CN104478942B - 一种八核镍金属配合物及其制备方法 - Google Patents
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- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 title claims abstract description 45
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 22
- 239000002184 metal Substances 0.000 title claims abstract description 22
- 229910052759 nickel Inorganic materials 0.000 title claims abstract description 21
- 238000002360 preparation method Methods 0.000 title claims abstract description 13
- 125000003226 pyrazolyl group Chemical group 0.000 claims abstract description 15
- 150000003217 pyrazoles Chemical class 0.000 claims abstract description 11
- 239000000725 suspension Substances 0.000 claims abstract description 10
- 239000002904 solvent Substances 0.000 claims abstract description 9
- 239000007788 liquid Substances 0.000 claims abstract description 6
- 239000000126 substance Substances 0.000 claims abstract description 6
- WMFOQBRAJBCJND-UHFFFAOYSA-M Lithium hydroxide Chemical compound [Li+].[OH-] WMFOQBRAJBCJND-UHFFFAOYSA-M 0.000 claims description 12
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 12
- 238000006243 chemical reaction Methods 0.000 claims description 9
- 239000013078 crystal Substances 0.000 claims description 9
- 238000002156 mixing Methods 0.000 claims description 8
- 241000080590 Niso Species 0.000 claims description 6
- -1 alcohols alkane Chemical class 0.000 claims description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 4
- 238000010583 slow cooling Methods 0.000 claims description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
- 239000010935 stainless steel Substances 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 4
- 238000010792 warming Methods 0.000 claims description 4
- 125000006850 spacer group Chemical group 0.000 claims description 3
- QNRATNLHPGXHMA-XZHTYLCXSA-N (r)-(6-ethoxyquinolin-4-yl)-[(2s,4s,5r)-5-ethyl-1-azabicyclo[2.2.2]octan-2-yl]methanol;hydrochloride Chemical compound Cl.C([C@H]([C@H](C1)CC)C2)CN1[C@@H]2[C@H](O)C1=CC=NC2=CC=C(OCC)C=C21 QNRATNLHPGXHMA-XZHTYLCXSA-N 0.000 claims description 2
- 150000002815 nickel Chemical class 0.000 claims description 2
- 230000015572 biosynthetic process Effects 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 4
- 238000003786 synthesis reaction Methods 0.000 abstract description 4
- 238000013500 data storage Methods 0.000 abstract description 3
- 238000011161 development Methods 0.000 abstract description 3
- 238000003860 storage Methods 0.000 abstract description 3
- 230000005389 magnetism Effects 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000010438 heat treatment Methods 0.000 abstract 1
- 238000001027 hydrothermal synthesis Methods 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000002447 crystallographic data Methods 0.000 description 2
- ITWBWJFEJCHKSN-UHFFFAOYSA-N 1,4,7-triazonane Chemical compound C1CNCCNCCN1 ITWBWJFEJCHKSN-UHFFFAOYSA-N 0.000 description 1
- 241000189662 Calla Species 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 238000002441 X-ray diffraction Methods 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 125000004429 atom Chemical group 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 238000001311 chemical methods and process Methods 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 238000010668 complexation reaction Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000005564 crystal structure determination Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 230000005283 ground state Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000005381 potential energy Methods 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 230000005476 size effect Effects 0.000 description 1
- 238000010189 synthetic method Methods 0.000 description 1
- 230000005641 tunneling Effects 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F15/00—Compounds containing elements of Groups 8, 9, 10 or 18 of the Periodic Table
- C07F15/04—Nickel compounds
- C07F15/045—Nickel compounds without a metal-carbon linkage
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/42—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of organic or organo-metallic materials, e.g. graphene
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Crystals, And After-Treatments Of Crystals (AREA)
Abstract
一种八核镍金属配合物及其制备方法。一种吡唑类配体镍金属配合物,化学式为Ni8<b>L</b>12(H2O)2,化学式中的<b>L</b>为吡唑,其制备方法是在常温下将配体和金属盐混合为悬浊液,将悬浊液经水热反应釜加热反应即可。本发明的优点:该制备方法采用溶剂热条件下合成,工艺简单、产率高、可重现性好;该配合物可以产生分子磁性现象,可作为磁性材料在信息存储、分子开关、电磁成像等领域得到广泛应用,随着高密度信息存储器件的不断进步和迅猛发展,可以预期,它不仅会给分子工程和分子合成提供发展机遇,更会在提高能源效率、降低制造成本等方面有着重大的意义。
Description
技术领域
本发明涉及分子磁性材料领域,特别是吡唑类配体镍金属配合物及其制备方法。
背景技术
分子基纳米磁体是指呈现出量子尺寸效应的超顺磁磁体,主要包括单分子磁体(纳米尺度的簇合物)、单链磁体(纳米尺度的链)和单离子磁体(单离子的3d或稀土金属配合物)。这些分子基纳米磁体不仅表现出超顺磁磁体所具有的量子隧穿效应与缓慢的磁弛豫现象,更重要的是它们均是通过化学方法合成得到的,并且具有可控性好、尺寸均一等特点,一直以来受到化学家和物理学家的极大关注。此外,从应用角度而言,分子基纳米磁体由于其特有的磁性质使得在分子水平上的信息存储得以实现,并为研制和开发高密度信息存储器件提供了可能。
单分子磁体是由单个分子构成的,是具有大的自旋基态S值和负的零场分裂的分子基磁体。从能量的角度考虑,如果某个分子在翻转磁矩方向有一定的势能壁垒,那么这个分子就是单分子磁体;从磁性测量角度看,在低于磁阻塞温度T B温度时,单分子磁体的磁化强度对外磁场的曲线出现磁滞回线并且交流磁化率的虚部具有外场频率依赖性。在二十世纪九十年代,随着第一例单分子磁体[Mn12O12(O2CMe)16(H2O)4]·2CH3COOH·4H2O报道以来,第一例铁基单分子磁体[Fe8O2(OH)12(tacn)6]8+、第一例镍基单分子磁体[Ni12(chp)12(O2CMe)12(thf)6(H2O)6]和第一例钴基单分子磁体[Co4(hmp)4(MeOH)4Cl4]相继得到报道,同时大量的具有单分子磁体行为的金属簇合物被报道。在已报道的金属簇合物中T B温度等主要指标并没有超越第一例的[Mn12]配合物。如何提高T B温度一直是单分子磁体研究中的瓶颈问题。参见:Caneschi, A.; Gatteschi, D.; Sessoli,
R.; Barra, A. L.; Brunel, L. C.; Guillot, M. J. Am. Chem. Soc., 1991,
113 , 5873. Barra, A. l.; Debrunner, P.; Gatteschi, D.; Schulz, C.
E.; Sessoli, R. Europhys. Lett. 1996, 35, 143. Blake, A.
J.; Grant, C. M.; Parsons, S.; Rawson, J. M.; Winpenny, R. J. Chem.
Soc. Chem. Commun., 1994, 2363. Yang, E. C.; Hendrickson, D. N.;
Wernsdorfer, W.; Nakano, M.; Zakharov, L. N.; Somer, R. D.; Rheingold, A. L.;
Ledezma-Gairaud, M.; Christou; G. J. Appl. Phys., 2002, 91,
7382. Winpenny, R. et al.; Single-Molecule Magnets and Related Phenomena,
Springer-Verlag Heidelberg, New York, 2006.
因此,此类配合物在结构和性能的进一步研发方面具有广阔的空间。
目前文献中报道的常用的吡唑类配体镍金属配合物的制备方法采用的是氮气保护下回流反应,然后挥发溶剂得到晶体的合成方法,这种方法存在反应复杂、二价铁容易被氧化、产率低以及可控性差等技术缺陷。
发明内容
本发明的目的是针对上述存在问题,提供一种反应条件简单、产率高、可重现性好的吡唑类配体镍金属配合物及其制备方法。
本发明的技术方案:
一种吡唑类配体镍金属配合物,化学式为Ni8 L 12(H2O)2,化学式中的L为吡唑;该镍金属配合物的晶体属于正交晶系,空间群为Fmmm,晶胞参数为:a = 18.446(4), b = 18.563(4), c =
20.771(4) Å; α = 90, β =
90, γ = 90o; V = 7112(3) Å3。
一种所述吡唑类配体镍金属配合物的制备方法,步骤如下:
1)常温下,将配体吡唑,金属盐NiSO4·6H2O,LiOH混合于醇类烷烃溶液中,搅拌后得到混合悬浊溶液;
2)常温下,将上述混合悬浊液密封于带有聚四氟内衬的不锈钢溶剂热反应釜内,并将反应釜置于烘箱中;
3)烘箱温度在4小时内升温至160 oC,并在160 oC条件下恒温24小时,然后在12小时内缓慢降温至室温;
4)常温下打开溶剂热反应釜,得到绿色晶体即为吡唑类配体镍金属配合物。
所述醇类烷烃溶液的为甲醇,乙醇。
所述配体吡唑与醇类烷烃溶液的用量比为0.05 mol/L。
所述配体吡唑和金属盐NiSO4·6H2O,LiOH的摩尔比为1:2:1。
本发明的优点:该制备方法采用溶剂热条件下合成,工艺简单、产率高、可重现性好;该配合物可以产生分子磁性现象,可作为磁性材料在信息存储、分子开关、电磁成像等领域得到广泛应用,随着高密度信息存储器件的不断进步和迅猛发展,可以预期,它不仅会给分子工程和分子合成提供发展机遇,更会在提高能源效率、降低制造成本等方面有着重大的意义。
附图说明
图1为配合物中Ni原子的配位环境图,图2为配合物的结构示意图(氢原子已删去)。
具体实施方式
实施例1:
一种所述吡唑类配体镍金属配合物的制备方法,步骤如下:
1)常温下,将配体吡唑(0.5 mmol),金属盐NiSO4·6H2O (1 mmol),LiOH (0.5 mmol)混合于10 mL甲醇溶液中,搅拌后得到混合悬浊溶液;
2)常温下,将上述混合悬浊液密封于带有聚四氟内衬的不锈钢溶剂热反应釜内,并将反应釜置于烘箱中;
3)烘箱温度在4小时内升温至160 oC,并在160 oC条件下恒温24小时,然后在12小时内缓慢降温至室温;
4)常温下打开反应釜,得到绿色晶体即为吡唑类配体镍金属配合物。
实施例2:
一种所述吡唑类配体镍金属配合物的制备方法,步骤如下:
1)常温下,将配体吡唑(0.5 mmol),金属盐NiSO4·6H2O (1 mmol),LiOH (0.5 mmol)混合于10 mL乙醇溶液中,搅拌后得到混合悬浊溶液;
2)常温下,将上述混合悬浊液密封于带有聚四氟内衬的不锈钢溶剂热反应釜内,并将反应釜置于烘箱中;
3)烘箱温度在4小时内升温至160 oC,并在160 oC条件下恒温24小时,然后在12小时内缓慢降温至室温;
4)常温下打开反应釜,得到绿色晶体即为吡唑类配体镍金属配合物。
配合物的相关表征及晶体结构测定:
在显微镜下选取上述实施例中制得的的单晶在室温下进行X–射线衍射实验。在SCX-Mini单晶衍射仪上,用经石墨单色器单色化的Mo–K a射线(l =
0.71073 Å),以φ–ω方式收集衍射数据。用Bruker SAINT程序进行数据还原。部分结构的衍射数据用SADABS程序进行吸收校正。晶体结构由直接法结合差值Fourier合成解出。全部非氢原子坐标及各向异性参数进行全矩阵最小二乘法修正,氢原子位置按理论模式计算确定。详细的晶体测定数据见表1。
表 1 :吡唑类配体镍金属配合物的主要晶体学数据
分子式
Ni8C36H40N24O10
分子量
1438.12
晶系
正交
空间群
Fmmm
晶胞参数 (Å, o)
a
18.446(4)
b
18.563(4)
c
20.771(4)
α
90
b
90
γ
90
体积 (Å3)
7112(3)
Z
4
D calLa (g/cm3)
1.306
m (mm– 1)
2.124
T/K
293
Ra &R w b 0.1071/
0.2771
a R = S(||F 0|
-|F C||)/S|F 0|;
b wR = [Sw(|F 0|2 -|F C|2)2/Sw(F 0 2)]1/2。
Claims (2)
1.一种吡唑类配体镍金属配合物,化学式为Ni8 L 12(H2O)2,化学式中的L为吡唑;该镍金属配合物的晶体属于正交晶系,空间群为Fmmm,晶胞参数为:a = 18.446(4), b =
18.563(4), c = 20.771(4) Å; α = 90, β = 90, γ = 90o; V =
7112(3) Å3。
2.一种如权利要求1所述吡唑类配体镍金属配合物的制备方法,其特征在于步骤如下:
1)常温下,将配体吡唑,金属盐NiSO4·6H2O,LiOH混合于醇类烷烃溶液中,搅拌后得到混合悬浊溶液;
所述醇类烷烃溶液的为甲醇或乙醇;
所述配体吡唑与醇类烷烃溶液的用量比为0.05 mol/L;
所述配体吡唑和金属盐NiSO4·6H2O,LiOH的摩尔比为1:2:1;
2)常温下,将上述混合悬浊液密封于带有聚四氟内衬的不锈钢溶剂热反应釜内,并将反应釜置于烘箱中;
3)烘箱温度在4小时内升温至160 oC,并在160 oC条件下恒温24小时,然后在12小时内缓慢降温至室温;
4)常温下打开溶剂热反应釜,得到绿色晶体即为吡唑类配体镍金属配合物。
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WO2011158918A1 (ja) * | 2010-06-17 | 2011-12-22 | 株式会社日本触媒 | 多核金属化合物 |
CN102399246A (zh) * | 2011-09-07 | 2012-04-04 | 汕头大学 | 金属镍-咪唑手性纳米笼配合物及其制备方法 |
CN104086600A (zh) * | 2013-04-02 | 2014-10-08 | 西北大学 | 碗碟型七核镍簇合物及其合成方法 |
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CN1861617A (zh) * | 2005-05-12 | 2006-11-15 | 青岛科技大学 | 一种制备2-巯基苯并噻唑过渡金属簇合物的方法 |
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