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Organic charge transfer eutectic and preparation method and application thereof

A charge-transfer, organic technology, applied in the field of organic charge-transfer eutectics and their preparation, to achieve the effects of simple preparation methods, broadened applications, and excellent photothermal conversion efficiency

Active Publication Date: 2022-03-01
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the development of stable organic charge-transfer co-crystals with full-spectrum absorption is important and challenging for efficient solar-thermal energy conversion.

Method used

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  • Organic charge transfer eutectic and preparation method and application thereof
  • Organic charge transfer eutectic and preparation method and application thereof
  • Organic charge transfer eutectic and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] ABTS +· The preparation method of solution comprises the steps:

[0062] Dilute hydrochloric acid aqueous solution to obtain a weak acid solution with pH 4; use water as a solvent to prepare 50 mM negative divalent 2,2'-azino-bis-3-ethylbenzothiazoline-6-sulfonic acid (ABTS 2- ) solution, stored at 4°C; dilute the Ru@G nanoparticles to 0.1 μg / mL. In a 50mL centrifuge tube, add 39.5mL of pH 4 diluted hydrochloric acid aqueous solution, then add 300μL of 50mM ABTS 2- solution, 200 μL 1M H 2 o 2 , 40μL 100μg / mL Ru@G, shake evenly, the solution gradually changes from colorless to green, and Ru@G and ABTS +· Green mixed solution; after standing for 12 hours, collect ABTS by centrifugation +· Green solution, the centrifugal speed is 10000rpm. to ABTS +· To characterize, the resulting graph figure 1 shown; where, a) is ABTS +· The UV-Vis-NIR absorption spectrum; b) is ABTS +· electron paramagnetic resonance spectrum. It can be seen that the obtained ABTS +· The ult...

Embodiment 2

[0064] Organic charge-transfer co-crystals based on persistent cationic radicals were prepared as follows:

[0065] Collect all ABTS in embodiment 1 +· The solution was added to a 20mL serum bottle, and then 2mL of 10mM M TMB mother solution was added. The TMB mother solution was TMB dissolved in ethanol. The color changed rapidly from green to blue, and gradually formed flocculents. Finally, a large amount of blue-green eutectic precipitated at the bottom of the bottle, and the crystals were collected, and then freeze-dried to obtain organic charge transfer eutectic TAHC powder.

[0066] Structural elucidation of organic charge-transfer eutectic TAHC, such as figure 2 Shown, wherein a) is the SEM image of TAHC; b) is the TEM image of TAHC; c) is the selected area electron diffraction of TAHC; d) is the powder X-ray diffraction spectrum of TAHC and TMB; e) is the crystal of TAHC Structural Analysis Diagram. It can be seen that the prepared eutectic presents a one-dimension...

Embodiment 3

[0068] The preparation method of the organic charge-transfer co-crystal based on common acceptors is the same as that in Example 2, the difference is to compare the influence of different types of acceptors on the absorption properties of the charge-transfer co-crystal.

[0069] The ABTS of embodiment 2 +· The solution was changed to 1,2,4,5-tetracyanobenzene (TCNB) solution, and the mass ratio of TMB to TCNB was 1:1; a TMB-TCNB charge-transfer cocrystal (TTC) was obtained as a cationic radical acceptor control.

[0070] The TMB-TCNB charge-transfer eutectic was tested by UV-visible-near-infrared absorption spectrum, and the experimental results ( Figure 4 ) shows that the absorption of TTC eutectic can only reach 1000nm. It fully demonstrates that in the case of the same donor, the type of acceptor will have a huge impact on the properties of the formed charge transfer, especially the UV-Vis-NIR absorption, and then affect their photothermal performance.

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Abstract

The invention belongs to the field of organic charge transfer co-crystals, and particularly relates to an organic charge transfer co-crystal based on a persistent cationic free radical receptor as well as a preparation method and application of the organic charge transfer co-crystal. The invention relates to an organic charge transfer eutectic, which is a one-dimensional organic charge transfer eutectic formed by interaction of TMB, ABTS +. And water molecules. The absorption spectrum of the organic charge transfer eutectic crystal is 300 to 2500nm; porous polyurethane with a low heat conductivity coefficient is selected as a frame material, interface solar heat conversion is facilitated, heat energy is efficiently utilized to realize evaporation of water molecules, and the composite material has a wide application prospect in the aspect of solar-driven seawater desalination.

Description

technical field [0001] The invention belongs to the field of organic charge transfer eutectics, in particular to organic charge transfer eutectics based on persistent cationic free radical acceptors and their preparation methods and applications. Background technique [0002] As a clean renewable energy, solar energy has huge energy and is not limited by mining, transportation and storage conditions. It has been widely used in solar photovoltaic and solar thermal. Solar photovoltaic refers to the use of the photovoltaic effect of the semiconductor interface to directly convert light energy into electrical energy; while solar thermal refers to the use of solar absorbers to convert light energy into heat energy. Compared with solar photovoltaics, solar thermal has higher conversion efficiency due to its ability to utilize a wider bandwidth within the solar spectrum (almost the entire solar spectrum). In recent years, solar photothermal technology has attracted much attention ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D277/82C07C211/50C07C209/84C08J9/00C08L75/08C08K5/47C08K5/18F24S20/00F22B1/00C02F1/14
CPCC07D277/82C07C211/50C08J9/0033C08J9/0028F24S20/00F22B1/006C02F1/14C08J2375/08C07B2200/13Y02E10/40Y02A20/124Y02A20/142Y02A20/212Y02P20/10
Inventor 陈卓许洁琼柯英松陈倩
Owner HUNAN UNIV
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