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1.
通过水热方法获得了2个镍配合物:[Ni(3,3′-dpdc)(dpp)]n(1),[Ni(2,2′-dpdc)(phen)(H2O)2]n(2)(3,3′-H2dpdc=3,3′-联苯二甲酸,2,2′-H2dpdc=2,2′-联苯二甲酸、phen=菲咯啉,dpp=1,3-二(4-吡啶基)丙烷),通过X射线单晶衍射的方法测定了其晶体结构。配合物1为二维网格型结构,中心金属离子为扭曲的[NiO4N2]八面体构型,3,3′-dpdc配体的2个羧基采取双齿螯合的配位模式与Ni髤离子配位形成Ni-(3,3′-dpdc)一维链结构,dpp配体采取单氮原子桥连的配位模式连接2个Ni髤离子形成Ni-dpp一维链,两种链相互贯穿形成二维网格型结构,二维网格结构之间通过氢键C15D-H15…O2、C21-H21A…O1形成三维超分子结构。配合物2为一维之字链结构,中心金属离子为扭曲的[NiO_4N_2]八面体构型,2,2′-dpdc的2个羧基均采取单齿桥连配位模式连接2个Ni髤离子形成一维之字型链结构,一维链之间通过O-H…O和C-H…π弱作用力连接形成三维超分子结构。探究了2种配合物对有机染料罗丹明B的光催化降解性能,结果表明配合物可以高效地降解罗丹明B。 相似文献
2.
以三苯甲烷-4,4′,4″-三羧酸(H_3TCOPM)为主配体,以含氮二齿配体4,4′-bipyridine(4,4′-bipy)为辅助配体,与Co(NO_3)_2·6H_2O通过溶剂热反应得到了2个配位聚合物{[Co_2(α-OH-TCOPM)(OH)(H_2O)_4]·DMF}_n(1)(α-OH-H_3TCOPM=三苯甲醇-4,4′,4″-三羧酸)和{[Co_3(α-OH-TCOPM)_2(4,4′-bipy)_3(H_2O)_6]·2H_2O}_n(2)。晶体结构分析表明,配合物1为四边形的二维层状结构,而配合物2为二维网状结构。采用红外光谱、粉末X射线衍射对配合物进行了表征,用热重分析仪研究了其热稳定性。 相似文献
3.
《无机化学学报》2016,(10)
通过设计柔性配体1,5-二(2-乙基苯并咪唑基)戊烷(bep),在二羧酸辅助配体的调控下成功制备了3个配位聚合物[Cd(bep)(sba)]_n(1),[Cd(bep)(bda)]_n(2),and{[Cd_2(bep)(ada)_2]·H_2O}_n(3)(H_2sba=4,4′-磺酰基二苯甲酸,H_2bda=4,4′-联苯二甲酸,H_2ada=1,3-金刚烷二乙酸)。配合物均呈现二维层状结构。配合物1由交替的Cd(Ⅱ)/bep/sba2-螺旋链构成。配合物2由Cd/bda2-单元构成二维结构,bep作为单齿配体与Cd(Ⅱ)配位。配合物3的二维层通过Cd/ada2-/H_2O氢键螺旋链拓展成三维超分子。此外,对配合物1~3的粉末X射线衍射、热稳定性以及荧光性质进行了研究。 相似文献
4.
以1,3-二(4-吡啶基)-丙烷(bpp)和邻苯二甲酸(1,2-H2bdc)为配体,通过水热法合成了过渡金属配合物M2(1,2-bdc)2(bpp)2·2H2O[M=Co(1),Ni(2)]和Cd(1,2-bdc)(bpp)·H2O(3).配合物1和2属单斜晶系P21空间群,具有相似的三维骨架结构.配合物中存在2种配位环境相似的金属中心,每个金属中心采取六配位的畸变八面体构型,与来自2个1,2-bdc配体的3个氧原子和2个bpp配体的2个氮原子以及1个水分子配位.1,2-bdc配体采取单齿/双齿螯合的配位模式将金属离子连接成M1-(1,2-bdc)-M2右手螺旋链.bpp配体采取Trans-Gauche(TG)构型,连接相邻的金属离子形成M1-(bpp)-M1链和M2-(bpp)-M2链.这3种链交织在一起构筑成具有{65.8}拓扑的三维结构.配合物3属单斜晶系P21/c空间群,具有单节点的双层二维结构.Cd(Ⅱ)离子采取七配位的畸变五角双锥体构型,与来自2个1,2-bdc配体的4个氧原子,2个bpp配体的2个氮原子和1个水分子配位.1,2-bdc配体采取双齿螯合/双齿螯合的配位模式将Cd(Ⅱ)离子连接成Cd-(1,2-bdc)-Cd链.bpp配体采取TG构型,连接相邻的Cd(Ⅱ)离子,形成Cd-(bpp)-Cd链.这2种链通过共享Cd(Ⅱ)离子交错排列构筑成二维结构.配合物3显示出强的荧光,最大发射位于408 nm处,对应于配体的π*-π跃迁.不同有机小分子对配合物3的荧光强度有不同程度的影响,苯胺对其有显著的猝灭作用,基于荧光猝灭机理,配合物3可用于选择性检测苯胺分子. 相似文献
5.
合成了两个新型配位聚合物[Cu_2(OH)(H_2O)(L)_3(bpp)]_n(1),[Zn(L)_2(H_2O)(bipy)]_n(2)(HL=C_4H_4N_2O_2S,4-甲基-1,2,3-噻二唑-5-甲酸; bpp=1,3-双(4-吡啶基)-丙烷; bipy=4,4’-联吡啶),用元素分析、红外光谱、热重分析和单晶X-射线衍射对产物进行了表征和结构测定.配合物1是双核结构,中心金属离子Cu~(2+)的配位数均为五,构成略为变形的三角双锥体;配合物2的中心金属离子Zn~(2+)的配位构型是扭曲的三角双锥结构.配合物1通过氢键形成了二维结构,配合物2通过分子间氢键和π-π堆积作用形成了三维结构.用荧光光谱法研究了配体和配合物与DNA之间的相互作用. 相似文献
6.
《高等学校化学学报》2018,(11)
选用2-(3'-羧基苯氧基)苯甲酸(2,3'-H2oba)、1,3-双(4-吡啶基)-丙烷(DPP)和1,4-二(1,2,4-三氮唑-1-)丁烷(BTB)为配体,采用水热法得到了过渡金属配合物Cd (2,3'-oba)(DPP)(1)和Zn(2,3'-oba)(BTB)0. 5(2).配合物1为二维网状结构,中心Cd~(2+)的配位环境为{Cd O4N2},双齿螯合配位的2,3'-oba和单齿桥联配位的DPP将Cd~(2+)连接成Cd~(2+)-2,3'-oba-Cd~(2+)-DPP两条螺旋链.配合物1由分子间氢键连接并自组装为三维超分子结构.配合物2为三维框架结构,中心Zn~(2+)采取五配位的畸变四方锥构型{Zn O4N}. 2,3'-oba配体以双齿螯合与双齿桥联的配位方式连接相邻Zn~(2+)并形成二维网层,BTB分子桥联Zn~(2+)并连接相邻网层进而形成三维结构.荧光光谱表明配合物1和2分别在437和359 nm存在最大发射,均来源于配体的π*-π跃迁.广谱型农药甲基磺草酮对配合物2的荧光强度具有明显的猝灭作用,据此配合物2可作为荧光探针检测甲基磺草酮. 相似文献
7.
水热法合成了配合物{[Ln(Hbmdc)(bmdc)(H2O)3].3H2O}n(Ln=Eu,1;Dy,2;H2bmdc=苯并咪唑-5,6-二羧酸),用X-射线单晶衍射分析确定了配合物的晶体结构。配合物为单斜晶系,P21/c空间群。配合物1和2具有相似的一维链状结构。配体H2bmdc以2种不同的类型与Ln3+离子配位:完全去质子化的bmdc配体和咪唑环上的氮原子被质子化的Hbmdc配体。bmdc配体的2个羧基采取双齿螯合/双齿螯合方式配位;Hbmdc配体的1个羧基采取双齿螯合方式配位,另1个羧基未参与配位。每个Ln3+离子与6个羧基氧原子和3个水分子中氧原子配位,形成9配位的扭曲单帽四方反棱柱体。相邻的Ln3+离子通过bmdc配体桥联形成螺旋链状结构。链和链之间通过π-π堆积和氢键进一步连接成三维超分子结构。配合物1和2分别显示Eu3+和Dy3+离子的特征荧光。 相似文献
8.
以2-(4′-羧基苯基)咪唑-4,5-二羧酸(H_4CPhIDC,C_(12)H_8N_2O_6)为配体,用溶剂热合成了3种配位聚合物{[Cd2(CPhIDC)(bimb)]·H_2O}_n(1)、{[Cd_2(CPhIDC)(phen)_2]·3H_2O}_n(2)、{[Zn_2(CPhIDC)(bpp)]·1.5H_2O}_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μ_4和μ_5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
9.
两个二维层状4-双(咪唑基-1-甲基)-苯钴和镍配位聚合物的合成与表征 总被引:1,自引:1,他引:0
以1,4-双(咪唑基-1-甲基)-苯(bix)为配体,间苯二甲酸(IPA)为辅助配体,合成制备了两种新型同构配位聚合物:{[Ni(bix)(IPA)(H_2O)]}_n(1)和{[Co(bix)(IPA)(H_2O)]}_n(2)。单晶结构表明,此两个配合物均形成二维层状空间结构,金属原子均为六配位八面体结构,赤道平面上四个配位原子来自间苯二甲酸和配位水分子,轴向两个配位原子为bix配体的咪唑环上的N原子。金属原子通过配体连接形成四连接的二维4(4).6(2)方格层状结构。 相似文献
10.
合成并通过单晶衍射、元素分析及红外光谱表征了配合物[Ag_2(HL)(NO_3)_2]_n(1)的结构(HL为3-乙基-2-乙酰吡嗪缩4-苯基氨基脲)。单晶衍射结果表明,配合物1中,HL作为中性四齿配体连接2个Ag(Ⅰ)中心,其中一个Ag(Ⅰ)中心与HL配体中的ON_2供体(羰基O,亚胺N和吡嗪N1原子)和2个单齿硝酸根配位,构成扭曲的四方锥配位构型;而另一个Ag(Ⅰ)离子与1个单齿硝酸根,1个双齿硝酸根和HL配体中的吡嗪N_4原子配位,形成扭曲平面正方形配位构型。另外,相邻的Ag(Ⅰ)离子通过桥联的硝酸根离子相互连接形成二维层状结构;此外,配合物1与DNA的相互作用强于配体。 相似文献
11.
以1,1′-二羟基-5,5′-联四唑(H_2BTO)为配体,镧系金属离子作为金属中心,采用溶剂热法制备了5种金属配合物:[La_2(BTO)_3(H_2O)_8]·2H_2O (1)、[Ce_2(BTO)_3(H_2O)_8]·2H_2O (2)、[Pr_2(BTO)_3(H_2O)_8]·2H_2O (3)、[Sm_2(BTO)_3(H_2O)_8]·2H_2O (4)和[Nd_2(BTO)_3(DMF)_4]·6H_2O (5)。通过单晶X射线衍射和元素分析对5种配合物的结构进行了表征。结果表明,5种配合物均属于单斜晶系,P2_1/n空间群。利用差示扫描量热法研究了配合物1~4的热稳定性,采用Kissinger法和Ozawa法分别计算了其热分解动力学参数。 相似文献
12.
以3,5-二(苯并咪唑基)吡啶(L)、间苯二甲酸(m-H2BDC)、4-羧基肉桂酸(H2CCA)、ZnSO4·7H2O和Cd(NO3)2·4H2O为原料,使用溶剂热方法合成了两个配位聚合物[Zn(L)(m-BDC)](1)和[Cd(L)(CCA)]·2H2O(2),利用红外、元素分析、热重分析和X-射线粉末衍射对其进行了表征,利用X-射线单晶衍射对结构进行了测定,并研究了配合物的荧光性质。在配合物1中,L与金属离子连接形成了一维(1D)链结构,而间苯二甲酸根离子与金属离子构成了一个M2(m-BDC)2(M=金属离子)的单元。一维链之间通过M2(m-BDC)2单元连接形成二维网状(2D)结构。在配合物2中,和配合物1类似,L与金属离子连接形成一维链,但与1不同的是羧酸配体与金属离子配位也构成了一维链结构,两种一维链通过配位作用连接构成二维结构。 相似文献
13.
以3,5-二(苯并咪唑基)吡啶(L)、间苯二甲酸(m-H2BDC)、4-羧基肉桂酸(H2CCA)、ZnSO4·7H2O和Cd(NO3)2·4H2O为原料,使用溶剂热方法合成了两个配位聚合物[Zn(L)(m-BDC)] (1)和[Cd(L)(CCA)]·2H2O (2),利用红外、元素分析、热重分析和X-射线粉末衍射对其进行了表征,利用X-射线单晶衍射对结构进行了测定,并研究了配合物的荧光性质。在配合物1中,L与金属离子连接形成了一维(1D)链结构,而间苯二甲根离子与金属离子构成了一个M2(m-BDC)2(M=金属离子)的单元。一维链之间通过M2(m-BDC)2单元连接形成二维网状(2D)结构。在配合物2中,和配合物1类似,L与金属离子连接形成一维链,但与1不同的是羧酸配体与金属离子配位也构成了一维链结构,两种一维链通过配位作用连接构成二维结构。 相似文献
14.
Ningning Zhao Kang Wang Wenjun Li Yongzhong Bian Changyan Sun Zhidong Chang Hongxia Fan 《Solid State Sciences》2011,13(11):1948-1953
A series of transition metal coordination polymers [Co(H3L)2(4,4′- bpy)(H2O)2]n?n(4,4′-bpy) (1), [Ni(H2L)(4,4′-bpy)(H2O)2]n (2), [Co2(L)(phen)2(H2O)4]n?(H2O)2n (3), and [Ni2(L)(phen)2(H2O)4]n?(H2O)2n (4) have been assembled from a semirigid multicarboxylate ligand 3,3′-(1,4-phenylenebis(oxy))diphthalic acid (H4L) with the help of 4,4′-bipyridine (4,4′-bpy) ligand or 1,10-phenanthroline (phen) ligand. X-ray single crystal diffraction analysis reveals that complex 1 crystallizes in the space group of P − 1 and displays a one-dimensional (1D) chain structure constructed from 4,4′-bpy ligand and H3L ligand, which was further interlinked to form a three-dimensional network via hydrogen bonds. In complex 2, Ni(II) atoms are coordinated by L ligand in monodentate fashion to form alternate left- and right-helices, which are further bridged together by the coordination interactions between Ni(II) atoms and 4,4′-bpy, leading to a 2-fold (4, 4)-connected interpenetrating network. Isostructural complexes 3 and 4 belong to the space group P − 1 and display a 1D chain structure constructed from phen and L ligands, which was further interlinked to form a 2D plane via π–π interactions. In addition, their thermal and luminescent properties were also investigated. 相似文献
15.
Debasish Das Amsaveni Muruganantham Mukesh Kumar M. K. Sureshkumar 《Journal of Coordination Chemistry》2017,70(9):1548-1553
The separation of different metal ions can be successfully accomplished by using picolinamide-based ligands. We herein report the first X-ray structure of picolinamide-based ligands of the type C5H4NCONR2 (where R=iC3H7 (L1) and iC4H9 (L2)) and C5H4NCONHR (R=tC4H9 (L3)) with palladium(II) ion. We have synthesized and characterized the structures of two palladium complexes, [PdCl2(L1)2] (1) and [PdCl2L3] (3). In 1, ligand L1 forms a 2?:?1 complex with palladium(II) chloride, whereas in 3, the ligand L3 forms a 1?:?1 complex. Further, in 1, the ligand L1 acts as a monodentate ligand and is bound only through pyridyl-N atom, whereas in 3, the ligand L3 acts as a bidentate chelating ligand and is bound through both the pyridyl-N and amido-O atoms to the Pd(II) center. Electronic structure calculations are carried out to understand the experimental coordination diversity in the Pd complexes. Our calculations clearly suggest that a combination of steric hindrance of the ligand and the electronic effect of metal ions may modulate the coordination preferences. 相似文献
16.
《Journal of Coordination Chemistry》2012,65(10):1664-1675
Three coordination polymers, {[Co(C10H5N3O5)(H2O)2]·H2O}n (1), {[Mn3(C10H5N3O5)2Cl2(H2O)6]·2H2O}n (2), and {[Cu3(C10H4N3O5)2(H2O)3]·4H2O}n (3), based on a T-shaped tripodal ligand 4-(4,5-dicarboxy-1H-imidazol-2-yl)pyridine 1-oxide (H3DCImPyO), were synthesized under hydrothermal conditions. The polymers showed diverse coordination modes, being characterized by elemental analysis, infrared spectroscopy, and single-crystal X-ray structure analysis. In 1, the HDCImPyO2? generated a 1-D chain by adopting a μ2-kN, O : kN′, O′ coordination mode to bridge two Co(II) ions in two bis-N,O-chelating modes. In 2, the HDCImPyO2? adopted a μ3-kN, O : kO′, O′′ : O′′′ coordination mode to bridge two crystallographically independent Mn(II) ions, forming a 2-D hcb network with {63} topology. In 3, by adopting μ4-kN, O : kO′, O′′ : kN′′, O′′′ : O′′′′ coordination, DCImPyO3? bridged three crystallographically independent Cu(II) ions to form a 3-D framework having the stb topology. 相似文献
17.
《Journal of Coordination Chemistry》2012,65(7):805-815
The novel transition metal saccharinate complexes of triethanolamine (TEA) have been synthesized and characterized by elemental analyses, magnetic moments, UV-Vis and IR spectra. Mn(II), Co(II), Ni(II), Zn(II), Cd(II) and Hg(II) form mononuclear complexes of [M(TEA)2](SAC)2, where SAC is the saccharinate ion, while the Cu(II) complex is dimeric. The TEA ligand acts as a tridentate N,O,O'-donor ligand and one ethanol group is not involved in coordination. The SAC ion does not coordinate to the metal ions and is present as the counter-ion in the Mn(II), Co(II), Ni(II), Zn(II), Cd(II) and Hg(II) complexes, but coordinates to the Cu(II) ion as a monodentate ligand. The crystal structures of the [Co(TEA)2](SAC)2 and [Cu2(μ-TEA)2(SAC)2]·2(CH3OH) complexes were determined by single crystal x-ray diffraction. The Co(II) ion has a distorted octahedral coordination by two TEA ligands. The Cu(II) complex crystallizes as a dimethanol solvate and has doubly alkoxo-bridged centrosymmetric dimeric molecules involving two tridentate triethanolaminate (deprotonated TEA) and two monodentate SAC ligands. The geometry of each Cu(II) ion is a distorted square pyramid. Both crystal structures are stabilized by hydrogen bonds to form a three-dimensional network. 相似文献
18.
Four Metal Complexes Based on Bulky Imidazole Ligands: Solvothermal Syntheses,Crystal Structures,and Fluorescence Properties
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Xue Zhang Sai Li Yue‐Jiao He Tong Han Xiao‐Ling Wang Bang Chen Kang‐Yu Zou Zuo‐Xi Li 《无机化学与普通化学杂志》2015,641(11):1874-1880
In order to explore the influences of (de‐)protonation of the imidazole ring on the structural diversity of the resulting complexes, the imidazole‐based ligands 4, 5‐diphenylimidazole (Hdpi) and 1H‐phenanthro[9, 10‐d]imidazole (Hpi) were utilized as bulky building blocks to construct four complexes by solvothermal reactions, i.e. [Ag(Hdpi)2](NO3) · (H2O) ( 1 ), [Cu(dpi)]∞ ( 2 ), [Cu(Hpi)(NO3)]∞ ( 3 ), and [(H2pi)(NO3)] · H2O ( 4 ). In complex 1 , two Hdpi ligands adopt a monodentate pattern and coordinate with one AgI ion to form a mononuclear unit, which is further connected by hydrogen bonds into a 1D supramolecular helix. The deprotonated dpi ligand of 2 acts in bidentate mode, and bridges CuI ions to afford a 1D chain. In 3 , the NO3– ion, acts as a monodentate bridging ligand and joins CuI ions to generate a 1D chain. The Hpi ligand employs a monodentate mode to bond with CuI ions of the 1D chain. 4 is protonated and two H2pi nitrogen atoms are free of coordination. Interestingly, hydrogen bonds among the NO3– ion, the H2pi ligand, and the water molecule yield a macro ring R44(14). The resulting structural diversity reveals that the (de‐)protonation of imidazole ring directly steers the coordination number of ligand, and thus causes a significant effect on the structure, especially the dimensionality. Furthermore, the solid‐state fluorescence properties of the free ligands and compounds 1 – 4 were studied at room temperature. 相似文献
19.
《Journal of Coordination Chemistry》2012,65(16):1807-1811
The complexes [M(CO)4(η2-H2L)] [M?=?Cr; 1, Mo; 2, W; 3] have been synthesized by photochemical reactions of VIB metal carbonyls [M(CO)6] [M?=?Cr,?Mo,?W] with N,N′-bis(salicylidene)-1,2-bis-(o-aminophenoxy)ethane (H2L) in THF and characterized by elemental analyses, FTIR, 1H?NMR and mass spectra. The H2L ligand is coordinated to the central metal as a bidentate ligand via the central azomethine nitrogen atoms in 1–3. 相似文献
20.
《Journal of Coordination Chemistry》2012,65(17):2703-2714
The ligand N-(2-propionic acid)-salicyloyl hydrazone(H3L, 1) and its new transition metal(II) complexes [NiHL(bipy)H2O] (2), [CdHL(bipy)(H2O)2]2·2H2O (3) and [NiHL(phen)H2O]·H2O (4) (HL is a dianion, bipy?=?2,2′-bipyridine and phen?=?1,10-phenanthroline) were synthesized and characterized on the basis of elemental analyses, IR, 1H NMR, molar conductivity and thermal analysis. Single crystal X-ray diffraction showed that 1 is in keto form and connected by hydrogen bonds to form a two-dimensional supermolecular compound. Complexes 2 and 4 have the same structure with distorted meridional octahedral geometry with 1 as a tridentate ligand with keto-form coordination by azomethine, carboxyl O and acyl O. In 3, ligand 1 bridges two Cd(II) atoms by μ 2-O of carboxyl. H-bonding is an important weak interaction for constructing supermolecular frameworks. There are π–π interactions between bipy or phen rings in 3 or 4, respectively. 相似文献