Liquid crystal material, and preparation method and application thereof

A liquid crystal material and selected technology, applied in liquid crystal materials, chemical instruments and methods, optics, etc., can solve the problems of restricting the application of organic light-emitting materials, weakening light emission, restricting the application of light-emitting liquid crystal materials, etc., achieving mild conditions and easy operation. , good adaptability

Inactive Publication Date: 2019-01-11
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In a concentrated solution, aggregation-induced quenching (Aggreation-causedquenching, ACQ) occurs due to the formation of intermolecular aggregates, resulting in weak luminescence. This phenomenon greatly limits the application of organic light-emitting materials, especially for light-emitting liquid crystal materials.
[0003] The self-assembly of luminescent liquid crystal materials can form a liquid crystal phase, which is an ordered aggregate. The phenomenon of weak light emission due to aggregation greatly limits the application of luminescent liquid crystal materials.

Method used

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  • Liquid crystal material, and preparation method and application thereof
  • Liquid crystal material, and preparation method and application thereof
  • Liquid crystal material, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] This embodiment provides a liquid crystal material, the structural formula of the liquid crystal material is as follows:

[0057] It is called DPP-C6 for short.

[0058] The synthetic route of described DPP-C6 is as follows:

[0059]

[0060] Described preparation method comprises the steps:

[0061] Add 50 mL of acetic acid, 5.0 g (0.023 mol) of n-hexyl aminobenzoate, 2.4 g (0.023 mol) of benzaldehyde, and 0.40 g (0.0023 mol) of p-toluenesulfonic acid into the reaction flask in sequence. After the above mixed solution was heated to 90° C. and stirred for 30 min, 0.97 g (0.0113 mol) of 2,3-butanedione was added dropwise. After the dropwise addition was completed, the stirring reaction was continued for 3 h. After the reaction, the reaction solution was cooled to room temperature and subjected to suction filtration, and the filter cake was repeatedly washed with acetic acid. The obtained crude product filter cake was recrystallized with a mixed solution of dichlo...

Embodiment 2

[0067] This embodiment provides a liquid crystal material, the structural formula of the liquid crystal material is as follows:

[0068] It is called DPP-C7 for short.

[0069] The synthetic route of the DPP-C7 is as follows:

[0070]

[0071] Described preparation method comprises the steps:

[0072] Add 50 mL of acetic acid, 5.4 g (0.023 mol) of n-heptyl 4-aminobenzoate, 2.4 g (0.023 mol) of benzaldehyde, and 0.40 g (0.0023 mol) of p-toluenesulfonic acid into the reaction flask. After the above mixed solution was heated to 90° C. and stirred for 30 min, 0.97 g (0.0113 mol) of 2,3-butanedione was added dropwise. After the dropwise addition was completed, the stirring reaction was continued for 3 h. After the reaction, the reaction solution was cooled to room temperature and subjected to suction filtration, and the filter cake was repeatedly washed with acetic acid. The obtained crude product filter cake was recrystallized with a mixed solution of dichloromethane and e...

Embodiment 3

[0078] This embodiment provides a liquid crystal material, the structural formula of the liquid crystal material is as follows:

[0079] It is called DPP-C8 for short.

[0080] The synthetic route of described DPP-C8 is as follows:

[0081]

[0082] Described preparation method comprises the steps:

[0083] Add 50 mL of acetic acid, 5.7 g (0.023 mol) of n-octyl 4-aminobenzoate, 2.4 g (0.023 mol) of benzaldehyde, and 0.40 g (0.0023 mol) of p-toluenesulfonic acid in the reaction flask. After the above mixed solution was heated to 90° C. and stirred for 30 min, 0.97 g (0.0113 mol) of 2,3-butanedione was added dropwise. After the dropwise addition was completed, the stirring reaction was continued for 3 h. After the reaction, the reaction solution was cooled to room temperature and subjected to suction filtration, and the filter cake was repeatedly washed with acetic acid. The obtained crude product filter cake was recrystallized with a mixed solution of dichloromethane an...

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Abstract

The invention relates to the technical field of liquid crystal materials, and especially relates to a luminescent liquid crystal material having an AIE (aggregation-induced emission) performance, anda preparation method and an application thereof. The structural formula of the liquid crystal material is shown in the description; and in the formula, R1, R2, R3 and R4 are respectively independentlyselected from hydrogen, and aliphatic or aromatic functional groups. The liquid crystal material comprises a core structure having the AIE performance, is heated to thaw and then is cooled to a certain temperature in order to form an ordered liquid crystal phase, and the core structure having the AIE property still can efficiently emit lights after forming the liquid crystal phase aggregation, sothe problem of luminescence weakening caused by aggregation of the luminescent liquid crystal phase in the prior art is solved.

Description

technical field [0001] The invention relates to the technical field of liquid crystal materials, in particular to a luminescent liquid crystal material with AIE performance and a preparation method and application thereof. Background technique [0002] Light is indispensable to human beings, and efforts have been made to develop a wide variety of organic light-emitting materials. Traditional organic light-emitting materials can be considered as isolated molecules without intermolecular interactions in dilute solutions, so they can emit light efficiently. In a concentrated solution, aggregation-induced quenching (Aggreation-causedquenching, ACQ) occurs due to the formation of intermolecular aggregates, resulting in weak luminescence. This phenomenon greatly limits the application of organic light-emitting materials, especially for light-emitting liquid crystal materials. . [0003] The self-assembly of luminescent liquid crystal materials can form a liquid crystal phase, wh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D487/04C09K19/34G02F1/13
CPCC07D487/04C09K19/3477G02F1/13
Inventor 佟斌戴双雄彭喆季迎春王智董宇平石建兵蔡政旭
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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