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氮氧自由基单核钬配合物的合成与结构 总被引:1,自引:0,他引:1
A novel mononuclear Ho(Ⅲ) nitronyl nitroxide complex [Ho(hfac)3(NITPhDma)2], (NITPhDma=2-(4-dimethylamino-phenyl)-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide, hfac=hexafluoroacetylacetonate), was synth-esized and structurally characterized by X-ray diffraction. It crystallizes in monoclinic, space group P21/n with a=1.274 5(1) nm, b=1.753 1(2) nm, c=2.482 8(2) nm, β=93.753(2)°. The Ho(Ⅲ) ion is eight-coordinated with a distorted dodecahedron environment. Each NITPhDma radical acts as monodentate ligand towards Ho(Ⅲ) ion through the NO group, and the complex molecules are well isolated. CCDC: 775839. 相似文献
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用二氰化银盐(Ag(CN)2-)和氮氧自由基反应合成了一种新的一维配合物[Ag(im2-py)(CN)]n(im2-py=2-(2′-pyridyl)-4,4,5,5-tetramethylimidazoline-1-oxyl)。利用X-射线单晶衍射、元素分析、红外和紫外光谱进行了表征。晶体结构分析表明,配合物晶体属正交晶系,空间群P212121,晶胞参数:a=9.6074(6),b=9.8668(8),c=14.8589(14),V=1408.5(2)3,Z=4,R1=0.0594,wR2=0.121。配合物晶体结构中,每个Ag(Ⅰ)采用四配位的变形四面体构型,每个氰根阴离子通过单齿配位模式连接两个Ag(Ⅰ)离子形成一维链状结构,一维链状结构通过分子间的C-H…O和C-H…N氢键作用扩展为二维网状结构。 相似文献
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以2,6-二甲基吡啶-3,5-二羧酸(H2L1)为主配体,1,10-菲咯啉(L2)为辅配体,分别与五水合硝酸镝、六水合硝酸铽及六水合硝酸铕通过水热法合成[Dy2(L1)3(L2)2]n(1)、{[Tb2(L1)3(L2)2]·5H2O}n(2)和{[Eu2(L1)3(L2)2]·5H2O}n(3)三种配合物。通过单晶X射线衍射、红外光谱、荧光光谱和热重分析对其结构进行了表征与性质研究。结果表明,配合物1~3均以稀土离子为金属节点连接配体L12-和L2,形成无限延伸的一维链状结构。 相似文献
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以氮氧自由基为配体,合成了3例氮氧自由基-稀土三自旋单核配合物[Ln(hfac)3(NIT-Ph-4-Br)2](Ln=Gd(1),Tb(2),Dy(3),hfac=六氟乙酰丙酮,NIT-Ph-4-Br=4,4,5,5-四甲基-2-(4''-溴)-咪唑啉-3-氧化-1-氧基自由基。单晶结构分析表明3个配合物均属单斜晶系P21/c空间群,配合物中的Ln(Ⅲ)离子为八配位模式,并且拥有相似的自由基-稀土-自由基单核结构。对配合物的磁性测试结果表明,配合物1中自由基与Gd(Ⅲ)离子之间存在着铁磁相互作用,自由基与自由基之间存在着反铁磁相互作用;配合物2,3中,稀土离子与自由基之间存在弱的反铁磁相互作用。 相似文献
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以氮氧自由基为配体,合成了3例氮氧自由基-稀土三自旋单核配合物[Ln(hfac)3(NIT-Ph-4-Br)2](Ln=Gd(1),Tb(2),Dy(3),hfac=六氟乙酰丙酮,NIT-Ph-4-Br=4,4,5,5-四甲基-2-(4''-溴)-咪唑啉-3-氧化-1-氧基自由基。单晶结构分析表明3个配合物均属单斜晶系P21/c空间群,配合物中的Ln(Ⅲ)离子为八配位模式,并且拥有相似的自由基-稀土-自由基单核结构。对配合物的磁性测试结果表明,配合物1中自由基与Gd(Ⅲ)离子之间存在着铁磁相互作用,自由基与自由基之间存在着反铁磁相互作用;配合物2,3中,稀土离子与自由基之间存在弱的反铁磁相互作用 相似文献
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采用溶液合成法, 在室温下合成了一系列稀土配合[Ln(IAA)2(phen)2]·(NO3)[Ln=Ce(1), Gd(2), Tb(3), Dy(4), Ho(5), HIAA=吲哚乙酸, phen=1,10-菲咯啉], 并通过元素分析、 红外光谱、 热重分析、 X射线单晶衍射、 X射线粉末衍射等方法对配合物进行了表征. 结果表明, 配合物15具有相同的结构, 对配合物2的单晶结构分析表明, 配合物2为超分子网络结构, 通过分子间氢键形成2D网络, 中心金属Gd(Ⅲ)为九配位, 具有单帽四方反棱柱几何构型. 此外, 对该系列配合物进行了抑菌活性的研究, 得到了抑菌活性与配合物组成的构效关系. 相似文献
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合成和表征了3个杂冠醚配体(L1:单氮杂15C5,L_Ⅱ:单氮杂18C6,L_Ⅲ:1,7—二硫杂18C6)与稀土硝酸盐的配合物:〔Ln(NO_3)_3L_Ⅰ〕(Ln=La~Pr),[Ln-(NO_3)-3L_ Ⅱ〕(Ln=La~Pr),〔HL_Ⅱ〕~+〔Ln(NO_3)_4(OH_2)_2〕~-(Ln=Nd,Sm~Er,Yb),〔Ln(NO_3)_3.L_Ⅲ’(H_2O)](Ln=La~Nd,Sm~Er,Yb),其中L_Ⅲ’表示L_Ⅲ冠醚环上的2个硫原子在与稀土硝酸盐反应的过程中被氧化为亚砜.配合物〔HL_Ⅱ〕~+[Nd(NO_3)_4-(OH_2)_2]的晶体属单斜晶系,空间群P2_1/n,a=1.644 0(5),b=1.739 2(3),c=1.867 5(4)nm,β=107.26(2)°.Z=8,Nd~(+3)与4个二齿NO_3~-和2个水分子配位,形成长链状夹心式结构;配合物〔Er(NO_3)_3L_Ⅲ’(H_2O)〕·CH_3COCH_3的晶体为P2_1/n空间群,a=0.877 2(2),b=1.817 9(7),c=1.854 0(5)nm,β=103.50(3)°,Z=4,Er~(3+)与3个二齿NO_3~-、1个水分子及2个亚砜氧原子形成配位数为9的配合物. 相似文献
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合成了一个新颖的氮氧自由基配体,并用该配体合成了3例未见文献报道的氮氧自由基-稀土三自旋单核配合物Ln(hfac)3(NIT-Ph-4-OCHCH3CH3)2(Ln=Gd(1), Tb(2), Dy(3); hfac=六氟乙酰丙酮; NIT-Ph-4-OCHCH3CH3=4,4,5,5-四甲基-2-(4'-异丙氧基苯基)-咪唑啉-3-氧化-1-氧基自由基)。单晶结构分析表明配合物1、2、3拥有相似的自由基-稀土-自由基单核结构。对配合物的磁性测试结果表明自由基与稀土之间存在着铁磁相互作用。自由基与自由基之间存在着反铁磁相互作用。 相似文献
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A new lanthanide complex [Sm(C2O4)(H2O)5]nCln·2nH2O has been obtained by hydrothermal synthetic method. The crystal belongs to monoclinic, space group P21/n, with a = 7.5438(6), b = 14.3201(11), c = 10.8608(9) , β = 94.565(4)o, V = 1169.55(16) 3, C2H14ClO11Sm, Mr = 399.93, Z = 4, Dc = 2.271 g/cm3, μ = 5.290 cm1, F(000) = 772, the final R = 0.0271 and wR = 0.0632 for 1880 observed reflections with I > 2σ(I). X-ray crystal analysis reveals that each Sm(III) atom is nine-coordinated by four oxygen atoms from two oxalate ligands and five coordinated water molecules in a distorted tricapped trigonal prism. The chain-like structure of lanthanide oxalate is reported for the first time. The fluorescent property and magnetic behavior of the title compound were investigated. The θ of –14.3(2)° and J of –0.26 cm-1 indicate antiferromagnetic interaction in the molecule. 相似文献
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以邻氨基苯甲酸甲酯和4-二乙胺基水杨醛为原料,合成了一个新的香豆素喹啉衍生物3-{2-[8-(1H-苯并咪唑-2-基)喹啉-2-基]乙烯基}-7-二乙胺基香豆素(QMC),再与BF3·Et2O配位合成了硼氟配合物(BQMC),其结构经1H NMR和MS(ESI)表征。并对BQMC的光学性能进行了研究。结果表明:BQMC的最大吸收波长在二氧六环中为490 nm,在DMSO中为532 nm; BQMC的最大发射波长在正己烷中为618 nm,在DMSO中为679 nm,与配体QMC相比,最大吸收波长红移了近50 nm,最大发射波长红移了近100 nm, BQMC的Stokes位移值从115 nm增至183 nm。在固态下,BQMC在750~825 nm之间有较宽的荧光发射峰,具有较强荧光。 相似文献
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Yue Ma Wei Zhang Gong‐Feng Xu Kazuyoshi Yoshimura Dai‐Zheng Liao Prof. Zong‐Hui Jiang Shi‐Ping Yan 《无机化学与普通化学杂志》2007,633(4):657-660
A novel heterospin complex containing both NiII and nitroxide radical ligands: [Ni(salox)2(NIT4Py)2] ( 1 ) (salox = salicylaldoxime, NIT4Py = 2‐(4′‐pyridyl)‐4,4,5,5‐ tetramethyl‐imidazoline‐1‐oxyl‐3‐oxide) has been synthesized and structurally characterized. The structure consists of neutral Ni(salox)2(NIT4Py)2 moieties bridged by intermolecular hydrogen bonds, forming a one‐dimensional chain structure. Magnetic measurements show intramolecular antiferromagnetic interactions between NIT4Py and Ni2+ ion. 相似文献
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1 INTRODUCTION The synthesis and study of transition metal com-plexes incorporating organic free radicals have arou-sed great interest in the field of molecular magne-tism[1]. Nitronyl nitroxide radicals (NITR), stable or-ganic radicals, have been widely used as molecularunits in the design and construction of magnetic ma-terials[2~5]. These radicals are especially attractivedue to that their donor atoms can assemble an exten-ded coordination geometry with changing magneticcoupling. A… 相似文献
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A new complex [Zn(NIT-1'-MeBzIm)Cl2(H2O)] (NIT-1'-MeBzIm = 2-{2'-[(l'- methyl)benzimidazolyl]}-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide) has been prepared and structurally characterized by X-ray diffraction method. Crystal data: monoclinic, space group P21/n, Z = 4, C15H21Cl2N4O3Zn, Mr = 441.63, a = 7.2225(10), b = 30.849(4), c = 8.8758(13) , β = 103.904(2)°, V = 1919.6(5) 3, Dc = 1.528 g/cm3, μ(MoKα) = 1.579 mm1, F(000) = 908, R = 0.0436 and wR = 0.1029 for 2456 observed reflections with I > 2σ(I). X-ray analysis reveals that the Zn(II) ion is four-coordinated with a distorted tetrahedron. There also exist H-bonds, π-π piling interactions and weak intermolecular contacts between the NO groups which form a mutual stagger 3-D network configuration. Magnetic investigation reveals that there exists intermolecular antiferro- and ferromagnetic interactions in the title complex. 相似文献
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含咪唑基配体的Co(Ⅱ)超分子配合物的合成、晶体结构和光谱性质 总被引:6,自引:0,他引:6
采用改进的固相Wittig反应, 合成了一种新型的具有电子给受体和π共轭结构的咪唑衍生物1-{反式4-[4-(-N,N-二乙基氨基)苯乙烯基]苯}咪唑(C21H23N3, 简作L). 室温下, 将L与Co(SCN)2在甲醇中反应, 合成了配合物Co(SCN)2(C21H23N3)4. X射线单晶衍射分析结果表明, 该晶体属于三斜晶系, P1空间群, 晶胞参数a=0.931 7(3) nm, b=1.275 3(4) nm, c=1.669 1(5) nm, α= 89.521(5)°, β=84.591(5)°, γ=80.052(5)°, V=1.944 6(11) nm3, Z=1, μ=0.329 mm-1, Dc=1.234 Mg/m3, F(000)=765, R1=0.060 1, wR=0.138 1, GOF=1.030, 中心原子Co(Ⅱ)的配位数为6, 分别与来自4个L的咪唑N及2个SCN-的N配位, 形成八面体的空间构型. 配合物分子通过非典型氢键和π-π堆积作用形成三维超分子结构. 研究结果表明, 配合物具有很好的光学性质. 相似文献
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以草酰胺铜配合物CuL(H2L=2,3-二氧-5,6 :13,14-二联苯基-9,10-环己基-1,4,8,11-四氮杂十四环-7,12-二烯烃)为前驱配体,1,10-邻菲啰啉为端接配体,高氯酸锰为金属核心,经回流反应合成了一个新型的异双核配合物[CuLMn(phen)2](ClO4)2·2CH3OH(1),其结构和性能经UV-Vis, IR,元素分析,X-射线粉末衍射和X 射线单晶衍射表征。结果表明:1(CCDC: 1 445 582)属三斜晶系,空间群P-1,晶胞参数a=11.298(19) , b=15.17(4) , c=16.71(3) ,α=113.69(3), β=109.30(2), γ=93.08(4), V=2 417(9) 3, Z=2。 1在DMF中的最大吸收峰位于272 nm和361 nm。 相似文献
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A new one-dimensional dicyanamide bridged zinc(II) complex containing nitronyl nitroxide radicals Zn(NO3)(NIT-1'-MeBzIm)(dca)n·(H2O)n(NIT-1'-MeBzIm = 2-{2'-(l'-me-thyl)benzimidazolyl}-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide, dca = dicyanamide anion) has been prepared and structurally characterized by single-crystal X-ray diffraction.The complex crystallizes in triclinic, space group P1, with a = 7.428(3), b = 9.839(3), c = 16.708(6), α = 93.270(4), β = 101.642(4), γ = 100.632(4)°, C17.5H21N8O5.5Zn, Mr = 496.79, V = 1169.7(7) 3, Dc = 1.411 g/cm3, μ(MoKα) = 1.096 mm-1, Z = 2, F(000) = 512, R = 0.0583 and wR = 0.1663 for 4295 observed reflections with I > 2σ(I).X-ray analysis reveals that the zinc(II) ion is six-coordinated with a distorted octahedral geometry.These units develop as 1D species where dicyanamide ligands bridge zinc(II) ions.In addition, molecules are linked by π-π piling interactions to form 1-D double-chains.Magnetic investigation indicates that the weak intramolecular interactions are antiferromagnetic with J =-0.27 cm?1, where the spin Hamitonian is defined as H =-2∑i,jJi,jSiS within the complex. 相似文献