Structural Characterization and Luminescence Properties of Two 4d-4fLn-Ag Coordination Compounds Based on Dinuclear Lanthanide Clusters

Two new compounds,[ErAg（INA）2（C2O4）]·2H2O（1）（HINA=nicotinic acid） and [Tb0.8Y0.2Ag2（IN）4·（H2O）5]·NO3·2H2O（2）（HIN=isonicotinic acid）,based on the {Ln2} building units,have been hydrothermally synthesized and characterized by single-crystal X-ray diffraction,infrared spectroscopy,thermal analysis and powder X-ray diffraction（PXRD）.Single-crystal X-ray diffraction data reveal that both compounds crystallized in the low-symmetry triclinic space group P1-.Compound 1 is a 3D heterometallic coordination framework based on {Er2}clusters,oxalate ligands and bridging [Ag（INA）] linkers,while compound 2 consists of 0D [Tb0.8·Y0.2Ag2（IN）4（H2O）5]2 subunits that give a 3D supramolecular structure through hydrogen bond interaction.The photoluminescent properties of both compounds（1 and 2） were studied.     

稀土冠醚类配合物的研究(Ⅺ)——硝酸钪、钇与二苯并-24-冠-8的固态配合物的合成及性质

以无水乙腈为反应介质,合成了硝酸钪及硝酸钇与DB24C8的固态配合物,确定其组成为Sc(NO₃)₃·DB24C8·2H₂O和[Y(NO₃)₃]₄·(DB24C8)₃·8H₂O,并对冠醚及其配合物的某些性质进行了对比研究。     

三元体系LaCl3-Am(Am=Gly,Glu,Ser)-H2O(25℃)的研究

测定了3个三元体系LaCl₃-Am-H₂O(Am=Gly,Glu,Ser)在25℃时的溶度和饱和溶液的折光指数。报道了三元体系中生成的三元配合物La(Gly)Cl₃·2H₂O(A₁)、La(Gly)₃Cl₃·3H₂O(A₂)、La₂(Glu)₃Cl₆·8H₂O(C)、La(Ser)Cl₃·3H₂O(E)。用摩尔电导、红外光谱、X射线衍射、热分析及偏光显微镜鉴测定了各配合物的一些物理化学性质。     

Synthesis,Structure Characteristic and Thermal Behavior of Two New Metal-organic Azo-triazole Compounds: [Zn(phen)3]·ZTO·6H2O and[Cu(phen)3]·ZTO·6H2O

[Zn(phen)₃]·ZTO·6H₂O(1) and[Cu(phen)₃]·ZTO·6H₂O(2) were synthesized by the reaction of Zn(NO₃)₂·6H₂O/Cu(NO₃)₂·3H₂O with 4,4-azo-1H-1,2,4-triazol-5-one(ZTO) and 1,10-phenanthroline(phen). The two compounds were characterized by elemental analysis and IR spectrum analysis, respectively. Compound 1 was also characterized by single crystal X-ray diffraction analysis. For compound 1, the coordination geometry around the Zn²⁺ is a distorted octahedron, with the bite angles of 76.7(3)°-77.6(4)° for all three phen ligands. Moreover, the thermal behaviors and thermal decomposition kinetics were studied and analyzed. Besides, thermal stability and safety parameters(T_SADT, T_b) are 164.7 and 166.4℃ for compound 1, and 149.6 and 150.8℃ for compound 2, respectively.     

4-(1H-1,2,4-三唑-1-亚甲基)苯甲酸过渡金属配合物的合成、结构、抑菌活性及DNA裂解活性

Three novel transitionmetal compounds [Cu_0.5L]_n (1), {[Ni(L)₂·(H₂O)₂]·(H₂O)₂}_n(2), and {[Co(L)₂·(H₂O)₂]· (H₂O)₂}_n (3), were hydrothermally synthesized with 4-(1H-1,2,4-triazol-1-ylmethyl) benzoic acid (HL) and characterized by infrared spectroscopy, elemental analyses, single-crystal X-ray diffraction, thermal analyses, UV-Vis spectroscopy, and fluorescence spectroscopy. Structural analyses reveal that compound 1 features a one-dimensional (1D) chain, while isomorphic 2 and 3 exhibit a three-dimensional (3D) network structure with interchain hydrogen-bonding. Antifungal activities tests reveal that 1 has the highest antifungal effect on the five fungi (Fusarium graminearum, Vasa mali, Macrophoma kawatsukai, Colletotrichum gloeosporioides, and Alternaria alternate) among the three compounds. Furthermore, DNA cleavage experiments indicate that compound 1 has more efficient DNA (pUC 18) cleavage activity than compounds 2 and 3. The binding properties of the three compounds with DNA were also investigated by absorption. The results show that the three compounds can intercalate into DNA, and the interaction of compound 1 is the strongest.     

三元体系MgCl2-CO(NH2)2-H2O在25℃时的等温溶度与新相研究

测定了25℃时三元体系MgCl₂-CO(NH₂)₂-H₂O的等温溶度及饱和溶液的折光率和密度,且绘制成溶度图和性质-组成图.在三元体系内形成2个三元化合物新相:MgCl₂·CO(NH₂)₂·4H₂O(记作A)和Mgcl₂·4CO(NH₂)₂·2H₂O(记作B),B为新化合物.三元体系的溶度图由4支单饱和线[对应单饱和固相为MgCl₂·6H₂O、三元化合物A和B、CO(NH₂)₂]组成,这4支单饱和线两两交于3个三元无变点[对应双饱和固相为MgCl₂·6H₂O+A、A+B、B+CO(NH₂)₂].     

铈源对甲醇水蒸气重整制氢CuO/CeO2催化剂的影响

采用沉淀法合成了CeO_2载体,再经浸渍法负载活性组分得到CuO/CeO_2催化材料,探究了铈源(Ce(NO_3)_3·6H_2O、Ce Cl_3·6H_2O、Ce(NH_4)_2(NO_3)_6、Ce(SO_4)_2·4H_2O)对CuO/CeO_2催化性能的影响。通过采用XRD、SEM、N_2O滴定、BET和H_2-TPR等表征手段对催化材料的结构和性质研究发现,四种铈源合成的CuO/CeO_2催化材料在Cu比表面积、还原性能以及活性组分和载体间的相互作用方面存在着明显差别。其中,由Ce(NO_3)_3·6H_2O合成的CuO/CeO_2催化材料的Cu比表面积较大,CuO还原温度较低,CeO_2载体与CuO之间相互作用较强,在甲醇水蒸气重整反应过程中,表现出较佳的催化活性,在反应温度为553 K,水醇比n(H_2O)/n(MeOH)为1.2,甲醇水蒸气气体空速(GHSV)为1760 h~(-1)时,甲醇的转化率为100%,重整气中CO摩尔含量为0.84%。     

Synthesis,Crystal Structures and Catalysis of Dinuclear Cd(Ⅱ) Complexes Bridged by Unusual (N,O,O′)-Coordinated α-Amino Acids

Four dinuclear amino acid cadmium(Ⅱ) complexes [Cd₂(tren)₂(dl-alaninato)](ClO₄)₃·H₂O(Ⅰ), [Cd₂(tren)₂·(l-alaninato)](ClO₄)₃·H₂O(Ⅱ), [Cd₂(tren)₂(dl-phenylalaninato)](ClO₄)₃(Ⅲ) and [Cd₂(tren)₂(l-phenylalaninato)]· (ClO₄)₃(Ⅳ), constructed from mixed ligands of tris(2-aminoethyl)amine(tren) and racemic or natural amino acids( amino acids=dl- or l-alanine, and dl- or l-phenylalanine), have been synthesized and characterized by X-ray crystallography. The structural analysis of complexes Ⅰ and Ⅲ reveals that the cadmium centers are coordinated by one tren ligand and one amino acid molecule with the unusual (N,O,O′)-bridged mode, resulting in asymmetric chromophores of CdN₄O and CdN₅O in complex Ⅰ, CdN₄O₂ and CdN₅O in complex Ⅲ, respectively. The utility of the four complexes as efficient water-compatible Lewis acid catalysts for the direct aldol reaction in water was examined. The reaction proceeded smoothly to afford the corresponding β-hydroxy ketones in up to 99% yield. Moreover, the diastereoselectivity of the reaction favors the formation of the syn-isomers.     

纳米Ag@SiO_2核壳结构的表面等离子体共振效应对铕配合物的荧光增强作用(英文)

分别制备了二氧化硅壳层厚度为10、25和80 nm的三种Ag@S O2纳米粒子,合成了铕与不同比例苯甲酸根(BA)的配合物、铕与1,10-邻菲罗啉(phen)及2,2′-联吡啶(bpy)的配合物,并对其进行表征.表征结果推测配合物的组成为Eu(BA)nCl3-n·2H2O(n=1,2,3)、Eu(phen)Cl3·2H2O和Eu(bpy)Cl3·2H2O.配合物的荧光光谱显示,在加入Ag@Si O2纳米粒子后,复合物的荧光强度有不同程度的增加,这可能是由于表面等离子体共振造成的.不同硅壳厚度的Ag@Si O2纳米粒子的荧光增强顺序是25 nm80 nm10 nm,这表明二氧化硅核壳厚度约25 nm时有较强的表面等离子体共振效应.此外,在这些复合物中,Eu(phen)Cl3·2H2O复合物的增强效果是最强的,而Eu(BA)nCl3-n·2H2O的增强效果是最弱的.在三个苯甲酸铕配合物中,Eu(BA)3·2H2O的增强效果最弱,其他两个苯甲酸铕复合物增强效果相对较好.原因可能是含氮配合物(Eu(phen)Cl3·2H2O和Eu(bpy)Cl3·2H2O)可以和Ag@SiO2更好地成键,而苯甲酸铕配合物和Ag@Si O2纳米粒子的作用相对较弱.Ag@SiO2纳米粒子有望应用于增强稀土材料的发光.     

Crystal Engineering of Multiple-component Organic Compound:Organic co-Crystals of the Functional Groups of Carboxyl and Amino with Persistent Hydrogen Bonding Motifs

Three small organic molecular co-crystal compounds (C₃N₆H₆)·(C₆H₁₀O₄)·H₂O(1), C₃H₈N₂O(3) and (H₄btec)₂·(4,4'-bipy)(4)(H₄btec=1,2,4,5-benzenetetracarboxylic acid, 4,4'-bipy=4,4'-bipyridine) and one coordination supramolecular compound [Mn(C₂O₄)(H₂O)₂]·C₆H₁₁NO₂(2) were synthesized by hydrothermal reaction. They were characterized by elemental analysis, infrared(IR) spectroscopy and single crystal X-ray diffraction(XRD). Structural analyses reveal that these 2D or 3D supramolecular networks of the compounds were formed by C―H···O, N―H···O, N―H···N, O―H···O and O―H···N hydrogen bonds. Therein, the functional groups of ―COOH, ―NH₂ and ―OH play important roles in constructing supramolecular architectures.     

Controlling structural topology of metal-organic frameworks with a desymmetric 4-connected ligand through the design of metal-containing nodes

Two new metal-organic frameworks(MOFs),[Cu2(H_2O)_2(BCPIA)](BUT-20)and(Me_2NH_2)[In(BCPIA)](BUT-21)were designed and synthesized through the solvothermal reaction between a newly created desymmetric 4-connected ligand,5-(2,6-bis(4-carboxyphenyl)pyridin-4-yl)isophthalic acid(H_4BCPIA)and Cu(NO_3)2 2.5H_2O or In(NO_3)_3·5H_2O,respectively,and characterized by single-crystal and powder Xray diffraction,thermogravimetric analysis,infrared spectroscopy,and elemental analysis.The two MOFs have three-dimensional structures,in which both the BCPIA 4 ligand and metal-containing entities,Cu_2(COO)_4(H_2O)_2 and In(COO)_4 act as 4-connected nodes.However,different linkage configurations of the two metal-containing nodes,quadrilateral Cu_2_TD_2(COO)_4(H_2O)_2and tetrahedral In(COO)_4,lead to distinct structural networks of BUT-20 and 21,with Nbo and Unc topologies,respectively.     

二苯羧酸类稀土配合物对藤黄微球菌抑制作用的微量热研究

合成了4例二苯羧酸类稀土配合物:[Re_2(oba)_3(H_2O)_5]·H_2O[Re=La(1)、Ce(2)、Sm(3)、Er(4)](oba=4,4'-二羧基二苯基醚),利用元素分析、红外光谱和粉末X射线衍射等技术手段对其结构及组成进行了表征,热重分析表明,4例配合物具有良好的热稳定性。采用微量热法,实时跟踪监测4种目标配合物对藤黄微球菌的抑制作用,得到了热谱曲线。依据热动力学模型对热谱曲线进行解析,计算了生长和抑制过程的热动力学函数,在不同浓度配合物存在时,获得了细菌生长速率常数(k)、最大产热功率(P_(max))、传代时间(t_G)以及抑制率(I)等参数。结果表明,4种配合物对藤黄微球菌均具有抑制作用,抑菌效果依次为:[Er_2(oba)_3(H_2O)_5]·H_2O(4)[Sm_2(oba)_3(H_2O)_5]·H_2O(3)[Ce_2(oba)_3(H_2O)_5]·H_2O(2)[La_2(oba)_3(H_2O)_5]·H_2O(1)。     

稀土冠醚类络合物的研究(Ⅲ)——硝酸钪与邻苯二酮-17-冠-5及邻苯二酮-14-冠-4固态络合物的合成与性质

制得硝酸钪与两种冠醚的固态络合物,确定其组成为Sc(NO₃)₃·C₁₆H₂₀O₇·H₂O及Sc(NO₃)₃·C₁₄H₁₆O₆·H₂O。研究了冠醚本身及其钪的相应络合物的合成及有关性质。     

Synthesis,Structure and Characterization of Three Metal Molybdate Hydrates: Fe(H2O)2(MoO4)2·H3O,NaCo2(MoO4)2(H3O2)and Mn2(MoO4)3·2H3O

Three metal molybdate hydrates,Fe(H2O)2(MoO4)2·H3O(FeMo),NaCo2(MoO4)2(H3O2)(CoMo)and Mn2(MoO4)3·2H3O(MnMo),were synthesized by the mixed-solvent-thermal methods and characterized by singlecrystal X-ray...     

Third-order Optical Nonlinearities of a Series of Compounds Derived from a Keplerate Type Molybdenum-oxide-based Polyoxometalate

Abstract By reacting the unique Keplerate type molybdenum-oxide based polyoxometalate （NH4）42·[MoI320372·（CH3COO）30（H2O）y2]·ca.300H2·ca. 10CH3COONH4（1） with tetramethylammonium bromide, a new derivative （NH4）26[TMA]16{MoI32O372（H2O）72（CH3COO）30}·ca.7NH4CH3COO·ca.189H2O（2, TMA=tetramethylammonium） was prepared. Compound 2 was characterized by Fourier transform infrared spectroscopy（FTIR）, UV-Vis, elemental and thermogravimetric analyses. By the well-established Z-scan technique, investigations on the nonlinear opti- cal（NLO） properties of the series of compounds derived from the Keplerate type molybdenum-oxide-based poly- oxometalate, namely, the newly prepared compound 2, the three previously reported compounds, included compound 1, （NH4hs（TBA）24{Mo132O372（H2O）72（CH3COO）30}·ca.7NH4CH3COO·ca. 173H2O（3, TBA=tetrabutylammonium） and （DODA）40（NH4）2[（H2O）nMo132O372（CH3COO）3o（H20）72]（4, DODA=dimethyldioctadecylammonium）, reveal that the third-order nonlinearity[x（3）] values of compounds 1, 2 and 3 in the DMF/H2O solution and compound 4 in chloro- form are almost the same, which indicates that the counter cations with different length of alkyl chains show ignora- ble impacts on the NLO susceptibility. In other words, the remarkable third-order nonlinearities[x（3）≈10 19 m2/V2] mainly come from the [MoI32O372（CH3COO）30（H2O）72]42 anions. This fact reveals that the applications of the NLO active polyoxometalates in various environments（such as hydrophilic, hydrophobic, polar, apolar, etc.） can be achieved by simply varying cations to meet the demands in the design of diverse devices. Keywords Keplerate type polyoxometalate; Nonlinear optical property; Z-Scan technique; Self-defocusing; Reverse saturable absorption     

Structural tuning of coordination polymers by 4-connecting metal node and secondary building process

Due to variation in ligand's conformation, metal node's connecting geometry, and secondary building process by anions, bat-like, dumbell-like, diamondoid, or pillar-layer topologies are achieved.     

CuSO4(ZnSO4)-CO(NH2)2-H2O三元体系在30℃时的等温溶度研究

报道了CuSO₄(ZnSO₄)-CO(NH₂)₂-H₂O两个三元体系在30℃时的等温溶度及饱和溶液的折光率,绘制了相应的溶度图和折光率-组成图.两个三元体系中分别形成了组成为CuSO₄·3CO(NH₂)₂·H₂O(异成分溶解)和ZnSO₄·CO(NH₂)·2H₂O(同成分溶解)的化合物,并通过元素分析、红外光谱、X射线粉末衍射及热分析对新相进行了表征.     

固相配位化学反应研究(LXVII)─固－固相反应合成混配化合物

室温或近室温条件下,Co(acac)₂(H₂O)₂与第二配体2,2'-联吡啶、1,10-啡啰啉、8-羟基喹啉、水杨醛肟固相反应得到4个混配化合物,经XRD、IR、UV及元素分析表征了这些产物。     

Four Coordination Polymers Assembled with a New Biscarboxyl-functionalized Schiff Base Ligand

Based on a new biscarboxyl-functionalized Schiff base ligand 1,2-cyclohexanediamino-N,N'-bis[3-methoxyl-5-(p-carboxyl-phenylazo)] salicylidene(H₄L), four polymers,[(CH₃)₂NH₂]₂·[Mn₃(L)₂(H₂O)₄]·2DMF(CP1),[Fe₂(L)(H₂O)(DMF)](CP2),[(CH₃)₂NH₂]·[Cu(HL)]·H₂O(CP3) and[Ni₂(L)(teta)]·2DMF·H₂O(CP4), have been synthesized(teta=5,5,7,12,12,14-hexamethyl-1,4,8,11-tetraazacyclotetradecane). In CP1, both of the internal[N₂O₂] pocket and the external carboxylate groups of L^4- anion are ligated by Mn²⁺ ions, and the structure displays a layer. In CP2, the Fe²⁺ cations are linked by L^4- anions to form a binuclear double chain. CP3 displays a[Cu₂(HL)₂] dimer. In CP4, the Ni²⁺ ions are connected by L^4- anions to form a chain. The structures are further linked by hydrogen bonds to form 2D or 3D supramolecular architectures, respectively. CP1 exhibits adsorption ability to three organic dyes.     

One Dimensional Iron Molybdophosphate Anionic Chains with Different Structural Arrangements Reflecting a Flexibility Character

Structural comparison of a new compound[(bpp)₃H₆]Fe₂^IIIFe₂^IIMo₂₄^V(H₂PO₄)₈(HPO₄)₄(PO₄)₄O₄₈(OH)₁₂· (H₂O)₄·2H₂O(1)[bpp=1,3-di(4-pyridyl)propane] with our previously reported two compounds[(bpy)₃Fe^II]₃· Fe₂^IIIFe₂^IIMo₂₄^V(H₂PO₄)₈(HPO₄)₄(PO₄)₄O₄₈(OH)₁₂(H₂O)₄·12H₂O(2) and[(bpy)₃Fe^II]₂Fe^IIFe^IIIMo₁₂^V(H₂PO₄)₂(H_2-xPO₄)·(H_1+xPO₄)(HPO₄)₂(PO₄)₂O₂₄(OH)₆(H₂O)₂·9H₂O(x=0―1)(3)(bpy=2,2'-bipyridine), which all exhibit one-dimensional mixed-valence iron molybdophosphate anionic chains constructed by alternating connection of Fe^III ions and magic[Fe^II(Mo₆P₄O₃₁)₂] units, reveals that the non-hydrogen atomic ratios of Mo:Fe:P:O within the polymeric anionic chains are the same for all the three compounds, while the polymeric anionic chains of the different compounds bear different numbers of negative charges. And therefore there exist different numbers of counter cations per {Fe₂^III[Fe₂^II(P₁₆Mo₂₄^VO₁₂₄)]} unit found in the titled compounds. It discloses that not only are the spatial assembling of counter cations and polymeric inorganic chains of three compounds quite different, but also the O―Fe^III―O bond angles and Fe^III―O bond lengths of the three different inorganic chains exhibit small differences. What is more important is that such small changes in bond length and bond angle in the assemblage of Fe^III―O bonds lead to the considerable fluctuations of inorganic chains in their structural conformation within the three compounds, reflecting an interesting phenomenon of “flexibility" in the pure inorganic one dimensional mixed-valence iron molybdophosphate chains.