Ultra-thin two-dimensional spin-crossover nanometer material and preparation method and application thereof

A technology of spin crossover and nanomaterials, which is applied in the field of spin crossover materials and their preparation, and achieves the effects of simple and flexible preparation method, stable performance and good dispersion.

Inactive Publication Date: 2018-11-23
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the field of spin crossover research, there have been no reports on the combination of spin crossover metal-organic framework materials and ultrathin two-dimensional nanomaterials.

Method used

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  • Ultra-thin two-dimensional spin-crossover nanometer material and preparation method and application thereof
  • Ultra-thin two-dimensional spin-crossover nanometer material and preparation method and application thereof
  • Ultra-thin two-dimensional spin-crossover nanometer material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Example 1 Fe(SCN) 2 Alcoholic solution preparation

[0023] 0.5mmol of Fe(ClO 4 ) 2 ·6H 2 O and 1.0 mmol of KSCN were dissolved in 30 mL of methanol in a nitrogen atmosphere, stirred for 20 min, and filtered to remove the resulting white precipitate KClO 4 , the obtained filtrate is Fe(SCN) 2 methanol solution.

Embodiment 2

[0024] Example 2 Fe(SeCN) 2 Alcoholic solution preparation

[0025] 0.5mmol of Fe(ClO 4 ) 2 ·6H 2 O and 1.0 mmol of KSeCN were dissolved in 35 mL of ethanol in a nitrogen atmosphere, stirred for 30 min, and filtered to remove the resulting white precipitate KClO 4 , the obtained filtrate is Fe(SeCN) 2 weak.

Embodiment 3

[0026] Example 3 Three-dimensional van der Waals complex Fe(SCN) 2 (1,3-bis(4-pyridyl)propane) 2 synthesis

[0027] The Fe(SCN) that embodiment 1 obtains 2 Methanol solution was added to 20 mL of methanol solution dissolved with 1.0 mmol ligand 1,3-bis(4-pyridyl)propane in a nitrogen atmosphere, and the solution immediately turned bright yellow, accompanied by the precipitation of a bright yellow solid. The formed suspension solution was stirred for 0.5-1h and then filtered to obtain a bright yellow solid, which was washed with 10 mL of methanol to obtain a pure three-dimensional van der Waals complex Fe(SCN) 2 (1,3-bis(4-pyridyl)propane) 2 , the crystal structure see figure 1 .

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Abstract

The invention discloses a preparation method of an ultra-thin two-dimensional spin-crossover nanometer material. The ultra-thin two-dimensional spin-crossover nanometer material is obtained by dispersing a three-dimensional van der waals complex in a solvent for ultrasonic exfoliation, wherein a structure formula of the three-dimensional van der waals complex is Fe(XCN)2(1,3-bis(4-pyridyl)propane)2, and X is selected from S or Se. The invention further discloses the ultra-thin two-dimensional spin-crossover nanometer material prepared through the preparation method and application in preparinga molecular electronic device used for information storage or a molecular switch or molecular display thereof. The thickness of the ultra-thin two-dimensional spin-crossover nanometer material is about 1-10 nm, and by means of the ultra-thin two-dimensional structure, multistep spin-crossover behaviour is achieved; the ultra-thin two-dimensional spin-crossover nanometer material is simple to prepare, good in dispersion and stable in performance and has huge application prospects in the molecular electronic device aspect of information storage, molecular switches, molecular display and the like.

Description

technical field [0001] The invention relates to a spin crossing material and its preparation method and application, in particular to an ultrathin two-dimensional spin crossing nanometer material and its preparation method and application. Background technique [0002] Spin-crossed materials are one of the most attractive bistable materials, which refer to the high-spin and low-spin states of transition metal ions that occur under specific external stimulus conditions (such as temperature, pressure, light radiation, guest molecules, etc.) conversion between each other. This conversion will be accompanied by a series of magnetic, electronic, optical, thermal and other performance changes. This excellent characteristic makes spin crossing materials have attractive application prospects in the fields of new information storage devices, molecular switches, display devices, and detector devices at the molecular level (J.Am.Chem.Soc.2018, 140, 98 -101). In order to achieve the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F15/02B82Y40/00
CPCB82Y40/00C07F15/025
Inventor 罗洋辉陈晨洪丹丽何晓彤孙柏旺
Owner SOUTHEAST UNIV
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