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Preparation method of spin-crossover nanometer materials of mononuclear Fe (II) complexes

A nanomaterial and spin crossover technology, applied in the direction of iron-organic compounds, can solve the problems of different effect results, high production cost, complicated experimental device and operation of nanoimprint technology, etc., and achieve the effect of simple operation method and low cost.

Inactive Publication Date: 2013-06-12
XINJIANG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the microemulsion method has strong selectivity, and the results of different chemical reaction systems are very different; most of the existing studies on the preparation of spin crossing nanomaterials by the microemulsion method are empirical, and there is a lack of systematic research.
However, nanoimprint technology has the disadvantages of complicated experimental equipment and operation, high production cost, etc.

Method used

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  • Preparation method of spin-crossover nanometer materials of mononuclear Fe (II) complexes
  • Preparation method of spin-crossover nanometer materials of mononuclear Fe (II) complexes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Example 1 Fe(AP-MeSAL) 2 Preparation of spin crossed nanomaterials:

[0017] 0.2 mmol Fe(ClO 4 ) 2 ·6H 2 O and a small amount of ascorbic acid were dissolved in 10 mL of distilled water, 0.4 mmol of AP-MeSAL and an equimolar amount of NaOH were dissolved in 10 mL of anhydrous methanol, and 16 mmol of PVP was added to the above two solutions under stirring, and the stirring was continued to make it completely dissolved. Then the obtained metal salt solution was slowly added dropwise to the obtained ligand solution to produce a large amount of dark green precipitates, stirred and reacted at room temperature for 6 h, centrifuged (4200 rpm), washed with a large amount of water for 6-10 times, and naturally dried to obtain Fe (AP-MeSAL) 2 Spin crossover nanomaterials.

Embodiment 2

[0018] Example 2 Fe(AP-MeSAL) 2 Characterization of nanomaterials:

[0019] (1) Fe(AP-MeSAL) 2 TEM images of nanomaterials

[0020] Fe(AP-MeSAL) 2 The microstructure of nanomaterials was determined using a Hitachi H-600 transmission electron microscope. Depend on figure 1 It can be seen that Fe(AP-MeSAL) 2 A regular spherical shape.

[0021] (2) Fe(AP-MeSAL) 2 Magnetic Susceptibility Curves of Nanomaterials

[0022] Fe(AP-MeSAL) 2 The variable temperature magnetic susceptibility of nanomaterials adopts the American Quantum Design MPMC SQUID-XL5 magnetic measurement system. Depend on figure 2 It is known that the spin transition temperature of the substance is T 1 / 2 ↑=288 K and T 1 / 2 ↓=281 K, accompanied by a thermal hysteresis loop of about 7 K.

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Abstract

The invention relates to the preparation of novel spin-crossover nanometer materials, and in particular relates to a preparation method of spin-crossover nanometer materials of mononuclear Fe (II) complexes. According to the method, the nanometer mononuclear spin-crossover materials are prepared through introducing surfactant i.e. polyvinylpyrrolidone (PVP). The method is simple to operate, low in cost and has the advantages that the prepared Fe (AP-MeSAL) 2 nanometer materials still have the near room-temperature spin-crossover properties and are accompanied by 7K of thermal hysteresis loops.

Description

technical field [0001] The invention relates to the field of spin crossing material science, in particular to a preparation method of a mononuclear Fe(II) complex spin crossing nanometer material. Background technique [0002] In recent years, with the rapid development of molecular-based functional materials, the study of molecular materials has become the most attractive frontier topic, especially the study of electronic device materials at the molecular level has attracted more and more attention. Molecular bistability is closely related to new information storage, optical switches, thermal switches and other molecular electronic device materials at the molecular level, so it has become one of the research hotspots in chemistry, physics and materials science. In particular, spin-crossover materials with molecular bistability under certain external disturbances have broad application prospects in information storage, molecular switches, device displays, sensors, etc. In o...

Claims

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Application Information

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IPC IPC(8): C07F15/02
Inventor 贾殿赠王娟娟张丽
Owner XINJIANG UNIVERSITY
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