A kind of three-dimensional spin cross gel material and preparation method and application

A technology of spin-crossing and gel materials, which is applied in the field of spin-crossing complex materials, achieves great application prospects, good energy performance, and simple and flexible preparation methods.

Active Publication Date: 2022-06-28
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It's just that most light-triggered switches are actuated with high-energy ultraviolet (UV) or visible (vis) light, which has the disadvantage of limited penetration and intrusion

Method used

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  • A kind of three-dimensional spin cross gel material and preparation method and application

Examples

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Effect test

Embodiment 1

[0023] Example 1: Preparation of three-dimensional spin-crossed gel material

[0024] (1) Preparation of PVDF / PEG sol I: 0.45g polyethylene glycol (PEG, Mw~6000) was put into a 50mL three-neck flask at room temperature (20°C), and 15mL N,N-diol was poured into the flask. Methylformamide (DMF), sonicated for 10 min at 45°C and 40 kHz until PEG was completely dissolved and turned transparent, then 2 g of polyvinylidene fluoride (PVDF, Mw ~ 50000) was added, and stirred at 300 rpm for 2 h until PVDF was completely dissolved. Transparent to obtain a colorless and transparent PVDF and PEG mixed sol PVDF / PEG sol I;

[0025] (2) 30 mg of the two-dimensional spin cross-complex [Fe(1,3-bpp) 2 (NCS) 2 ] 2 (For the preparation method, see Chinese Patent 2018108260382) and 6 mg of upconverting nanoparticles UCNPs (β-NaYF 4 :ErYb) was added to the PVDF / PEG sol I obtained in step (1), stirred for 1.5 h, then transferred the flask to a 90 °C oil bath and continued stirring at 300 rpm for...

Embodiment 2

[0029] Example 2: Preparation of three-dimensional spin-crossed gel material

[0030] (1) Preparation of PVDF / PEG sol I: 0.2 g polyethylene glycol (PEG, Mw~6000) was put into a 100 mL three-neck flask at room temperature (15° C.), and 30 mL of N,N-diol was poured into the flask. Methylformamide (DMF) was sonicated at 30°C and 60kHz for 5min until PEG was completely dissolved and turned transparent, then 4g of polyvinylidene fluoride (PVDF, Mw~50000) was added, and stirred at 500rpm for 3h until PVDF was completely dissolved. Transparent to obtain a colorless and transparent PVDF and PEG mixed sol PVDF / PEG sol I;

[0031] (2) 15 mg of the two-dimensional spin cross-complex [Fe(1,3-bpp) 2 (NCS) 2 ] 2 (For the preparation method, see Chinese Patent 2018108260382) and 3 mg of upconverting nanoparticles UCNPs (β-NaYF 4 : TmYb) was added to the PVDF / PEG sol I obtained in step (1), stirred for 0.5 h, and then transferred the flask to a 90 °C oil bath and continued to stir at 100 ...

Embodiment 3

[0034] Example 3: Preparation of three-dimensional spin-crossed gel material

[0035] (1) Preparation of PVDF / PEG sol I: 1 g polyethylene glycol (PEG, Mw~6000) was put into a 50 mL three-necked flask at room temperature (25° C.), and 10 mL of N,N-dimethylformaldehyde was poured into the flask. Dimethylformamide (DMF), ultrasonicated for 20min at 60℃, 20kHz until PEG was completely dissolved and turned transparent, then 1 g of polyvinylidene fluoride (PVDF, Mw~50000) was added, and stirred at 100rpm for 1h until PVDF was completely dissolved and turned transparent , obtain the mixed sol PVDF / PEG sol I of colorless and transparent PVDF and PEG;

[0036] (2) 60 mg of the two-dimensional spin cross-complex [Fe(1,3-bpp) 2 (NCS) 2 ] 2 (For the preparation method, see Chinese Patent 2018108260382) and 12 mg of upconverting nanoparticles UCNPs (β-NaYF 4 : HoYb) was added to the PVDF / PEG sol I obtained in step (1), stirred for 1.5 h, then transferred the flask to a 90 °C oil bath a...

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Abstract

The invention discloses a three-dimensional spin cross gel material, a preparation method and an application. The gel material of the present invention includes PVDF, PEG, two-dimensional spin cross-complexes and lanthanide-doped up-conversion nanoparticles, and the two-dimensional spin cross-complexes are [Fe(1,3-bpp) 2 (NCS) 2 ] 2 , the [Fe(1,3‑bpp) 2 (NCS) 2 ] 2 The mass percentage of PVDF is 0.375%-6%, the mass percentage of the up-conversion nanoparticles to PVDF is 0.075%-1.2%; the mass ratio of PEG to PVDF is 0.2-1:1-4. The three-dimensional spin crossing gel material realizes the molecular spin crossing behavior triggered by near-infrared light at normal temperature and pressure, and is simple to prepare and stable in performance. It has great applications in molecular electronic devices such as information storage, molecular switches, and molecular displays. prospect.

Description

technical field [0001] The invention relates to a spin cross complex material, in particular to a three-dimensional spin cross gel material and a preparation method and application. Background technique [0002] Spin-crossover materials are one of the most attractive bistable materials, which have the ability to switch between two electronic states, that is, under specific external stimulus conditions (such as temperature, pressure, light radiation, guest molecules, etc.) Interconversion between high and low spin states of transition metal ions occurs. This conversion will be accompanied by a series of magnetic, electronic, optical, thermal and other performance changes, making them attractive application prospects in the fields of new information storage devices, molecular switches, display devices, and detection devices at the molecular level. [0003] Ultrathin two-dimensional nanomaterials endow them with unique physical, electronic, chemical and optical properties and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J3/09C08L27/16C08L71/02C08K5/00C08K3/16
CPCC08J3/096C08J2327/16C08J2471/02C08K5/0091C08K3/16
Inventor 罗洋辉王佳莹马淑华董慧张岚方文霞
Owner SOUTHEAST UNIV
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