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A method for the preparation of two-dimensional organic single crystals based on the synergistic effect of supramolecular "attraction-repulsion"

A synergistic effect and supramolecular technology, applied in the direction of single crystal growth, single crystal growth, chemical instruments and methods, etc., can solve the problems that affect the application prospects of two-dimensional organic single crystals, lack of molecular design strategies, etc., and achieve low cost and easy operation. Simple, sharp-edged effects

Active Publication Date: 2022-08-02
NANJING TECH UNIV
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Problems solved by technology

However, due to the complexity and variability of organic molecules, molecular design strategies for two-dimensional organic single crystals are extremely scarce, which seriously affects the application prospects of two-dimensional organic single crystals in optoelectronic devices.

Method used

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  • A method for the preparation of two-dimensional organic single crystals based on the synergistic effect of supramolecular "attraction-repulsion"
  • A method for the preparation of two-dimensional organic single crystals based on the synergistic effect of supramolecular "attraction-repulsion"
  • A method for the preparation of two-dimensional organic single crystals based on the synergistic effect of supramolecular "attraction-repulsion"

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Embodiment 1

[0042] Example 1: Two-dimensional organic single crystal solution self-assembly experiment

[0043] First, prepare an aqueous solution of polyethylene oxide-polypropylene oxide-polyethylene oxide triblock copolymer P123 with a concentration of 1 mg / mL, prepare a 10 mL glass sample bottle, add a magnet, and add 5 mL of the prepared P123 aqueous solution ,stand-by.

[0044]Completely dissolve 1 mg of PF-Py molecules in 1 mL of tetrahydrofuran, and use a pipette to inject the tetrahydrofuran solution of PF-Py molecules into a glass containing P123 aqueous solution within 1-2 seconds under the condition that the magnetron rotates at a uniform speed. sample vial and agitate for 5-7 minutes. During this process, white flocs can be seen to the naked eye, and when the stirring is completed, a milky white liquid is formed. Take out the magnet, let the mixed solution stand at room temperature for about 48 hours, take out the solution into a centrifuge tube, centrifuge at 8000 r / min, a...

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Abstract

The invention discloses a molecular design strategy of a two-dimensional organic single crystal and its preparation and application. In this strategy, the molecules are composed of planar supramolecular fragments and non-planar sterically hindered fragments. The synergistic effect of supramolecular "attraction-repulsion" between the two effectively induces the two-dimensional self-assembly of such molecules, forming a kind of Amphiphilic layered stacked two-dimensional organic single crystals. The invention realizes the rational design of organic small molecules in the field of two-dimensional organic single crystal assembly. Through the corresponding single crystal analysis and other characterization methods, the growth mechanism of this two-dimensional organic single crystal material and the intrinsic relationship between the molecular structure and the two-dimensional morphology are confirmed. In addition, the 2D organic single crystals prepared by the strategy of the present invention also exhibit excellent optoelectronic integration properties. The present invention provides an efficient and versatile strategy for the preparation of two-dimensional organic semiconductor crystals, facilitating the design of organic semiconductor crystals for high-performance optoelectronics.

Description

technical field [0001] The invention belongs to the technical field of organic single crystal molecule preparation, and in particular relates to a molecular design strategy of a two-dimensional organic single crystal and its preparation and application. Background technique [0002] Since Novoselov et al. obtained graphene through mechanical exfoliation in 2004, two-dimensional materials have been favored by more and more scientific researchers, mainly because of their large specific surface area and special two-dimensional plane. The two-dimensional confinement effect brought by it has unlimited application potential in nano-photonics and other fields. In the past few decades, 2D materials have been prepared mainly from inorganic materials, such as black phosphorus, transition metal dichalcogenides, and hexagonal boron nitride. Recently, two-dimensional organic single crystals, as another new type of two-dimensional materials, have also received more and more attention fro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C30B29/54C30B29/64C30B7/06
CPCC30B29/54C30B29/64C30B7/06
Inventor 李银祥董雪梅刘举庆黄维
Owner NANJING TECH UNIV
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