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a c-based 3 Luminescent liquid crystal material with symmetrical structure and preparation method thereof

A technology of liquid crystal materials and symmetry, which is applied in the preparation of luminescent materials, liquid crystal materials, and carbon-based compounds. It can solve the problems that luminescent liquid crystal materials cannot have both liquid crystallinity and AIE/AIEE effects, and achieve increased brightness and simplified device structure. , easy-to-achieve effects

Active Publication Date: 2022-05-10
SHENZHEN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In view of above-mentioned deficiencies in the prior art, the object of the present invention is to provide a kind of based on C 3 A luminescent liquid crystal material with a symmetrical structure and a preparation method thereof, aiming to solve the problem that the luminescent liquid crystal material prepared by the existing preparation method cannot have both liquid crystallinity and AIE / AIEE effects

Method used

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  • a c-based <sub>3</sub> Luminescent liquid crystal material with symmetrical structure and preparation method thereof
  • a c-based <sub>3</sub> Luminescent liquid crystal material with symmetrical structure and preparation method thereof
  • a c-based <sub>3</sub> Luminescent liquid crystal material with symmetrical structure and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0050] (1) Ar is The preparation of intermediate 1, its preparation route is The specific preparation steps are: take a 50mL two-necked flask, put it into a magnet, add 2.0g (9.65mmol) of reactant X1, start stirring, carry out vacuuming and blowing nitrogen for 3 times, dissolve it with 20mL chloroform, and put it in an ice bath. , slowly added 2.56mL (28.95mmol) of trifluoromethanesulfonic acid with a constant pressure funnel, stirred for 1h; continued to stir after returning to room temperature, then heated to reflux for 12h, and monitored the progress of the reaction with a TLC plate; 3 Saturated solution quenched trifluoromethanesulfonic acid, then the mixture was filtered, and the resulting solid was washed 3 times with n-hexane, water, and dichloromethane respectively to obtain a yellow-brown powder (collect the filtrate and washing liquid, and the resulting organic layer was washed with dichloromethane After extraction, it was collected by spin-drying, most of which ...

Embodiment 2

[0055] (1) Prepare a luminescent liquid crystal material with the intermediate 1 (Y1-1) and intermediate 2 (Y2-1) obtained in Example 1 as substrates. The specific preparation steps are: in a 100mL single-necked flask, put a magnet, Add 186mg (0.30mmol) of intermediate 1 (Y1-1), 566mg (1.08mmol) of intermediate 2 (Y2-1), inject 40mL of absolute ethanol (EtOH), and 15mL of tetrahydrofuran (THF) to promote the dissolution of the reactant; room temperature conditions Stir under the pressure, then weigh 0.35 g of NaOH solid, slowly add it to the flask several times, then cover the stopper, and tie the needle of the syringe to keep the air pressure balance; use the TLC plate to monitor the progress of the reaction, and add 10wt% NaOH after the reaction is completed. dilute hydrochloric acid to adjust the pH value, and use pH test paper to detect that it is neutral; then spin the solvent dry, add an appropriate amount of chloroform to dissolve it ultrasonically, transfer it to a sepa...

Embodiment 3

[0060] (1) Prepare the luminescent liquid crystal material with the intermediate 1 (Y1-1) and intermediate 2 (Y2-2) obtained in the embodiment as the substrate, the specific preparation steps are the same as the Z-1-1 in the embodiment 2, and the obtained The luminescent liquid crystal material is a yellow solid with a yield of 28%. The luminescent liquid crystal material obtained in this example is named Z1-2. The structural characterization data of Z1-2 is 1 H NMR (400MHz, Chloroform-d) δ7.90(dd, J=14.4, 8.1Hz, 12H), 7.66(dd, J=24.1, 8.3Hz, 18H), 7.43(s, 3H), 7.02(s, 6H),6.61(s,6H),4.97(s,6H),3.95(s,18H),1.77(s,24H),1.45(s,124H),0.86(s,27H). 13 C NMR(100MHz,Chloroform-d)δ153.5,139.4,131.5,129.8,128.2,127.7,127.5,127.3,115.5,111.6,106.2,73.6,70.7,69.3,32.1,30.5,29.7,29.8,23,228.6 , 14.3.

[0061] (2) the liquid crystallinity of Z1-2 that this embodiment makes is tested: the TGA result of Z1-2 is as follows Figure 5a As shown, when the temperature reaches 327°C, the sampl...

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Abstract

The invention discloses a C-based 3 A luminescent liquid crystal material with a symmetrical structure and a preparation method thereof. The general structural formula of the luminescent liquid crystal material is wherein, Ar is or R is selected from one of alkyl groups with 6 to 12 carbon atoms. The luminescent liquid crystal material of the present invention has the AIE / AIEE effect and liquid crystallinity at the same time, which solves the contradiction between the ACQ phenomenon of traditional luminescent materials and the premise that aggregation and self-assembly are the prerequisites for forming liquid crystal phases. It is applied to liquid crystal display devices, which can simplify the The device structure increases brightness, contrast and energy efficiency, which is expected to make liquid crystal displays thinner, lighter and more energy-saving; the luminescent liquid crystal material of the present invention also has mechanochromic properties, which provides the possibility to further broaden its use. The preparation method of the luminescent liquid crystal material of the invention is simple and easy to realize.

Description

technical field [0001] The invention relates to the field of luminescent liquid crystal materials, in particular to a C-based 3 A luminescent liquid crystal material with a symmetrical structure and a preparation method thereof. Background technique [0002] As a special functional material, liquid crystal has penetrated into all walks of life and all aspects of social life with the development of display technology; however, traditional liquid crystal materials do not emit light by themselves. , Color filter film, which greatly reduces the brightness and energy efficiency of the display. [0003] Traditional fluorescent molecules are generally hydrocarbon aromatic compounds. These highly conjugated molecules emit strong fluorescence in the solution system, but when the solution concentration is too high or aggregated and precipitated, the fluorescence intensity usually drops sharply or even does not emit light at all. This phenomenon is called Aggregation-Caused Quenching...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D251/24C07C255/37C07C253/30C07C253/34C07C47/546C07C45/68C09K11/06C09K19/34C09K19/12
CPCC07D251/24C07C255/37C07C253/30C07C253/34C07C45/68C09K11/06C09K19/34C09K19/12C09K2211/1007C09K2211/1059C09K2019/123C07C47/546
Inventor 余振强孟振功欧阳旭付阔韦卓勋
Owner SHENZHEN UNIV
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