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Coordination layer-by-layer self-assembly of terpyridyl covalent modified multi-wall carbon nanotube and transition metal ion on functional substrate surface

A technology of multi-walled carbon nanotubes and transition metal ions, which is applied in the fields of nanomaterials, functional materials, and supramolecular self-assembly chemistry. The surface layer of carbon nanotubes has not been able to achieve conjugation and other problems

Inactive Publication Date: 2011-01-26
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, terpyridine and the sidewall of carbon nanotubes are connected by ionic bonds or coordination bonds through other bridging bodies (such as carboxylic acid groups), and its stability is particularly susceptible to environmental influences, and terpyridine groups and carbon nanotubes The connection of the tube surface is also not able to realize the conjugation
These will affect the effective electron transport between the terpyridine group and the carbon nanotubes, thereby reducing their optical or electrical properties

Method used

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  • Coordination layer-by-layer self-assembly of terpyridyl covalent modified multi-wall carbon nanotube and transition metal ion on functional substrate surface
  • Coordination layer-by-layer self-assembly of terpyridyl covalent modified multi-wall carbon nanotube and transition metal ion on functional substrate surface
  • Coordination layer-by-layer self-assembly of terpyridyl covalent modified multi-wall carbon nanotube and transition metal ion on functional substrate surface

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] In the first step, in a 100ml round bottom flask, dissolve 10mg of pure multi-walled carbon nanotubes in 50ml of acetonitrile, and disperse them fully by ultrasonication for 30min. liquid.

[0028] In the second step, under stirring, add the suspension of MWCNTs ultrasonically treated in the first step into 50 ml of Diazo-tpy / acetonitrile solution with a concentration of 0.2 mg / ml using a dropper. The reaction was stirred at 0°C and protected from light for 48 hours, so that Diazo-tpy was adsorbed on the sidewall surface of MWCNTs through electrostatic interaction.

[0029] In the third step, after the reaction is over, tear off the tinfoil covering the round-bottom flask, quickly expose it to a 400W ultraviolet lamp, and irradiate it for 30 minutes while stirring. Through the photoreaction of the diazo group, the loss of nitrogen produces crosslinking. The terpyridine group is directly connected to the outer wall of MWCNTs in the form of a covalent bond (the modifica...

Embodiment 2

[0038] In the first step, in a 100ml round bottom flask, dissolve 10mg of pure multi-walled carbon nanotubes in 50ml of acetonitrile, and disperse them fully by ultrasonication for 30min. liquid.

[0039] In the second step, under stirring, add the suspension of MWCNTs sonicated in the first step into 50 ml of Diazo-tpy / acetonitrile solution with a concentration of 0.4 mg / ml using a dropper. The reaction was stirred for 48 hours at 0° C. and protected from light.

[0040] The third step, after the reaction is over, tear off the tinfoil covering the round-bottom flask, quickly expose it to a 400W ultraviolet lamp, and irradiate it for 30 minutes while stirring. Through the photoreaction of the diazo group, the loss of nitrogen produces crosslinking. The terpyridine group is directly connected to the outer wall of MWCNTs in the form of covalent bonds.

[0041] The fourth step, the post-processing is the same as the fourth step in Example 1.

[0042] The fifth step is the con...

Embodiment 3

[0047] In the first step, in a 100ml round bottom flask, dissolve 10mg of pure multi-walled carbon nanotubes in 50ml of acetonitrile, and disperse them fully by ultrasonication for 30min. liquid.

[0048] In the second step, under stirring, add the suspension of MWCNTs ultrasonically treated in the first step into 50 ml of Diazo-tpy / acetonitrile solution with a concentration of 0.2 mg / ml using a dropper. The reaction was stirred at 0°C and protected from light for 48 hours, so that Diazo-tpy was adsorbed on the sidewall surface of MWCNTs through electrostatic interaction.

[0049] The third step, after the reaction is over, tear off the tinfoil covering the round-bottom flask, quickly expose it to a 400W ultraviolet lamp, and irradiate it for 30 minutes while stirring. Through the photoreaction of the diazo group, the loss of nitrogen produces crosslinking. The terpyridine group is directly connected to the outer wall of MWCNTs in the form of covalent bonds.

[0050] In the...

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Abstract

The invention relates to layer-by-layer self-assembly on the surfaces of substrates in a coordinate bond mode after a fully-conjugated photosensitive terpyridine derivative, namely 4'-(4-diazo)phenyl-(2, 2': 6', 2')-terpyridine fluoroborate (Diazo-tpy for short) modifies covalent bonds of multi-wall carbon nano-tubes, which belongs to the chemical field of functional materials, nanometer materials, and supramolecular self-assembly. Firstly, the Diazo-tpy is used to modify the covalent bonds of the multi-wall carbon nano-tubes; and secondly, the modified multi-wall carbon nano-tubes perform the layer-by-layer self-assembly on the surfaces of various functional substrates in the form of coordinate bonds to realize the full-conjugated assembly of the carbon nano-tubes and the substrates, andmetal particles are introduced to realize the further functionalization of the functional substrates. The method has simple, convenient and easy process as well as uniform and full modification, doesnot need special conditions and equipment, and can effectively control the deposition amount of the nano-tubes on the surfaces of the substrates through the number of assembly layers to realize the effective quantitative control of the performance.

Description

technical field [0001] The present invention relates to a fully conjugated photosensitive terpyridine derivative 4'-(4-diazo)phenyl-(2,2':6',2")-terpyridine fluoroborate (abbreviated as Diazo- After tpy) covalently modify multi-walled carbon nanotubes, they self-assemble layer by layer on the surface of a substrate in the form of coordination bonds, belonging to the field of functional materials, nanomaterials, and supramolecular self-assembly chemistry. Background technique [0002] Due to the unique mechanical, electrical, magnetic, optical and thermal properties of carbon nanotubes (CNTs), since the first discovery by Iijina in 1991, it has aroused great research enthusiasm among scientific and technological workers. According to different chiralities, single-walled carbon nanotubes (SWNTs) can exhibit metallic, semi-metallic, and semiconducting electrical conductivity. The energy gap between its conduction and valence bands can vary from 0 Ev to about 1 Ev. Scientists ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B31/02
Inventor 董宇平潘月秀佟斌支俊格赵玮申进波陈明轩
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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