A kind of titanium dioxide grafted carbon quantum dot supported spiropyran photoinduced double color change material and its preparation method and application

A technology of color-changing materials and spiropyran, which is applied in the direction of luminescent materials, chemical instruments and methods, etc., can solve the problem of unobvious photochromic response of spiropyran, and achieve improved solid-state color-changing performance, increased free volume, and light response. sensitive effect

Active Publication Date: 2022-02-18
ZHEJIANG SCI-TECH UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a titanium dioxide grafted carbon quantum dot loaded spiropyran photochromic material and its preparation method and application, to solve the problems in the prior art above, by loading spiropyran on TiO 2 Composite particles prepared on CQDs can improve the shortcoming of spiropyran’s indistinct photochromic response in the solid state, improve the solid-state photochromic performance of spiropyran, and at the same time, the introduction of fluorescent carbon quantum dots enables the composite particles to achieve double color change

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  • A kind of titanium dioxide grafted carbon quantum dot supported spiropyran photoinduced double color change material and its preparation method and application
  • A kind of titanium dioxide grafted carbon quantum dot supported spiropyran photoinduced double color change material and its preparation method and application
  • A kind of titanium dioxide grafted carbon quantum dot supported spiropyran photoinduced double color change material and its preparation method and application

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Embodiment 1

[0034] Step 1: Add 1.0g of maleic anhydride, 1.0g of urea and 13.0mL of absolute ethanol to a 20mL polytetrafluoroethylene reactor, and place the reactor in a high-temperature furnace at 200°C for hydrothermal reaction for 4 hours to obtain fluorescent Carbon quantum dots (CQDs), after cooling, add 50mL deionized water to dilute, centrifuge and wash at 10000rpm, add 500mL absolute ethanol to make carbon quantum dot ethanol dispersion system;

[0035] Add 10mL of triethanolamine, 30mL of n-butanol and 30mL of deionized water to the reaction vessel and stir well at room temperature, then quickly add 16.3mL of n-butyl titanate and 4.1mL of 3-aminopropyltriethoxysilane n-butyl Alcohol solution (70mL), condensed and refluxed at 60°C and stirred for reaction, centrifuged after the reaction, washed 3 times with absolute ethanol and water to prepare aminated titanium dioxide;

[0036] Aminated titanium dioxide, 1-hydroxybenzotriazole monohydrate, N,N'-dicyclohexylcarbodiimide and carb...

Embodiment 2

[0040] Step 1: Add 1.0g of maleic anhydride, 1.0g of urea and 13.0mL of absolute ethanol to a 20mL polytetrafluoroethylene reactor, and place the reactor in a high-temperature furnace at 200°C for hydrothermal reaction for 4 hours to obtain fluorescent Carbon quantum dots (CQDs), after cooling, add 50mL deionized water to dilute, centrifuge and wash at 10000rpm, add 500mL absolute ethanol to make carbon quantum dot ethanol dispersion system;

[0041] Add 10mL of triethanolamine, 30mL of n-butanol and 30mL of deionized water to the reaction vessel and stir well at room temperature, then quickly add 16.3mL of n-butyl titanate and 4.1mL of 3-aminopropyltriethoxysilane n-butyl Alcohol solution (70mL), condensed and refluxed at 60°C and stirred for reaction, centrifuged after the reaction, washed 3 times with absolute ethanol and water to prepare aminated titanium dioxide;

[0042] Aminated titanium dioxide, 1-hydroxybenzotriazole monohydrate, N,N'-dicyclohexylcarbodiimide and carb...

Embodiment 3

[0046] Step 1: Add 1.0g of maleic anhydride, 1.0g of urea and 13.0mL of absolute ethanol to a 20mL polytetrafluoroethylene reactor, and place the reactor in a high-temperature furnace at 200°C for hydrothermal reaction for 4 hours to obtain fluorescent Carbon quantum dots (CQDs), after cooling, add 50mL deionized water to dilute, centrifuge and wash at 10000rpm, add 500mL absolute ethanol to make carbon quantum dot ethanol dispersion system;

[0047] Add 10mL of triethanolamine, 30mL of n-butanol and 30mL of deionized water to the reaction vessel and stir well at room temperature, then quickly add 16.3mL of n-butyl titanate and 4.1mL of 3-aminopropyltriethoxysilane n-butyl Alcohol solution (70mL), condensed and refluxed at 60°C and stirred for reaction, centrifuged after the reaction, washed 3 times with absolute ethanol and water to prepare aminated titanium dioxide;

[0048] Aminated titanium dioxide, 1-hydroxybenzotriazole monohydrate, N,N'-dicyclohexylcarbodiimide and carb...

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Abstract

The invention discloses a titanium dioxide-grafted carbon quantum dot-loaded spiropyran photochromic double material, a preparation method and application thereof, and belongs to the field of organic solid-state photochromic materials. The present invention loads spiropyran to titanium dioxide grafted fluorescent carbon quantum dots TiO 2 On ‑CQDs, through the pore size of the composite particles, the free volume of the molecular space of the spiropyran is increased, so that the spiropyran has enough space for ring-opening and ring-closing reactions in the solid state to improve the color-changing performance. In addition, the fluorescence emission wavelength range of carbon quantum dots overlaps greatly with the ring-opening absorption wavelength range of spiropyran, so that energy transfer can occur between carbon quantum dots and spiropyran, thereby improving the fluorescent color-changing performance of the material, and realizing the material's color change. Double color changing response has broad application prospects in the field of anti-counterfeiting.

Description

technical field [0001] The invention relates to the field of organic solid-state photochromic materials, in particular to a titanium dioxide-grafted carbon quantum dot-supported spiropyran photochromic double photochromic material and its preparation method and application. Background technique [0002] Photochromism means that after a compound is stimulated by light of a specific wavelength, the structure of the compound changes, resulting in a change in the absorption wavelength of the compound and the change is reversible. As a new type of smart material, photochromic materials can be applied in the fields of optical information storage, anti-counterfeiting materials, decoration and national defense, so photochromic materials have gradually become a research hotspot. At present, the photochromic materials that can be commercially applied in the solid state are mainly inorganic materials. Organic photochromic materials generally need to be used in solvents or blended with ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/02C09K11/65C09K11/06
CPCC09K11/025C09K11/65C09K11/06C09K2211/1033
Inventor 杨玉慧何钧照王朝辉赵慧敏何哲江国华
Owner ZHEJIANG SCI-TECH UNIV
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