二(咪唑基)苯及戊二酸根构筑的三维镉配位聚合物的合成、晶体结构与荧光性质

用水热法合成了一个新的镉配位聚合物[Cd(BIMB)_0.5(glu)]_n(BIMB=1, 4-二(咪唑基)苯, H₂glu=戊二酸), 用红外, 元素分析进行了表征。X射线单晶衍射分析表明配位聚合物属于单斜晶系, P2₁/c空间群, a=0.822 06(5) nm, b=0.774 38(5) nm, c=1.877 93(10) nm, β=107.966°, V=1.137 nm³, Z=4, F(000)=684。在配合物中, 相邻的镉原子通过2个戊二酸连接成一维链状结构, 链状结构通过另一戊二酸拓展成二维层状结构, 相邻二维层状结构进一步由BIMB配体拓展成三维骨架结构。热重分析表明配合物具有较好的稳定性, 荧光光谱分析表明配合物具有较好的荧光性质。     

二维层状锌配合物[Zn(bibm)(glu)]n的合成、晶体结构及荧光性质

用水热法合成了1个新的锌配合物[Zn(bibm)(glu)]n(bibm=4,4′-二(苯并咪唑-1-甲基)联苯;glu=戊二酸),对它进行了红外光谱、元素分析、XRD、热重和荧光等表征,并用X-射线单晶衍射法测定了配合物的单晶结构。该配合物属单斜晶系,P21/n空间群,为二维层状结构。实验结果表明该配合物具有较好的荧光性质,是潜在的荧光光学材料。     

以对苯二甲酸、三乙烯二胺构筑的二维层状结构的镉配位聚合物的晶体结构和荧光性质

溶剂热条件下采用Cd(NO3)2.4H2O、对苯二甲酸和三乙烯二胺作为反应物合成出一个具有二维骨架结构的配位聚合物{Cd(bdc)(dabco)(DMF)].2H2O}n(1),并采用元素分析、红外光谱、差热分析和X-射线单晶衍射进行了研究及表征。晶体结构分析结果表明:对苯二甲酸离子(bdc)将Cd(Ⅱ)离子连接成一维链,相邻链之间进一步被三乙烯二胺(dabco)构筑成二维层状结构。沿c轴方向,垂直于二维层状结构中存在大小为0.74 nm×0.65 nm的一维通道。荧光谱图表明常温固态下配合物1发射蓝色荧光,荧光寿命为38.2 ns。     

具有kgd拓扑结构的二维铅配位聚合物的合成、结构及性质研究(英文)

醋酸铅(Pb(Ac)2·3H2O)和咪唑乙酸(Hima)通过溶胶凝胶扩散合成二维配位聚合物[Pb(ima)2]n(1)的单晶。X-射线单晶衍射分析表明,晶体属于单斜晶系,P21/n空间群,晶胞参数为:a=0.8750(2)nm,b=5.1226(12)nm,c=13.292(3)nm,β=93.570(4)°,V=594.6(2)nm3,Z=2。配合物[Pb(ima)2]n是一个具有二维kgd拓扑结构的配位聚合物,二维层间又通过C-H…O氢键连接形成三维超分子结构。对配合物的红外、元素、热重及荧光等性质进行了研究。     

由半刚性三羧酸配体构筑的一维和二维钴(Ⅱ)配位聚合物的合成、晶体结构及磁性质（英文）

采用水热方法,用半刚性三羧酸配体(H_3cpta)和菲咯啉(phen)或2,2′-联吡啶(2,2′-bipy)与CoCl_2·6H_2O反应,合成了一个一维链状配位聚合物[Co(μ_2-Hcpta)(phen)(H_2O)]n(1)和一个二维层状配位聚合物[Co_3(μ_5-cpta)_2(2,2′-bipy)_2]_n(2),并对其结构和磁性质进行了研究。结构分析结果表明2个配合物均属于单斜晶系,P21/c空间群。配合物1具有一维链状结构,而且这些一维链状结构通过C-H…O氢键作用进一步形成了二维超分子网络。而配合物2具有由三核钴单元构筑的二维层状结构。研究表明,配合物1和2中相邻钴离子间存在反铁磁相互作用。     

4，4′-二(苯并咪唑-1-甲基)联苯及樟脑酸构筑的二维镉配合物的合成、晶体结构及荧光性质

以4,4′-二(苯并咪唑-1-甲基)联苯和樟脑酸为配体,用水热法合成了1个二维镉配位聚合物[Cd(bbmb)(CAM)]n(bbmb=4,4′-二(苯并咪唑-1-甲基)联苯,H2CAM=樟脑酸),对其进行了红外光谱、元素分析、粉末XRD和热重分析等表征,并用X-射线单晶衍射法测定了配合物的单晶结构。该配合物属正交晶系,P212121空间群,为二维层状结构。对其二次谐波产生效率和荧光性质进一步研究表明该配合物具有二级非线性光学效应和较好的荧光性,是潜在的二阶非线性光学材料和荧光光学材料。     

以4,4′-二(苯并咪唑-1-甲基)联苯及邻苯二甲酸根构筑的锌配位聚合物的合成、晶体结构及荧光性质(英文)

水热法合成了1个新的锌配位聚合物[Zn(bbmb)(Pht)]n(bbmb=4,4′-二(苯并咪唑-1-甲基)联苯;H2Pht=邻苯二甲酸),对其进行了红外光谱、元素分析、PXRD和TGA等表征,并用X-射线单晶衍射法测定了配合物的单晶结构。该配合物属单斜晶系,P21/c空间群,为二维层状结构。晶胞参数为a=1.085 28(10)nm,b=2.286 7(2)nm,c=1.218 53(12)nm,β=102.589(3)°,V=2.951 3(5)nm3,Z=4。室温固态荧光测试显示,配合物在416 nm(λmax)具有强的荧光吸收。     

二维配合物[Cd(mpac)(4，4-bpy)(OH)]n的合成，晶体结构和荧光性质

溶剂热条件下采用Cd(NO3)2.4H2O,5-甲基吡嗪-2-甲酸和4,4-联吡啶作为反应物合成出一个新的具有二维层状结构的镉金属配位聚合物[Cd(mpac)(4,4-bpy)(OH)]n(1),并分别用元素分析,红外光谱,热重分析和X-射线单晶衍射表征该结构。晶体结构分析结果表明:5-甲基吡嗪-2-甲酸将Cd(Ⅱ)离子连接成一维链,这些链进一步被4,4-联吡啶连接成二维层状结构。在二维层状结构中存在大小为0.24×1.16 nm2的一维通道。荧光谱图表明常温固态下配合物1发射蓝色荧光。     

一个二维钴配位聚合物的合成、结构及光催化性质

以N,N'-二(3-吡啶基)-吡啶-3,5-二甲酰胺(bppdca)和2-巯乙酸基烟酸(L)为混合配体,利用水热合成方法获得了一个二维的Co(Ⅱ)配位聚合物:{[Co(bppdca)(L)]·3H₂O}_n,并通过元素分析、IR和单晶X射线衍射等技术手段确定了其结构。该配合物分子式为C₂₅H₂₄N₆O₉SCo,单斜晶系,P2₁/c空间群,a=1.07419(9) nm,b=0.86166(6) nm,c=2.9853(2) nm,β=96.772(1)°,Z=4,V=2.743 9(4) nm³,M_r=643.49,D_c=1.558 g/cm³,F(000)=1324,μ=0.766 mm^-1,S=1.051,R=0.0406,wR=0.1160。 晶体结构分析表明,配合物中的CoⅡ与来自2个bppdca配体的2个N原子、1个L阴离子的单齿羧基O原子和S原子以及来自另一个L阴离子的一个羧基中的2个O原子配位形成八面体配位构型。 相邻的Co^Ⅱ通过L阴离子连接成一维螺旋链[Co(L)]_n,相邻的左、右螺旋链通过成对的bppdca配体拓展成二维配位网络。 最终,相互平行的二维网络通过氢键作用拓展成三维超分子框架。 另外,还研究了该化合物的热稳定性、电化学性质、荧光性质以及选择性光催化性质。CCDC: 1010786     

5-氨基间苯二甲酸构筑的镉配位聚合物的合成、晶体结构及其荧光性质研究

采用普通溶液法合成配位聚合物{[Cd(Ⅱ)(NH_2-BDC)(H_2O)_3]}_n(NH_2-BDC=5-氨基间苯二甲酸),通过X-射线单晶衍射分析、红外光谱分析、热重分析以及荧光光谱分析等方法,对该配合物的结构进行测定和表征.分析结果表明,该配合物属正交晶系,空间群Pccn,晶体学参数a=0.739 9(5)nm,b=1.831 4(1)nm,c=1.510 8(1)nm,V=2.047 1(2)nm~3,Dc=2.243g/cm~3,μ(MoKα)=2.160(2),F(000)=1 360,S=1.069.每个镉离子周围有6个O原子与之配位,形成一个畸变的八面体.配位聚合物为一维链状结构,链与链之间通过芳香环的π-π堆积形成二维平面结构,而面与面之间通过分子间氢键作用形成三维网状结构.标题配合物能发荧光,最大发射波长是491nm,在发光材料方面有潜在的应用价值.     

Vaporization of DyI3(s) and thermochemistry of the homocomplexes (DyI3)2(g) and (DyI3)3(g)

The vaporization of DyI₃(s) was investigated in the temperature range between 833 and 1053 K by the use of Knudsen effusion mass spectrometry. The ions DyI₂⁺, DyI₃⁺, Dy₂I₄⁺, Dy₂I₅⁺, Dy₃I₇⁺, and Dy₃I₈⁺ were detected in the mass spectrum of the equilibrium vapor. The gaseous species DyI₃, (DyI₃)₂, and (DyI₃)₃ were identified and their partial pressures determined. Enthalpies and entropies of sublimation resulted according to the second- and third-law methods. The following sublimation enthalpies at 298 K were determined for the gaseous species given in brackets: 274.8±8.2 kJ mol⁻¹ [DyI₃], 356.0±11.3 kJ mol⁻¹ [(DyI₃)₂], and 436.6±14.6 kJ mol⁻¹ [(DyI₃)₃]. The enthalpy changes of the dissociation reactions (DyI₃)₂=2 DyI₃ and (DyI₃)₃=3 DyI₃ were obtained as Δ_dH°(298)=193.3±5.6 and 390.3±13.0 kJ mol⁻¹, respectively.     

Hydrothermal Syntheses, Structures, and Properties of Two New Potassium Vanadium Phosphates: K3(VO) (V2O3) (PO4)2(HPO4) and K3 (VO) (HV2O3) (PO4)2(HPO4)

Two new potassium vanadium phosphates have been prepared and their structures have been determined from analysis of single crystal X-ray data. The two compounds, K₃(VO)(V₂O₃) (PO₄)₂(HPO₄) and K₃(VO)(HV₂O₃)(PO₄)₂(HPO₄), are isostructural, except for the incorporation of an extra hydrogen atom into the nearly identical frameworks. The structures consist of a three-dimensional network of [VO]_n chains connected through phosphate groups to a [V₂O₃] moiety. Magnetic susceptibility experiments indicate that in the case of the di-hydrogen compound, there are no significant magnetic interactions between the three independent vanadium (IV) centers. Crystal data: for K₃(VO)(V₂O₃)(PO₄)₂ (HPO₄), M_r = 620.02, orthorhombic space group Pnma (No. 62), a = 7.023(4) Å, b = 13.309(7) Å, c = 14.294(7) Å, V = 1336(2) ų, Z = 4, R = 5.02%, and R_w = 5.24% for 1238 observed reflections [I > 3σ(I)]; for K₃(VO)(HV₂O₃)(PO₄)₂(HPO₄), M_r = 621.04, orthorhombic space group Pnma (No. 62), a = 6.975(3) Å, b = 13.559(7) Å, c = 14.130(7) Å, V = 1336(1) ų, Z = 4, R = 6.02%, and R_w = 6.34% for 1465 observed reflections [I > 3σ(I)].     

Synthesis and characterisation of HRuRh3(CO)12. Crystal structures of HRuRh3(CO)12, HRuRh3(CO)10(PPh3)2 and HRuCo3(CO)10(PPh3)2

A new ruthenium-rhodium mixed-metal cluster HRuRh₃(CO)₁₂ and its derivatives HRuRh₃(CO)₁₀(PPh₃)₂ and HRuCo₃(CO)₁₀(PPh₃)₂ have been synthesized and characterized. The following crystal and molecular structures are reported: HRuRh₃(CO)₁₂: monoclinic, space group P2₁/c, a 9.230(4), b 11.790(5), c 17.124(9) Å, β 91.29(4)°, Z = 4; HRuRh₃(CO)₁₀(PPh₃)₂·C₆H₁₄: triclinic, space group P$\text{1}$, a 11.777(2), b 14.079(2), c 17.010(2) Å, α 86.99(1), β 76.91(1), γ 72.49(1)°, Z = 2; HRuCo₃(CO)₁₀(PPh₃)₂·CH₂Cl₂: triclinic, space group P$\text{1}$, a 11.577(7), b 13.729(7), c 16.777(10) Å, α 81.39(4), β 77.84(5), γ 65.56°, Z = 2. The reaction between Rh(CO)₄^? and (Ru(CO)₃Cl₂)₂ tetrahydrofuran followed by acid treatment yields HRuRh₃(CO)₁₂ in high yield. Its structural analysis was complicated by a 80–20% packing disorder. More detailed structural data were obtained from the fully ordered structure of HRuRh₃(CO)₁₀(PPh₃)₂, which is closely related to HRuCo₃(CO)₁₀(PPh₃)₂ and HFeCo₃(CO)₁₀(PPh₃)₂. The phosphines are axially coordinated.     

Structure of two new borates YCa3(AlO)3(BO3)4 and YCa3(GaO)3(BO3)4

By replacing Mn in YCa₃(MnO)₃(BO₃)₄ with trivalent Al and Ga, two new borates with the compositions of YCa₃(MO)₃(BO₃)₄ (M=Al, Ga) were prepared by solid-state reaction. Structure refinements from X-ray powder diffraction data revealed that both of them are isostructural to gaudefroyite with a hexagonal space group P6₃/m. Cell parameters of a=10.38775(13)Å, c=5.69198(10)Å for the Al-containing compound and a=10.5167(3)Å, c=5.8146(2)Å for the Ga analog were obtained from the refinements. The structure is constituted of AlO₆ or GaO₆ octahedral chains interconnected by BO₃ groups in the ab plane to form a Kagomé-type lattice, leaving trigonal and apatite-like tunnels. It is found that most rare-earth and Cr, Mn ions can be substituted into the Y³⁺ and M³⁺ sites, respectively, and the preference of rare-earth ions to locate in the trigonal tunnel is correlated to the sizes of the M³⁺ ions.     

Crystal structures of phosphomolybdyl salts: Pb(MoO2)2(PO4)2 and Ba(MoO2)2(PO4)2

Crystal structures of Pb(MoO₂)₂(PO₄)₂ and Ba(MoO₂)₂(PO₄)₂ were determined. Both compounds contain the molybdyl group MoO₂. The monoclinic unit-cell parameters are a = 6.353(7), b = 12.289(4), c = 11.800 Å, β = 92°56(6), and Z = 4 for the lead salt and a = 6.383(8), b = 7.142(7), c = 9.953(8) Å, β = 95°46(8), and Z = 2 for the barium salt. $\text{P2}{}_1\text{c}$ is the common space group. The R values are respectively R = 0.027 and R = 0.031 for 1964 and 1714 independent reflections. The frameworks built up by a three-dimensional network of monophosphate PO₄ and molybdyl MoO₂ groups are similar, characterized mainly by corner-sharing PO₄ and MoO₆ polyhedra. Two oxygen atoms of each MoO₆ group are bonded to the molybdenum atom only as in other molybdyl salts.     

Ba3 (VO4)2-K2 Ba(MoO4)2 and Pb3 (VO4)2-K2 Pb(MoO4)2 systems

Phase equilibria in the Ba₃(VO₄)₂-K₂Ba(MoO₄)₂ and Pb3(VO₄)₂-K₂Pb(MoO₄)₂ systems have been investigated. In the first system, a continuous series of substitutional solid solutions with the palmierite structure is formed, and in the second one, the polymorphic transition in lead orthovanadate at 100°C restricts the extent of the palmierite-type solid solution to 10–100 mol % K₂Pb(MoO₄)₂. Original Russian Text ? V.D. Zhuravlev, Yu.A. Velikodnyi, A.S. Vinogradova-Zhabrova, A.P. Tyutyunnik, V.G. Zubkov, 2008, published in Zhurnal Neorganicheskoi Khimii, 2008, Vol. 53, No. 10, pp. 1746–1748.     

Platinumolefin bond strength in Pt(PPh3)2(CH2CH2) and Pt(PPh3)2 {C(CN)2C(CN)2}

The enthalpy of the reaction: Pt(PPh₃)₂ (CH₂CH₂)(cryst.) + C(CN)₂C(CN)₂ (g) → Pt(PPh₃)₂ {C(CN)₂C(CN)₂}(cryst.) + CH₂ CH₂ (g) has been determined as ΔH₂₉₈=?155.8±8.0 kJ·mol^?1, from solution calorimetry. The interpretation, that the platinumethylene bond is much weaker than the platinumtetracyanoethylene bond, is contrary to conclusions drawn recently from electron emission spectroscopic studies, but in agreement with available structural data.     

New open-framework in the uranyl vanadates A3(UO2)7(VO4)5O (A=Li, Ag) with intergrowth structure between A(UO2)4(VO4)3 and A2(UO2)3(VO4)2O

New uranyl vanadates A₃(UO₂)₇(VO₄)₅O (M=Li (1), Na (2), Ag (3)) have been synthesized by solid-state reaction and their structures determined from single-crystal X-ray diffraction data for 1 and 3. The tetragonal structure results of an alternation of two types of sheets denoted S for _∞²[UO₂(VO₄)₂]⁴⁻ and D for _∞²[(UO₂)₂(VO₄)₃]⁵⁻ built from UO₆ square bipyramids and connected through VO₄ tetrahedra to _∞¹[U(3)O₅-U(4)O₅]⁸⁻ infinite chains of edge-shared U(3)O₇ and U(4)O₇ pentagonal bipyramids alternatively parallel to a- and b-axis to construct a three-dimensional uranyl vanadate arrangement. It is noticeable that similar _∞[UO₅]⁴⁻ chains are connected only by S-type sheets in A₂(UO₂)₃(VO₄)₂O and by D-type sheets in A(UO₂)₄(VO₄)₃, thus A₃(UO₂)₇(VO₄)₅O appears as an intergrowth structure between the two previously reported series. The mobility of the monovalent ion in the mutually perpendicular channels created in the three-dimensional arrangement is correlated to the occupation rate of the sites and by the geometry of the different sites occupied by either Na, Ag or Li. Crystallographic data: 293 K, Bruker X8-APEX2 X-ray diffractometer equipped with a 4 K CCD detector, MoKα, λ=0.71073 Å, tetragonal symmetry, space group P4¯m2, Z=1, full-matrix least-squares refinement on the basis of F²; 1,a=7.2794(9) Å, c=14.514(4) Å, R1=0.021 and wR2=0.048 for 62 parameters with 782 independent reflections with I?2σ(I); 3, a=7.2373(3) Å, c=14.7973(15) Å, R1=0.041 and wR2=0.085 for 60 parameters with 1066 independent reflections with I?2σ(I).     

Synthesis and X-ray crystallographic structures of [HGa(NMe2)2]2 and [PhGa(NHNMe2)2]2, and room-temperature conversions of [HGa(NMe2)2]2 to (HGaNH)n and (HGaNMe)n

The reactivity of bis(dimethylamido) complexes of phenyl- and hydridogallium with ammonia, dimethylamine and 1,1-dimethylhydrazine is described. Synthesis of the starting gallium hydride, [HGa(NMe₂)₂]₂, was achieved in nearly quantitative yield from the reaction of HGaCl₂(quinuclidine) with LiNMe₂. In neat ammonia or methylamine at room temperature both dimethylamido ligands in [HGa(NMe₂)₂]₂ were substituted by a single equivalent of NH₃ or MeNH₂ to produce amorphous (HGaNH)_n or (HGaNMe)_n, respectively. In contrast, the reaction of [PhGa(NMe₂)₂]₂ with neat Me₂NNH₂, at room temperature consumed two equivalents of the substituted hydrazine to form [PhGa(NHNMe₂)₂]₂ in a 73% yield. Single crystal X-ray crystallographic analyses of [HGa(NMe₂)₂]₂ and [PhGa(NHNMe₂)₂]₂ establish that in the solid state both compounds adopt a cyclic Ga-N-Ga-N structure with a crystallographic center of symmetry located at the center of the ring.     

The reaction of Ru3(CO)12 and Os3(CO)12 with PH2Ph; the x-ray crystal structures of HRu3(CO)10(PHPh) and H2Ru3(CO)9(PPh)

Twelve new trinuclear complexes containing terminal PH₂Ph, edge-bridging PHPh and/or capping PPh ligands have been isolated from the reaction of M₃(CO)₁₂ (M = Ru or Os) with PH₂Ph in refluxing solvents. HRu₃(CO)₁₀(PHPh) (IIIa) crystallises in the monoclinic space group P2₁/c with a = 8.761(3), b = 11.402(4), c = 22.041(7) Å,β = 98.89(2)°, and Z = 4. The structure was solved by a combination of direct methods and Fourier difference techniques, and refined by blocked-cascade least squares to R = 0.027 for 3676 unique observed intensities. The X-ray analysis shows that one edge of the Ru₃ triangle is bridged by a hydride and the PHPh ligand, and that the phosphorus-bound hydrogen atom lies over the metal triangle and the phenyl group away from it. This provides an explanation for the ready formation of the capped species H₂Ru₃(CO)₉(PPh) (Va) on pyrolysis of the edge-bridged complex as opposed to the previously reported conversion of HOs₃(CO)₁₀(NHPh) to an orthometallated derivative under similar conditions. An X-ray analysis of H₂Ru₃(CO)₉-(PPh) (Va) confirms the capped geometry. the complex crystallises in the monoclinic space group P2₁/n with a = 9.323(4), b = 15.110(6), c = 45.267(15) Å,β = 91.84(3)°, and Z = 12. the structure was solved and refined using the same techniques as described previously. The final residual R is 0.061 for 4839 reflections. Some reactions of Va show that the phosphorous cap is difficult to displace and stabilises the molecule with respect to decomposition to non-cluster species.