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A preparation method of polymer planar optical waveguide with pH value fluorescence response

A planar optical waveguide, fluorescence response technology, applied in optical waveguide light guides, chemical instruments and methods, luminescent materials, etc. Effect

Active Publication Date: 2019-12-13
HUIZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Although organic fluorescent molecules have been widely used in planar optical waveguide fluorescence sensors, organic fluorescent molecules have a disadvantage that they are prone to "photobleaching", which limits their application range.
Especially when the concentration of organic fluorescent molecules is low, a greater excitation intensity is required to generate a measurable optical signal, and strong excitation light often leads to the degradation of organic molecules, thereby changing their luminescent spectral properties, and even loss of sensing

Method used

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  • A preparation method of polymer planar optical waveguide with pH value fluorescence response
  • A preparation method of polymer planar optical waveguide with pH value fluorescence response
  • A preparation method of polymer planar optical waveguide with pH value fluorescence response

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Embodiment 1

[0025] Embodiment 1. A method for preparing a polymer planar optical waveguide with pH value fluorescence response, the specific steps are:

[0026] 1. Put 1 g of carbon nanotubes into concentrated H 2 SO 4 and HNO 3 The mixed solution (volume ratio: 3:1) was treated with ultrasonic vibration and mechanical stirring for 2 hours, then washed with a large amount of deionized water until neutral, and vacuum-dried at 50°C for 7 hours.

[0027] 2. The carbon nanotubes obtained in step 1 were added to 30 g of thionyl chloride, heated to 60° C. under ultrasonic vibration, and refluxed for 24 hours, and then the excess acyl chloride reagent was distilled off under reduced pressure.

[0028] 3. Add the carbon nanotubes obtained in step 2 into 60g of 15wt% 5-amino-1,10-phenanthroline-dimethylformamide solution, stir and react with magnetic force at 80°C for 16h, filter, wash with absolute ethanol, and set at 60°C Dry in vacuum for 5h.

[0029] 4. The carbon nanotube that step 3 ...

Embodiment 2

[0032] Embodiment 2, a preparation method of a polymer planar optical waveguide with pH value fluorescence response, the specific steps are:

[0033] 1. Put 2 g of carbon nanotubes into concentrated H 2 SO 4 and HNO 3 The mixed solution (volume ratio: 3:1) was treated with ultrasonic vibration and mechanical stirring for 4 hours, then washed with a large amount of deionized water until neutral, and vacuum-dried at 60°C for 10 hours.

[0034] 2. The carbon nanotubes obtained in step 1 were added to 45 g of oxalyl chloride, heated to 60° C. under ultrasonic vibration, and refluxed for 24 hours, and then the excess acyl chloride reagent was removed by distillation under reduced pressure.

[0035] 3. Add the carbon nanotubes obtained in step 2 into 100g of 15wt% 5-amino-1,10-phenanthroline-dimethylformamide solution, stir and react with magnetic force at 80°C for 16h, filter, wash with absolute ethanol, and set at 60°C Dry in vacuum for 5h.

[0036] 4. The carbon nanotube ...

Embodiment 3

[0039] Embodiment 3, a preparation method of a polymer planar optical waveguide with pH value fluorescence response, the specific steps are:

[0040] 1. Put 1.8 g of carbon nanotubes into concentrated H 2 SO 4 and HNO 3 The mixed solution (volume ratio: 3:1) was treated with ultrasonic vibration and mechanical stirring for 5 hours, then washed with a large amount of deionized water until neutral, and vacuum-dried at 55°C for 7 hours.

[0041] 2. The carbon nanotubes obtained in step 1 were added to 85 g of thionyl chloride, heated to 60° C. under ultrasonic vibration, and refluxed for 24 hours, and then the excess acyl chloride reagent was distilled off under reduced pressure.

[0042] 3. Add the carbon nanotubes obtained in step 2 into 105g of 15wt% 5-amino-1,10-phenanthroline-dimethylformamide solution, stir and react with magnetic force at 80°C for 16h, filter, wash with absolute ethanol, and set at 60°C Dry in vacuum for 5h.

[0043] 4. The carbon nanotube that ste...

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Abstract

The invention belongs to the technical field of optical waveguide devices, and particularly relates to a polymer planar optical waveguide having pH value fluorescence response and a preparation methodthereof. A carbon nanotube is modified by the luminescent rare earth europium compound Eu(DBM)3(H2O)2 and the carbon nanotube is dispersed in polyimides so as to prepare the polymer planar optical waveguide having pH value fluorescence response. The carbon nanotube modified by the luminescent rare earth compound is combined with the polyimides so that the novel pH value fluorescence response planar optical waveguide simultaneously having the rare earth ion luminescence characteristic and the carbon nanotube excellent performance can be acquired, and the method is easy to operate and the prepared material has stable performance.

Description

technical field [0001] The invention belongs to the technical field of optical waveguide devices, and in particular relates to a preparation method of a polymer planar optical waveguide with pH value fluorescence response. Background technique [0002] The planar optical waveguide fluorescence sensor mainly utilizes that when the fluorescent sensitive material is in contact with the measured substance or the environment, the inherent photophysical characteristics of the fluorescent group are affected, so that the output form of the optical signal is changed to achieve the sensing purpose. According to the different types of fluorophores, fluorescent sensitive materials are usually divided into two categories: sensitive materials based on organic molecular fluorescence and sensitive materials based on rare earth ion luminescence. Organic molecular fluorescent materials are widely used in the study of planar optical waveguide sensing due to their large absorption and emission ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B6/13C09K11/06C09K11/02
Inventor 解芳封科军刁贵强梁浩
Owner HUIZHOU UNIV