K11/02B82Y20/00B82Y30/00B82Y40/00
CPCB82Y20/00B82Y30/00B82Y40/00C09K11/025C09K11/65
Inventor 周明李奇军
Owner TSINGHUA UNIV
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