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Construction method of metal-organic coordination structure

A metal and coordination technology, applied in metal material coating process, vacuum evaporation plating, coating and other directions, can solve the problems of limiting the practical application of materials, single electrical and magnetic properties, etc., and achieve rich electrical properties and preparation technology. Simple and controllable, high response rate effect

Active Publication Date: 2021-11-09
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the organometallic coordination structure containing only a single coordination bond has single electrical and magnetic properties, which limits the practical application of the material.

Method used

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  • Construction method of metal-organic coordination structure
  • Construction method of metal-organic coordination structure
  • Construction method of metal-organic coordination structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Step 1: Deposit 3-bromo-2-naphthol molecules on the surface of Au(111) at room temperature, with a deposition current of 0.4A, a deposition time of 40s, a deposition temperature of 25.1-25.3°C, and a substrate temperature of 298.16K-298.44K;

[0025] Step 2: The formed self-assembly was observed on the surface by scanning tunneling microscopy (STM), and its structure was a flower-like self-assembled structure, such as figure 2 shown.

Embodiment 2

[0027] Step 1: deposit 3-bromo-2-naphthol molecules on the surface of Au(111), deposition current 0.4A, deposition time 3min, deposition temperature 25.1-25.3°C, substrate temperature 348K;

[0028] Step 2: introduce iron metal source, deposit iron atoms onto the Au(111) surface with 3-bromo-2-naphthol molecules, deposition voltage 1.5kV, deposition current 0.4A, iron deposition time 60s, deposition temperature 25.5- 26.2℃;

[0029] Step 3: After the deposition is completed, the sample is annealed, the annealing current is 1.8A, and the final annealing temperature is 348K;

[0030] Step: 4: After the annealing is completed, the formation of a coordination network structure and long chains is observed on the surface by scanning tunneling microscopy (STM), wherein the structural unit of the coordination network structure is a trimer, such as image 3 shown.

Embodiment 3

[0032] Similar to Example 2, the difference is that the deposition time in step 1 is 1.5min, the substrate temperature is 350K, the iron atom deposition temperature in step 2 is 25.8-26.3°C, the iron atom deposition time is changed to 80s, and the The annealing temperature is changed to 385K, and the STM image observed after processing step 4 is as follows Figure 4 As shown, it can be seen that the transformation of the coordination grid structure into a long chain is observed, that is, the formation of 3-bromo-2-naphthol molecule dehalogenation and coupling through the two metal- Novel metal-organic nanostructures formed by organic coordination bonds.

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Abstract

The invention discloses a construction method of a metal-organic coordination structure. The construction method realizes the construction of the metal-organic coordination structure by controllably introducing metal atoms with specific types and concentrations on the surface and regulating and controlling the proportion of molecules to the metal atoms, halogenated naphthol molecules and iron atoms are co-deposited on the surface and annealed at a specific temperature to form the metal-organic coordination structure with O-Fe-O and C-Fe-C coordination bonds, and compared with the metal-organic coordination structure only containing a single coordination bond in the past, the coordination structure has more special and complicated electrical and magnetic properties, and meanwhile, the structure has more reaction active sites and has a wider potential application prospect in the fields of catalysis, molecular recognition and the like.

Description

technical field [0001] The invention relates to a construction method of a novel metal-organic coordination structure. Background technique [0002] In recent decades, molecular surface self-assembly and surface reactions have been widely used in nanoscale surface functionalization and patterning, which are further used in functional nanomaterials and organic electronics. With the development of surface science and technology, Scanning Tunneling Microscope (STM) has played a huge role as a surface reaction observation and analysis tool. It can obtain images of surface atomic arrangement in real space and related electronic properties in real time. Morphology and physical and chemical phenomena related to surface electronic behavior. With the help of the precise imaging function and powerful spectroscopy function of the scanning tunneling microscope, the route of the entire surface reaction and the mechanism behind it can be more intuitively recognized. [0003] Surface sel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C14/12C23C14/16C23C14/58
CPCC23C14/12C23C14/16C23C14/58
Inventor 于丹欧阳佐柃孔惠慧钟秦
Owner NANJING UNIV OF SCI & TECH
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