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Novel cobalt (III)-sulfur cluster-based coordination polymer with single-molecule magnet property

A technology of single-molecule magnets and coordination polymers, applied in the field of molecular magnetism, can solve problems such as lack of synthetic routes and difficulty in controlling magnetic coupling

Pending Publication Date: 2021-07-13
WENZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, compared with the widely reported multinuclear Mn(III) or Fe(III) clusters, polynuclear Co(II) clusters have been less explored, which may be attributed to the lack of an easy synthetic route that prevents Co( II) Ions are oxidized in air, and their magnetic coupling is difficult to control

Method used

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  • Novel cobalt (III)-sulfur cluster-based coordination polymer with single-molecule magnet property
  • Novel cobalt (III)-sulfur cluster-based coordination polymer with single-molecule magnet property
  • Novel cobalt (III)-sulfur cluster-based coordination polymer with single-molecule magnet property

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Experimental program
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Effect test

Embodiment 1

[0028] ① Pour sodium hydroxide (0.003 mol, 0.1200 g) into 10 ml of absolute ethanol, and then ultrasonically in an ultrasonic cleaner for a period of time until all sodium hydroxide is dissolved in absolute ethanol (wherein NaOH can be prepared by KOH, LiOH 、Na 2 CO 3 , NaHCO 3 and other alkaline substances instead);

[0029] ②Add o-mercaptobenzoic acid (0.003 mol, 0.4626 g) into the solution in ①, and stir on a constant temperature magnetic stirrer until completely dissolved;

[0030] ③ CoCl 2 ▪6H 2 O (0.0015 mol, 0.3565 g) was completely dissolved in 5 ml of deionized water, and then the solution was slowly dropped into the above solution with a dropper, and continued to stir for half an hour (the cobalt raw material can also be CoSO 4 ▪6H 2 O, Co(NO 3 ) 2 ▪6H 2 O. CoC 4 h 6 o 4 ▪4H 2 O and other commonly used cobalt salts are acceptable);

[0031] ④ Pour the stirred solution into a 30 ml polytetrafluoroethylene-lined stainless steel reaction kettle, and react ...

Embodiment 2-5

[0034] The reaction temperature in step ④ was set to 120°C, 150°C, 180°C, and 200°C respectively, and the other reaction conditions were the same, and a black powder product was prepared.

[0035] The following materials are mainly characterized by products prepared at a temperature of 120 °C, at which the yield of the complex is the highest.

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Abstract

The invention belongs to the field of molecular magnetics, and particularly relates to a novel cobalt (III)-sulfur cluster-based coordination polymer with a single-molecule magnet property. The three-dimensional skeleton of the cobalt (III)-sulfur cluster-based coordination polymer provided by the invention is ([Co(III)3Co(II)2(mba)6(Hdtb)(H2O)4]n). Monocrystal XRD research shows that the polymer is composed of a trinuclear cobalt (III)-sulfur cluster structural unit and two mononuclear cobalt (II), a three-dimensional complex network structure is formed through bridging of a 2-mercaptobenzoic acid divalent anion ligand, and a cobalt (III) atom cluster unit is a trinuclear linear cobalt (III) cluster and serves as a construction unit in the coordination polymer. Magnetics research shows that the slow magnetic relaxation phenomenon of cobalt (II) ions is the characteristic behavior of a single-molecule magnet under the condition of no external direct-current magnetic field.

Description

technical field [0001] The invention belongs to the field of molecular magnetism, and in particular relates to a novel cobalt (III)-sulfur carboxylate coordination polymer with the properties of a single-molecule magnet. Background technique [0002] In recent decades, multinuclear three-dimensional complexes have attracted extensive attention of researchers due to their catalytic, optical, electronic, biological, adsorption and magnetic properties and variable structures. With the rapid development of information technology, molecular-based magnetic materials are increasingly favored by researchers because of their potential applications in high-density information storage, magnetic switches, quantum computers, and spintronics. Among them, studies based on single-molecule magnets (SMMs), single-ion magnets (SIMs) and single-chain magnets (SCMs) are hotspots in this field. Molecular-based magnetic materials, as the name implies, are complexes with magnetic properties, which...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F15/06C08G83/00
CPCC07F15/06C08G83/008
Inventor 李新华朱丽丽张卫兵
Owner WENZHOU UNIVERSITY
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