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Dual-response magnetic nano particle with fluorescence and preparation method thereof

A magnetic nanoparticle, dual response technology, applied in the direction of chemical instruments and methods, luminescent materials, etc., can solve the problems of narrow responsiveness range, untraceable labeling, etc., and achieve narrow molecular weight distribution, low critical solution temperature reduction, controllable good sex effect

Inactive Publication Date: 2013-09-11
CHANGCHUN UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The above temperature-sensitive magnetic nanoparticles have shown good application value in drug sustained release, magnetic separation or protein immobilization, etc., but their responsiveness range is relatively narrow, and they cannot respond to more external stimuli, and they cannot show tracking marker

Method used

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  • Dual-response magnetic nano particle with fluorescence and preparation method thereof
  • Dual-response magnetic nano particle with fluorescence and preparation method thereof
  • Dual-response magnetic nano particle with fluorescence and preparation method thereof

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Embodiment Construction

[0018] The fluorescent dual-response magnetic nanoparticle of the present invention is a regular spherical nanoparticle with a particle size of 30-50 nm, and its chemical expression is: Fe 3 o 4 M(III)-(PNIPAM m -b-PAzoMA n )-TTA, where M is Eu 3+ , Tb 3+ 、Sm 3+ or Er 3+ ;PNIPAM m -b-PAzoMA n It is a block copolymer of poly(nitroisopropylacrylamide)-b-poly(6-(4ˊ-methoxy-4-oxyazobenzene)-hexyl methacrylate, m=41~132, n=5~ 20; TTA is α-thienoyl trifluoroacetone;

[0019] The method for preparing the fluorescent dual-response magnetic nanoparticles of the present invention will be described in detail.

[0020] First, RAFT chain transfer agent reacts with NIPAM to obtain PNIPAM macromolecular chain transfer agent. The specific process is as follows:

[0021] a, Preparation of RAFT chain transfer agent

[0022] Add mercaptan (RSH, where R is an alkyl group), acetone, and tetrabutylammonium bromide into the reaction flask, ventilate nitrogen in an ice bath, add a certain...

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Abstract

The invention discloses a dual-response magnetic nano particle with fluorescence and a preparation method thereof, belonging to the technical field of functional polymer materials. An existing response magnetic nano particle is smaller in response range and is incapable of tracing mark. A chemical expression formula of the magnetic nano particle is Fe3O4@M(III)-(PNIPAMm-b-PAzoMAn)-TTA (PNIPAM (Poly(N-isopropylacrylamide) and TTA (thenoyltrifluoroacetone), wherein M is Eu<3+>, Tb<3+>, Sm<3+> or Er<3+>, m is equal to 42-132, and n is equal to 5-20. AzoMA and NIPAM (N-isopropylacrylamide) are polymerized to an RAFT (Reversible Addition-Fragmentation chain Transfer) chain transfer agent through an RAFT free radical polymerization method, and M(III)-(PNIPAMm-b-PAzoMAn)-TTA is obtained through a coordination reaction, and then is modified to the surface of a ferriferrous oxide nano particle through an esterification reaction. The dual-response magnetic nano particle is capable of carrying out magnetic separation under the control of the temperature and the light, and has a potential application value in the aspects of biological marking, imaging, artificial muscle and the like.

Description

technical field [0001] The present invention relates to a fluorescent dual-response magnetic nanoparticle and a preparation method thereof, which utilizes fluorescent rare earth ions, the temperature sensitivity of azidopropylacrylamide and the photosensitivity of azobenzene compounds, and The excellent superparamagnetism of ferroferric oxide prepares multiple environment-responsive polymer materials, and belongs to the technical field of functional polymer materials. Background technique [0002] Environment-responsive polymer materials can sense a series of changes from the outside world such as temperature, pH, magnetism, light, and electric field. According to the nature of its characteristic changes in a specific environment, environment-responsive polymer materials can be applied to many fields, such as: artificial muscles, targeted drug release, memory element switches, sensors, chemical memories, biomarkers, molecular separation systems , tissue engineering, enzyme ...

Claims

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Application Information

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IPC IPC(8): C08G83/00C08F293/00C08F220/54C08F220/36C08F8/44C08F8/34C09K11/06
Inventor 段潜陈水颖李艳辉崔桂花常晶晶仇楠楠杨扬陈楠杨琳苗龙强
Owner CHANGCHUN UNIV OF SCI & TECH
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