Conjugated polyelectrolyte with ratiometric fluorescence signals, preparation method and application thereof

A conjugated polyelectrolyte, ratiometric fluorescence technology, applied in fluorescence/phosphorescence, chemical instruments and methods, luminescent materials, etc., can solve problems affecting stability and efficiency of fluorescence resonance energy transfer, etc., to achieve strong anti-interference ability, selectable Good performance and high sensitivity

Inactive Publication Date: 2012-09-12
HUNAN NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, to achieve FRET, the donor and the acceptor not only need to meet certain requirements such as distance, direction, and spectral overlap, but also the interaction between the donor and the acceptor will be disturbed by external conditions and microenvironment, which will affect its stability and fluorescence. Efficiency of resonance energy transfer

Method used

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  • Conjugated polyelectrolyte with ratiometric fluorescence signals, preparation method and application thereof
  • Conjugated polyelectrolyte with ratiometric fluorescence signals, preparation method and application thereof
  • Conjugated polyelectrolyte with ratiometric fluorescence signals, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Example 1: Cationic pyrene-terminated polyfluorene phenylene vinylene ratio fluorescent conjugated polyelectrolyte and its preparation method and application

[0037] The cationic pyrene-terminated polyfluorene phenylene vinylene ratio fluorescent conjugated polyelectrolyte of this embodiment has the following structural formula:

[0038] , n=36.

[0039] Its preparation method comprises the following steps:

[0040] (1) Preparation and treatment of mixed solvent: Prepare mixed solvent according to the ratio of volume of water: volume of N, N-dimethylformamide: volume of diisopropylamine = 2:3:1, and then pass through the mixed solvent Nitrogen for 10 minutes to remove oxygen in the mixed solvent;

[0041] (2) In a 100mL three-necked flask, first add 0.15 mmol of 2,7-diiodo-9,9-bis(6'-(N,N,N,-trimethylammonium)-hexyl)fluorene and 0.15 mmol of 1,4-diethynylbenzene, then add 0.012 mmol tetrakistriphenylphosphorous palladium and cuprous iodide composite catalyst, unde...

Embodiment 2

[0050] Example 2: Anionic pyrene-terminated polyphenylene acetylene ratio fluorescent conjugated polyelectrolyte and its preparation method and application

[0051] The anionic pyrene-terminated polyphenylene acetylene ratio fluorescent conjugated polyelectrolyte of this embodiment has the following structural formula:

[0052] , n=105.

[0053] Its preparation method comprises the following steps:

[0054] (1) Preparation and treatment of mixed solvent: Prepare mixed solvent according to the ratio of volume of water: volume of dimethylformamide: volume of diisopropylamine = 2:3:1, and then pass nitrogen gas into the mixed solvent for 10 minutes, To remove the oxygen in the mixed solvent;

[0055] (2) In a 100mL three-necked flask, first add 0.15 mmol of 1,4-diiodo-2,5-dipropoxysodiumsulfonate-benzene and 0.15 mmol of 1,4-diethynylbenzene, then add 0.012 mmol tetrakistriphenylphosphopalladium and cuprous iodide composite catalyst; under nitrogen atmosphere, add 25mL mixed...

Embodiment 3

[0065] Example 3 Anionic pyrene-terminated polyphenylene acetylene-pyridine ratio fluorescent conjugated polyelectrolyte and its preparation method and application

[0066] The anionic pyrene-terminated polyphenylene acetylene-pyridine ratio fluorescent conjugated polyelectrolyte of this embodiment has the following structural formula:

[0067] , n=102.

[0068] Its preparation method comprises the following steps:

[0069] (1) Preparation and treatment of mixed solvent: Prepare mixed solvent according to the ratio of volume of water: volume of dimethylformamide: volume of diisopropylamine = 2:3:1, and then pass nitrogen gas into the mixed solvent for 10 minutes, To remove the oxygen in the mixed solvent;

[0070] (2) In a 100mL three-necked flask, first add 0.15 mmol of 1,4-diiodo-2,5-dipropoxysodiumsulfonate-benzene, 0.15 mmol of 2,6-diethynylpyridine, and then add 0.012 Mmol tetrakistriphenylphosphopalladium and cuprous iodide composite catalyst, under nitrogen atmosph...

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Abstract

Disclosed are a conjugated polyelectrolyte with ratiometric fluorescence signals, a preparation method and an application thereof. The conjugated polyelectrolyte contains more than two chromophores which satisfy fluorescence resonance energy transfer donor and acceptor relationship. The chromophores are associated with each other through Pi-electronic conjugation. The invention also comprises the preparation method of the conjugated polyelectrolyte with ratiometric fluorescence signals and an application thereof. The conjugated polyelectrolyte with ratiometric fluorescence signals has advantages of ratiometric fluorescence signals and conjugated polyelectrolyte, and has strong anti-interference capability, high sensitivity, good selectivity and wide application range.

Description

technical field [0001] The invention belongs to the technical fields of analytical chemistry, macromolecule synthesis and chemical biosensing, and in particular relates to a conjugated polyelectrolyte with ratio fluorescence signal and its preparation method and application. Background technique [0002] Conjugated polymers are also called "delocalized electronic polymers", and their main structural feature is the existence of long-range π-electron conjugated systems. The special structure of the conjugated polymer makes it have many specific photoelectric properties. [0003] Compared with traditional fat-soluble conjugated polymers, conjugated polyelectrolytes combine the advantages of traditional conjugated polymers’ optoelectronic properties (such as large molar absorptivity, high fluorescence quantum yield, and fluorescence signal amplification effect, etc.) Combined with the characteristics of the positive and negative charges, it has the characteristics of simple det...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G61/02C08G61/12G01N21/64C09K11/06
Inventor 黄红梅肖毅何晓晓张友玉李莎
Owner HUNAN NORMAL UNIVERSITY
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