第二结构导向剂诱导形成的二维有机模板稀土硫酸盐

水热条件下合成了具有超大孔道和层状结构的有机模板稀土硫酸盐。超大孔道的稀土硫酸盐（1）的分子式为[（CH₃）₂NH₂]₉[Pr₅（SO₄）₁₂]·2H₂O,它展现出有趣的交叉二十元环孔道结构。层状的稀土硫酸盐的分子式为[H₃O]₃[（CH₃）₂NH₂]₃[Ln₂（SO₄）₆]（Ln=Pr,2;Nd,3）,它可以被看作是由双链和八元环结合而成。这3种化合物的合成揭示了大的有机胺（三聚氰胺）可能用作为第二结构导向剂,阻止形成高维数的无机骨架,从而诱导了二维层状结构稀土硫酸盐晶体的生长。对化合物1和3的磁性进行了研究,测试的温度范围在2~300 K。     

1,2-环己二胺缩邻香兰素单核与四核镱稀土配合物的近红外性质

通过配体1,2-环己二胺缩邻香兰素（H₂L）和不同的镱盐反应,合成了4个镱稀土配合物[Yb（H₂L）₂]（ClO₄）₃·2CH₃OH·H₂O（1）,[Yb₄（L）₄（NO₃）₂（H₂O）₂]（PF₆）₂·4CH₃CN（2）,[Yb₄（L）₄（H₂O）₂Cl₂]（PF₆）₂·2CH₂Cl₂·2H₂O（3）和[Yb₄（L）₄（NO₃）₂（H₂O）₂][Yb（NO₃）₃（H₂O）₂（CH₃OH）]（NO₃）₂ ·4CH₂Cl₂·6CH₃OH（4）。X射线单晶衍射分析表明配合物1为零维的单核结构,配合物2~4均为四核结构。研究了4个配合物的近红外发光性能。     

基于End-On叠氮桥联的混合价Co(Ⅱ/Ⅲ)和一维Cu(Ⅱ)链-席夫碱化合物的合成、结构及磁学性质

合成了2个化合物[Co^ⅡCo₄^Ⅲ（salhn）₄（N₃）₆（CH₃OH）₂（H₂O）₂]·4CH₃OH·2H₂O （1）和[Cu₂（salhn）（N₃）₂]_n（2）（H₂salhn=N,N''-bis （salicylidene） hydrazine）,并用X射线单晶衍射进行结构表征。化合物1是一个五核的[Co^ⅡCo₄^Ⅲ]钴簇,而化合物2是一个具有结构单元为[Cu₂（salhn）（N₃）₂]的一维链结构。2个化合物中叠氮均具有end-on （EO,μ-1,1）的配位模式。化合物1和2的磁学性质测试表明它们都具有反铁磁行为。     

1，2-环己二胺缩邻香兰素单核与四核镱稀土配合物的近红外性质

通过配体1,2-环己二胺缩邻香兰素（H2L）和不同的镱盐反应,合成了4个镱稀土配合物[Yb（H₂L）₂]（ClO₄）₃·2CH₃OH·H₂O（1）,[Yb₄（L）₄（NO₃）₂（H₂O）₂]（PF₆）₂·4CH₃CN（2）,[Yb₄（L）₄（H₂O）₂Cl2]（PF₆）₂·2CH₂Cl₂·2H₂O（3）和[Yb₄（L）₄（NO₃）₂（H₂O）₂][Yb（NO₃）₃（H₂O）₂（CH₃OH）]（NO₃）₂·4CH₂Cl₂·6CH₃OH（4）。X射线单晶衍射分析表明配合物1为零维的单核结构,配合物2~4均为四核结构。研究了4个配合物的近红外发光性能。     

基于柔性三齿配体的镉(Ⅱ)和锌(Ⅱ)配合物的合成、结构和荧光性质

柔性三齿配体1,3,5-tris（imidazol-1-ylmethyl）-2,4,6-trimethylbenzene（TITMB）和1,3,5-tris（triazol-1-ylmethyl）-2,4,6-trime-thylbenzene（TTTMB）与金属镉（Ⅱ）和锌（Ⅱ）分别反应,合成了配合物{[Cd₃（SO₄）₄（TITMB）₂（H₂O）₄][Cd（H₂O）₆]·2CH₃OH}_n（1）和{[Zn（TTTMB）（HCOO）₂]·CH₃OH}_n（2）。配合物1和2均采用单晶X射线衍射、红外光谱、固态荧光、热重分析和元素分析进行了表征。在配合物1中,存在着由硫酸根离子和Cd（Ⅱ）构成的一维链,其再与配体TITMB配位形成二维层状结构,[Cd（H₂O）₆]²⁺位于层与层中间平衡电荷。配合物2具有典型的6³二维蜂窝状拓扑结构。配合物1和2中的二维层状结构,均通过氢键作用延伸成为三维结构。配合物1和2均具有较高的热稳定性,并且在固态下释放蓝色荧光。     

基于柔性三齿配体的镉(Ⅱ)和锌(Ⅱ)配合物的合成、结构和荧光性质

柔性三齿配体1,3,5-tris（imidazol-1-ylmethyl）-2,4,6-trimethylbenzene（TITMB）和1,3,5-tris（triazol-1-ylmethyl）-2,4,6-trime-thylbenzene（TTTMB）与金属镉（Ⅱ）和锌（Ⅱ）分别反应,合成了配合物{[Cd₃（SO₄）₄（TITMB）₂（H₂O）₄][Cd（H₂O）₆]·2CH₃OH}_n（1）和{[Zn（TTTMB）（HCOO）₂]·CH₃OH}_n（2）。配合物1和2均采用单晶X射线衍射、红外光谱、固态荧光、热重分析和元素分析进行了表征。在配合物1中,存在着由硫酸根离子和Cd（Ⅱ）构成的一维链,其再与配体TITMB配位形成二维层状结构,[Cd（H₂O）₆]²⁺位于层与层中间平衡电荷。配合物2具有典型的6³二维蜂窝状拓扑结构。配合物1和2中的二维层状结构,均通过氢键作用延伸成为三维结构。配合物1和2均具有较高的热稳定性,并且在固态下释放蓝色荧光。     

氰基桥联的Fe2Ni双之字链的合成与磁性

利用四氰基构筑单元和不同位阻的吡啶类配体,合成了3例氰基桥联的Fe₂^ⅢNi^Ⅱ链状化合物。化合物{[Fe（bpy）（CN）₄]₂[Ni（bp）₂]·2H₂O}_n（1）（bpy=2,2''-联吡啶;bp=4-苯基吡啶）,{[Fe（bpy）（CN）₄]₂[Ni（papy）₂]·H₂O}_n（2）（papy=4-（苯基氮烯）吡啶）和{[Fe（bpy）（CN）₄]₂[Ni（azp）]·4H₂O}_n（3）（azp=1,2-二（吡啶-4-基）二氮烯）均为双之字型的链状结构。磁性测试表明化合物1~3均表现为链内的铁磁相互作用。化合物1表现出单链磁体行为,有效能垒为10.9 K。     

基于End-On叠氮桥联的混合价Co(Ⅱ/Ⅲ)和一维Cu(II)链-席夫碱化合物的合成、结构及磁学性质

合成了2个化合物[Co^ⅡCo₄^Ⅲ（salhn）₄（N₃）₆（CH₃OH）₂（H₂O）₂]·4CH₃OH·2H₂O（1）和[Cu₂（salhn）（N₃）₂]_n（2）（H₂salhn=N,N''-bis（salicylidene） hydrazine）,并用X射线单晶衍射进行结构表征。化合物1是一个五核的[Co^ⅡCo₄^Ⅲ]钴簇,而化合物2是一个具有结构单元为[Cu₂（salhn）（N₃）₂]的一维链结构。2个化合物中叠氮均具有end-on（EO,μ-1,1）的配位模式。化合物1和2的磁学性质测试表明它们都具有反铁磁行为。     

一类六核三价铁簇化合物的合成及结构表征

选择3种不同尺寸含氮配体（哌嗪、咪唑和三氮唑）与三羟甲基丙烷（H₃tmp）和FeCl₃采用溶剂热反应合成3例六核Fe（Ⅲ）合物：（C₅H₁₄N₂）[Fe₆（μ₆-O） Cl₆（tmp）₄]·2H₂O·CH₃OH（1）、（C₃H₅N₂）₂[Fe₆（μ₆-O） Cl₆（tmp）₄]（2）和（C₄H₈N₃）₃（C₂H₄N₃）[Fe₁₂（μ₆-O）₂Cl₁₂（tmp）₈]·3CH₃OH（3）,并对它们的结构进行表征。发现三元醇配体有利于合成高核金属簇。3个化合物具有相同的阴离子簇[Fe₆（μ₆-O） Cl₆（tmp）₄]^2-。通过晶体学参数,元素分析,红外等手段证实,在化合物1和3的体系中,氮杂环配体经历了N-和C-烷基化反应。     

一类六核三价铁簇化合物的合成及结构表征

选择3种不同尺寸含氮配体（哌嗪、咪唑和三氮唑）与三羟甲基丙烷（H₃tmp）和FeCl₃采用溶剂热反应合成3例六核Fe（Ⅲ）合物：（C₅H₁₄N₂）[Fe₆（μ₆-O）Cl₆（tmp）₄]·2H₂O·CH₃OH （1）、（C₃H₅N₂）₂[Fe₆（μ₆-O）Cl₆（tmp）₄] （2）和（C₄H₈N₃）₃（C₂H₄N₃）[Fe12（μ₆-O）₂Cl₁₂（tmp）₈]·3CH₃OH （3）,并对它们的结构进行表征。发现三元醇配体有利于合成高核金属簇。3个化合物具有相同的阴离子簇[Fe₆（μ₆-O）Cl₆（tmp）₄]^2-。通过晶体学参数,元素分析,红外等手段证实,在化合物1和3的体系中,氮杂环配体经历了N-和C-烷基化反应。     

Organically‐Templated Zinc and Thorium Sulfates with Chain and Layered Structures

Amine‐templated zinc sulfates of the formulae, [Zn(SO₄)(H₂O)₂(C₁₀N₂H₈)] ( I ) and [C₃N₂H₁₂][Zn(SO₄)] ( II ) both with linear structures have been prepared under hydro/solvothermal conditions. Of these, I has the chain structure formed by ZnO₄N₂octahedra and SO₄ tetrahedra, while II comprises ladders formed by corner‐sharing four‐membered rings. Amine‐templated thorium sulfates of the formula [HN(CH₂)₆NH]₂[Th₂(SO₄)₆(H₂O)₂]·2H₂O, ( III ) and [H₂N(CH₂)₄NH₂][Th₃(SO₄)₇(H₂O)₄]·5H₂O ( IV ) are also obtained under hydrothermal conditions. III has a sheet structure consisting of cages whereas IV has a two‐dimensional structure derived from the connectivity of ladders.     

Solvothermal Synthesis,Crystal Structures,and Magnetic Properties of Two Organically Templated Iron Sulfates with Chain Structures

Two new one‐dimensional (1D) organically templated iron(III) sulfates [C₂NH₈]₃ [Fe₃(μ₃‐O)₂(SO₄)₄] ( 1 ) and [C₂N₂H₁₀][C₂NH₇]_0.5[FeF(SO₄)₂] ( 2 ) were synthesized under solvothermal conditions and characterized by single‐crystal X‐ray diffraction, powder X‐ray diffraction (XRD), FT‐IR spectroscopy, elemental analyses, ICP analyses, and thermogravimetric analyses. Single‐crystal structure analysis reveals that both compounds show linear‐chain structures, involving FeO₆ (FeF₂O₄) octahedra and SO₄ tetrahedra. The magnetic properties of the two compounds have also been investigated.     

一系列由柔性N,N''-双(3-吡啶甲基)胺构筑的螺旋配合物的合成、结构和性质

合成和表征了5个螺旋配位聚合物{[Cu(Hbpma)(H₂O)₄]₂(SO₄)₃·3.5H₂O}_n (1)、{[Ni(Hbpma)(H₂O)₄]₄(SO₄)₆·10.75H₂O}_n (2)、{[Mn(Hbpma)(H₂O)4](SO₄)_1.5·3H₂O}_n (3)、{[Zn(Hbpma)(H₂O)₄]₄(SO₄)₆·4H₂O·4CH₃OH}_n (4)和{[Cu(Hbpma)2(H₂O)₂](SO₄)2·9H₂O}_n (5),其中bpma代表N,N'-双(3-吡啶甲基)胺。晶体结构分析表明配合物1~4为一维链状结构,配合物5为二维层状结构,其中金属离子由质子化的bpma配体桥连。值得注意的是,采取反-反式构象的柔性bpma配体使得配合物1和2为假螺旋链结构,配合物3和4为螺旋链结构,配合物5为螺旋层结构。同时研究了配合物的磁性和热稳定性。     

Solvothermal synthesis of new open-framework metal phosphites with structure-directing agents generated in situ

By using amide molecules and a urea derivative as the source of structure-directing agents (SDAs), three open-framework metal phosphites, (CH₃NH₃)₂·[Be₃(HPO₃)₄] (1), (CH₃CH₂NH₃)₂·[Be₃(HPO₃)₄] (2), and [(CH₃)₂NH₂]_1.5·(H₃O)_0.5·[Al₄(HPO₃)₇(H₂O)₃]·(H₂O)_0.5 (3), have been synthesized under solvothermal conditions. Compound 1 has left- and right-handed helical channels running along the [001] directions. Compound 2 possesses zigzag 12-ring channels running along the [001] direction. Compound 3 contains multidirectional 12-ring channels running along the [100], [010], and [110] directions. It is noteworthy that the direct use of methylamine, ethylamine and dimethylamine as SDAs can't produce corresponding single crystals of compounds 1–3, demonstrating the slow release of amines from amide molecules and urea derivative is a key process for the crystal growth.     

Hydrothermal syntheses,crystal structures and thermal stability of two divalent metal phosphonates with a layered and a 3D structure

Two new divalent metal phosphonates, [Cu₂{CH₃C(OH)(PO₃)₂}(H₂O)₂]?·?0.5H₂O (1) and [NH₃CH₂CH₂NH₃][Zn₃{CH₃C(OH)(PO₃)₂}₂(H₂O)]?·?H₂O (2), have been hydrothermally synthesized and characterized by single-crystal X-ray diffraction as well as with infrared spectroscopy, elemental analysis and thermogravimetric analysis. The structure of 1 comprises [Cu₃(hedp)₂]^2? layers connected by [CuO₄] units to form a 3D open-framework structure with a one-dimensional channel system along the b axis. In 2, the connections of alternately arranged [ZnO₄] tetrahedra, [ZnO₆] octahedra and [CPO₃] tetrahedra via vertex-sharing result in a 2D layered structure. The protonated ethylenediamine cations and water molecules are located between adjacent layers.     

Supramolecular compounds of indium sulfates with nitrogen-containing cations

Compounds with a general formula [Cat][In(H₂O) _n (SO₄)₂] _x · mH₂O (where Cat = C(NH₂)₃, H(2,2′-Bipy), H₂(4,4′-Bipy), H₂[Py(CH₂)₃Py], and H₃N(CH₂)₆NH₃) were synthesized and identified from the elemental analysis, IR, and thermogravimetric analysis data. X-ray diffraction analysis of crystalline [C(NH₂)₃][In(H₂O)₂(SO₄)₂] complex showed that the polymer chains of In aquasulfate form ensembles with guanidinium ions. The structure of [H₂(4,4′-Bipy)][In₂(H₂O)₆(SO₄)₄] · 2H₂O consists of the dimeric anions of indium sulfate. The coordination sphere of In includes three O atoms of three SO₄ groups and three O atoms of water molecules. The dimers are united into framework by diprotonated Bipy cations.     

New Perspectives in Polyoxometalate Chemistry by isolation of compounds containing very large moieties as transferable building blocks: (NMe4)5[As2Mo8V4AsO40] · 3H2O, (NH4)21[H3Mo57V6(NO)6O183(H2O)18] · 65 H2O, (NH2Me2)18(NH4)6[Mo57V6(NO)6O183(H2O)18] · 14 H2O,and (NH4)12[Mo36(NO)4O108(H2O)16] · 33 H2O

The compounds (NMe₄)₅[As₂Mo₈V₄AsO₄₀] · 3 H₂O 2a , (NH₄)₂₁[H₃Mo₅₇V₆(NO)₆O₁₈₃(H₂O)₁₈] · 65 H₂O 3a , (NH₂Me₂)₁₈(NH₄)₆[Mo₅₇V₆(NO)₆O₁₈₃(H₂O)₁₈] · 14 H₂O 3b and (NH₄)₁₂[Mo₃₆(NO)₄O₁₀₈(H₂O)₁₆] · 33 H₂O 4a ( 3a and 4a were not correctly reported in the literature regarding to their composition, structures and the oxidation states of the metal centres) which contain large isolated anionic species, have been prepared (among them 3a, 3b , and 4a in rather high yield) and characterized by complete crystal structure analysis as well as IR/Raman, UV/VIS/NIR, ESR spectroscopy and magnetic susceptibility measurements, redox titrations, bond valence sum calculations, elemental analyses and thermogravimetric studies. Perspectives for polyoxometalate chemistry referring to the synthesis of “extremely” large nanoscaled species are discussed, together with the occurrence of a large transferable {Mo₁₇} building block in the compounds 3a, 3b and 4a which also exists in the corresponding iron compound Na₃(NH₄)₁₂[H₁₅Mo₅₇Fe₆(NO)₆O₁₈₃(H₂O)₁₈] · 76 H₂O 7a .     

Syntheses,crystal structures,and magnetic properties of a series of Fe2Ln complexes

A family of phenoxo-bridged heterometallic Schiff base trinuclear complexes, [Fe₂LnL₂(C₃H₇COO)(H₂O)]·CH₃OH·CH₃CN·H₂O (Ln = Sm, 1; Gd, 2; Tb, 3; Dy, 4) is reported. Those complexes were afforded by “one-pot” reaction of a polydentate Schiff base ligand 2-hydroxy-3-methoxy-phenylsalicylaldimine (H₂L) with Fe(NO₃)₃·9H₂O, Ln(NO₃)₃·6H₂O and sodium butyrate (C₃H₇COONa) in a mixture of methanol and acetonitrile in the presence of triethylamine as a base. Single-crystal X-ray diffraction analysis reveals that the structures of the four complexes are isomorphic. In each complex, two anionic [FeL₂]^? units coordinate to the central lanthanide ion as a tetradentate ligand using its four phenoxo oxygens, forming a two-blade propeller-like molecular shape. Magnetic properties of 1–4 were investigated using variable temperature magnetic susceptibility, and weak ferromagnetic exchange between the Fe^III and Ln^III ions has been established for the Gd derivative. The Tb and Dy complexes show no evidence of slow relaxation behavior above 2.0 K.     

Topologisch und elektronisch bemerkenswerte „reduzierte”︁ Cluster des Typs [V18O42(X)]n− (X = SO4, VO4) mit Td-Symmetrie und davon abgeleitete Cluster [V(18–p)As2pO42(X)]m− (X = SO3, SO4, H2O; p = 3, 4)

Reduced Clusters with Remarkable Topological and Electronic Properties of the Type of [V₁₈O₄₂(X)]^n? (X = SO₄, VO₄) with T_d-Symmetry and Related Clusters [V_(18—p)As_2pO₄₂(X)]^m? (X = SO₃, SO₄, H₂O; p = 3, 4) The novel cluster-compounds Na₆[V₁₈O₄₂H₉(VO₄)] · 21 H₂O, (NH₄)₈[V₁₈O₄₂(SO₄)] · 25 H₂O, K₆[V₁₅As₆O₄₂(H₂O)] · 8 H₂O, (NH₄)₆[V₁₄As₈O₄₂(SO₃)], (NH₄)₆[V₁₄As₈O₄₂(SO₄)] and [N(CH3)₃]₄[₄V₁₄As₈0₄₂(H₂0)] were prepared and characterized by IR- and UV/Vis/NIR-spectroscopy, magnetic measurements and complete crystal structure analysis. For structural data see Inhaltsübersicht. Topological relations to the rhombicuboctahedron spanned by 24 0-atoms of the genuine hypothetical a-Keggin ion, at which the square planes are capped by V?O or As₂O groups, are discussed. Of particular interest are the ?extended”? Keggin ions [V₁₈O₄₂(X)]ⁿ- (X = SO₄ VO₄), (formaly derived from the hypothetical genuine a-Keggin ion by addition of six V?O groups) which have quite different electron populations in spite of the same structure of their cluster shells.