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Ordered mesoporous organosilicon fluorescent nanometer material and preparation method thereof

A fluorescent nanomaterial and mesoporous organosilicon technology, which is applied in the fields of chemistry and material science, can solve the problems of unsuitable application, limited application of fluorescent mesoporous nanoparticles, occupying space of pores, etc., and achieves the effect of good fluorescence tunability.

Inactive Publication Date: 2016-03-23
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, many of these luminescent groups are toxic or have low quantum yields, which greatly limit the application of fluorescent mesoporous nanoparticles.
Usually, the luminescent group will be introduced as a core into the particles of the core-shell structure; or directly grafted into the mesoporous channel, which will inevitably occupy the space in the channel and even cause the channel to be blocked
For small-sized organic dyes, although it can be embedded into the framework of the mesoporous structure to form ordered mesoporous organosilicon (PMO) to overcome the above problems, but the PMO material obtained by this method has poor monodispersity and fluorescence modulation ability. Weak, most require high-energy wavelengths to be excited, so it is not suitable for applications in biological systems

Method used

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  • Ordered mesoporous organosilicon fluorescent nanometer material and preparation method thereof
  • Ordered mesoporous organosilicon fluorescent nanometer material and preparation method thereof
  • Ordered mesoporous organosilicon fluorescent nanometer material and preparation method thereof

Examples

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Embodiment 1

[0027] Measure 0.7ml of 2M sodium hydroxide aqueous solution, add 90ml of water to dilute, and stir evenly at 40°C; weigh 0.2g of dodecyltrimethylammonium bromide (CTAB), dissolve it in 10ml of water, and add it to the hydroxide In sodium aqueous solution, stir evenly; heat up to 70°C, after 10 minutes, add 1.0ml tetraethyl orthosilicate, 100ul carbon quantum dots (CD), after stirring for 2 minutes, add 1.0ml ethyl acetate, stir for 30 seconds, in Stand at 70°C for 2 hours; obtain a solid by centrifugation, wash with water and ethanol repeatedly, and dry. The surfactant is extracted and removed to obtain ordered mesoporous organic silicon fluorescent nanoparticles.

Embodiment 2

[0029] Measure 0.7ml of 2M sodium hydroxide aqueous solution, add 90ml of water to dilute, and stir evenly at 40°C; weigh 0.2g of dodecyltrimethylammonium bromide (CTAB), dissolve it in 10ml of water, and add it to the hydroxide In sodium aqueous solution, stir evenly; heat up to 70°C, after 10 minutes, add 1.0ml tetraethyl orthosilicate, 200ul carbon quantum dots (CD), after stirring for 2 minutes, add 1.0ml ethyl acetate, stir for 30 seconds, in Stand at 70°C for 2 hours; obtain a solid by centrifugation, wash with water and ethanol repeatedly, and dry. The surfactant is extracted and removed to obtain ordered mesoporous organic silicon fluorescent nanoparticles.

Embodiment 3

[0031] Measure 0.7ml of 2M sodium hydroxide aqueous solution, add 90ml of water to dilute, and stir evenly at 40°C; weigh 0.2g of dodecyltrimethylammonium bromide (CTAB), dissolve it in 10ml of water, and add it to the hydroxide In sodium aqueous solution, stir evenly; heat up to 70°C, after 10 minutes, add 1.0ml tetraethyl orthosilicate, 500ul carbon quantum dots (CD), after stirring for 2 minutes, add 1.0ml ethyl acetate, stir for 30 seconds, in Stand at 70°C for 2 hours; obtain a solid by centrifugation, wash with water and ethanol repeatedly, and dry. The surfactant is extracted and removed to obtain ordered mesoporous organic silicon fluorescent nanoparticles.

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Abstract

The present invention discloses a mesoporous silicon fluorescent nanometer material preparation method, which comprises that: (1) organic silane-modified carbon quantum dots are obtained by using a high temperature cracking method; and (2) with the hydrolysis condensation polymerization of tetraethyl orthosilicate and the modified carbon quantum dots under an alkaline condition, the ordered mesoporous organosilicon fluorescent nanometer material is obtained through a one-step method. Compared to the fluorescent nanometer material in the prior art, the fluorescent nanometer material of the present invention has the following characteristics that the carbon quantum dots are doped in the pore walls instead of the pore channels, the material has smooth and ordered mesoporous pore channels, can be subjected to two-photon excitation, has adjustable fluorescence emission, is monodispersed spherical or ellipsoidal particles, and has small particle size, and the silicon-based material has advantages of low toxicity, good biocompatibility and the like, such that the material of the present invention has wide application prospects in the fields of traceable drug delivery, multi-channel fluorescent biological imaging, and the like.

Description

technical field [0001] The invention relates to an ordered mesoporous organic silicon fluorescent nanometer material and a preparation method thereof, belonging to the fields of chemistry and material science. Background technique [0002] Fluorescent mesoporous nanoparticles that integrate mesoporous structural features and fluorescence properties have attracted extensive attention for their special applications in biological imaging, signal sensing, and drug delivery. [0003] At present, the fluorescent mesoporous nanoparticles that have been studied more are mainly organic dyes, up-converting fluoresceins and semiconductor quantum dots. However, many of these luminescent groups are toxic or have low quantum yields, which greatly limit the application of fluorescent mesoporous nanoparticles. Usually, the luminescent group will be introduced as a core into the particles of the core-shell structure; or directly grafted into the mesoporous channel, which will inevitably occ...

Claims

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Application Information

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IPC IPC(8): C09K11/65
Inventor 张金龙王灵芝刘勇弟雷菊英杨林刚严雪枫程晨
Owner EAST CHINA UNIV OF SCI & TECH
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