Spin crossover-upconversion nano composite material as well as preparation method and application thereof

A technology of nanocomposite materials and spin crossover, applied in the field of spin crossover-upconversion nanocomposite materials and their preparation, which can solve problems such as attenuation

Inactive Publication Date: 2018-09-21
SOUTHEAST UNIV
View PDF2 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the LIESST effect has obvious disadvantages: it is usually only realized below 50K, and the excited HS state decays rapidly to the LS state
However, the research on the assembly of up-conversion nanoluminescent materials and spin-crossing materials into multifunctional and synergistic composite materials and realizing photo-induced spin-crossing at the single-molecule level has not been reported.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Spin crossover-upconversion nano composite material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A spin-crossing-upconversion nanocomposite material, the composite material is composed of a spin-crossing complex and an up-conversion nano-luminescent material through a coordination bond, and the structural formula is UCNPs@SCO, wherein SCO is a spin-crossing complex , the spin cross complexes are mononuclear ferrous compounds containing active functional groups, and UCNPs are up-conversion nano-luminescent materials. The mononuclear ferrous compound containing carboxyl functional group is [Fe(H 2 Bpz 2 ) 2 (bipy-COOH)].

[0029] This example spin cross complex selects the mononuclear ferrous compound containing carboxyl functional group [Fe(H 2 Bpz 2 ) 2 (bipy-COOH)], up-conversion nano-luminescent materials select up-conversion nanoparticles β-NaYF 4 :ErYb is used as material to prepare spin crossover-upconversion nanocomposite.

[0030] The preparation method of the spin cross-up conversion nanocomposite is as follows:

[0031] Step 1. Synthetic Fe(H 2 Bp...

Embodiment 2

[0036] This example spin cross complex selects the mononuclear ferrous compound containing carboxyl functional group [Fe(H 2 Bpz 2 ) 2 (bipy-COOH)], up-conversion nano-luminescent materials select up-conversion nanoparticles β-NaYF 4 : TmYb is used as material to prepare spin cross-up conversion nanocomposite.

[0037] The preparation method of the spin cross-up conversion nanocomposite is as follows:

[0038] Step 1. Synthetic Fe(H 2 Bpz 2 ) 2 Alcoholic solution, 0.3 mmol of Fe(ClO 4 ) 2 ·6H 2 O and 0.5 mmol of ligand KH 2 Bpz 2 Dissolve in 50 mL of methanol solution in a nitrogen atmosphere, stir for 25 min, and remove the resulting white precipitate KClO 4 Remove by filtration, the filtrate obtained is Fe(H 2 Bpz 2 ) 2 methanol solution.

[0039] Step 2. Synthesis contains the mononuclear ferrous compound [Fe(H 2 Bpz 2 ) 2 (bipy-COOH)], 0.3 mmol 4,4'-dicarboxy-2,2'-bipyridine ligand and 1 mmol hexadecylamine were mixed and fully dissolved in 45 mL methanol...

Embodiment 3

[0043] This example spin cross complex selects the mononuclear ferrous compound containing carboxyl functional group [Fe(H 2 Bpz 2 ) 2 (bipy-COOH)], up-conversion nano-luminescent materials select up-conversion nanoparticles β-NaYF 4 : HoYb is used as material to prepare spin crossover-upconversion nanocomposite.

[0044] The preparation method of the spin cross-up conversion nanocomposite is as follows:

[0045] Step 1. Synthetic Fe(H 2 Bpz 2 ) 2 Alcoholic solution, 0.25 mmol of Fe(ClO 4 ) 2 ·6H 2 O and 0.5 mmol of ligand KH 2 Bpz 2 Dissolve in 12.5 mL of methanol solution in a nitrogen atmosphere, stir for 20 min, and remove the resulting white precipitate KClO 4 Remove by filtration, the filtrate obtained is Fe(H 2 Bpz 2 ) 2 methanol solution.

[0046] Step 2. Synthesis contains the mononuclear ferrous compound [Fe(H 2 Bpz 2 ) 2 (bipy-COOH)], 0.2 mmol 4,4'-dicarboxy-2,2'-bipyridine ligand and 0.4 mmol hexadecylamine were mixed and fully dissolved in 15 mL ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a spin crossover-upconversion nano composite material as well as a preparation method and application thereof, and belongs to the field of spin crossover complex materials. Thespin crossover-upconversion nano composite material is formed by combining a spin crossover complex and an upconversion nano luminous material through a coordination bond, and a structural formula isUCNPs@SCO, wherein SCO is the spin crossover complex; the spin crossover complex is an active functional group-containing single-core ferrous compound; UCNPs is the upconversion nano luminous material for exploring regulation and control of a spin crossover behavior by near infrared excitation. The method is easy to operate and mild in condition and can realize low-energy photoinduced spin crossover behavior at a solid-state unimolecule level; the material is applied to molecular electronic appliances related to information storage, molecular switching and molecular displaying.

Description

technical field [0001] The invention belongs to the field of spin crossing complex materials, and more specifically relates to a spin crossing-up conversion nanocomposite material and its preparation method and application. Background technique [0002] The spin crossing phenomenon is an attractive research area in molecular-based magnetic materials. The heat, pressure or light-induced spin crossing phenomenon of spin crossing complexes may be accompanied by a series of other synergistic effects, such as changes in physical and chemical properties such as magnetic behavior, dielectric constant, compound color, and the presence of large thermal hysteresis effect etc. In contrast to other types of bistable materials, the electronic transitions within the corresponding transition metal central ions of spin-crossed materials are distinct from electron transfer between ions or bond transfer of bonded isomers without fatigue effects of any kind , and the spin crossover phenome...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): C07F15/02C07F19/00B82Y30/00B82Y40/00H01L51/54H01L51/50C09K11/06C09K11/85
CPCC09K11/06C09K11/7773B82Y30/00B82Y40/00C07F15/025C07F19/005C09K2211/182C09K2211/187H10K85/361H10K50/00
Inventor 罗洋辉王靖雯陈晨何晓彤洪丹丽孙伯旺
Owner SOUTHEAST UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap