Bis(phthalocyaninato(2–)rhenium(II)): Synthesis,Properties, and Crystal Structure

Blue, paramagnetic bis(phthalocyaninato(2–)rhenium(II)) (μ_eff = 0,88 μ_B, per Re, at 300 K) is prepared by thermal decomposition of trans-bis(triphenylphosphine)phthalocyaninato(2–)rhenium(II), in boiling triphenylphosphine. It crystallizes in the triclinic space group P 1 with cell parameters as follows: a = 7.799(3) Å, b = 12.563(7) Å, c = 12.69(1) Å, α = 89.97(5)°, β = 94.14(5)°, γ = 106.39(4)°; Z = 1. Two cofacial phthalocyaninates are bonded together by a Re–Re bond with a Re–Re distance of 2.285(2) Å. The Re atoms are located distinctly outside the centre of the (N_iso)₄ planes by 0.426(3) Å. The Re–N_iso distance varies from 1.99(1) to 2.04(1) Å (average 2.02 Å). The pc^2– ligands are in an eclipsed conformation and concavely distorted. In the UV-VIS-NIR spectrum the B region is split into two bands of comparable intensity due to strong excitonic coupling. The Re–Re stretching vibration at 240 cm^–1 is selectively enhanced in the resonance Raman spectrum (λ_exc = 488 nm).     

一维链状锰配合物的合成、结构及磁性研究

合成了邻硝基苯磺酰化丙氨酸配体2-NBS-AlaH (1)(2-NBS-AlaH=邻硝基苯磺酰化丙氨酸)及其锰的配合物[Mn(4，4′-bipy)(H₂O)₄]₂[(4，4′-bipy)₂(H₂O)₃(2-NBS-Ala)₄] (2)。通过X-射线单晶衍射测定了其结构：配体通过氢键形成了一维链状结构；配合物2中，4，4′-bipy把锰离子连成了一维链状结构。磁性研究表明，配合物由于分子间的自旋耦合呈现出弱的铁磁性。     

具有(6，3)拓扑构造的镝配合物的水热合成、晶体结构和荧光光谱

用水热合成的方法得到了配合物{[Dy(1,2-pda)_3/2(H₂O)]·H₂O}_n(1,2-pda=1,2-邻苯二乙酸根),用X-射线衍射单晶结构分析确定了该配合物的晶体结构。该晶体属于单斜晶系,C2/c空间群。配合物中每个Dy³⁺离子被6个1,2-邻苯二乙酸根环绕,相邻的6个Dy³⁺离子被6对1,2-邻苯二乙酸根连接,形成具有六角形的[Dy(1,2-pda)₆]₂团簇,这些团簇进一步被1,2-邻苯二乙酸根桥联而得到具有(6,3)拓扑构造的3D网络结构。所有的1,2-邻苯二乙酸根配体用桥联/螯合-桥联五齿和螯合-桥联/螯合-桥联六齿两种配位模式与Dy³⁺离子配位。每个Dy³⁺还键合1个水分子。九配位的Dy³⁺离子的配位环境可描述为扭曲的单帽四方反棱柱。在配合物的荧光光谱的481和574 nm处出现了2条谱线,分别对应于Dy³⁺离子的 ⁴F_5/2 → ⁶H_15/2和 ⁴F_5/2 → ⁶H_13/2的跃迁。     

Synthesis, Crystal Structure and Magnetic Properties of a New Zn(II)-Nitronyl Nitroxide Complex

A new complex [Zn(NIT-1'-MeBzIm)Cl2(H2O)] (NIT-1'-MeBzIm = 2-{2'-[(l'- methyl)benzimidazolyl]}-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide) has been prepared and structurally characterized by X-ray diffraction method. Crystal data: monoclinic, space group P21/n, Z = 4, C15H21Cl2N4O3Zn, Mr = 441.63, a = 7.2225(10), b = 30.849(4), c = 8.8758(13) , β = 103.904(2)°, V = 1919.6(5) 3, Dc = 1.528 g/cm3, μ(MoKα) = 1.579 mm1, F(000) = 908, R = 0.0436 and wR = 0.1029 for 2456 observed reflections with I > 2σ(I). X-ray analysis reveals that the Zn(II) ion is four-coordinated with a distorted tetrahedron. There also exist H-bonds, π-π piling interactions and weak intermolecular contacts between the NO groups which form a mutual stagger 3-D network configuration. Magnetic investigation reveals that there exists intermolecular antiferro- and ferromagnetic interactions in the title complex.     

Synthesis,Crystal Structure,and Magnetic Properties of a New Dinuclear Iron Complex with Schiff Base Ligand

A new dinuclear iron(Ⅲ) complex has been synthesized and structurally characterized by X-ray crystallography: [FeⅢ2(L)(C6H5COO)(SO4)(CH3OH)2]·CH3CN·CH3OH(1, H3 L = N,N'-bis(salicylidene)-1,3-diamino-2-propanol). Complex 1 belongs to orthorhombic space group Pna21 with a = 11.4400(8), b = 22.9705(2), c = 12.5712(9) , V = 3303.5(4) 3, Z = 4, F(000) = 1576, Dc = 1.531 g·cm–3, Mr = 761.36, μ = 1.007 mm–1, S = 1.014, the final R = 0.0505 and wR = 0.1018. The crystal packing is stabilized by intermolecular O–H···O hydrogen bonds, forming an extended one-dimensional chain structure. The temperature dependence of magnetic susceptibility measurement shows that antiferromagnetic interaction is propagated between the metal centers. Fit as dinuclear arrangement gave parameters of J = 19.7 cm-1, g = 1.89 and R2 = 0.9999.     

新型联吡啶二羧酸镝配合物的合成及其性能

2,2'-联吡啶-6,6'-二甲酸(H2bpdc)与Dy2O3经水热反应合成了一个新型的联吡啶二羧酸镝配合物[Dy2(bpdc)3(H2O)3·0.5H2O(1)],其结构和性能经IR,元素分析,FL,X-射线单晶衍射和TG表征。实验结果表明:1具有较好的热稳定性;在336 nm紫外光激发下,1分别在484 nm(4F9/2→6H15/2)和576 nm(4F9/2→6H13/2)处发射Dy(Ⅲ)的特征荧光。     

A Novel Ruthenium(III) and Lithium Complex: Synthesis,Crystal Structure,and Magnetic Properties

A novel complex [Li₃{μ‐(H₂O)₆}(H₂O)₆]·[RuCl₆] has been synthesized and was characterized by single‐crystal X‐ray diffraction. The compound crystallizes in rhombohedral space group R3¯c, with the unit cell parameters a = b = 9.948(2)Å, c = 33.376(14)Å, γ = 120°, V = 2860.5(15)ų, Z = 6, D_c = 1.918 Mg m^—3, μ = 1.703 mm^—1, R = 0.0244, wR = 0.0478. The compound consists of a cation, which contains three lithium ions linked by six bridged water molecules, and an anion, which contains a ruthenium(III) ion. The whole complex can be described as a three‐dimensional structure linked by hydrogen bonds between cation and anion. The magnetic properties of the complex have been investigated. The IR, UV‐vis and EPR spectra are studied.     

A Study of Magnetic Relaxation in Dysprosium(III) Single-Molecule Magnets

Although the development of single-molecule magnets (SMMs) is rapid, there are only two families of high energy barrier (U_eff) dysprosium(III) SMMs known so far: the cyclopentadienyl (Cp) family with a sandwich structure and the pentagonal-bipyramidal (PB) family with D_5h symmetry. These high-barrier SMMs, which usually possess U_eff>500 cm⁻¹ allow the separate study of the four magnetic relaxation paths, namely, direct, quantum tunnelling, Raman and Orbach processes, in detail. Whereas the first family is chemically more challenging to modify the Cp rings, it is shown herein that the latter family, with the common formulae [DyX¹X²(L_eq)₅]⁺, such as X¹/X²=⁻OCMe₃, ⁻OSiMe₃, ⁻OPh, Cl⁻ or Br⁻; L_eq=THF/pyridine/4-methylpyridine, can be readily fine-tuned with a range of axial and equatorial ligands by simple substitution reactions. This allows unambiguous confirmation that the U_eff mainly depends on the identity of X¹ and X², rather than on L_eq. More importantly, the fitted parameters are barrier dependent. If X¹ is an O donor and X² is a halide, 500<U_eff<600 cm⁻¹, log τ_0avg (s)=−10.66, log C_avg (s⁻¹ K⁻ⁿ)= −5.05, n_avg=4.1 and T_H=9 K (in which τ₀ is the pre-exponential factor for the Orbach relaxation process, C and n are parameters used to describe Raman relaxation, and T_H is the highest temperature at which magnetic hysteresis is observed). For cases in which both X¹ and X² are O donors, 900<U_eff<1300 cm⁻¹, log τ_0avg (s)=−11.63, log C_avg (s⁻¹ K⁻ⁿ)= −6.03, n_avg=4.1 and 18<T_H<25 K. Based on these results, it can be further concluded that U_eff not only has a linear correlation to the axial Dy−X bond lengths, but also to T_H for these PB SMMs. This represents the first systematic study of a family of lanthanide SMMs and derives the first magneto-structural correlation in Dy SMMs.     

Synthesis, Crystal Structure and Magnetic Properties of Cobalt(II) Complex Involving Imino Nitroxide Radicals

1 INTRODUCTION The synthesis and study of transition metal com-plexes incorporating organic free radicals have arou-sed great interest in the field of molecular magne-tism[1]. Nitronyl nitroxide radicals (NITR), stable or-ganic radicals, have been widely used as molecularunits in the design and construction of magnetic ma-terials[2～5]. These radicals are especially attractivedue to that their donor atoms can assemble an exten-ded coordination geometry with changing magneticcoupling. A…     

Hydrothermal Synthesis, Crystal Structure and Magnetic Properties of a Novel Zero-dimensional Manganese（Ⅱ） Complex with 2,2′-Diphenic Acid and 1,10-Phenanthroline Ligands

A novel metal-organic coordination polymer [Mn3(2,2′-dipha)3(phen)6]n·3nH2O (2,2′-dipha = 2,2′-diphenic acid, phen = 1,10-phenanthroline) 1 has been hydrothermally synthe- sized and structurally characterized by single-crystal X-ray diffraction, elemental analyses, IR spectroscopy, and magnetic susceptibility measurements. The crystal crystallizes in triclinic, space group P1 with a = 16.921(5), b = 18.307(5), c = 18.450(5) , α = 113.369(5), β = 108.529(5), γ = 102.984(5)o, V = 4553(2) 3, C114H72Mn3N12O14.25, Mr = 2002.66, Dc = 1.461 g/cm3, μ(MoKα) = 0.488 mm1, the final F(000) = 2058, Z = 2, R = 0.0491 and wR = 0.0980 for 9087 observed reflections (I > 2σ(I)). In the crystal structure, the manganese atom is six-coordinated with two carboxylate oxygen atoms from different carboxylate groups of the same dipha and four nitrogen atoms from two different phen ligands, showing a slightly distorted octahedral geometry. Fur- thermore, it exhibits a zero-dimensional structure with dipha-Mn-phen- as building units. Variable- temperature magnetic measure shows an overall anti-ferromagnetic behavior for compound 1.     

Synthesis, Crystal Structure and Electrochemical Properties of a Novel Phenothiazine Derivative

A new compound 1,1‘-bis(3-pyridyl)-propylene(3,7-diformyl-N-ethylphenothiazinyl)ketone (C30H23N3O2S, Mr = 489.4) has been synthesized, and its crystal structure was determined by single-crystal X-ray diffraction method. The crystal is of orthorhombic, space group Ima2 with a = 27.491 (5), b = 11.942(2), c = 7.389(2) A, V = 2425.8(7) A^3, Z = 8, Dc =1.340 g/cm^3,μ = 0,167 mm ^1, F(000) = 1024, the final R = 0.0363 and wR = 0.0869 for 2054 unique reflections with Rint = 0.0254. The structural determination shows that the molecule assumes a butterfly configuration with nearly planar wings. In addition, the electrochemical study indicates that there is a high electronic delocalization in the molecule.     

Synthesis,Crystal Structure,and Magnetic Properties of a Quasi-one-dimensional Compound Based on TCNQ

A novel compound, （IBzQI）（TCNQ）2 2 （IBzQ1=1-（4-iodobenzyl）quinolinium and TCNQ = 7,7,8,8-tetracyanoquinodimethane） has been fabricated and X-ray single-crystal structurally analyzed. This compound crystallizes in the triclinic system, space group P1 with a = 8.3540（17）, b = 13.284（3）, c = 16.185（3） А, α= 82.12（3）, β= 75.19（3）, γ= 72.34°, V = 1651.2（6） А^3, Z= 2, C_40H_21IN_9, Mr = 754.56, Dc = 1.518 g/cm^3,μ= 1.015 mm^-1, S = 1.010, F（000） = 754, R = 0.0387 and wR = 0.0948. The structure analysis shows that the anions are stacked into column with tetrads, and there are two types of TCNQ entries （TCNQ-1 and TCNQ^0） in agreement with the IR spectra analysis of the compound. The temperature dependence of the magnetic susceptibility （2-300 K） for 2 exhibits spin gap of singlet-triplet feature, and the best fit gave △/kB = 1523.4 K. In order to understand both magnetic behavior and local charge distribution of [（TCNQ）2]-unit, the molecular orbital calculations and analysis based on extended Hückel method were performed, and the results support the analyses of both crystal structure and IR spectra.     

镝与二甘醇酸的配位聚合物的水热合成、晶体结构及荧光性质

DyCl₃·6H₂O与二甘醇酸(H₂dga)在水热条件下反应得到配位聚合物{[Dy₂(dga)₃(H₂O)₄]·2H₂O}_n，用X-射线衍射单晶结构分析方法确定了其晶体结构。该配合物的晶体属于正交晶系，C222₁空间群。在配合物中，Dy³⁺离子存在两种类型的配位环境。九配位的Dy1离子与3个二甘醇酸根的6个羧基氧原子和3个醚氧原子配位，其配位多面体可描述为一个扭曲的单帽四方反棱柱;八配位的Dy2离子周围的8个配位氧原子形成一个扭曲的四方反棱柱配位多面体，其中4个氧原子来自4个二甘醇酸根，另外4个氧原子由4个配位水分子提供。二甘醇酸配体的2个羧基和其醚氧原子同时与Dy³⁺离子配位而形成2D网状结构。 该配合物在室温下的固体荧光光谱显示了中心Dy³⁺离子的特征荧光，位于483 nm和574 nm的发射峰分别对应于Dy³⁺离子的 ⁴F_9/2 → ⁶H_15/2和 ⁴F_9/2 → ⁶H_13/2跃迁。     

镝(III)与酰腙及1,10菲啰啉多元配合物的晶体结构及荧光性质

在水乙醇混合体系中 ,首次得到 2 羰基丙酸水杨酰腙 (C10 H10 N2 O4) ,1,10 菲啉 (C12 H8N2 ,简写作phen)与Dy(NO3 ) 3 ·3H2 O的配合物 [Dy(C10 H8N2 O4) (phen) (NO3 ) (H2 O) 2 ]·H2 O .该配合物属单斜晶系 ,空间群为P2 1/c,晶胞参数a =1 5 2 4( 3 )nm ,b =1 10 18( 19)nm ,c =1 468( 3 )nm ,β =92 2 8( 2 )° ,V =2 4 63 ( 7)nm3 ,Z =4,μ =3 10 0mm-1,Dc=1 83 1g/cm3 ,F( 0 0 0 ) =13 40 ,R =0 0 3 14 ,wR =0 0 660 ,GOF =0 966.测试结果表明 ,该单晶结构为镝的 9配位配合物 ,其中一个 2 羰基丙酸水杨酰腙分子以羧基氧、酰胺基中的羰基氧和CN中的氮与Dy3 + 三齿配位 ,形成两个稳定的共边五元环 ,一个 1,10 菲啉分子以二齿方式配位、一个硝酸根和两个水分子也同时参与配位 ,在空间呈扭曲的单帽四方反棱柱 ,而在配合物周围还有一个游离的水分子 .发光性能测试表明配合物具有很好的荧光性能     

三维开放骨架结构混配型铜羟亚乙基二膦酸化合物的合成、结构和磁性研究

采用水热方法合成了一个具有新型三维骨架结构的混配型铜羟亚乙基二膦酸化合物Na₂Cu₃(hedp)₂(pz)(H₂O)₂(hedp=1-羟亚乙基二膦酸)，并对其进行了初步表征。X-射线单晶结构分析表明它属于三斜晶系，空间群为P1，晶胞参数为a=6.2435(17)?，b=7.100(2)?，c=11.998(3)?，α=84.400(4)°，β     

一种芴酮衍生物的合成、晶体结构及其光限幅性能

一种芴酮衍生物的合成、晶体结构及其光限幅性能;芴酮衍生物; 单晶结构; 光限幅性能     

含樟脑衍生物氰基桥联双金属配合物的合成、结构及磁性质

采用樟脑衍生物为配体，分别合成了氰基桥联Cu(Ⅱ)-Fe(Ⅲ)-Cu(Ⅱ)三核配合物[{Cu(D,L-La)₂}₂Fe(CN)₆](ClO₄) (1)和Mn(Ⅲ)-Fe(Ⅲ)双核配合物[Mn(D,L-Lb)(DMF)(Tp)Fe(CN)₃]·(H₂O)₆ (2)。晶体结构分析表明，化合物1中Cu(Ⅱ)离子处于五配位的配位环境，分别和1个D-La，1个L-La及[Fe(CN)₆]^3-中的1个氰基配位，2个Cu(Ⅱ)离子通过[Fe(CN)₆]^3-桥联。通过分子间氢键作用，化合物1形成二维超分子网络结构。化合物2中，[(Tp)Fe(CN)₃]^-通过其中的1个氰基与[Mn(D，L-Lb)]⁺桥联，其中Mn(Ⅲ)离子为六配位，分别和四齿配体Lb的2个氧原子和2个氮原子、DMF的1个氧原子及[(Tp)Fe(CN)₃]^-中的氰基氮原子配位。磁性研究表明，在化合物1中，Cu(Ⅱ)离子与Fe(Ⅲ)离子之间表现出铁磁相互作用，用哈密顿函数H=-2J(S₁·S₂+S₂·S₃)对其χ_MT-T曲线进行拟合，得到1的朗日因子g为2.190，交换常数J为0.55 cm^-1。     

The Structure,Characterization, and Magnetic Properties of Ca4–xNixIrO6 (x = 0.25, 0.5)

Ca_4–xNi_xIrO₆ (x = 0.25, 0.5) crystallizes with trigonal (rhombohedral) symmetry in the space group R3¯c, Z = 6, for Ca_3.75Ni_0.25IrO₆ a = 9.3013(1) Å, c = 11.1554(1) Å; for Ca_3.5Ni_0.5IrO₆ a = 9.2723(1) Å, c = 11.0825(1) Å. Ca_3.75Ni_0.25IrO₆ and Ca_3.5Ni_0.5IrO₆ are isotypic to compounds of the Sr₄PtO₆ structure type. The structure of Ca_3.75Ni_0.25IrO₆ has been solved by means of single crystal X-ray diffraction data analysis with the reliability factors of R = 0.019 and R_w = 0.022. Also, both structures have been determined by Rietveld refinement of powder X-ray diffraction data. The structure consists of chains of alternating face-sharing IrO₆ octahedra and (Ca/Ni)O₆ trigonal prisms. The chains are separated by the calcium cations which are in a distorted square antiprismatic coordination. Magnetic measurements revealed that both Ca_3.75Ni_0.25IrO₆ and Ca_3.5Ni_0.5IrO₆ follow Curie-Weiss behavior at high temperatures. Ca_3.75Ni_0.25IrO₆ undergoes a single antiferromagnetic transition at T_N = 5 K whereas Ca_3.5Ni_0.5IrO₆ undergoes two antiferromagnetic transitions at T_N1 = 13 K and T_N2 = 4 K.     

A New Dinuclear Copper (II) Complex of a Bis‐macrocyclic Ligand: Synthesis,Characterization, Crystal Structure and Magnetic Properties

A new dinuclear Cu(II) complex, [Cu₂L(N₃)₂](ClO₄)₁.₅ (OH)_4.5 · 2H₂O 0.5C₂H₅OH (1), of a bis‐macrocyclic ligand, 2,6‐bis(l,4,7,10‐tetraazacyclododecan‐10‐ylmethyl)‐methoxybenzene (L), has been synthesized, characterized and structurally determined by X‐ray diffraction analysis. Complex 1 crystallizes in orthorhombic crystal system, Pca2(l) space group with a = 1.5371(3), b = 1.6641(3), c = 3.0950(6) nm, V = 7.917(3) nm³, F_w = 904.62, Z=8, D_c= 1.529 g/cm³ and final R = 0.0568, wR = 0.1406 for 10410 observed reflections with I≥2σ (I). Both Cu(II) centers in the structure are coordinated by four nitrogen atoms of 1,4,7, 10‐tetraazacyclododecane (cyclen) and a nitrogen donor of the axial azide anion. Each Cu(II) center is in a square‐pyramidal coordination environment, and the intra‐and nearest inter‐molecular Cu? Cu nonbonding distances are 0.9855 and 0.7298 nm, respectively. Variable temperature magnetic susceptibility measurements in the range of 4.2–300 K indicate mat there exists weak intra‐ and inter‐molecular antiferromagnetic coupling between the Cu(II) centers with 27= ?4.2 cm^?1 and Θ = ?0.47 K.