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1.
由2-(4’-羧基苯基)咪唑-4,5-二羧酸(HCPhIDC,C12H8N2O6,H4L)和稀土硝酸盐合成了两个稀土配合物[Ln(HCPhIDC)(H2O)2]·3H2O(Ln=Gd(1),Dy(2)),通过元素分析、红外光谱对其进行表征,用单晶X射线衍射方法测定了配合物的晶体结构。结构分析表明:两种晶体属于异质同晶型,同属于三斜晶系,空间群为P1,具有(3,6)-双节点的二维(43)(46·66·83)拓扑结构。测定了配体和配合物与EBDNA体系的作用,结果表明:配体本身对DNA的插入作用很强,而在与稀土离子形成配合物以后,其插入作用反而减弱,这是由于配体本身的分子结构具有良好的平面性,可以很好地插入到DNA的双螺旋结构中,当形成配合物后,整个分子的平面性反而降低了,从而导致插入作用减弱,因此猝灭常数大大降低。 相似文献
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在溶剂热条件下,由2-(4′-羧基苯基)咪唑-4,5-二羧酸(H_4L,C_(12)H_8N_2O_6),合成了4个配位聚合物{[M(H_3L)_2]·2H_2O}_n(M=Zn(1),Cd(2),Co(3)),[Cd(H_2L)(H_2O)]_n(4)。用元素分析、红外光谱、热重分析和单晶X射线衍射对配合物进行了表征和结构分析。结构分析结果表明:1~3是异质同晶。配体失去1个质子以H_3L~-的形式通过单齿和N,O-双齿螯合的配位模式与中心金属离子配位,构成一个略有变形的八面体结构。对于配合物4来说,配体失去2个质子以H_2L~(2-)的形式分别通过单齿和N,O-双齿螯合的配位方式与Cd~(2+)配位,中心离子采取扭曲的七配位五角双锥配位模式,并且通过配体苯环上羧基氧原子的双齿桥联作用连接2个中心离子,形成四元环的双核结构;同时呈现双节点(3,6)-连接的二维拓扑网络(4.4.4)(4.4.4.4.4.4.5.6.6.6.6.6)。测定了产物的固体荧光光谱;用EtBr荧光探针法研究了配体及配合物与ct-DNA的相互作用。 相似文献
3.
以2-(4''-羧基苯基)咪唑-4,5-二羧酸(H4CPhIDC,C12H8N2O6)为配体,用溶剂热合成了3种配位聚合物{[Cd2(CPhIDC)(bimb)]·H2O}n(1)、{[Cd2(CPhIDC)(phen)2]·3H2O}n(2)、{[Zn2(CPhIDC)(bpp)]·1.5H2O}n(3)(bimp=1,4-双咪唑基-丁烷,phen=1,10-菲咯啉,bpp=1,3-双(4-吡啶基)-丙烷)。用元素分析、红外光谱、粉末X射线衍射和单晶X射线衍射对配合物进行了表征和结构分析。结构分析表明,主配体以完全去质子化CPhIDC4-的形式与中心金属离子形成以μ4和μ5为配位模式的二维及三维聚合物。配合物1和3是三维网络结构,同时呈现(3,4,5)-连接的(5·6·7)(4·52·6·72)(4·52·6·74·82)拓扑结构,两者的不同之处是中心离子和辅助配体。配合物2是二维波纹状渔网结构,呈现44·62拓扑结构,在其空间填充上又类似于DNA双螺旋链的单螺旋结构。测定了产物的固体荧光光谱;用EtBr荧光探针法研究了配体及配合物与ct-DNA的相互作用。 相似文献
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在水热条件下,以2-(4-吡啶基)-1H-咪唑-4,5-二羧酸(H3PIDC)和1,10-菲咯啉衍生物为混合配体合成了2个镉(Ⅱ)配合物{[Cd3(HPIDC)3(DPPZ)3]·7H2O}n(1)和[Cd(HPIDC)(Imphen)(H2O)]2(2)(DPPZ=二吡啶并[3,2-a:2',3'-c]吩嗪;Imphen=咪唑并[4,5-f][1,10]菲咯啉),利用元素分析、红外光谱以及单晶X-射线衍射表征其结构。分析表明配合物1和2分别为一维链状与零维结构。此外,2个配合物展示了优良的热稳定性及光致发光特性。 相似文献
7.
在水热条件下, 以2-(4-吡啶基)-1H-咪唑-4, 5-二羧酸(H3PIDC)和1,10-菲咯啉衍生物为混合配体合成了2个镉Ⅱ配合物{[Cd3(HPIDC)3(DPPZ)3]·7H2O}n(1)和[Cd(HPIDC)(Imphen)(H2O)]2 (2)(DPPZ=二吡啶并[3, 2-a:2', 3'-c]吩嗪;Imphen=咪唑并[4, 5-f][1, 10]菲咯啉), 利用元素分析、红外光谱以及单晶X-射线衍射表征其结构。分析表明配合物1和2分别为一维链状与零维结构。此外, 2个配合物展示了优良的热稳定性及光致发光特性。 相似文献
8.
《化学通报》2015,(12)
用缩合氧化反应,成功合成了一个新的咪唑羧酸配体2-(4’-羧基苯基)咪唑-4,5-二羧酸(H4CPhI DC)。在水热条件下以H4CPhI DC为主配体,邻菲咯啉(phen)为辅助配体,合成了镉的六核金属有机配合物[Cd6(CPhI DC)(HCPhI DC)2(H2CPhI DC)(phen)6]·H2O(MOF)。H4CPhI DC配体在该配合物中呈现出不同的去质子模式H-2CPhI DC2、HCPhI DC3-、CPhI DC4-,从而形成了一个新的六核(3,3,4,5)-连接拓扑结构。测定了配体和配合物的固体荧光光谱,并用溴化乙锭荧光探针测定了配体和配合物与DNA及BSA的作用,结果表明,配合物对生物大分子的作用更强些。CCDC:969815。 相似文献
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合成了一种用于醇类分析的高灵敏度的荧光衍生化试剂2(4羧基苯基)4,5萘并咪唑(CNI),将其在二氯甲烷中于80℃条件下与醇缩合成酯,并采用RPHPLC法进行分离检测,色谱柱为ZorbaxBpC8柱(250mm×4.6mmi.d.),流动相为V(乙腈)∶V(甲醇)=90∶10的溶液,荧光检测波长λex345nm,λem485nm。同时,测定了人血清中的胆固醇,其最低检出质量浓度为1.0μgL。 相似文献
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合成了一种用于醇类分析的高灵敏度的荧光衍生化试 剂2-(4-羧基苯基)-4,5-萘并咪唑(CNI),将其在二氯甲烷中于80 ℃条件下与醇缩合成酯 ,并采用RP-HPLC法进行分离检测,色谱柱为Zorbax Bp C8柱(250 mm×4.6 mm i.d.) ,流动 相为V(乙腈)∶V(甲醇)=90∶10的溶液,荧光检测波长λex 345 nm, λem 485 nm。同时,测定了人血清中的胆固醇,其最低检出质量浓度为1.0 μg /L。 相似文献
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Two novel non-centrosymmetric coordination polymer, [Zn2(PIDC)(H2O)Cl]n (1) and {[Mn(HPIDC)H2O]·2H2O}n (2) have been synthesized through hydrothermal method and characterized by IR, elemental analysis and single-crystal X-ray diffraction. Complex 1 crystallized in a chiral space group P212121 has a 2D network structure. Complex 2 is a 3D open framework with 1D channel where 1D zigzag water chains are reside through hydrogen-bonding interactions and crystallized in a chiral space group Cc. Both 1 and 2 display a strong second harmonic generation (SHG) response. 相似文献
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《Journal of Coordination Chemistry》2012,65(3):533-544
Two 1-D and 3-D Ag(I) complexes involving 2-(pyridin-4-yl)-1H-imidazole-4,5-dicarboxylic acid (H3PIDC) have been characterized by infrared spectrum, elemental analysis, and single-crystal X-ray diffraction. [Ag2(HPIDC)]n (1), synthesized under hydrothermal conditions, gave a 3-D framework; [Ag2(HPIDC)(MBI)]n (2) (MBI?=?2-methyl-1H-benzo[d]imidazole), with MBI as the second ligand, gave a 1-D zigzag chain and further formed a 3-D supramolecular structure through π···π interactions. The most interesting structural features of these complexes are the presence of C–H···Ag hydrogen bonding interactions and Ag···C weak interactions between the Ag centers and H3PIDC. Luminescence indicates that 2 has significantly stronger fluorescent emissions than 1 in the solid state at room temperature. 相似文献
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《Journal of Coordination Chemistry》2012,65(24):4188-4200
Four complexes, [Ag4(bipy)2(Himdc)2(H2O)2] n (1), [Ag(H2imdc)] n (2), [K(H3imdc)(H2imdc)(H2O)2] n (3), and [Cu(Himc)2] (4) (H3imdc?=?1H-imidazole-4,5-dicarboxylic acid, H2imc?=?1H-imidazole-2-carboxylic acid, and bipy?=?4,4′-bipyridine), were hydrothermally synthesized and characterized by single-crystal X-ray diffraction analysis and elemental analysis. The obtained complexes exhibit different coordination structures; 1 contains a 2-D supramolecular layer based on two chains arraying uniformly in an ABAB manner. Compound 2 displays sawtooth-shaped 1-D chains extending to 2-D layers via hydrogen bond interactions. Compound 3 possesses a 3-D framework structure based on a 1-D chain via hydrogen bonding interactions. Compound 4 has a 3-D framework structure bearing a pcu-type topology. In addition, the photoluminescence for 1 has been investigated. 相似文献
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通过水热方法 ,采用H3pimda(2-propyl-1H-imidazole-4,5-dicarboxylic acid)与CdSO4.8/3H2O和Nd2O3反应,合成了1个具有一维孔道的配位聚合物[Cd(H2pimda)2]n(1),并对其结构和荧光性质进行了研究。结构分析结果表明该聚合物的晶体属于单斜晶系,P21/n空间群。4个H2pimda-配体桥联4个镉(Ⅱ)离子形成了1个方环,这些环通过镉(Ⅱ)离子与H2pimda-配体的配位作用形成了1个具有一维孔道的三维框架结构。值得关注的是配合物1的晶体呈现一种微米管的外型。研究表明,该聚合物中在室温下能发出很强的兰色荧光。 相似文献
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A novel compound, {[Y(HPIDC)(OX)1/2(H2O)]·2H2O}n (1, H3PIDC = 2-(pyridin-4- yl)-1H-imidazole-4,5-dicarboxylic acid, H2OX = oxalic acid), has been synthesized under hydrothermal conditions and characterized by thermal analysis (TGA), powder X-ray diffraction (PXRD), and single-crystal X-ray diffraction. Complex 1 crystallizes in monoclinic space group P21/c with a = 8.342(8), b = 14.61(1), c = 11.487(1), β = 90.78(9)°, V = 1400.4(2)3, Z = 4, C11H11N3O9Y, Mr = 418.14, Dc = 1.983 g/cm3, F(000) = 836, Rint = 0.0509, T = 293(2) K, μ = 4.240 mm-1, the final R = 0.0477 and wR = 0.1125 for 2770 observed reflections with I > 2σ(I). Compound 1 exhibits a 3D framework and generates the 1D open channels filled with free water molecules. The structure of 1 can be rationalized as a diamondoid network when the atom yttrium is regarded as a 4-connected node linking four surrounding yttrium atoms. The luminescent property of compound 1 is also investigated. 相似文献
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合成了一个双核钙配合物{[Ca2(μ3-HMIA2-)(μ5-HMIA2-)(H2O)].H2O}n(1,H3MIA=2-甲基咪唑-4,5-二羧酸),并用元素分析、红外光谱和X-射线单晶衍射等对其进行了表征。结构分析表明,1属单斜晶系,P21/c空间群,晶胞参数为a=0.860 67(11)nm,b=1.656 5(2)nm,c=1.269 24(16)nm,β=108.005 0(10)°,V=1.720 9(4)nm3,C12H10Ca2N4O10,Mr=450.40,Z=4,Dc=1.728 g.cm-3,F(000)=920,μ=0.727 mm-1,S=1.041,λ(Mo Kα)=0.071 073 nm,R=0.026 0 and wR=0.063 8。在1晶体结构中,每个钙(Ⅱ)离子都是7配位的,但展现2个不同的配位环境。4个μ3-HMIA2-配体,2个μ5-HMIA2-配体和8个钙(Ⅱ)离子形成一个平行六面体结构[Ca8(μ3-HMIA)4(μ5-HMIA)2]4+。μ5-HMIA2-配体采用独特的配位模式并连接周围的平行六面体结构形成一维链结构,配体μ3-HMIA2-连接相邻的一维链形成一种新的蜂窝型的二维层状结构,相邻的二维层通过μ3-HMIA2-配体的2个氧原子进一步形成一个三维结构。还研究了配合物1的热重分析和抑菌活性。CCDC:869134。 相似文献
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A new Gd coordination polymer based on 2-(pyridin-4-yl)-I H-imidazole-4,5-dicarboxylate (H3PIDC) has been synthesized under hydrothermal conditions, formulated as {[Gd3(HPIDC)3(PIDC)(H2O)4].3H2O}n (1). The compound crystallizes in the monoclinic system, space group C2/c with a=20.951(7), b = 9.515(3), c = 27.483(10) A,β= 106.176(6)°, Z = 4, V= 5262(3) A3, C40 H45 Gd3 N12 O30, Dc = 2.071 g/cm3, Mr=1645.63, λ (MoKa)=0.71073A, μ=3.846mm-1, F(000)=3204, the final R=0.0390 and wR= 0.1332. Complex 1 is a two-dimensional MOF built up from T-shaped 3-connected HPIDC2 , PIDC3 and 4-connected metal nodes. Dielectric constant of complex 1 was measured at different frequencies with temperature variation. 相似文献
18.
《Journal of Coordination Chemistry》2012,65(16-18):3021-3033
AbstractThree uranyl-containing coordination polymers, Cd(UO2)2(cpt)4(bdc)(H2O)2 (1), Zn(UO2)2(cpt)4(bdc)(H2O)2 (2) and UO2(OH)(cpt) (3) (Hcpt =4-(4’-carboxyphenyl)-1,2,4triazole, H2bdc =1,4-benzenedicarboxylic acid), have been synthesized under hydrothermal conditions by employing a bifunctional ligand (Hcpt) with both O-donors and N-donors. Compound 1 represents a 3-D framework with the point symbol of (62·84)(62·8)2 by the intersection of two sets of 1-D [Cd2(UO2)2(cpt)4(bdc)]n loop chains extended along different directions. Compound 2 exhibits a 2-nodal (3,4)-connected 2-D network with the point symbol (4·62)2(42·62·82). Compound 3 shows a 2-D network by the assembly of uranyl dimers and the cpt- anions. Although 1 and 2 have similar chemical formulas and the same coordination modes of ligands and metal centers, they possess totally different molecular frameworks, derived from the different radii of the secondary metal centers, Cd(II) and Zn(II). In addition, the optimal synthesis condition, thermal stability, luminescent properties, and IR spectra of 1 and 2 were also investigated. 相似文献
19.
TU Yong-Gang XIONG Zhi-Qiang SONG Xiu-Ying NIE Xu-Liang WEN Shi-He LIU Ouang-Bin 《结构化学》2011,30(12):1770-1774
The title complex [Na(H2MIA-)(H2O)](1,H3MIA = 2-methyl-1H-imidazole-4,5-dicarboxylic acid) has been synthesized by hydrothermal synthesis and structurally characterized by X-ray crystallography.Compound 1 crystallizes in orthorhombic,space group ibam with a = 14.4737(19),b = 17.553(2),c = 6.5285(9),V = 1658.6(4) 3,C6H7N2NaO5,Mr = 210.12,Z = 8,Dc = 1.675 g/cm3,F(000) = 864,μ = 0.188 mm-1,λ(MoKα) = 0.071073 ,R = 0.0383 and wR = 0.0987 for 1046 observed reflections(I > 2σ(I)).In the structure of 1,each coordination water coordinates with two Na(I) ions at the same time and links the neighboring Na(I) ions to form a one-dimensional Na(I)-water chain.Each H2MIA-ligand links the neighboring Na(I) of Na(I)-water chain to form a novel two-dimensional supramolecular network.The 2-D network is stabilized by O-H…N hydrogen bonds and π-π interaction.The 2D network is further linked via O-H…O hydrogen bonds to yield a three-dimensional framework. 相似文献
20.
《Journal of Coordination Chemistry》2012,65(17):1903-1912
Two new 3D coordination polymers, [Tl2(μ10-CSB)] n (1) [CSB?=?4-[(4-carboxyphenyl)sulfonyl]-1-benzenecarboxylate] and [Tl2(μ9-ADC)] n (2) [ADC?=?acetylendicarboxylate], have been synthesized and characterized by elemental analysis, and IR spectroscopy. Thermal behavior and structures of 1 and 2 have been studied. Single-crystal X-ray data of 1 show that the thallium atoms have an irregular coordination sphere containing a stereochemically active lone pair with TlO5 environment. The single-crystal X-ray data of 2 showed that there are two different Tl environments. One Tl is six-coordinate with a weak Tl?···?Tl interaction with a distance of 3.904?Å. The other type of Tl in the TlO5C2Tl units is eight-coordinate with one weak Tl?···?Tl and two short Tl?···?C interactions. 相似文献