Synthesis of Coordination Polymers from the Heterometallic Carboxylate Complexes with Chelating N-Donor Ligands

Russian Journal of Coordination Chemistry - New trinuclear Cd–Ln molecular complexes [EuCd2(O2CC6F5)6(NO3)(Bipy)2] (I, Bipy is 2,2'-bipyridine) and [LnCd2(Bzo)6(NO3)(Phen)2] · 4MeCN...     

Synthesis,thermal behavior,and spectroscopic study of the solid nalidixate of selected light trivalent lanthanides

Journal of Thermal Analysis and Calorimetry - Solid-state [Ln(nal)3]·nH2O compounds, where Ln represents light trivalent lanthanide (La to Sm, except Pm), nal is nalidixate (C12H11N2O3), and n...     

Synthesis and crystal structures of new lanthanide isonicotinates: coordination polymers and molecular complexes

New coordination polymers [Ce(C5H4NCOO)3(H2O)2] · 0.5C6H4N2 · 1.5H2O, [Ln(C5H4N-COO)3(H2O)2] (Ln = Ce, Pr) and [Ho(C5H4NCOO)2(H2O)4]NO3, and the tetranuclear complex [Ho4(OH)4(C5H4NCOO)6(H2O)8](NO3)2 · 3.5C6H4N2 · 5H2O were prepared by heating aqueous solutions of lanthanide(III) nitrates with 4-cyanopyridine under conditions of hydro-thermal synthesis. X-ray diffraction study demonstrated that the lanthanide atoms in the coordination polymers are bridged in chains through coordination to the carboxyl group of isonicotinic acid. The metal atoms in the tetranuclear complex are bound in pairs by six bidentate isonicotinate ligands.     

Complexes of Lanthanide (Dy,Er, Yb) Thiocyanates with Tetramethylphenanthroline. Synthesis,Thermolysis, and SMM Properties

Russian Journal of Coordination Chemistry - The mononuclear neutral complexes [Ln(Me4Phen)2(H2O)(NCS)3]·Me4Phen·0.75EtOH (Ln = Dy, Er, Yb) were prepared for the first time by the reaction...     

Heteroleptic Ruthenium(II) 2,2'-Bipyridine Complexes Incorporating Bipyrazolate and 2-Pyridyl Pyrazolate Ancillaries

Russian Journal of Coordination Chemistry - Treatment of 5,5′-di(trifluoromethyl)-3,3′-bipyrazole (BipzH2) with cis-[RuCl2(Bipy)2]·2H2O (Bipy = 2,2′-bipyridine) or...     

STRUCTURE OF COMPOUNDS DERIVED FROM [Au(Dien)Cl]Cl2 AND PLATINUM CHLORIDE COMPLEXES

Journal of Structural Chemistry - Double complex salts [Au(Dien)Cl][PtCl4]·H2O (1) and [Au2(Dien*)Cl4]2[PtCl6]·2H2O (2), where Dien* is diethylenetriamine with a deprotonated imino group,...     

Sandwich heterometallic coordination polymers consisting of copper-cluster pillars and layered networks of {Ln6} wheels: synthesis,structures, spectroscopic properties and Judd–Ofelt analysis

Transition Metal Chemistry - Two novel 3-D Ln(III)–Cu(I) heterometallic coordination polymers, [Ln2Cu2(L3)4(C2O4)2]·H2O (Ln?=?Sm, Eu; HL3?=?5-aminonicotinic...     

Solubility of d-Element Salts in Organic and Aqueous-Organic Solvents: VII. Structure of Nickel Chloride Solvatocomplexes

Russian Journal of General Chemistry - Four complexes [Ni(DMA)2(H2O)4]Cl2·2H2O, [Ni(DMF)2(H2O)4]Cl2·2H2O, and [Ni(DMA)6][NiCl4], [Ni(DMF)2(H2O)2Cl2] were isolated from ternary...     

Syntheses and Crystal Structures of Two Cyano-bridged Bimetallic Complexes [Ce(DMSO)_4(H_2O)_3Fe(CN)_6]·H_2O and [La(DMSO)_4(H_2O)_3Co(CN)_6]·H_2O(DMSO = Dimethylsulfoxide)

1INTRODUCTION Recently,cyano-bridged lanthanide-transition me-tal complexes have been extensively investigateddue to their potential applications as precursors in the preparation of rare earth orthoferrites,fluores-cent and magnetic materials[1].Various complexes of this system have been obtained in order to ex-plore the relations between structures and pro-perties by using different ligands,such as DMF,4,4?-bipy,and so on,to fill the coordination sites of lanthanide ions[2～9].But up to…     

Application of differential scanning calorimetry to freeze-dried milk and milk fractions

Journal of Thermal Analysis and Calorimetry - Four ionic cobalt hexacyanidoferrate(II) complexes with formulae [Co(NH3)6]4[Fe(CN)6]3·12H2O (1) [Co(NH3)6]2Cl2[Fe(CN)6]·4H2O (2),...     

Anion-directed self-assembly of lanthanide-notp compounds and their fluorescence, magnetic, and catalytic properties

Reactions of 1,4,7-triazacyclononane-1,4,7-triyl-tris(methylenephosphonic acid) [notpH(6), C(9)H(18)N(3)(PO(3)H(2))3] with different lanthanide salts result in four types of Ln-notp compounds: [Ln{C(9)H(20)N(3)(PO(3)H)(2)(PO(3))}(NO(3))(H(2)O)].4H2O (1), [Ln = Eu (1 Eu), Gd (1 Gd), Tb (1 Tb)], [Ln{C(9)H(20)N(3)(PO(3)H)(2)(PO(3))}(H2O)]Cl.3H2O (2) [Ln = Eu (2 Eu), Gd (2 Gd), Tb (2 Tb)], [Ln{C(9)H(20)N(3)(PO(3)H)(2)(PO(3))}(H2O)]ClO4.8H2O, (3) [Ln = Eu (3 Eu), Gd (3 Gd)], and [Ln{C(9)H(20)N(3)(PO(3)H)(2)(PO(3))}(H2O)]ClO4.3H2O (4), [Ln = Gd (4 Gd), Tb (4 Tb)]. Compounds within each type are isostructural. In compounds 1, dimers of {Ln2(notpH4)2(NO3)2(H2O)2} are found, in which the two lanthanide atoms are connected by two pairs of O-P-O and one pair of mu-O bridges. The NO3- ion serves as a bidentate terminal ligand. Compounds 2 contain similar dimeric units of {Ln2(notpH4)2(H2O)2} that are further connected by a pair of O-P-O bridges into an alternating chain. The Cl- ions are involved in the interchain hydrogen-bonding networks. A similar chain structure is also found in compounds 3; in this case, however, the chains are linked by ClO4- counterions through hydrogen-bonding interactions, forming an undulating layer in the (011) plane. These layers are fused through hydrogen-bonding interactions, leading to a three-dimensional supramolecular network with large channels in the [100] direction. Compounds 4 show an interesting brick-wall-like layer structure in which the neighboring lanthanide atoms are connected by a pair of O-P-O bridges. The ClO4- counterions and the lattice water molecules are between the layers. In all compounds the triazamacrocyclic nitrogen atoms are not coordinated to the Ln(III) ions. The anions and the pH are believed to play key roles in directing the formation of a particular structure. The fluorescence spectroscopic properties of the Eu and Tb compounds, magnetic properties of the Gd compounds, and the catalytic properties of 4 Gd were also studied.     

A NOVEL TETRANUCLEAR NICKEL(II) SALAMO-BASED COMPLEX ADOPTING TWO OPEN CUBIC STRUCTURES: SYNTHESIS,CHRACTERIZATION, DFT CALCULATION,HIRSHFELD ANALYSIS,AND FLUORESCENT PROPERTIES

Journal of Structural Chemistry - A novel tetranuclear Ni(II) complex [Ni4(L)2(N3)4Cl(MeOH)3]·CH3COCH3 is synthesized via a symmetrical salamo-based ligand H2L, NiCl2·6H2O, and NaN3. The...     

Nickel(II) and cobalt(II) complexes with 4,5-dichloro-isothiazole-3-carboxylic acid and 1,10-phenanthroline: synthesis,crystal structures and cytotoxicity

Transition Metal Chemistry - In this study, Ni(II) and Co(II) complexes [Co(H2O)2L2] (1), [Ni(H2O)2L2] (2), [Co(phen)L2] (3), [Ni(phen)L2]·2H2O·EtOH (4·2H2O), and...     

Thermal Properties of the Aquadimethylsulfoxide Complexes [Ln(DMSO)n(H2O)m][Mo3S7Br7] where Ln=Pr,Nd, Eu,Tm

Synthesis, X-ray structural investigation, and study of the thermal properties of new aquadimethylsulfoxide complexes [Ln(DMSO)n(H2O)m][Mo3S7 Br7] containing the rare earth metals (Ln=Pr, Nd, Eu, Tm) were performed. In all complexes DMSO is co-ordinated through the O atoms. Thermal transformations of these salts were studied by quasi-equilibrium thermogravimetry a variant of CRTA (Controlled Rate Thermal Analysis) with constant rate of mass loss (0.3 mg min-1); helium flow keeps the partial pressure of self-generated DMSO/H2O atmosphere ~0.01 atm. [Pr(DMSO)6H2O]X where X=[Mo3S7Br7] decomposes with the formation of the intermediate phases Pr(DMSO)5X at 100-190°C and Pr(DMSO)3X at 250-270°C. Thermal decomposition of [Nd(DMSO)6(H2O)X·CH3CN leads to the intermediate phase Nd(DMSO)5X at 200-210°C. [Eu(DMSO)7(H2O)]X forms the intermediate phases Eu(DMSO)6X at 50-150°C and Eu(DMSO)5X at 190-210°C. Thermal decomposition of [Tm(DMSO)6(H2O)]X gives the intermediate phases Tm(DMSO)5X at 170-200°C and Tm(DMSO)4X at 240-250°C. The further decomposition takes place continuously for all phases. This revised version was published online in July 2006 with corrections to the Cover Date.     

左氧氟沙星铜(Ⅱ)配合物的合成及生物活性研究

合成了四个新左氧氟沙星铜(Ⅱ)配合物:[Cu(Lvfx)(Bipy)(H2O)]Cl.4H2O(1),[Cu(Lvfx)(Phen)(H2O)]Cl.5H2O(2),[Cu(Lvfx)(Tatp)(H2O)]Cl.5H2O(3),[Cu(Lvfx)(Dppz)(H2O)]Cl.4.5H2O(4){Lvfx=左氧氟沙星,Bipy=2,2’-联吡啶,Phen=1,10-邻菲罗啉,Tatp=1,4,8,9-四氮三联苯,Dppz=二吡啶并[3,2-a:2’,3’-c]吩嗪},并通过红外光谱法、紫外-可见光谱法、元素分析、原子吸收光谱法、摩尔电导率分析和差热-热重分析对配合物进行了表征。用滤纸片扩散法和试管二倍稀释法分别测试了配合物及配体对大肠杆菌、金黄色葡萄球菌的抗菌活性,结果显示配合物(3)对大肠杆菌具有最佳的抑菌效果。采用荧光光谱法初步研究了配合物与BSA的相互作用。结果表明,四个配合物均对BSA的荧光有较强的猝灭作用,且发生了能量转移,其与BSA的结合常数(K)分别为4.7×102、5.7×103、5.0×103和1.7×103L.mol-1,结合位点n分别为0.59、0.83、0.81和0.69。     

Hydrothermal Synthesis and Crystal Structure of a New Polyoxovanadate:[Mn(en)_3]_2en_(0.5)[HV_8~ⅤV_8~ⅣO_(38)(Cl)]·4.5H_2O(en=Ethylenediamine)

A new compound has been synthesized under hydrothermal conditions and characterized by IR,elemental analysis,XPS and single-crystal X-ray diffraction analysis. The title compound [Mn(en)3]2en0.5[HV16O38(Cl)]·4.5H2O crystallizes in monoclinic,space group C2/c,with a=17.016(4),b=18.858(4),c=18.872(4),β=93.667(4)o,V=6043(2)3,Z=4,Dc=2.242 g/cm3,Mr=2040.12,F(000)=4020,μ=2.895 mm-1,Rint=0.0921,R=0.0649 and wR=0.1325. Single-crystal X-ray structure analysis indicates that the title compound consists of a polyanion [HV8VV8IVO38(Cl)]4-cage,two [Mn(en)3]22+ cations,four and a half lattice waters and a half ethylenediamine. In addition,intermolecular O-H···N,O-H···O,N-H···O and C-H···O hydrogen bonds link the molecules together to form a three-dimensional structure.     

Anion encapsulation by Ln(III)/K(I) heterobismetal-capped cucurbit[5]uril

Three Ln(III)/K(I) (Ln = La, Ce and Nd) heterobismetal-capped cucurbit[5]uril molecular capsules, {[LaK(C₃₀H₃₀N₂₀O₁₀)Cl]Cl(H₂O)₃}Cl₂·8H₂O (1), {[CeK(C₃₀H₃₀N₂₀O₁₀)Cl]Cl(H₂O)₃}Cl₄(H₃O)₂ ^2 + ·8H₂O (2) and {[NdK(C₃₀H₃₀N₂₀O₁₀)Cl]Cl(H₂O)₃}Cl₂·12.5H₂O (3), were synthesised by self-assembly in aqueous solution, and their anion encapsulation property was confirmed by X-ray crystallography. The effect of the lanthanide cation radius on the structure of the heterobismetal-capped cucurbit[5]uril molecular capsules has been investigated.     

Four Gadolinium Coordination Compounds Derived from Various Tetrazole‐Containing Carboxylic Acids

Reactions of four different tetrazole‐containing carboxylic acids with GdCl₃ · 6H₂O, produced the coordination compounds, [Gd₄(pytza)₅(H₂O)₁₀(μ‐O) Cl] · 4H₂O · 2Cl ( 1 ) [pytza = 2‐(5‐(pyridine‐4‐yl)‐2H‐tetrazole‐2‐yl)acetato], [Gd(pztza)₂(H₂O)₆] · pztza · 3H₂O ( 2 ), [pztza = 2‐(5‐(pyrazin‐2‐yl)‐2H‐tetrazol‐2‐yl) acetato], [Gd(pmtza)₂(H₂O)₆]Cl · 2H₂O ( 3 ), [pmtza = 2‐(5‐(pyrimidyl‐2‐yl)‐2H‐tetrazol‐2‐yl) acetato], and Gd(tzpya)₂(H₂O)₅]Cl · 4H₂O ( 4 ) [tzpya = 2‐(4‐(5H‐tetrazol‐5‐yl)pyridin‐1(4H)‐yl) acetato]. The compounds were structurally characterized by elemental analysis, IR spectroscopy, and single‐crystal X‐ray diffraction. X‐ray diffraction analysis reveals that compound 1 displays a 2D single layered network and compounds 2 – 4 are mononuclear. Compounds 1 – 4 are self‐assembled to form 3D networks by hydrogen bonding interactions. Furthermore, the luminescent properties in the solid state at room temperature were investigated.     

Synthesis,structure, and properties of two coordination polymers constructed from 5-(isonicotinamido)isophthalic acid

Transition Metal Chemistry - Two three-dimensional (3D) coordination polymers, viz. [Ni(INAIP)(Him)(H2O)]·H2O (1) and [Fe(INAIP)(H2O)2]·H2O (2), were synthesized by reaction of...     

Microporous chiral metal coordination polymers: hydrothermal synthesis, channel engineering and stability of lanthanide tartrates

L-Tartrate ions can endure hydrothermal conditions up to 160 degrees C to form the robust, enantiopure open-framework coordination polymers [Ln2(L-TAR)3(H2O)2]3H2O, 1; the addition of succinate results in formation of the related [Ln2(L-TAR)2(SUC)(H2O)2]5.5H2O, with larger channels than , whereas racemic D/L-tartrate gives the more condensed [Ln2(D/L-TAR)3(H2O)2], . TAR = [C4H4O6]2-.