A kind of multifunctional rare earth complex and its application
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A rare earth complex, multi-functional technology, applied in the application field of dysprosium, to achieve the effect of increasing the application scope, broadening the application scope and reducing the production cost
Inactive Publication Date: 2015-08-05
SUN YAT SEN UNIV
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[0006] Rare earth complexes with optoelectronic and electromagnetic single functions have been widely and intensively studied, but there are no relevant reports in the literature on complexes with three functions of white light LED, ferroelectricity and single molecule magnet.
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Embodiment 1
[0029] Example 1 Preparation of multifunctional rare earth complex
[0030] The specific synthesis method is as follows: dysprosium nitrate hexahydrate (0.043 g, 0.10 mmol), 3,5-bis(2-pyridine)-1,2,4-triazole (0.023 g, 0.10 mmol) and triethyl Amine (0.020 g, 0.2 mmol) was sequentially added to a Teflon-lined stainless steel reaction kettle containing 8 ml of methanol, sealed and airtight. After heating at 120 degrees for 72 hours, it was naturally cooled to room temperature to obtain colorless crystals. The rate is about 32%.
Embodiment 2
[0031] Example 2 Determination of product structure
[0032] The product obtained in Example 1 is determined by single crystal diffraction, elemental analysis and infrared characterization, and its chemical structural formula is dihydroxy·tetranitro·tetra(3,5-bis(2-pyridine)-1,2,4-tris azole)·dimethoxytetradysprosium(III).
[0033] The results of single crystal diffraction are as follows:
[0034]
[0035] Elemental analysis results are as follows:
[0036] Theoretical (%): C, 32.16; H, 2.65; N, 16.99. Found (%): C, 31.97; H, 2.74; N, 17.02. .
[0037] The infrared characterization results are as follows:
[0043] Example 3: At 300 K, taking 200 mg of the product obtained in Example 1 under the action of an alternating electric field of 1500 V and 200 Hz, the obtained saturation polarization was 0.16 μC·cm ?2 , the remanent polarization is 0.10 μC cm ?2 , the result is image 3 shown.
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Abstract
The invention provides a multifunctional rare-earth complex, a preparation method thereof and application of the complex in a white light LED (Light Emitting Diode), a ferroelectric and a monomolecular magnet. The chemical molecular formula of obtained dihydroxyl.tetranitro.tetra(3,5-di(2-pyridine)-1,2,4-triazole).dimethoxy tetra-dysprosium (III) is Dy4(bpt)4(NO3)4(OH)2(OCH3)2.3CH3OH. The multifunctional rare-earth complex provided by the invention can be used for emitting obvious white light at room temperature and normal pressure under exciting light of 210-310 nanometers and transforming a color coordinate CIE from (0.300, 0.310) to (0.308, 0.322), shows the ferroelectric behavior at room temperature and normal pressure under the action of an alternating electric field at 100-1500 V and 200 Hz, achieves the maximal polarization intensity of 0.16 muC.cm<-2> during 1500 V, shows the monomolecular magnet behavior at low temperature in zero external field under the action of an AC (Alternating Current) magnetic field at 1-1488 Hz and achieves the characteristic relaxation time of 2.91*10<-7> s and the effective energy barrier of 115.51 K.
Description
technical field [0001] The invention relates to the application technology field of dysprosium, and more particularly, to a multifunctional rare earth complex photoelectromagnetic material and its application. Background technique [0002] Multifunctional opto-electromagnetic materials refer to functional materials with two or more functions of light, electricity, magnetism, heat, sound, mechanics, etc. At present, complex multifunctional materials with optical, electrical and magnetic properties are a hot spot in the research of new materials. White LEDs are also a promising type of optical lighting materials. Ferroelectric materials are one of pyroelectric materials with broad application prospects. Single-molecule magnets exhibit unique properties at low temperatures and become one of the most promising materials in the field of magnetics. A research hotspot that has received much attention. [0003] White LEDs have very promising application prospects in lighting a...
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