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[Co2(dba)(bpe)(OH)](H2O)] antiferromagnetic complex and preparation method thereof

A technology of 2·6H2O and complexes, which is applied in the direction of antiferromagnetic materials, magnetic objects, organic chemical methods, etc., can solve the problems of high requirements for reaction conditions and complex operations, and achieve strong chemical stability, simple operation process, and improved performance effect

Inactive Publication Date: 2018-10-23
SHAANXI UNIV OF SCI & TECH
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  • Abstract
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  • Application Information

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Problems solved by technology

[0003] The purpose of this invention is to provide a kind of [Co 2 (dba)(bpe)(OH)](H 2 O)] antiferromagnetic complexes and preparation methods thereof, obtained based on 2-(3 ', 4'-dicarboxybenzene) benzoic acid (dba), bispyridylethylene (bpe) and cobalt (Co 2+ ) complexes, the preparation method overcomes the problems of high requirements for reaction conditions and complex operations in the prior art

Method used

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  • [Co2(dba)(bpe)(OH)](H2O)] antiferromagnetic complex and preparation method thereof

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preparation example Construction

[0033] The above [Co 2 (dba)(bpe)(OH)](H 2 O)] the preparation method of antiferromagnetic complex, comprises the following steps:

[0034] Step 1: Dissolve 0.2mmol cobalt salt in 15-18ml distilled water to obtain solution A, according to cobalt salt: H 3The molar ratio of dba:bpe is 1:(0.5~2):(0.5~2) and the ratio of H 3 Add dba and bpe to solution A in turn, adjust the pH=8.0, stir for 1 hour to obtain suspension system B, transfer B to a 25mL polytetrafluoroethylene reaction liner, seal the reaction kettle, and store in water at 120°C to 150°C The thermal reaction was carried out for 48 hours, and after the reaction was completed, the temperature was lowered to room temperature at a rate of 5°C / h;

[0035] Step 2: Filter the red crystals obtained in Step 1, wash and dry to obtain the complex [Co 2 (dba)(bpe)(OH)](H 2 O).

[0036] Described cobalt salt is Co(NO 3 ) 2 ·6H 2 O or CoSO 4 ·7H 2 O.

Embodiment 1

[0038] Step 1: Add 0.2mmol Co(NO 3 ) 2 ·6H 2 O was dissolved in 15mL distilled water to obtain solution A, and 0.1mmol H was weighed 3 Add dba and 0.1mmol bpe to solution A in sequence, stir for 1 hour, adjust pH=8.0 to obtain suspension system B, transfer B to 25mL polytetrafluoroethylene reaction liner, seal the reaction vessel, and conduct hydrothermal reaction at 120°C Carried out for 48 hours, and after the reaction was completed, the temperature was lowered to room temperature at a rate of 5°C / h.

[0039] Step 2: Filter the red crystals obtained in Step 1, wash and dry to obtain the complex [Co 2 (dba)(bpe)(OH)](H 2 O), the yield is 71%.

[0040] Step 3: At room temperature for [Co 2 (dba)(bpe)(OH)](H 2 O) magnetic tests were carried out, showing antiferromagnetic properties.

Embodiment 2

[0042] Step 1: Add 0.2mmol Co(NO 3 ) 2 ·6H 2 O was dissolved in 15mL distilled water to obtain solution A, and 0.2mmol H was weighed 3 Add dba and 0.1mmol bpe to solution A in sequence, stir for 1 hour, adjust pH=8.0 to obtain suspension system B, transfer B to 25mL polytetrafluoroethylene reaction liner, seal the reaction vessel, and conduct hydrothermal reaction at 140°C Carried out for 48 hours, and after the reaction was completed, the temperature was lowered to room temperature at a rate of 5°C / h.

[0043] Step 2: Filter the red crystals obtained in Step 1, wash and dry to obtain the complex [Co 2 (dba)(bpe)(OH)](H 2 O), the productive rate is 60%.

[0044] Step 3: At room temperature for [Co 2 (dba)(bpe)(OH)](H 2 O) magnetic tests were carried out, showing antiferromagnetic properties.

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Abstract

The invention discloses a [Co2(dba)(bpe)(OH)](H2O)] antiferromagnetic complex and a preparation method thereof. The antiferromagnetic complex is composed of 2-(3',4'-dicarboxylphenyl)benzoic acid (H3dba), bipyridyl ethylene (bpe) and cobalt, has a three-dimensional compact structure and has P21 / n space groups, wherein crystallographic parameters a = 10.8399(10) angstrom, b = 14.3010(13) angstrom,c = 17.0860(15) angstrom, alpha = 90 degrees, beta = 91.10 degrees, gamma = 90 degrees, and V = 2648.2 angstrom<3>. The complex has excellent antiferromagnetic property. The invention also discloses apreparation method of the complex by performing a hydrothermal reaction to cobalt salt, H3dba and bpe in a polytetrafluoroethylene reaction liner and filtering, washing and drying a product. The method employs economic and practical raw materials, is high in yield, has simple operation process and gentle conditions, is easy to control and is green and environment-friendly.

Description

technical field [0001] The invention belongs to the technical field of metal-organic coordination polymers, in particular to a [Co 2 (dba)(bpe)(OH)](H 2 O)] antiferromagnetic complexes and methods for their preparation. Background technique [0002] Metal-organic coordination polymers (referred to as complexes) are a special class of materials formed by organic ligands and metal ions under artificial regulation or self-assembly conditions, in which the geometric shape of the organic ligands, the type and number of functional groups, Rigidity and flexibility are very critical factors affecting the structure and properties of complexes. From the point of view of the rigidity and flexibility of ligands, flexible ligands are easier to adapt to the reaction system, spontaneously reduce steric hindrance, and obtain a more stable complex system; And the directional extension of the system plays a key role; from the perspective of the number and position of functional groups, org...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F15/06H01F1/00
CPCC07F15/065C07B2200/13H01F1/0009
Inventor 庞凌燕张晨鸽刘辉李军奇高娇娇
Owner SHAANXI UNIV OF SCI & TECH
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