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Method for grafting initiator on gold surface, gold surface polymer brush and preparation method thereof

A technology of surface grafting and initiator, applied in the field of materials, can solve the problems of unfavorable promotion and harsh preparation conditions, and achieve the effect of simple operation and mild reaction conditions

Active Publication Date: 2019-11-15
YANCHENG DAMING CHEM MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its preparation conditions are relatively harsh, which is not conducive to popularization

Method used

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Examples

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Effect test

preparation example Construction

[0036] The embodiment of the present invention also provides a preparation method of a gold surface polymer brush, which includes:

[0037] The second intermediate is prepared by adopting the above-mentioned method of grafting the initiator on the gold surface; and the second intermediate is mixed with the olefin polymer monomer to undergo free radical polymerization.

[0038] Preferably, the olefin polymer monomer includes at least one of acrylate compounds, acrylamide compounds, acrylonitrile compounds and vinylpyridine compounds.

[0039]The embodiment of the present invention also provides a polymer brush on a gold surface, which is prepared by the above method for preparing a polymer brush on a gold surface. The polymer brush on the gold surface has strong stability and controllable graft density, and has good application value.

Embodiment 1

[0042] This embodiment provides a kind of azidodiaziridine compound A, its chemical formula is Its preparation method is as follows:

[0043] 5-Bromo-2-adamantanone (1.16 g) was dissolved in 25% (w / v) ammonia in methanol and stirred at -10°C for 45 min. 1 g of hydroxylamine-O-sulfonic acid was dissolved in 10 ml of methanol solution and added dropwise to the above solution of 5-bromo-2-adamantanone. The reaction was continued for 18h under stirring at 4°C. The solvent was removed and the remaining solid was extracted twice with dichloromethane solvent (2 x 20ml). The dichloromethane solvents were combined and extracted three times (3×20 ml) with 2N sulfuric acid solution at 4°C, and the aqueous layer was collected and made basic with 2N sodium hydroxide solution at 4°C. It was extracted again with dichloromethane, and the organic layer was dried with potassium carbonate, filtered, and rotary evaporated to obtain a diaziridine intermediate (1.34 g, yield 82%).

[0044] The...

Embodiment 2

[0047] This embodiment provides a kind of azidodiaziridine compound B, its chemical formula is Its preparation method is as follows:

[0048] Dissolve 1-(3-bromophenyl)-2,2,2-trifluoroethan-1-one (1.35 g) in 25% (w / v) ammonia in methanol and stir at -10°C 60min. 1 g of hydroxylamine-O-sulfonic acid was dissolved in 10 ml of methanol solution and added dropwise to the above 1-(3-bromophenyl)-2,2,2-trifluoroethan-1-one solution. The reaction was continued for 18h under stirring at 4°C. The solvent was removed and the remaining solid was extracted twice with dichloromethane solvent (2 x 20ml). The dichloromethane solvents were combined and extracted three times (3×20 ml) with 2N sulfuric acid solution at 4°C, and the aqueous layer was collected and made basic with 2N sodium hydroxide solution at 4°C. It was extracted again with dichloromethane, and the organic layer was dried with potassium carbonate, filtered, and rotary evaporated to obtain a diaziridine intermediate (0.79...

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Abstract

The invention provides a gold surface initiator grafting method, a gold surface polymer brush and a preparation method thereof, and relates to the field of materials. The initiator grafting method ischaracterized in that adamantane carbene is used for building a stable self assembly single layer on the gold surface; the self assembly single layer is used for linking ATRP initiator active groups;lone pair electrons of the adamantane carbene C have high nucleophilicity and p rail bonding capability; strong Au-C bonds can be formed on the gold surface. Meanwhile, the adamantane carbene generation conditions are very simple; through illumination, precursors of diacriprodine amantadine can be generated. The carbene preparation process is pure; the use of reagents such as organic strong alkalicatalysts capable of being adsorbed on the gold surface is avoided. After the initiator is grafted onto the gold surface, the gold surface polymer brush can be prepared through further reaction withthe olefins polymer monomers; the operation is simple; the reaction conditions are mild; the realization path is provided for building the surface grafting density controllable polymer brush.

Description

technical field [0001] The invention relates to the field of materials, in particular to a method for grafting an initiator on a gold surface, a gold surface polymer brush and a preparation method thereof. Background technique [0002] In recent years, the construction of polymer molecular brushes on the surface of substrates has become a research hotspot of advanced functional materials. Among them, the surface in situ induced atom transfer radical polymerization (SI-ATRP) to construct polymer brushes shows great application potential; and gold is the most ideal SI-ATRP matrix material, mainly because of its high surface chemical uniformity and easy cleaning. , strong anti-fouling ability and good compatibility with most thin film analysis techniques (such as surface plasmon resonance SPR). [0003] To realize in-situ SI-ATRP on the gold surface, the key is to graft (anchor) the ATRP initiator on the gold surface, so that the active functional group (halogen group) of the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07F1/12C08F292/00C08F220/14C08F220/44
CPCC07F1/00C08F292/00C08F220/14C08F220/44
Inventor 仓辉唐永明张怀红唐喆石文艳陈松汪艺宁
Owner YANCHENG DAMING CHEM MACHINERY
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