Syntheses,Crystal Structures and Thermal Stabilities of Two New Mixed Ligated Coordination Polymers with Rigid Dicarboxylate and Flexile N-donor Ligands

Two new coordination polymers,[Co(BIPA)(bpp)](1) and [Zn(BIPA)(bpp)(H2O)](2)(H2BIPA = 5-bromoisophthalic acid,bpp = 1,3-di(4-pyridyl)propane) have been synthesized via hydrothermal reactions.The two compounds were characterized by elemental analysis,IR spectra,TG analysis and single-crystal X-ray determination.Compound 1 crystallizes in triclinic,space group P1 with a = 9.0316(13),b = 10.1179(14),c = 11.8884(17) ,α = 68.022(2),β = 84.749(2),γ = 77.791(2)°,V = 984.5(2) 3,Z = 2,C21H17BrN2O4Co,Mr = 500.21,Dc = 1.687 g.cm-3,μ = 2.932 mm-1,S = 0.981,F(000) = 502,R = 0.0440 and wR = 0.1357 for 3773 observed reflections with I > 2σ(I).Compound 2 crystallizes in the monoclinic system,space group P21/c with a = 7.8466(10),b = 27.483(4),c = 9.6583(13) ,β = 96.663(3)°,V = 2068.8(5) 3,Z = 4,C21H19BrN2O5Zn,Mr = 524.66,Dc = 1.685 g.cm-3,μ = 3.155 mm-1,S = 0.969,F(000) = 1056,R = 0.0441 and wR = 0.0517 for 4058 observed reflections with I > 2σ(I).The two compounds are constructed from the BIPA2-and bpp ligands but they exhibit different kinds of one-dimensional chain structures.In 1,the chains are composed of the Co(Ⅱ) ions and BIPA2-ligands,and the chains are further extended into a 2D framework structure by π...π interactions of the benzene rings from the BIPA2-ligands between the adjacent chains.In 2,the chains are made up of Zn(Ⅱ) ions and BIPA2-ligands through another fashion,and the chains are further linked via hydrogen bonding interactions to yield a two-dimensional supramolecular layer structure.Furthermore,the bpp ligand features two kinds of different coordination modes in the two compounds.     

Syntheses and Characterizations of Two New Coordination Polymers Based on Dicarboxylate and Nitrogen-contained Mixed Ligands

Two new carboxylate coordination polymers [Ni(2,3'-oba)(bib)]n] and [Mn(2,4'-oba)(bib)0.5]n(2,3'-oba = 2-(3-carboxyphenoxy)benzoic acid,2,4'-oba = 2-(4-carboxyphenoxy) ben-zoic acid and bib = 1,4-bis(2-methyl-imidazol-yl)butane) have been synthesized and characterized by elemental analysis,IR and X-ray single-crystal diffraction studies.Compound 1 crystallizes in monoclinic,space group P21/c,while compound 2 in the triclinic space group P.Compound 1 displays a one-dimensional ladder-like chain.The dinuclear paddle-wheel secondary building units(SBUs) constructed by four 2,4'-oba2-ligands in compound 2 are linked by bib into a 2D(4,4) layer structure.     

基于H3PW12O40·xH2O和3，5-二氨基-1，2，4-三氮唑的POMOF的合成、表征及催化氧化碘离子性能

采用水热法合成了一例结构新颖且罕见的Keggin型多金属氧酸盐基金属有机骨架化合物,即[Cu₄（3,5-datrz）₄][PW^Ⅵ₉W^Ⅴ₃O₃₉]·H₂O （1）,其中3,5-datrz=3,5-二氨基-1,2,4-三氮唑,并通过单晶X射线衍射、傅里叶变换红外光谱、热重分析、粉末X射线衍射和元素分析进行了表征。单晶X射线衍射分析表明：化合物1属于单斜晶系,空间群为C2/c,不对称结构包含2个Cu⁺、2个3,5-datrz配体、0.5个Keggin型磷钨酸阴离子和1个水分子,除结晶水外各组分之间通过共价键连接成Keggin型多金属氧酸盐基金属有机骨架化合物。以化合物1为非均相催化剂,在温度为55℃时催化H₂O₂氧化碘离子反应。结果表明,1催化下的碘单质生成速率为6.11×10^-7 mol·L^-1·s^-1,且重复使用次数达到6次时转化率仍能高达99.6%。     

含三唑-有机羧酸混合配体的配位聚合物

配位聚合物由于具有丰富的拓扑结构,并在客体交换与分离、气体存储、手性拆分、选择性催化、分子识别、荧光和磁性等方面有潜在应用,已成为当前配位化学、材料化学和晶体工程学的热点研究领域之一。本文结合近年来本课题组的研究工作及国内外相关研究进展,概述了含三唑-有机羧酸混合配体的配位聚合物结构和性质,着重讨论了有机羧酸配体在构筑配合物结构中的作用,并对今后的研究和发展方向进行了展望。     

Synthesis and Structure of a POMs-based 3D Zeolike Ionic Crystal, {[Co（dpdo）2（H2O）2（CH3CN）]2（SiMo12O40）（H2O）2}n

A POMs-based 3D zeolike ionic crystal 1, {[Co（dpdo）2（CH3CN）（H2O）2]2（SiMo12O40）- （HEO）2}n （dpdo = 4,4＇-bipyridine-N,N＇-dioxide）, was constructed via self-assembly by embedding Keggintype [SiMo12O40]^4- polyanions within the intercrystalline voids as pillars and structurally characterized. The crystal structure was determined by single-crystal X-ray diffraction. The crystal is of triclinic, space group P1 with a = 11.430（3）, b = 12.242（3）, c = 14.279（3）A, α = 106.196（4）,β = 94.316（4）, γ = 98.294（3）°, V = 1884.5（7）A^3 Z = 1, C44H50N10O54CoEMo12Si, Mr = 2880.17, Dc = 2.538 g/cm^3, p = 2.484 mm^-1,F（000） = 1388, the final R = 0.0383 and wR = 0.1096 for 7753 observed reflections with I 〉 2σ（I）. Flack factor is 0.22（3）. Compound 1 is a pillar-layered framework with the [SiMo12O40]^4- anions linearly located on the square voids between the 2D bilayers which are formed by the dpdo ligands and cobalt（II） ions.     

Hydrothermal synthesis,structure,fluorescence property of a novel 3D metal-organic framework with high thermal stability

A novel 3D metal-organic framework(MOF) with remarkable thermal stability,Ni(BIC)2.2·5H2O(JUC-86)(HBIC = 1-H-benzimidazole-5-carboxylic acid and JUC = Jilin University China),has been synthesized under hydrothermal conditions.It crystallizes in tetragonal symmetry with P43212 space group.The 3D structure consists of channels assembled from triple helices with a 4.5 × 4.52 aperture,which are formed by the parallel alignment of three infinite helical chains.The thermogravimetric analysis(TGA) and powder X-ra...     

Synthesis and Crystal Structure of a Novel Chiral 3D Metal-organic Framework Based on an N-methyl Substituted Salan Ligand

A chiral 3D metal-organic framework [CdL]·DMSO·H2O(1) was constructed by an N-methyl substituted salan ligand(H2L), and characterized by elemental analyses, IR, TGA, powder XRD and single-crystal X-ray crystallography. 1 crystallizes in the chiral hexagonal space group P6522 with a = b = 12.2175(3), c = 51.450(3) , V = 6650.9(4) 3, Z = 6, Mr = 883.45, Dc = 1.323 g·cm–3, F(000) = 2760, λ(CuKα) = 1.54178 , μ = 4.771 mm–1, GOOF = 1.041, R = 0.0313 for 3901 observed reflections with I 2σ(I) and wR = 0.0773. 1 consists of three identical sets of independent 3D frameworks interpenetrated with each other. In each set of such 3D frameworks, one half of the monomer(CdL)1/2 as the building unit forms double antiparrel helical chains which are further bridged together by other(CdL)1/2 units from adjacent helical chains. All CdL units in 1 adopt Δ geometry. DMSO and water guest molecules are found in the gap of the interpenetrated frameworks.     

三角柔性多羧酸金属有机骨架化合物的合成、结构及荧光性质

以柔性1,3,5-三（4-羧酸苯氧基）苯（H₃TCPB）为配体,以4,4''-联吡啶（4,4''-BPY）为辅助配体,在溶剂热条件下合成了2个新颖的分别具有三核锌簇和三核钴簇的金属有机骨架化合物：{[Zn₃（TCPB）₂（4,4''-BPY）]·DMF·3H₂O}_n（1）和{[Co_1.5（TCPB）（DMF）（H₂O）]·DMF}_n（2）,通过单晶X射线衍射,红外光谱,元素分析,热重分析和粉末X射线衍射对其结构进行了表征。单晶X射线衍射分析表明化合物1属于三斜晶系,P1空间群,表现出三维（3,8）连接的网状结构,拓扑符号为：{4³}₂·{4⁶·6¹⁸·8⁴}·{6};化合物2也属于三斜晶系,P1空间群,为二维（3,6）连接的网络层状结构,拓扑符号为：{4³}₄·{4⁶·6¹⁸·8⁴}。此外,荧光性质研究表明固态化合物¹在室温条件下发射出源于TCPB^3-和4,4''-BPY配体的淡蓝色荧光,而化合物2在相似的条件下没有荧光发射。     

Metal-ion Interactions with Sugars: Crystal Structure of Bis(4-dehydro-L-arabinose) Calcium Methanol Bishydrate

The crystal structure of the metal-organic frame Ca(C5H9O5)2·CH3OH·2H2O(1) has been synthesized and characterized.Complex 1 belongs to a tetragonal P43212 space group.In complex 1,the sugar moiety shows a beta-L configuration of pyranose form.The calcium(Ⅱ) is eight-coordinated,binding to four such sugar moieties,via O(1),O(2) of two molecules and O(3),O(4) of the other two,with the 4-hydroxy group being deprotonated.The water and methanol molecules are not coordinated to the calcium ion.     

一种用于检测四环素和对硝基苯酚的高稳定性镉(Ⅱ)金属有机骨架

采用水-溶剂热法合成了 1例金属有机骨架(MOF)：{[Cd(L)_0.5(4，4''-bpy)_0.5]·H₂O}_n (1)，其中 H₄L=(1，1''∶4''，1″-三联苯)-2，2″，4，4″-四羧酸，4，4''-bpy=4，4''-联吡啶)。通过单晶 X射线衍射、元素分析、粉末 X射线衍射、热重分析以及红外光谱分析对配合物1的结构进行了表征。单晶结构分析表明1为三维结构，属于单斜晶系，C2/c空间群，Cd(Ⅱ)连接L^4-和4，4''-bpy形成二维平面结构，层与层之间通过 L^4-连接，构筑成了三维网状结构。该 MOF表现出良好的稳定性并且可以通过荧光猝灭法检测四环素(TET)和对硝基苯酚(4-NP)，四环素和对硝基苯酚的检出限分别为0.15和0.062 μmol·L^-1。此外，还研究了其荧光猝灭机理。1可成功应用于延河水样中TET和4-NP含量的测定。     

Das wasserfreie Lanthanacetat,La(CH3COO)3, und sein Precursor,NH4)3[La(CH3COO)6] · 1/2 H2O: Synthese,Strukturen, thermisches Verhalten

Anhydrous Lanthanum Acetate, La(CH₃COO)₃, and its Precursor, ·NH₄)₃[La(CH₃COO)₆] · 1/2 H₂O: Synthesis, Structures, Thermal Behaviour Single crystals of (NH₄)₃[La(CH₃COO)₆] · ½ H₂O are obtained by refluxing La₂O₃in (CH₃COO)₃ · 1.5 H₂O with an excess of NH₄CH₃COO in methanol. The crystal structure (trigonal, R3 , Z = 6, a = 1 365.0(3) pm, c = 2 360(1) pm, R = 0.088, R_w = 0.061 exhibits the coordination number of nine for La³⁺, which is surrounded by three chelating-type bidentate and three unidentate acetate groups. Characteristic are monomeric units of [La(CH₃COO)₆]^3? which are connected to a three-dimensional network by hydrogen bonds with the NH ions. Thermal decomposition consists of four steps with La(CH₃COO)₃, La₂(CO₃)₃ and La₂O₂CO₃ as intermediates and La₂O₃ as the final Product. Single crystals of La(CH₃COO)₃ are obtained from La₂O₃ in a melt of NH₄CH₃COO (molar ratio 1:12) in a sealed glass ampoule. The crystal structure (trigonal, R3 , Z = 18, a = 2 203.0(5) pm; c = 987.1(3) pm, R = 0.027, R_w = 0.023) shows the coordination number of ten for La³⁺. These are three-dimensionally connected by oxygen atoms of the acetate groups with two tetradentate double-bridging and one Z,Z-type-bridging bidentate acetate group.     

咪唑-芳香多羧酸金属有机骨架化合物的合成、结构及性质

以5-(1H-咪唑)异酞酸(H₂L)为配体,在水热条件下合成了3个金属有机框架化合物:[PrL(HL)(H₂O)2]·H₂O (1),Er(H_0.5L)₂ (2)和[CoL(H₂O)2]·H₂O (3)。单晶X-射线衍射测试结果表明,3个化合物都属于单斜晶系,P2₁/c空间群。化合物1中,Pr³⁺为九配位,而化合物2和3中,Er³⁺和Co²⁺均为六配位。在镧系配合物1和2中,配体中氮原子未参与配位。1为2D折叠形结构,2为3D框架结构。在过渡金属配合物3中,氮原子与Co²⁺配位,这有助于形成平面二维结构。化合物1和3通过分子间π-π堆积,进一步形成3D结构。3个化合物均展现出较好的热稳定性。     

咪唑-芳香多羧酸金属有机骨架化合物的合成、结构及性质

以5-(1H-咪唑)异酞酸(H₂L)为配体,在水热条件下合成了3个金属有机框架化合物:[PrL(HL)(H₂O)₂]·H₂O(1),Er(H_0.5L)₂(2)和[CoL(H₂O)₂]·H₂O(3)。单晶X-射线衍射测试结果表明,3个化合物都属于单斜晶系,P2₁/c空间群。化合物1中,Pr³⁺为九配位,而化合物2和3中,Er³⁺和Co²⁺均为六配位。在镧系配合物1和2中,配体中氮原子未参与配位。1为2D折叠形结构,2为3D框架结构。在过渡金属配合物3中,氮原子与Co²⁺配位,这有助于形成平面二维结构。化合物1和3通过分子间π-π堆积,进一步形成3D结构。3个化合物均展现出较好的热稳定性。     

二聚体配合物[(n-Bu)2Sn(C10H8N2O3)(C2H5OH)]2的合成和晶体结构

The novel seven-coordinate complex [(n-Bu)₂Sn(C₁₀H₈N₂O₃)(C₂H₅OH)]₂ (C₁₀H₈N₂O₃^2- is the dinegative ion of 2-oxo-propionic acid benzoyl hydrazone) was synthesized by the reaction of (n-Bu)₂SnO with 2-oxo-propionic acid benzoyl hydrazone in 1∶1 molar ratio in benzene-ethanol (V/V, 3/1), and its structure was characterized by X-ray single crystal diffraction. The crystal belongs to a tetragonal system with space group I4₁/a, a=2.4890(2)nm, b=2.4890(2)nm, c=1.5170(3)nm, V=9.398(2)nm³, Z=8, F(000)=3968, D_c=1.366g·cm^-3, and the structure was refined to final R₁=0.0530, wR₂=0.0971. The structure of the title complex is described as a dimer through weak interactions of Sn…O bonding and hydrogen bond. The tin atoms rendered sev-en-coordination in a distorted pentagonal bipyramid geometry structure, four oxygen atoms [O1, O2, O2^#1 and O4] and one nitrogen atom N2 formed the equatorial plane and C11-Sn1-C15 is the axis. CCDC: 212696.     

一维链状酰基吡唑啉酮配合物Zn(C26H15N3O2Cl)2的合成、晶体结构及热稳定性

A one-dimensional chain complex bis{4-[(Z)-(4-chlorophenylamino)(2-furyl)methylene]-3-methyl-1-phenylpyrazol-5-onato}zinc(Ⅱ) Zn(C₂₆H₁₅N₃O₂Cl)₂ has been synthesized. Its structure was characterized by elemental analysis, IR, UV, thermal analysis and X-ray diffraction single crystal structure analysis. The title complex crystallizes in triclinic system, space group P1 with a=0.903 58(18) nm, b=1.359 8(3) nm, c=1.757 0(4) nm; α=102.42(3)°, β=101.24(3)°, γ=109.2(4)°, V=1.906 3(10) nm³. The final R factors are R=0.051 3 and wR=0.133 9. The zinc atom is four-coordinate involving two oxygen atoms and two nitrogen atoms forming a distorted tetrahedral geometry. The intermolecular hydrogen bonds C-H…N, C-H…Cl, C-H…π, together with intramolecular π…π stacking in the large congujate system, leading to the formation of a one-dimensional supramolecular chain. The results of TG-DTA analysis show that the title complex was stable under 323 ℃. CCDC: 299690.     

Charge Transfer Metal-Organic Framework Containing Redox-Active TTF/NDI Units for Highly Efficient Near-Infrared Photothermal Conversion

Metal-organic frameworks (MOFs), as a class of new inorganic-organic hybrid crystal materials, could have important applications in near-infrared (NIR) photothermal conversion. Herein, a new charge-transfer MOF (Co-MOF) with mixed ligands of H₄TTFTB and bpmNDI incorporating redox-active tetrathiafulvalene/naphthalene diimide (TTF/NDI) units into one system is reported. Due to the presence of TTF/NDI oxidative and reductive couples, stable radicals can be observed in the MOF. In addition, charge transfer from the electron donor (TTF) to the acceptor (NDI) results in a broad absorption in the NIR region. The Co-MOF exhibited an efficient photothermal effect induced by irradiation with a NIR laser. Under the 808 nm laser (0.7 W cm⁻²) illumination, the temperature of the Co-MOF increased from room temperature to 201 °C in only 10 s. Furthermore, a series of polydimethylsiloxane (PDMS) films doped with trace amounts of Co-MOF showed efficient NIR photothermal conversion. When a Co-MOF@PDMS (0.6 wt %) film is irradiated by 808 nm laser with power of 0.5 W cm⁻², it′s temperature can reach a plateau at 62 °C from 20 °C within 100 s. Our experimental results from the Co-MOF@PDMS film demonstrate that the effectiveness and feasibility of the material is promising for photothermal applications.     

基于H3PW12O40·xH2O和3，5-二氨基-1，2，4-三氮唑的POMOF的合成、表征及催化氧化碘离子性能

采用水热法合成了一例结构新颖且罕见的Keggin型多金属氧酸盐基金属有机骨架化合物，即[Cu₄(3，5 - dtrz)₄][PW^Ⅵ₉W^Ⅴ₃O₃₉]·H₂O (1)，其中3，5-dtrz=3，5-二氨基-1，2，4-三氮唑，并通过单晶X射线衍射、傅里叶变换红外光谱、热重分析、粉末X射线衍射和元素分析进行了表征。单晶X射线衍射分析表明：化合物1属于单斜晶系，空间群为C2/c，不对称结构包含2个Cu⁺、2个3，5-datrz配体、0.5个Keggin型磷钨酸阴离子和1个水分子，除结晶水外各组分之间通过共价键连接成Keggin型多金属氧酸盐基金属有机骨架化合物。以化合物1为非均相催化剂，在温度为55℃时催化H₂O₂氧化碘离子反应。结果表明，1催化下的碘单质生成速率为6.11×10^-7 mol·L-1·s^-1，且重复使用次数达到6次时转化率仍能高达99.6%。     

一种水中稳定的锌(Ⅱ)金属有机骨架用于检测四环素

采用溶剂热法合成1个锌(Ⅱ)金属有机骨架(Zn-MOF):[Zn (H₂L)(4,4''-bpy)]_n (1),其中H₄L=1,1''-乙烷基联苯-3,3'',5,5''-四羧酸,4,4''-bpy=4,4''-联吡啶。通过单晶X射线衍射、元素分析和热重分析等方法对其结构进行表征。单晶结构分析表明,1属于单斜晶系C2/c空间群,H₂L^2-配体采取单齿配位模式连接Zn(Ⅱ)形成一维链,4,4''-bpy连接一维链构筑成二维波浪状网。该化合物在水中表现出良好的稳定性,并且可作为高灵敏度、高选择性荧光探针检测四环素(TET),其检出限为0.17 μmol·L^-1。1可成功用于延河水中TET的测定。此外,还研究了1对TET的荧光猝灭机理。     

Synthesis and Crystal Structure of a Tetranuclear Carboxylate-bridged Lanthanum(III)-Zinc(II) Complex [La_2Zn_2(m-CNC_6H_4COO)_(10)(Py)_2(C_2H_5OH)_2]

1 INTRODUCTION In the past few years, more extensive attention had been paid to the research on the chemistry of the heterometallic complexes containing simultaneously lanthanide (Ln) and transition metal ions[1～9]. Interest has been largely focused on the magnetic properties resulting from the Gd(III)-Cu(II) couple, which has been found to be directly ferromagnetic irrespective of the structural details[1～5]. Recent studies have further revealed that the magnitude of the ferromagnet…     

两个由2,3,5-吡啶三酸构筑的三维网状配位聚合物的合成、晶体结构和性质研究

2,3,5-吡啶三酸在水热条件下分别与Mn(CH3COO)2·4H2O和Co(CH3COO)2·4H2O反应,得到了2种金属有机骨架(MOFs)配合物[Mn1.5(2,3,5-pta)(H2O)4]n(1)和[Co1.5(2,3,5-pta)(H2O)4]n(2),其中2,3,5-H3pta=2,3,5-吡啶三酸。利用元素分析、红外、热重和X-射线单晶衍射分析进行了表征。分析结果表明2个配合物属于同构晶体:晶系为单斜,空间群为P21/c,其中,吡啶三酸配体完全脱去3个质子,并分别与4个六配位的金属离子相连,在空间形成一种三维网络状结构。热重分析表明,配合物1的稳定性要高于配合物2。