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Three-dimensional spin-crossover gel material as well as preparation method and application thereof

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

Active Publication Date: 2021-09-07
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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  • Three-dimensional spin-crossover gel material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

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

[0025] (2) 30 mg of two-dimensional spin cross complex [Fe(1,3-bpp) 2 (NCS) 2 ] 2 (Refer to Chinese patent 2018108260382 for the preparation method) and 6 mg up-conversion nanoparticles UCNPs (β-NaYF 4 :ErYb) was added to the PVDF / PEG sol I obtained in step (1), stirred for 1.5h, then transferred the flask to a 90°C oil bath and continued to stir for 8h at 300rpm until the two-dimensi...

Embodiment 2

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

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

[0031] (2) 15 mg of two-dimensional spin cross complex [Fe(1,3-bpp) 2 (NCS) 2 ] 2 (Refer to Chinese patent 2018108260382 for the preparation method) and 3mg up-conversion nanoparticles UCNPs (β-NaYF 4 : TmYb) was added to the PVDF / PEG sol I obtained in step (1), stirred for 0.5h, then transferred the flask to a 90°C oil bath and continued to stir for 6h at 100rpm until the two-dimensio...

Embodiment 3

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

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

[0036] (2) Mix 60 mg of the two-dimensional spin cross complex [Fe(1,3-bpp) under stirring condition of 500 rpm 2 (NCS) 2 ] 2 (Refer to Chinese patent 2018108260382 for the preparation method) and 12mg up-converting nanoparticles UCNPs (β-NaYF 4 :HoYb) was added to the PVDF / PEG sol I obtained in step (1), stirred for 1.5h, then transferred the f...

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Abstract

The invention discloses a three-dimensional spin-crossover gel material as well as a preparation method and application thereof. The gel material comprises PVDF, PEG, a two-dimensional spin crossover complex and lanthanide doped up-conversion nanoparticles, the two-dimensional spin crossover complex is [Fe(1, 3-bpp) 2 (NCS) 2]2, the mass percent of [Fe (1, 3-bpp) 2 (NCS)2] 2 to PVDF is 0.375%-6%, and the mass percent of up-conversion nanoparticles to PVDF is 0.075%-1.2%; and the mass ratio of the PEG to the PVDF is (0.2-1): (1-4). The three-dimensional spin-crossover gel material realizes a molecular spin-crossover behavior triggered by near-infrared light at normal temperature and normal pressure, is simple to prepare and stable in performance, and has a huge application prospect in the aspects of molecular electronic devices such as information storage, molecular switches and molecular display.

Description

technical field [0001] The invention relates to a spin-cross complex material, in particular to a three-dimensional spin-cross gel material and its 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 an...

Claims

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Application Information

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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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