Near-infrared light activated fluorescence enhanced composite two-dimensional nano material as well as preparation and application thereof

A two-dimensional nanomaterial and two-dimensional material technology, applied in the direction of luminescent materials, material analysis through optical means, nanotechnology, etc., can solve the problems that hinder the application of up-conversion luminescent materials, low fluorescence intensity, and low relative conversion efficiency. Achieve the effects of improving up-conversion fluorescence efficiency, enhancing fluorescence intensity, and low price

Active Publication Date: 2020-05-01
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the low relative conversion efficiency and low fluorescence intensity of this material hinder the further application of upconversion luminescent materials.

Method used

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  • Near-infrared light activated fluorescence enhanced composite two-dimensional nano material as well as preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The invention provides a preparation method of a near-infrared-triggered fluorescence-enhanced composite two-dimensional material. The up-conversion nano-luminescent material is selected as β-NaYF 4 :TmYb, the method includes the following steps:

[0028] 1) At room temperature, 0.4 mmol of Zn(NO 3 ) 2 ·6H 2 O and 0.1mmol of 2,2'-bipyridine-5,5'-dicarboxylate were mixed, then 10ml of water was added to form a solution or suspension, and then hydrothermally reacted in a hydrothermal reactor at 140°C for 48h, After the hydrothermal reaction is completed, the solid product is obtained by centrifugation, and the solid product is washed with hot water to obtain a two-dimensional nanomaterial [Zn(2,2'-bipyridine-5,5'-dicarboxylate) (H 2 O)·H 2 O];

[0029] 2) Disperse 15mg of two-dimensional nanomaterials in 60mL of ethanol solvent in a 100mL beaker, ultrasonicate for 60min at 25°C and 20kHz, then stir at 500rpm for 12h, then stand for 24h, and then centrifuge at 100rpm ...

Embodiment 2

[0035]The invention provides a preparation method of a near-infrared-triggered fluorescence-enhanced composite two-dimensional material. The up-conversion nano-luminescent material is selected as β-NaYF 4 :ErYb, the method includes the following steps:

[0036] 1) At room temperature, 0.45 mmol of Zn(NO 3 ) 2 ·6H 2 O and 0.15mmol of 2,2'-bipyridine-5,5'-dicarboxylate were mixed, and then 10ml of water was added to form a solution or suspension, and then hydrothermally reacted in a hydrothermal reactor at 150°C for 48h, After the hydrothermal reaction is completed, the solid product is obtained by centrifugation, and the solid product is washed with hot water to obtain a two-dimensional nanomaterial [Zn(2,2'-bipyridine-5,5'-dicarboxylate) (H 2 O)·H 2 O];

[0037] 2) Disperse 20 mg of two-dimensional nanomaterials in 100 mL of ethanol solvent in a 150 mL beaker, ultrasonicate for 90 min at 40° C. and 60 kHz, then stir at 500 rpm for 24 h, and then stand for 36 h, and then r...

Embodiment 3

[0042] The invention provides a preparation method of a near-infrared-triggered fluorescence-enhanced composite two-dimensional material. The up-conversion nano-luminescent material is selected as β-NaYF 4 :HoYb, the method includes the following steps:

[0043] 1) At room temperature, 0.42 mmol of Zn(NO 3 ) 2 ·6H 2 O and 0.12mmol of 2,2'-bipyridine-5,5'-dicarboxylate were mixed, then 10ml of water was added to form a solution or suspension, and then the hydrothermal reaction was carried out in a hydrothermal reactor at 143°C for 50h, After the hydrothermal reaction is completed, the solid product is obtained by centrifugation, and the solid product is washed with hot water to obtain a two-dimensional nanomaterial [Zn(2,2'-bipyridine-5,5'-dicarboxylate) (H 2 O)·H 2 O];

[0044] 2) Disperse 19mg of two-dimensional nanomaterials in 70mL of ethanol solvent in a 100mL beaker, ultrasonicate for 70min at 30°C and 40kHz, then stir at 300rpm for 17h, then stand for 28h, and then ...

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Abstract

The invention discloses a near-infrared light activated fluorescence enhanced composite two-dimensional nano material as well as preparation and application thereof, wherein the composite two-dimensional material is formed by combining an ultrathin two-dimensional nano material and an up-conversion nano luminescent material. The preparation method of the composite two-dimensional material comprises the following steps: 1) preparing the two-dimensional nano material; 2) dispersing the two-dimensional nano-material in ethanol to prepare an ultrathin two-dimensional nano-material suspension; and3) dispersing the up-conversion nano luminescent material in ethanol, adding the ultrathin two-dimensional nano material suspension, stirring the solution, carrying out standing treatment, and removing the precipitate to obtain a colloidal solution containing the near-infrared activated fluorescence-enhanced composite two-dimensional material. The composite two-dimensional material is simple in preparation method, low in price and high in stability, and has a good application prospect in the aspects of sensors, bioimaging technologies, fluorescent probes and tumor targeting markers.

Description

technical field [0001] The invention relates to a near-infrared light-triggered fluorescence-enhanced composite two-dimensional nanomaterial and its preparation and application, and belongs to the field of nanomaterials. Background technique [0002] Ultrathin 2D nanomaterials have unique physical, electronic, chemical and optical properties due to their atomic thickness and 2D layered structure, and have broad application prospects in the fields of devices, sensing, catalysis, medicine and energy. . Compared with traditional 2D nanomaterials, ultrathin 2D metal-organic framework materials have tunable structure and function, large specific surface area, highly ordered pores and fully exposed surface active sites, ultrathin 2D nanomaterials. In particular, degradable ultrathin two-dimensional nanomaterials can be used in nanomedicine systems for cancer treatment. [0003] Upconversion luminescent material is a luminescent material that emits visible light under infrared ex...

Claims

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Application Information

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IPC IPC(8): C09K11/02C09K11/85G01N21/64B82Y30/00B82Y40/00
CPCC09K11/025C09K11/7773G01N21/6428B82Y30/00B82Y40/00
Inventor 罗洋辉王聪张岚方文霞王佳莹孙柏旺
Owner SOUTHEAST UNIV
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