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1.
采用芳香族π共轭及含氮原子有机连接剂,合成同构铽、铕发光配位聚合物(CPs){[Eu(PLIA)1.5(H2O)2]·H2O}n (1)和{[Tb(PLIA)1.5(H2O)2]·H2O}n (2),其中H2PLIA=5-((吡啶-4-基甲基)氧基)苯-1,3-二甲酸。对合成的配合物进行了结构测定、表征和荧光痕量识别实验研究。2个同构配合物具有理想的三维框架结构,π…π堆积及氢键等弱相互作用增强了其化学稳定性;表征显示配位聚合物1和2具有良好的荧光性质、结晶性、热力学稳定性及结构完整性,可作为荧光传感的材料。1和2对水溶液中的Zr4+、Cr2O72-和Fe3+、HPO42-具有选择性好、灵敏度高的荧光识别能力,其检出限分别为0.139 μmol·L-1(1,Zr4+)、0.626 μmol·L-1(1,Cr2O72-)、0.430 μmol·L-1(2,Fe3+)、1.36 μmol·L-1(2,HPO42-)。探究了1和2作为探针的荧光猝灭机理。更有趣的是,1和2具有指纹识别性能,其荧光指纹纹路清晰连贯,细节明显,可被清晰观察。 相似文献
2.
采用溶剂热法,以含氮四羧酸3,5-二(3'',5''-二羧苯)-1H-1,2,4-三唑(H4BDT)为配体,成功合成了4种同构镧系金属有机框架(Ln-MOFs):{[La3(BDT)2(HCOO)(H2O)5]·0.5H2O·3DMF}n(1)、{[Ce3(BDT)2(HCOO)(H2O)5]·3DMF}n(2)、{[Pr3(BDT)2(HCOO)(H2O)5]·3DMF}n(3)和{[Nd3(BDT)2(HCOO)(H2O)5]·3DMF}n(4),并采用单晶X射线衍射、粉末X射线衍射、元素分析、热重、傅里叶换红外光谱、N2吸附实验和荧光光谱对其进行表征。结果表明,这些Ln-MOFs均为单斜C2/m空间群晶体,是双核为无机建筑单元的三维介孔结构。其中2可选择性荧光检测Fe3+离子和盐酸环丙沙星药物分子,检测限分别为4.59和0.77 μmol·L-1。 相似文献
3.
在溶剂热条件下,成功合成了一种稳定的配位聚合物[Cd2(L)(bpb)(H2O)4]·0.5H4L(1)(H4L=1,1''-乙烷基联苯-3,3'',5,5''-四羧酸,bpb=1,4-二(4-吡啶基)苯)。1在不同的有机溶剂和水中表现出优异的稳定性。1可通过荧光猝灭检测水中的罗红霉素(ROX)和B4O72-,检测限分别为0.21和1.59μmol·L-1。1可成功用于延河水中ROX和B4O72-的测定。此外,分析讨论了其传感机理。 相似文献
4.
在溶剂热条件下,成功合成了一种稳定的配位聚合物[Cd2(L)(bpb)(H2O)4]·0.5H4L (1)(H4L=1,1''-乙烷基联苯-3,3'',5,5''-四羧酸,bpb=1,4-二(4-吡啶基)苯)。1在不同的有机溶剂和水中表现出优异的稳定性。1可通过荧光猝灭检测水中的罗红霉素(ROX)和B4O72-,检测限分别为0.21和1.59 μmol·L-1。1可成功用于延河水中ROX和B4O72-的测定。此外,分析讨论了其传感机理。 相似文献
5.
采用溶剂热法,以含氮四羧酸3,5-二(3′,5′-二羧苯)-1H-1,2,4-三唑(H4BDT)为配体,成功合成了4种同构镧系金属有机框架(Ln-MOFs):{[La3(BDT)2(HCOO)(H2O)5]·0.5H2O·3DMF}n (1)、{[Ce3(BDT)2(HCOO)(H2O)5]·3DMF}n (2)、{[Pr3(BDT)2(HCOO)(H2O)5]·3DMF}n (3)和{[Nd3(BDT)2(HCOO)(H2O)5]·3DMF}n (4),并采用单晶X射线衍射、粉末X射线衍射、元素分析、热重、红外、N2吸附实验和荧光光谱对其进行表征。结果表明,这些Ln-MOFs均为单斜C2/m空间群晶体,是双核为无机建筑单元的三维介孔结构。其中2可选择性荧光检测Fe3+离子和盐酸环丙沙星药物分子,检测限分别为4.59和0.77 μmol·L-1。 相似文献
6.
采用芳香族π共轭及含氮原子有机连接剂,合成同构铽、铕发光配位聚合物(CPs){[Eu (PLIA)1.5(H2O)2]·H2O}n (1)和{[Tb (PLIA)1.5(H2O)2]·H2O}n (2),其中H2PLIA=5-((吡啶-4-基甲基)氧基)苯-1,3-二甲酸。对合成的配合物进行了结构测定、表征和荧光痕量识别实验研究。2个同构配合物具有理想的三维框架结构,π…π堆积及氢键等弱相互作用增强了其化学稳定性;表征显示配位聚合物1和2具有良好的荧光性质、结晶性、热力学稳定性及结构完整性,可作为荧光传感的材料。1和2对水溶液中的Zr4+、Cr2O72-和Fe3+、HPO42-具有选择性好、灵敏度高的荧光识别能力,其检出限分别为0.139 μmol·L-1(1,Zr4+)、0.626 μmol·L-1(1,Cr2O72-)、0.430 μmol·L-1(2,Fe3+)、1.36 μmol·L-1(2,HPO42-)。探究了1和2作为探针的荧光猝灭机理。更有趣的是,1和2具有指纹识别性能,其荧光指纹纹路清晰连贯,细节明显,可被清晰观察。 相似文献
7.
采用溶剂热法合成了一种新型的钴(Ⅱ)基配合物,即{[Co(Hppc)2][Co2(4,4''-bipy)(H2O)4](SO4)2·2H2O}n (1),其中H2ppc=5-(3-吡啶基)-1H-吡唑-3-羧酸,4,4''-bipy=4,4''-联吡啶。配体H2ppc是由吡啶环、吡唑环和羧基共同组成,同时兼具了刚性和柔性。通过单晶X射线衍射对配合物1进行了结构测定。结果显示所合成的配合物1结晶在单斜晶系C2/c空间群,包括2个晶体学独立部分:二维层状[Co(Hppc)2]和一维链状[Co2(4,4''-bipy)(H2O)4]2-,并形成具有{44·62}{4}2拓扑网络结构的共晶化合物。此外,配合物1呈现出良好的电化学发光(ECL)性能以及良好的超级电容器性能。 相似文献
8.
在溶剂热条件下,合成了3个基于V型配体的Zn(Ⅱ)金属有机骨架:{[Zn2(BIDPS)2(OBA)2]·DMA}n(1)、{[Zn (BIDPT)(PA)]·DMF}n(2)和{[Zn (BIDPS)(PA)(H2O)2]·2H2O}n(3)(BIDPS=4,4''-二(1-咪唑基)苯砜,H2OBA=4,4''-二苯醚二甲酸,H2PA=帕莫酸,BIDPT=4,4''-二(1-咪唑基)苯硫醚)。利用X射线单晶衍射、红外光谱、元素分析、热重分析、X射线粉末衍射对其结构进行了表征。配合物1具有二重穿插的三维cds拓扑网络结构。配合物2为二维(4,4)层状结构,层与层之间通过互锁形成2D→3D的三维金属有机骨架。配合物3具有一维链状结构,一维链通过分子内和分子间氢键连接,形成三维超分子结构。荧光研究表明,配合物1~3可以在pH=4~10的水溶液中稳定存在,且在水中具有较强的发光性能,可作为检测2,4,6-三硝基苯酚和Fe3+的发光传感器,具有较高的灵敏度和选择性。 相似文献
9.
在溶剂热条件下,合成了3个基于V型配体的Zn(Ⅱ)金属有机骨架:{[Zn2(BIDPS)2(OBA)2]·DMA}n(1)、{[Zn(BIDPT)(PA)]·DMF}n(2)和{[Zn(BIDPS)(PA)(H2O)2]·2H2O}n(3)(BIDPS=4,4''-二(1-咪唑基)苯砜,H2OBA=4,4''-二苯醚二甲酸,H2PA=帕莫酸,BIDPT=4,4''-二(1-咪唑基)苯硫醚)。利用X射线单晶衍射、红外光谱、元素分析、热重分析、X射线粉末衍射对其结构进行了表征。配合物1具有二重穿插的三维cds拓扑网络结构。配合物2为二维(4,4)层状结构,层与层之间通过互锁形成2D→3D的三维金属有机骨架。配合物3具有一维链状结构,一维链通过分子内和分子间氢键连接,形成三维超分子结构。荧光研究表明,配合物1~3可以在pH=4~10的水溶液中稳定存在,且在水中具有较强的发光性能,可作为检测2,4,6-三硝基苯酚和Fe3+的发光传感器,具有较高的灵敏度和选择性。 相似文献
10.
利用六亚甲基四胺分别与苯氧乙酸、Cu(NO3)2·3H2O及2,4-二氯苯氧乙酸、Zn(NO3)2·6H2O反应,得到了2个新的一维配位聚合物,{[Cu2(pa)4](μ2-hmt)}n(1)和{{{[Zn3(dcpa)4(OH)]2(μ2-dcpa)2}(μ2-hmt)}·5H2O}n(2)(Hpa=苯氧乙酸,Hdcpa=2,4-二氯苯氧乙酸,hmt=六亚甲基四胺)。2个配合物均用元素分析、红外光谱、X射线单晶衍射及差热分析进行了表征。晶体结构分析表明,在配合物1中,4个苯氧乙酸根桥联2个Cu2+形成[Cu2(COO)4]双核结构,相邻的[Cu2(COO)4]双核单元由六亚甲基四胺桥联成一维的"zigzag"链;在配合物2中,6个2,4-二氯苯氧乙酸根和2个OH-桥联6个Zn2+形成六核{[Zn3(dcpa)4(μ3-OH)]2(μ2-dcpa)2}结构单元,然后相邻的六核单元由2个六亚甲基四胺桥联成一维双链结构。 相似文献
11.
A series of new oxo-vanadium(IV) complexes, [VOCl0.69(OH)0.31 (2,2′-bipy)2]Cl·2H2O (1, 2,2′-bipy?=?2,2′-bipyridine) [(VO)2Cl4(4,4'-bipy)3 (H2O)2] (2, 4,4'-bipy?=?4,4'-bipyridine), [VO(ida)(H2O)]n (3, H2ida?=?iminodiacetic acid), and [(VO)2(oa)4]n·4n(H3O)·n(H2O) (4, H2oa?=?oxalic acid), have been synthesized and structurally characterized. 1 contains a [VOCl0.69(OH)0.31(2,2′-bipy)2]+ cation, Cl – anion and two free H2O molecules. 2 exhibits a binuclear centrosymmetric moiety built up from two [VOCl2(4,4'-bipy)(H2O)] units and one bridging 4,4'-bipy ligand, which provides a rare example of a 4,4'-bipy molecule acting as monodentate ligand. 3 displays a neutral chain [VO(ida)(H2O)]n constructed by the linkages of [VO(H2O)]2+ units and ida2? bridging ligands, while 4 offers the only example of three kinds of oa2- ligands coexisting within the same anionic chain [(VO)2(oa)44-]n. Their spectroscopic properties were investigated, and the magnetic susceptibility of 4 shows antiferromagnetic behavior. 相似文献
12.
《Journal of Coordination Chemistry》2012,65(13):2301-2311
Three 3-D coordination polymers, [Cu(cca)(4,4′-bipy)]n (1), [Co3(pda)3(1,10′-phen)2]n (2), and [Co(pda)(1,10′-phen)]n (3), have been synthesized from 4-carboxycinnamic acid (cca), 1,4′-phenylenediacrylic acid (pda), 4,4′-bipyridine (4,4′-bipy), 1,10′-phenanthroline (1,10′-phen), and Cu and Co salts under different conditions. The X-ray crystal structures of these three complexes are presented. Complex 1 exhibits a threefold 3-D α-Po interpenetration network. Complex 2 with a 3-D framework with six-connected single α-Po framework constructed from Co3 unit has been synthesized and characterized. Complex 3 shows a 3-D framework with bcu topology composed of 1-D rod-shaped secondary building units. Furthermore, the photocatalytic properties of 2 were studied. When excited by UV light, 2 exhibits photocatalytic activity, in 300?min, about 71% Rhodamine B decomposes. 相似文献
13.
Chun-Feng Yan Fei-Long Jiang Lian Chen Rui Feng Ming Yang Mao-Chun Hong 《Journal of solid state chemistry》2009,182(11):3162-3170
Assembly of 5-sulfosalicylic acid (H3L) and d10 transition metal ions (CdII, AgI) with the neutral N-donor ligands produces five new complexes: [Cd2(HL)2(4,4′-bipy)3]n·2nH2O (1), {[Cd2(μ2-HCO2)2(4,4′-bipy)2(H2O)4][Cd(HL)2(4,4′-bipy)(H2O)2]}n (2), {[Cd(4,4′-bipy)(H2O)4][HL]·H2O}n (3), [Cd(HL)(dpp)2(H2O)]n·4nH2O (4), {[Ag(4,4′-bipy)][Hhbs]}n (5) (4,4′-bipy=4,4′-bipyridine, dpp=1,3-di(pyridin-4-yl)propane, H2hbs=4-hydroxybenzenesulfonic acid, the decarboxylation product of H3L). Complex 1 adopts a 5-connected 3D bilayer topology. Complex 2 has the herring-bone and ladder chain, which are extended to a 3D network via hydrogen bonding. In 3–4 complexes, 3 is a 3D supermolecular structure formed by polymeric chains and 2D network of HL2−, while 4 gives the double-stranded chains. In 5, ladder arrays are stacked with the 2D networks of Hhbs− anions in an –ABAB– sequence. Complexes 1–4 display green luminescences in solid state at room temperature, while emission spectra of 3 and 4 show obvious blue-shifts at low temperature. 相似文献
14.
Lei Guan Yaxu Chen Zhan Shi 《Phosphorus, sulfur, and silicon and the related elements》2013,188(12):1126-1133
AbstractHydrothermal reaction of Zn(NO3)2 · 6?H2O with 2-carboxyethyl(phenyl)phosphinate (H2L) and 4,4'-bipyridine (4,4′-bipy) led to a novel zinc(II) carboxyphosphinate [ZnL(4,4′-bipy)0.5]n (1). The zinc ion is tetrahedrally coordinated by two phosphinate oxygen atoms, one carboxylate oxygen atom, and one nitrogen atom of 4,4′-bipy ligand. The L2- ligand and zinc ion can be seen as three- and four-connected nodes, respectively. Compound 1 shows a layered network with (3,4)-connected topology. It exhibits a broad blue fluorescent emission band at 459?nm, which can be attributed to 4,4′-bipy intraligand emission as well as to H2L emission. It is a diamagnetic system between 300?K and 11?K. 相似文献
15.
《Journal of Coordination Chemistry》2012,65(15):2692-2704
Four new compounds, [Mn(HL)(phen)2(H2O)] (1), [Ni(HL)(phen)2(H2O)] (2), [Zn(HL)(4,4′-bipy)1.5(H2O)] n ?·?2nH2O (3) and [Zn2(HL)2(H2O)6] (4), have been synthesized from an asymmetric semi-rigid V-shaped multicarboxylate 4-(4-carboxy-phenoxy)-phthalic acid (H3L) with 1,10-phenanthroline (phen), or 4,4′-bipyridine (4,4′-bipy) as auxiliary ligands. Single-crystal X-ray diffraction analysis reveals that 1, 2 and 4 have 0-D structures with 3-D supramolecular frameworks formed by intermolecular hydrogen bonds. Compound 3 shows a 1-D infinite ribbon bridged by 4,4′-bipy, which further forms a 3-D supramolecular architecture by π–π stacking interactions and hydrogen bonds. Thermal stabilities of 1–4 and luminescence properties of 3 and 4 have also been investigated. 相似文献
16.
《Journal of Coordination Chemistry》2012,65(8):1304-1312
Three new metal coordination polymers, [Mn(Hdpa)2(4,4′-bipy)2] n (1), [Mn(dpa)(1,10-phen)(H2O)] n (2), and [Mn(dpa)(2,2′-bipy)] n (3) (H2dpa = 2,4′-biphenyl-dicarboxylic acid, 4,4′-bipy = 4,4′-bipyridine, 1,10-phen = 1,10-phenanthroline, and 2,2′-bipy = 2,2′-bipyridine), have been synthesized and characterized by elemental analysis, IR, and X-ray diffraction. Single-crystal X-ray analyses reveal that 2,4′-diphenic acid is a bridging ligand, exhibiting three coordination modes to link metal ions: μ 1-η 1: η 1/μ 0-η 0: η 0; μ 2-η 2: η 0/μ 1-η 1: η 0; and μ 2-η 1: η 1/μ 2-η 1: η 1. Intermolecular hydrogen bonds in 1 lead to a zigzag chain. In 2, the 2-D supramolecular arrays extended along b-axis through π–π interactions between 1,10-phen. The dinuclear paddle-wheel second building units (SBUs) constructed by four dpa2? ligands in 3 are linked by dpa2? into double-strand chains. The fluorescence of H2dpa and 1–3 are also determined. 相似文献
17.
《Journal of Coordination Chemistry》2012,65(5):752-765
Three inorganic–organic hybrid materials based on Keggin-type polyoxometalates (POMs), [CuII2(phen)2(4,4′-bipy)(H4,4′-bipy)2(H2O)2][PMo12O40]2·2H2O (1), [CuII(phen)2(H4,4′bipy)][PW12O40]·H2O (2), and [CuII2(phen)2(4,4′-bipy)(BW12O40)(H2O)2](H24,4′-bipy)0.5·3H2O (3) (phen = 1,10-phenanthroline, 4,4′-bipy = 4,4′-bipyridine), were synthesized using different POMs in the hydrothermal conditions. Compounds 1–3 were characterized by single-crystal X-ray diffraction, IR spectra, elemental analyses, powder X-ray diffraction analyses, and thermogravimetric analyses. Compound 1 presents a two-dimensional (2-D) network containing the Keggin-type [PMo12O40]3? anion and dinuclear metal–organic units [CuII2(phen)2(4,4′-bipy)(H4,4′-bipy)2(H2O)2]3+. Compound 2 is a 2-D architecture constructed from a [PW12O40]3? and mononuclear metal–organic units [CuII(phen)2(H4,4′-bipy)]3+. In 3, the [BW12O40]5? anions link [CuII2(phen)2(4,4′-bipy)] units to form a one-dimensional (1-D) chain [CuII2(phen)2(4,4′-bipy)(BW12O40)(H2O)2]; the 1-D chain connects with protonated 4,4′-bipy ligands and lattice waters, yielding a 2-D layer. Fluorescence spectra, UV–vis spectra, and electrochemical properties of 1–3 have been investigated. 相似文献
18.
将过渡金属配合物阳离子([M(DETA)2]n+(M=Cu2+,Ni2+,Co3+;DETA=Diethylenetriamine,二乙烯三胺)作为客体插入层状MnPS3层间得到了相应的3个夹层化合物。通过X-射线粉末衍射、元素分析和红外光谱对夹层化合物的结构进行了表征。结果表明,与主体MnPS3 0.65 nm的层间距相比较,夹层化合物(Mn0.88PS3[Cu(DETA)2]0.12)的层间距扩大了0.32 nm,由此推测客体[Cu(DETA)2]2+在层间以平面四方的配位形式存在,而另2个夹层化合物(Mn0.79PS3[Ni(DETA)2]0.21和Mn0.74PS3[Co(DETA)2]0.17)的层间距扩大了0.48 nm,说明客体[(M(DETA)2]n+,M=Co3+,Ni2+) 在主体层间以八面体配位形式存在。磁性测试结果表明过渡金属离子[(M(DETA)2]n+(M=Cu2+,Co3+)的插入能引起主体MnPS3的磁性在35~40 K发生由顺磁向亚铁磁性的转变并表现自发磁化,而客体[Ni(DETA)2]2+却使夹层化合物的反铁磁相互作用增强,抑制了自发磁化的发生。 相似文献
19.
《Journal of Coordination Chemistry》2012,65(20):3651-3666
Five metal imidazole dicarboxylate-based compounds, {[Zn3(MIDC)2(4,4′-bipy)3](4,4′-bipy)·8H2O}n (1), {[Co3(MIDC)2(4,4′-bipy)3](4,4′-bipy)·6H2O}n (2), {[Co3(MIDC)2(py)2(H2O)2]}n (3), {[Mn6(MIDC)4(py)5(H2O)4]}n (4), and {[Mn3(MIDC)2(Phen)3(H2O)2]}n (5) (H3MIDC = 2-methyl-1H-imidazole-4,5-dicarboxylic acid; 4,4′-bipy = 4,4′-bipyridine; py = pyridine; Phen = 1,10-phenanthroline), have been synthesized under hydrothermal conditions and characterized by elemental analyses, IR spectroscopy, thermogravimetric analysis, and single-crystal X-ray diffraction. We control the coordination modes of H3MIDC via hydrazine and obtained a series of coordination compounds containing honeycomb-like [M3(MIDC)2]n layers. We also investigated the effects of different neutral terminal or bridging ligands on [M3(MIDC)2]n layers. Coplanar [M3(MIDC)2]n layers and 4,4-bipy were used to construct 3-D frameworks of 1 and 2. Puckered [M3(MIDC)2]n layers were found in 3–5; 4 is the first [M3(L)2]n layer structure with two crests and troughs during each period (L = imidazole-4,5-dicarboxylic acid or its analog). Compound 5 is the first puckered [M3(L)2]n layer structure decorated by chelating neutral ligands. Compound 1 exhibits weak blue photoluminescence in the solid state at room temperature. Variable-temperature magnetic susceptibility measurements of 2–5 indicate strong antiferromagnetic interactions. 相似文献
20.
《Journal of Coordination Chemistry》2012,65(18):3199-3210
By hydrothermal reactions of a newly designed ligand, 2-(p-tert-butylphenyl)-1H-imidazole-4,5-dicarboxylic acid (H3BuPhIDC) with Cd(II) or Zn(II), three metal-organic frameworks, [Cd(μ3-HBuPhIDC)(H2O)]·2H2O (1), [Cd(μ3-HBuPhIDC)(4,4′-bipy)0.5] (4,4′-bipy = 4,4′-bipyridine) (2), and [Zn2(μ3-HBuPhIDC)2(CH3OH)2] (3), have been obtained and characterized by elemental analyses, IR spectroscopy, and single-crystal X-ray diffraction. In 1, small countless diamond grids form a mesh structure and then are bridged through μ3-HBuPhIDC2? linkers building a 3-D framework. Compared with 1, 4,4′-bipy participates in the construction of a 3-D structure of 2. Polymer 3 shows an interesting 3-D open architecture, which contains infinite 1-D octagonal channels built by left- and right-handed helical chains. Thermal and solid-state photoluminescence properties of the polymers have been investigated. 相似文献