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A kind of preparation method of solid-state luminescent carbonized polymer dot liquid crystal

A technology of polymer dots and solid-state luminescence, which is applied in chemical instruments and methods, luminescent materials, liquid crystal materials, etc., can solve the problems of limiting the practical application of carbonized polymer dots, no fluorescence emission, etc., and achieves rich variety, low production cost, The effect of simple operation of the experiment

Active Publication Date: 2022-03-25
XIANGTAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when the carbonized polymer dots are in the solid state, the carbonized polymer dots in the excited state dissipate energy through non-radiative forms such as strong intermolecular forces due to the too close distance between the fluorophore and the fluorophore, which manifests as No or very weak fluorescence emission
Therefore, the practical application of carbonized polymer dots is greatly limited.

Method used

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  • A kind of preparation method of solid-state luminescent carbonized polymer dot liquid crystal
  • A kind of preparation method of solid-state luminescent carbonized polymer dot liquid crystal
  • A kind of preparation method of solid-state luminescent carbonized polymer dot liquid crystal

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Embodiment 1

[0045] A preparation method of cyanobiphenyl solid-state luminescent carbonized polymer dot liquid crystal, comprising the following steps:

[0046] (1) Synthesis of Carbonized Polymer Dots (CPDs)

[0047] The synthetic route is shown in the following formula (a):

[0048]

[0049] Raw materials: deionized water, citric acid, ethylenediamine;

[0050] First, citric acid (12.6g, 0.06mol), ethylenediamine (16.08g, 0.268mol) were added to the reaction kettle lined with polytetrafluoroethylene, then 20ml of water was added, and the reaction kettle was placed in an oven at 200 ° C The reaction was carried out for 8h. After the reaction was completed, the reaction kettle was taken out from the oven and cooled to room temperature to obtain a black liquid crude product. The crude product was loaded into a dialysis bag with a molecular weight cut-off of 300, and dialyzed 10 times in a beaker containing 500ml of deionized water, and continuously The deionized water in the beaker w...

Embodiment 2

[0062] A preparation method of biphenyl solid-state luminescent carbonized polymer dot liquid crystal, comprising the following steps:

[0063] (1) Synthesis of Carbonized Polymer Dots (CPDs)

[0064] The synthetic route is shown in the following formula (d):

[0065]

[0066] Raw materials: deionized water, citric acid, ethylenediamine;

[0067] First, citric acid (12.6 g, 0.06 mol), ethylenediamine (16.08 g, 0.268 mol) were added to a Teflon-lined reaction kettle, and the reaction kettle was placed in an oven at 200 °C for 8 h. After the reaction is completed, take out the reactor and cool it to room temperature to obtain a black liquid crude product, put the crude product into a dialysis bag with a molecular weight cut-off of 300, dialyze 10 times in a beaker containing 500 ml of deionized water, and constantly replace the beaker. The time interval of changing the water in turn is 15min, 15min, 15min, 30min, 30min, 30min, 2h, 2h, 12h, and then use the rotary evaporator...

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Abstract

The invention discloses a method for preparing a solid-state luminescent carbonized polymer dot liquid crystal. Firstly, carbonized polymer dots were prepared by a one-step hydrothermal method, and then carbonized polymer dots with solid-state luminescence were prepared by modifying carbonized polymer dots with different mesogens through flexible spacers. Compared with the traditional solid-state non-luminescent carbonized polymer dots, this kind of mesogen-modified carbonized polymer dots (CPD‑LC) can emit strong fluorescence in the solid state and has liquid crystallinity. The method is cheap to prepare, has excellent biocompatibility, and exhibits good solubility in both aqueous and organic solvents. At the same time, due to the excellent optical stability and unique photophysical properties of the carbonized polymer, it is suitable for cell imaging. , drug delivery, optoelectronic devices, analysis and detection, fluorescent ink, photocatalysis and other aspects have potential application value.

Description

technical field [0001] The invention relates to the fields of organic synthesis and polymer chemistry, and more particularly, to a method for preparing solid-state light-emitting carbonized polymer dot liquid crystals. Background technique [0002] Carbonized polymer dots are an emerging fluorescent nanomaterial with carbon as the basic structural unit, and its size is usually between 2 and 10 nm. The center is usually a crystalline sp2 or amorphous sp3 hybridized carbon nucleus, and the surface is composed of a variety of functional groups, including epoxy, carbonyl, carboxyl, and hydroxyl groups, which enable carbonized polymer dots to perform well. dispersed in an aqueous solution. Due to their interesting and unique advantages, such as chemical stability, excellent dispersion in water, low photobleaching, biocompatibility and low toxicity, they are a new generation of luminescent materials. However, when the carbonized polymer dots are in the solid state, the distance ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/65C09K11/02C09K11/06C09K19/52C09K19/12C01B32/15
CPCC09K11/65C09K11/025C09K11/06C09K19/52C09K19/12C01B32/15C09K2019/521C09K2019/122C09K2211/1007
Inventor 谢鹤楼朱基春刘鹏祥
Owner XIANGTAN UNIV
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