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Rubber with fluorescence response to pH value and preparation method thereof

A fluorescent response and rubber technology, applied in the direction of fluorescence/phosphorescence, material excitation analysis, etc., can solve the problems of physical, chemical and mechanical performance limitations, and achieve the effect of wide applicability

Inactive Publication Date: 2011-09-07
FUJIAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the limitations of the physical, chemical and mechanical properties of these carriers, their use has been limited.

Method used

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  • Rubber with fluorescence response to pH value and preparation method thereof
  • Rubber with fluorescence response to pH value and preparation method thereof
  • Rubber with fluorescence response to pH value and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] 1. Preparation of Rhodamine Ester

[0033] Measure 125mL of acetyl chloride and slowly add it dropwise to 500mL of absolute ethanol solvent containing 10g of rhodamine B. 2 Under protection, the reaction was incubated at 50° C. for 2 hours. Ethanol was distilled off under reduced pressure to obtain a crude product. The crude product was dissolved in 1000 mL of water, washed with ethyl acetate (3×500 mL), and the water was evaporated under reduced pressure to obtain 10.6 g of rhodamine B ethyl ester with a yield of 90%.

[0034] 2. Preparation of ethylenediamine substituted rhodamine

[0035] Dissolve 10 g of rhodamine B ethyl ester in 200 mL of 30°C methanol, and add 30 mL of ethylenediamine. The reaction mixture was heated to reflux for 1 hour, cooled to room temperature, and the methanol solvent was removed under reduced pressure. Add 1000mLCCl 4 , 2000mL of water, collected the organic layer, washed with water twice. The organic phase was dried with anhydrous s...

Embodiment 2

[0039] 1. Preparation of Rhodamine Ester

[0040] Measure 145mL of acetyl chloride and slowly add it dropwise to 500mL of anhydrous butanol solvent containing 13g of rhodamine B. 2 Under protection, the reaction was incubated at 35° C. for 3 hours. Butanol was distilled off under reduced pressure to obtain the crude product. The crude product was dissolved in 1000 mL of water, washed with ethyl acetate (3×500 mL), and the water was evaporated under reduced pressure to obtain 12.6 g of rhodamine B butyl ester with a yield of 86.3%.

[0041] 2. Preparation of ethylenediamine substituted rhodamine

[0042]Dissolve 12g of rhodamine B butyl ester in 230mL of 45°C methanol, and add 35mL of ethylenediamine. The reaction mixture was heated to reflux for 2 hours, cooled to room temperature, and the methanol solvent was removed under reduced pressure. Add 1000 mL of ethyl acetate and 2000 mL of water, collect the organic layer and wash with water twice. The organic phase was dried ...

Embodiment 3

[0046] 1. Preparation of Rhodamine Ester

[0047] Measure 140mL of acetyl chloride and slowly add it dropwise to 500mL of anhydrous pentanol solvent containing 12g of Rhodamine B, 2 Under protection, the reaction was incubated at 45° C. for 2.5 hours. The amyl alcohol was distilled off under reduced pressure to obtain a crude product. The crude product was dissolved in 1000 mL of water, washed with ethyl acetate (3×500 mL), and the water was distilled off under reduced pressure to obtain 12.6 g of rhodamine B amyl ester with a yield of 91.3%.

[0048] 2. Preparation of ethylenediamine substituted rhodamine

[0049] Dissolve 11 g of rhodamine B amyl ester in 200 mL of methanol at 45° C., and add 33 mL of ethylenediamine. The reaction mixture was heated to reflux for 1.5 hours, cooled to room temperature, and the methanol solvent was removed under reduced pressure. Add 1000mL cyclohexanone and 2000mL water, collect the organic layer and wash with water twice. The organic ph...

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Abstract

The invention relates to rubber with fluorescence response to a pH value and a preparation method thereof. The method comprises the following steps of: measuring acetyl chloride, adding into rhodamine B-containing alcohol solution dropwise, preserving heat for reaction, evaporating to remove the alcohol solution under reduced pressure, and washing by using ethyl acetate to obtain rhodamine B ester; dissolving the rhodamine B ester in hot methanol, adding ethylenediamine, performing refluxing reaction, cooling to room temperature, removing the methanol, adding an organic solvent 1 and water, and washing and drying an organic layer to obtain ethylenediamine substituted rhodamine B; and weighing chlorosulfonated polyethylene rubber, swelling in an organic solvent 2, adding the ethylenediamine substituted rhodamine B, reacting, filtering off a solid, washing, and drying to obtain the rubber with the fluorescence response to the pH value. The rubber prepared by the method is functional rubber with the fluorescence response to the pH value, and can detect and analyze the pH value of a biological system, a chemical reaction system, industrial wastewater, a river, a lake or an ocean.

Description

technical field [0001] The invention relates to a rubber with fluorescent response to pH value and its preparation method, in particular to chlorosulfonated polyethylene rubber with side chains grafted with fluorescent molecules of Rhodamine, which is used in biological systems, chemical reaction systems, industrial waste water, pH detection and analysis of rivers, lakes or oceans. Background technique [0002] The pollution of natural water bodies, the conduct or completion of chemical reactions, and many important physiological processes of cells and organelles are closely related to pH. Currently, many methods can be used to detect pH. These methods include electrochemical, NMR, absorption spectroscopy and fluorescence spectroscopy methods. The most common method of measuring pH is with a glass electrode. However, due to electrochemical interference, possible mechanical damage and other defects, it is not suitable for pH detection of some chemical reactions, heavily pol...

Claims

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Application Information

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IPC IPC(8): C08F10/02C08F8/32C08F8/38G01N21/64
Inventor 高勇陈庆华钱庆荣陈荣国杨松伟黄婷卓倩
Owner FUJIAN NORMAL UNIV
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