一系列萘羧酸膦酸镧系配合物的合成、结构和荧光性质

在溶剂热条件下,5-羧酸-1-萘膦酸（5-pncH₃）和稀土硝酸盐反应合成得到3例萘羧酸膦酸镧系配合物：[Pr （5-pnc）（H₂O）]·2H₂O （1）、[Sm （5-pnc）（H₂O）]·H₂O （2）和[Eu （5-pnc）（H₂O）]·H₂O （3）。采用单晶X射线衍射、粉末X射线衍射、元素分析、红外光谱、热重分析和荧光光谱对配合物进行了表征。晶体结构表明,每个七配位的镧系离子由来自5个膦酸盐配体的6个O原子和来自1个配位水分子的一个O原子配位。[LnO₇]通过O—C—O、O—P—O或—O—单元连接成一维双金属链结构,一维双金属链再进一步由萘羧酸膦酸配体（5-pnc^3-）连接成三维开放骨架结构。荧光性质研究表明,配合物3在330 nm的激发光下,发射Eu的红色特征荧光,而配合物1和2在蓝光区显示出非常宽的配体中心发射带。     

稀土二膦酸配合物的合成、结构和荧光性质

合成并表征了3个同构的稀土二膦酸化合物Ln(hpyedpH₂)(hpyedpH₃)·2H₂O [Ln=Gd (1)，Eu (2)，Tb (3)；hpyedpH₄=1-hydroxy -2-(3-pyridyl)ethylidene-1，1-diphosphonic acid，C₇H₁₁NO₇P₂]，测定了化合物1的单晶结构。发现它们具有链状结构，其中Ln通过3个或4个O-P-O基团交替连接，链与链之间存在氢键和π-π堆积作用。探讨了化合物2和3的荧光性质。     

三个二维镧系配合物的结构、荧光和磁性

在溶剂热的条件下,以2,2-双(羟甲基)丙酸(Hdmpa)为配体制备了 3个新的二维镧系配合物[Ln2(dmpa)4]Cl2,其中Ln=Eu(1)、Tb(2)、Dy(3),并通过红外光谱、元素分析、粉末X射线衍射、热重分析和单晶X射线衍射对配合物进行了表征.这3个配合物是同构的,它们的Ln(Ⅲ)离子通过羧基桥联形成了二...     

镉配合物的合成、晶体结构与荧光性质

用水热合成法得到了镉的2个配合物[CdCl(pybma)·H₂O]_n (1)和[Cd₂(pybma)₂(OH-BDC)]_n (2)(Hpybma=2-(2-吡啶基)苯并咪唑基乙酸, OH-H₂BDC=5-羟基-1,3-苯二酸),对它们进行了元素分析、红外光谱、XRD,热重,荧光等表征,并用X-射线单晶衍射测定了配合物的单晶结构。配位聚合物1属单斜晶系,P2₁/c空间群, 配位聚合物2属三斜晶系,P1 空间群。2个配合物都是二维层状结构,其中配合物1通过氢键作用形成三维网状结构。实验结果表明2个配合物都具有较好的荧光性质,可以作为潜在的荧光光学材料。     

两个镧系配合物的合成, 晶体结构及荧光性质

合成了两个新配合物, [Eu2(Pht)2(HPht)2(Phen)2(H2O)4] (1) and [Gd(3-CNC6H4COO)3(H2O)2]n (2) (Pht2―=dianion of o-phthalic acid; HPht―=mono-anion of o-phthalic acid; Phen=1, 10-phenanthroline; 3-CNC6H4COO=3-cyanobenzoate), 并通过X-射线单晶衍射表征其结构。结果表明,在水热反应条件下1,3-苯二腈水解为3-氰基苯甲酸。配合物2形成了一维链状配合物,而配合物1形成了二聚体。配合物1属三斜晶系,空间群 ,晶胞参数为a = 1.01048(6) nm, b = 1.06755(7) nm, c = 1.19266(8) nm, α = 90.188(3)º, β = 99.526(2)º, γ = 100.981(2)º, V = 1.24479(14) nm3, Z = 1, Dc = 1.861 Mg/m3;配合物2也属三斜晶系,空间群 ,晶胞参数为a = 0.93749(9) nm, b = 1.14943(10) nm, c = 1.27024(11) nm, α = 90.188(3)º, β = 73.788(5)º, γ = 86.757(5)º, V = 1.19389(19) nm3, Z = 2, Dc = 1.757 Mg/m3。用激发和发射光谱研究了配合物1的荧光性质,该化合物能发射很强的红色荧光。     

两个单核镍含氮配体配合物的合成、晶体结构及荧光性质

采用回流法在水溶剂中合成了2个含氮配体单核镍配合物[Ni（phen）₂（H₂O）₂]（1,6-nds）·2H₂O（1）和[Ni（phen）₃]（1,6-nds）·10H₂O（2）（1,6-nds=1,6-萘二磺酸根离子,phen=1,10-邻菲罗啉）。配合物1中,镍离子与2个1,10-邻菲罗啉和2个水分子配位,形成[Ni（phen）₂（H₂O）₂]²⁺阳离子。2个没有配位的水分子通过氢键与[Ni（phen）₂（H₂O）₂]²⁺和1,6-萘二磺酸根离子相互连接形成二维层状结构。配合物2中,镍离子与3个1,10-邻菲罗啉配位,形成[Ni（phen）₃]²⁺阳离子。大量的氢键将自由的水分子和1,6-萘二磺酸根离子连接形成三维网状结构。2个配合物中1,6-萘二磺酸根离子均没有与镍离子配位,只是起到平衡电荷的作用。室温下,配合物显示了较大的荧光发射峰,其最大发射峰分别在443和438nm。     

3-甲基吡唑-5-甲酸基Zn(Ⅱ)配合物的合成、晶体结构及荧光性质

A transition metal complex Zn(mpc)₂(H₂O)₂ (Hmpc=3-methylpyrazole-5-carboxylic acid) has been synth-esized by the reaction of Hmpc with Zn(NO₃)₂·6H₂O using hydrothermal method, which was characterized by IR spe-ctra, elemental analysis and single-crystal X-ray structure analysis. The structure reveals that the complex crystallizes in the trigonal space group R3c with the Zn^Ⅱ atom on a threefold axis, composed of one Zn^Ⅱ atom, two independent mpc^- ligands and two coordinated water. Hydrogen bonds link the molecules into a three-dimensional supramolecular architecture. Fluorescent analysis in the dilute EtOH solution shows that the title complex exhibits a broad fluorescent band at 471 nm upon photoexcitation at 280 nm and has a bathochromic shift of the emission energy compared with the free ligand, possibly due to metal-to-ligand charge transfer (MLCT). CCDC: 682402.     

卤代芳香族羧酸与含氮配体合成镧系配合物的结构、热化学和荧光性质（英文）

采用室温溶液挥发法合成了五种结构新颖的镧系配合物,其结构通式为[Ln(2,4-DFBA)₃(phen)]₂ (Ln=Sm 1, Eu2, Er 3, 2,4-DFBA为2,4二氟苯甲酸的简写,phen为1,10-菲啰啉的简写),[Ln(2-Cl-6-FBA)₂(terpy)(NO₃)(H₂O)]₂ (Ln=Tb4, Dy 5, 2-Cl-6-FBA为2-氯-6-氟苯甲酸的简写, terpy为2,2’:6’2’’-三联吡啶的简写)。五个配合物可以分为两个系列,使用不同的镧系离子作为中心离子。通过X射线单晶分析,5种配合物均属于单斜晶系,空间群为P21/n。配合物1,2和配合物3虽然具有相同的分子通式,但配位方式明显不同,形成了前者为9配位的松饼型,后者是8配位的双帽三棱柱几何构型。二维面状超分子结构的形成方式也明显不同,区别在于配合物1和2通过微弱的π-π堆积作用形成。配合物4和5是同构的,结构中引入了硝酸根离子较为有趣,通过C―H···F氢键和π-π堆积作...     

绿色荧光配合物8-氨基喹啉硫氰酸镉的合成、晶体结构和荧光性质(英文)

<正>Crystal engineering has grown into a subject that attracts intense attention because controlling themolecular organization in the solid state can lead to materials with novel structures and promising proper-     

三个喹啉氧基乙酰胺镧系(Eu、Gd、Er)配合物的合成、结构及Eu配合物的荧光性质

合成并通过单晶衍射表征了3个稀土配合物Ln(L)(NO₃)₃(H₂O)(L=N-苯基-2-(5-氯-8-喹啉氧基)乙酰胺,Ln=Eu (1),Gd (2),Er (3)),结构与拥有相同有机配体的Pr,Nd和Sm配合物同构。在每个配合物中,十配位的稀土离子采取扭曲的双帽四方反棱柱配位构型,分别与来自1个配体L的2个氧原子和1个氮原子,2个双齿配位硝酸根和1个水分子配位。配合物1能够发射Eu(Ⅲ)离子特征荧光,荧光寿命为437 μs。     

Syntheses,crystal structures,magnetic and luminescent properties of lanthanide complexes with nitronyl nitroxide radical as ligand

Four lanthanide-nitronyl nitroxide radical complexes, [Ln(hfac)₃(NIT-3Methien)₂] (Ln = Pr (1), Tb (2), Dy (3), Ho (4); hfac = hexafluoroacetylacetonate; NIT-3Methien = 2-(3-methylthiophene)-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide), have been synthesized, and structurally and magnetically characterized. Single-crystal X-ray diffraction shows that 1–4 have similar mononuclear tri-spin structures in which central Ln(III) ions are eight coordinate by two NIT-3Methien radicals and three hfac coligands. The magnetic studies indicate that there are antiferromagnetic interactions between Ln(III) ions and radicals in 1, 2, and 4, while ferromagnetic interactions are present in 3. The luminescence properties of 2 and 3 were studied.     

基于对苯二甲酸根及邻菲咯啉的铁(Ⅱ)配位聚合物的水热合成、晶体结构和荧光性质

以对苯二甲酸(H₂bdc)、邻菲咯啉(phen)和硫酸亚铁为原料, 在水热条件下合成了一个新的配位聚合物[Fe(phen)(bdc)(H₂O)]_n, 并对其进行了元素分析、红外光谱、紫外-可见光谱、热重和X-射线单晶衍射表征。该聚合物属于三斜晶系, P1空间群。每个Fe(Ⅱ)与2个N原子和3个O原子配位形成高度畸变的三角双锥结构, 2个Fe(Ⅱ)由配体对苯二甲酸离子桥联为一维链状结构, 链与链之间通过O-H…O氢键作用形成三维结构。荧光测试表明配合物在368 nm处有荧光发射。     

基于对苯二甲酸根及邻菲咯啉的铁(Ⅱ)配位聚合物的水热合成、晶体结构和荧光性质

以对苯二甲酸(H2bdc)、邻菲咯啉(phen)和硫酸亚铁为原料,在水热条件下合成了一个新的配位聚合物[Fe(phen)(bdc)(H2O)]n,并对其进行了元素分析、红外光谱、紫外-可见光谱、热重和X-射线单晶衍射表征。该聚合物属于三斜晶系,P1空间群。每个Fe髤与2个N原子和3个O原子配位形成高度畸变的三角双锥结构,2个Fe髤由配体对苯二甲酸离子桥联为一维链状结构,链与链之间通过O-H…O氢键作用形成三维结构。荧光测试表明配合物在368 nm处有荧光发射。     

两个单核镍含氮配体配合物的合成、晶体结构及荧光性质(英文)

采用回流法在水溶剂中合成了2个含氮配体单核镍配合物[Ni(phen)2(H2O)2](1,6-nds)·2H2O(1)和[Ni(phen)3](1,6-nds)·10H2O(2)(1,6-nds=1,6-萘二磺酸根离子,phen=1,10-邻菲罗啉)。配合物1中,镍离子与2个1,10-邻菲罗啉和2个水分子配位,形成[Ni(phen)2(H2O)2]2+阳离子。2个没有配位的水分子通过氢键与[Ni(phen)2(H2O)2]2+和1,6-萘二磺酸根离子相互连接形成二维层状结构。配合物2中,镍离子与3个1,10-邻菲罗啉配位,形成[Ni(phen)3]2+阳离子。大量的氢键将自由的水分子和1,6-萘二磺酸根离子连接形成三维网状结构。2个配合物中1,6-萘二磺酸根离子均没有与镍离子配位,只是起到平衡电荷的作用。室温下,配合物显示了较大的荧光发射峰,其最大发射峰分别在443和438 nm。     

Ancillary ligand-controlled assembly of three coordination polymers: synthesis,characterization, luminescent,and catalytic properties

Abstract

By changing the ancillary ligands, three new zinc-based coordination polymers (CPs), {[Zn(4,4′-bpy)(H₂O)₄]·(TDC)·(H₂O)}_n (1), [Zn(2,2′-dmbpy)(TDC)]_n (2), and [Zn₂(3,3′-dmbpy)(TDC)₂]_n (3) (H₂TDC =2,5-thiophenedicarboxylic acid, 4,4′-bpy =4,4′-bipyridine, 2,2′-dmbpy =2,2′-dimethyl-4,4′-bipyridine, 3,3′-dmbpy =3,3′-dimethyl-4,4′-bipyridine) have been synthesized under the same reaction conditions (H₂O, pH =7–8, and 140°C) and were structurally characterized. 1 is a linear chain structure and further connected into a 3-D structure through hydrogen bonds. 2 shows a 2-D (4,4) network when the dinuclear [Zn₂(COO)₄N₂] building unit is regarded as a six-connected node. 3 has a twofold-interpenetrating 3-D zinc-organic framework pcu topology. Furthermore, 1–3 show strong photoluminescence at room temperature in the solid state, and the catalytic activities of 1–3 for degradation of methyl orange in a Fenton-like process have been investigated. The results suggest that the ancillary ligands influence the final resulting CPs.     

Synthesis,characterization and luminescent properties of three-coordinate copper(I) halide complexes containing diphenylamino monodentate phosphine ligand

Three-coordinate copper halide complexes with a bidentate phosphine ligand have received much attention. Here, a series of three-coordinate dinuclear copper halide complexes containing a diphenylamino monodentate phosphine ligand, [CuX(dpnp)]₂ (dpnp = N-[2-(diphenylphosphino)-4,5-dimethylphenyl]-N-phenylaniline, X = I (1), Br (2) and Cl (3)), were synthesized, and their molecular structures and photophysical properties were investigated. The structural analysis reveals that two copper(I) centers are bridged by two halogen ligands to form a dinuclear structure with a four-membered Cu₂X₂ ring. Crystal structures of 1–3 contain 1-D supramolecular arrays constructed by intermolecular C–H?π interactions. These complexes exhibit blue emission in the solid state at room temperature and have peak emission wavelengths at 483–487 nm with microsecond lifetimes (τ = 13.9–38.1 μs) and low emission quantum yields (<0.01%). The emission of complex 1 mainly originates from intraligand (IL) transition, whereas the emissions of complexes 2 and 3 are from a combination of MLCT, XLCT and IL transitions. The three complexes displayed good thermal stability.     

Synthesis,characterization and luminescent properties of three-coordinate copper(I) halide complexes containing 2-(diphenylphosphino)biphenyl

Highly emissive three-coordinate copper halide complexes with a bidentate phosphine ligand have attracted attention. Here, a series of three-coordinate mono- and dinuclear copper halide complexes, [CuI(dpbp)₂] (1) and [CuX(dpbp)]₂ (dpbp = 2-(diphenylphosphino)biphenyl, X = Br (2), Cl (3)), were synthesized, and their molecular structures and photophysical properties were investigated. In the solid state, these complexes exhibit green photoluminescence with microsecond lifetimes (λ_max = 515–538 nm; τ = 11.8–19.1 μs) at 298 K. The emission of the complexes originates from the (σ + X) → π* transition. All three complexes displayed good thermal stability.     

氰根桥联大环配合物的合成、结构与磁性研究

合成了三个氰根桥联的十二核大环齿轮状配合物[Cr（bpmb）（CN）2]6-[Mn（5-Brsalpn）]6·12H2O（1）、[Co（bpmb）（CN）2]6[Mn（5-Brsalpn）]6·12H20（2）和[Co（bpmb）-（CN）2]6[Mn（5-Clsalpn）]6·24H20·8CH3CN（3）（bpmb^2-=1,2-bis（pyridine·2-carboxamido）-4-methylbenzenate）,表征了其晶体结构和磁性．三配合物是同晶型的,包含交替排列的锰（Ⅲ）-Schiff碱阳离子和[M（bpmb）（CN）2]-阴离子,阴阳离子单元用氰根离子连成十二核环状结构．分子环直径约2nm．配合物1呈反铁磁性,说明通过氰根桥铬（Ⅲ）．锰（Ⅲ）离子间存在反铁磁相互作用．基于一维交替链模型（哈密顿算符H=-JCrMnN∑i=0Si·Si＋1）导出的磁化率公式与实验数据进行拟和得到磁耦合参数JCrMn=-2．65（6）cm^-1．