Method for adjusting fluorescence performance of conjugate polyelectrolyte

A technology of conjugated polyelectrolytes and fluorescent properties, applied in chemical instruments and methods, luminescent materials, etc., can solve problems such as inapplicable biomolecular detection, improve fluorescence intensity and quantum efficiency, eliminate potential hazards, and sense and detect capabilities enhanced effect

Inactive Publication Date: 2013-08-14
SUZHOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the participation of organic solvents, thi

Method used

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  • Method for adjusting fluorescence performance of conjugate polyelectrolyte
  • Method for adjusting fluorescence performance of conjugate polyelectrolyte
  • Method for adjusting fluorescence performance of conjugate polyelectrolyte

Examples

Experimental program
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Embodiment 1

[0021] This embodiment provides a kind of conjugated polyelectrolyte (PPESO 3 OR) the adjustment method of fluorescent performance, concrete steps are as follows:

[0022] 1. According to the technical scheme of Chinese invention patent CN101892045A, the concentration is 1 × 10 -4 M (calculated as the molar concentration of repeating units) poly(arylene acetylene) conjugated polyelectrolyte PPESO 3 OR aqueous solution; the resulting conjugated polyelectrolyte PPESO 3 The OR aqueous solution was divided into 12 parts on average, one of which was taken as a blank control sample, and a small amount of α-cyclodextrin aqueous solution of different concentrations was added to the remaining parts to obtain a mixed solution, so that the concentration of cyclodextrin in each mixed solution changed from 0.1 Start with mM, increase sequentially with a gradient of 0.5 mM, and finally reach a cyclodextrin concentration of 7 mM;

[0023] 2. At room temperature, the above-mentioned mixed...

Embodiment 2

[0028] This embodiment provides a kind of conjugated polyelectrolyte (PPESO 3 OR) the adjustment method of fluorescent performance, concrete steps are as follows:

[0029] 1. According to the technical scheme of Chinese invention patent CN101892045A, the concentration is 1 × 10 -5 M (calculated as the molar concentration of repeating units) poly(arylene acetylene) conjugated polyelectrolyte PPESO 3 OR water solution, according to the method of Example 1, add a small amount of cyclodextrin β-CD aqueous solution, in each mixed solution, the concentration of cyclodextrin starts from 0.1mM, and increases sequentially with a gradient of 0.5 mM, and finally makes the cyclodextrin in the mixed solution The concentration of dextrin is 7 mM;

[0030] 2. At room temperature, vibrate each of the above mixed solutions for 15 min to make them fully interact. image 3 Similar to shown.

Embodiment 3

[0032] This embodiment provides a kind of conjugated polyelectrolyte (PPESO 3 OR) the adjustment method of fluorescent performance, concrete steps are as follows:

[0033] 1. According to the technical scheme of Chinese invention patent CN101892045A, the concentration is 1 × 10 -6 M (calculated as the molar concentration of repeating units) poly(arylene acetylene) conjugated polyelectrolyte PPESO 3 According to the method in Example 1, a small amount of cyclodextrin α-CD and β-CD aqueous solutions were added to the OR aqueous solution. In each mixed solution, the concentration of cyclodextrin started from 0.1 mM and increased sequentially with a gradient of 0.5 mM, and finally Make the concentration of cyclodextrin in the mixed solution be 7 mM;

[0034] 2. At room temperature, stir each of the above mixed solutions for 15 min to make them fully interact. image 3 Similar to shown.

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Abstract

The invention relates to a method for adjusting fluorescence performance of a conjugate polyelectrolyte. The method comprises the steps of: adding a cyclodextrin water solution in a 1 micromole-10 millimole polyelectrolyte water solution to enable the concentration of cyclodextrin in a mixed solution to achieve 0.1-20 millimole; and under the condition of room temperature, fully mixing the mixed solution, thereby enabling the fluorescence emission wavelength and emission intensity of the polyelectrolyte to change along with the changes of cyclodextrin concentration. According to the method, the fluorescence performance of the conjugate polyelectrolyte is adjusted based on the interaction of host-guest, and the lowering of sensing detection performance of a polymer caused by the formation of a positive-negative ion complex is avoided. Simultaneously, according to the method disclosed by the invention, the fluorescence performance of the polyelectrolyte is adjusted under a pure water state; and the method has the characteristics of simpleness, feasibility, environmental friendliness, and is applicable to preparation of biosensors and chemical sensors, and capable of detecting the sensing of substances such as metal ions.

Description

technical field [0001] The invention relates to the fields of fluorescent conjugated polymer sensing materials and supramolecular chemistry, in particular to a method for adjusting the fluorescence of conjugated polyelectrolytes. Background technique [0002] In recent years, conjugated polyelectrolytes (CPEs) have attracted extensive attention due to their unique photoelectric properties. Conjugated polyelectrolytes are usually composed of a rigid main chain and ionized side chains. Each atom in the main chain has delocalized π electrons. When excited, it is possible to release energy by radiation to fluoresce. . Due to the highly delocalized π electrons on the main chain of the conjugated polyelectrolyte, its energy or electrons can migrate within the entire polymer chain or the entire conjugated system, which has the characteristics of "molecular wires", thus obtaining the unique properties of small molecules. With high sensitivity. At the same time, the ionized side c...

Claims

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Application Information

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IPC IPC(8): C09K11/07
Inventor 范丽娟吴伟郭明雨
Owner SUZHOU UNIV
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