一个新的超大铈锑钨酸盐阴离子Ce_3Sb_4W_2O_8(H_2O)_(10)(SbW_9O_(33))_4~(19-)

合成了一超大铈锑钨酸盐[Ce3Sb4W2O8（H2O）10（SbW9O33）4]（NH4）19·48H2O,用X射线单晶衍射法及元素分析确定了其结构.其晶胞参数为:α=1.890 8（6）nm,b=2.003 2（14）nm,c=2.865 3（12）nm,α=86.95（6）°,β=75.68（3）°,γ=67.52（5）°,υ=9.706（9）nm3,空间群P1.在杂多阴离子Ce3Sb4W2O8（H2O）10（SbW9O33）419-中,四个β-B-（SbW9O33）9-是通过一个大的中心集团[Ce3Sb4W2O8（H2O）10]17+连接起来的,中心集团中含有两个桥连{WO2-（H2O）}基,三个Ce（Ⅲ）离子和一个{Sb4O4}基团.三个Ce（Ⅲ）离子的配位数均为9,Ce（1）和 Ce（3）的配位环境相同,但不同于Ce（2）的配位环境,四个{SbW9O33}中的三个参与了向 Ce（Ⅲ）的配位.两个{SbW9O33}中的四个氧,三个水分子中的三个氧,{Sb4O4}中的一个氧及一个桥连{WO2（H2O）}中的一个氧向Ce（1）[或Ce（3）]配位;两个{SbW9O33}中的四个氧,两个水分子中的两个氧,{Sb4O4}中的一个氧及两个桥连{WO2（H2O）}中的两个氧向Ce（2）配位.在{Sb4O4}中,四个Sb原子的中心构成了一四面体.该离子属Cs点群,Sb（5）,Sb（8）和Ce（2）所在的平面是其对称面.     

一种二维的四核铁取代夹心型锑钨酸盐NdNa3[Fe4（H2O）10][β-B-SbW9O33]2·36H2O（英文）

在常温水溶液条件下,合成了一种二维四核铁取代夹心型锑钨酸盐NdNa3[Fe4(H2O)10][β-B-SbW9O33]2·36H2O(1),并通过IR光谱和单晶X射线衍射对其进行了表征.化合物1属于三斜晶系,P-1空间群,晶胞参数:a=1.264 8(3)nm,b=1.270 1(3)nm,c=1.616 0(4)nm,α=74.467(4)°,β=77.592(4)°,γ=83.658(4)°,V=2.438 9(9)nm3,Z=1,Dc=4.000g/cm3,GOOF=1.047,R1=0.065 6,wR2=0.162 2.X射线单晶结构分析表明,化合物1的多阴离子由两个相同的三缺位Keggin[β-B-SbW9O33]9-单元通过四个八面体配位的铁离子连接而成.四个FeO6八面体没有直接相连,四个FeIII离子可以分为两组:内部的FeIII离子带有两个水配体,而外部的FeIII离子连有三个水配体.邻近二聚多阴离子通过无序的钠/钕桥配离子构筑了二维层结构.     

[Zn2(C7H8O6)2(bipy)2(H2O)2]·4H2O手性配位聚合物的合成与晶体结构

采用溶剂热技术合成了一种新型手性配位聚合物[Zn2(C7H8O6)2(bipy)2(H2O)2]·4H2O(C7H8O6=2,3-氧-异丙叉基-L-酒石酸根, bipy=4,4'-联吡啶), 并通过单晶X射线衍射结构分析、元素分析、热重分析以及红外光谱进行了表征. 结构分析数据表明, 该化合物属单斜晶系, C2空间群, 晶胞参数a=2.02334(14) nm, b=1.13896(4) nm, c=1.01094(6) nm, β=117.366(3)°, V=2.0689(2) nm3. 两个晶体学独立的Zn原子均为八面体构型, 其中Zn1原子赤道配位点被2个酒石酸根中的4个羧酸根氧螯合配位, 2个酒石酸根中剩下的4个羧酸根氧中的2个分别与2个Zn2原子连接形成无限一维链, Zn2原子的另外2个反式赤道配位点被2个水分子氧占据, 同时这两种Zn原子的轴向配位点均被4,4'-联吡啶的氮原子占据, 形成具有矩形格子[0.51165(3) nm×1.13896(5) nm]的二维层状结构, 游离的2个水分子通过氢键作用形成二聚体, 并与酒石酸根中未与Zn配位的羧酸氧连接, 把二维层状结构连接成三维网状的超分子结构.     

含一价铜配合物的新型双金属钼氧簇合物[5-(4-Br-Ph)-2,4'-Hbpy]2·[CuⅠ(5-(4-Br-Ph)-2,4'-bpy)2]2[Mo8O26]的水热合成及晶体结构

采用水热法合成出一种含一价铜配合物的新型双金属钼氧簇合物[5-(4-Br-Ph)-2,4'-Hbpy]2[Cu(5-(4-Br-Ph)-2,4'-bpy)2]2[Mo8O26],并通过X射线单晶结构分析、红外光谱分析、元素分析以及X射线粉末衍射分析对该化合物的结构进行了表征.结果表明,该化合物属单斜晶系,P21/c空间群,晶胞参数a=1.4411(3)nm,b=1.3924(3)nm,c=2.5183(5)nm,β=99.06(3)°,V=4.990(17)nm3,Z=2;该化合物是由一价铜配合物{Cu(5-(4-Br-Ph)-2,4'-bpy)2}+与{β-Mo8O26}4-簇通过共价配位键连接形成的新型多金属钼酸盐,其中游离的质子化配体作为抗衡阳离子.     

一个新的超大铈锑钨酸盐阴离子Ce~3Sb~4W~2O~8(H~2O)~1~0(SbW~9O~3~3)^1^9^-~4

合成了一超大铈锑钨酸盐[Ce~3Sb~4W~2O~8(H~2O)~1~0(SbW~9O~3~3)~4](NH~4)~1~9.48H~2O,用X射线单晶衍射法及元素分析确定了其结构。其晶胞参数为：a=1.8908(6)nm,b=2.0032(14)nm,c=2.8653(12)nm,α=86.95(6)°,β=75.68(3)°,γ=67.52(5)°,V=9.706(9)nm^3,空间群P1。在杂多阴离子Ce~3Sb~4W~2O~8(H~2O)~1~0(SbW~9O~3~3)^1^9^-~4中,四个β-B-(SbW~9O~3~3)^9^-是通过一个大的中心集团[Ce~3Sb~4W~2O~8(H~2O)~1~0]^1^7^+连接起来的,中心集团中含有两个桥连{WO~2(H~2O)}基,三个Ce(Ⅲ)离子和一个{Sb~4O~4}基团。三个Ce(Ⅲ)离子的配位数均为9,Ce(1)和Ce(3)的配位环境相同,但不同于Ce(2)的配位环境,四个{SbW~9O~3~3}中的三个参与了向Ce(Ⅲ)的配位。两个{SbW~9O~3~3}中的四个氧,三个水分子中的三个氧,{Sb~4O~4}中的一个氧及一个桥连{WO~2(H~2O)}中的一个氧向Ce(1)[或Ce(3)]配位;两个{SbW~9O~3~3}中的四个氧,两个水分子中的两个氧,{Sb~4O~4}中的一个氧及两个桥连{WO~2(H~2O)}中的两个氧向Ce(2)配位。在{Sb~4O~4}中,四个Sb原子的中心构成了一四面体。该离子属C~s点群,Sb(5),Sb(8)和Ce(2)所在的平面是其对称面。     

配位聚合物{[Co2(HBTC)2(H2O)6]·C4H10N2·2H2O}n的水热合成、结构表征及荧光性质

采用水热法合成了配位聚合物[Co2(HBTC)2(H2O)6]·C4H10N2·2H2O}n(H3BTC为1,3,5-均苯三羧酸,C4H10N2为哌嗪),通过X射线单晶衍射、红外光谱和荧光光谱进行表征,并用TGA研究了该配位聚合物的热稳定性.晶体属三斜晶系,P1空间群,a=1.05437(9)nm,b=1.05485(9)nm,c=0.71482(5)nm,α=102.4623(28)°,β=91.3500(42)°,γ=111.0186(29)°,V=0.72018(10)nm3,Mr=764.37,Dc=1.762g·cm-3,Z=1,μ(MoKα)=1.25mm-1,F(000)=394,R=0.0307,wR=0.0815.晶体的基本构建单元中包含2个Co()中心、2个配位的HBTC分子和6个配位的水分子.基本构建单元通过相互链接形成具有“Z”型结构的一维配位聚合链,链间通过两种不同的氢键(O—H…O和N—H…O)相互作用,进而形成具有三维骨架结构的微孔晶体,微孔大小为0.71nm×0.82nm.荧光光谱表明,常温下用λex=312nm的光激发后,配位聚合物在329nm处出现强烈的荧光发射.     

[(C_6H_5NO_2)Pr(H_2O)_4](CrMo_6O_(24)H_6)·(C_6H_5NO_2)·2.5H_2O的合成与晶体结构

用常规合成方法制备了基于Anderson结构阴离子的二维层状化合物[(C6H5NO2)2Pr(H2O)4](CrMo6O24H6)·2.5H2O,通过红外光谱和X射线单晶衍射对其进行了表征.结果表明,该化合物属于单斜晶系,C2/c空间群.a=2.3442(9)nm,b=1.3291(5)nm,c=2.458(1)nm,β=103.08(1)°,V=7.460(5)nm3,R1=0.0727,wR2=0.1903.结构分析表明,[CrMo6O24H6]3-阴离子通过端氧担载一个配位的Pr3+离子形成中性的(C6H5NO2)Pr(H2O)4(CrMo6O24H6)基团,相邻的中性基团在Ot—Pr—Ot桥联下形成一维链,链与链又通过异烟酸的桥联形成二维层状结构.     

新型杂多阴离子[{Na2(H2O)3}Ni(H2O)VOAs4W40O140]21-的结构及表征

在pH=4.5的水溶液中,Na27[NaAs4W40O140]·60H2O与NiCl2·6H2O, NaVO3·4H2O和NH4Cl反应得到了不同过渡金属离子占据S2位的新型杂多钨酸盐(NH4)21[{Na2(H2O)3}Ni(H2O)VOAs4W40O140]·53H2O,用X射线单晶衍射法和元素分析确定了其结构.晶胞参数为a=2.3305(14) nm, b=2.9467(19) nm, c=1.2671(16) nm, V=8.701(9) nm3, Z=2,空间群Pmmn.在杂多阴离子[{Na2(H2O)3}Ni(H2O)VOAs4W40O140]21-中,配体{As4W40}的1个中心位和4个S2位可以选择性地被不同的金属离子所占据,其中相对的2个S2位被Ni2+和V5+统计性地占据,每种离子占据的概率为50%;{As4W40}中的另2个S2位分别被2个Na+占据,2个Na+间通过一配位水分子桥连.讨论了标题化合物的IR, TG和磁学性质.     

一个新的超大铈锑钨酸盐阴离子Ce~3Sb~4W~2O~8(H~2O)~1~0(SbW~9O~3~3)^1^9^-~4

合成了一超大铈锑钨酸盐[Ce~3Sb~4W~2O~8(H~2O)~1~0(SbW~9O~3~3)~4](NH~4)~1~9.48H~2O,用X射线单晶衍射法及元素分析确定了其结构。其晶胞参数为：a=1.8908(6)nm,b=2.0032(14)nm,c=2.8653(12)nm,α=86.95(6)°,β=75.68(3)°,γ=67.52(5)°,V=9.706(9)nm^3，空间群P1。在杂多阴离子Ce~3Sb~4W~2O~8(H~2O)~1~0(SbW~9O~3~3)^1^9^-~4中，四个β-B-(SbW~9O~3~3)^9^-是通过一个大的中心集团[Ce~3Sb~4W~2O~8(H~2O)~1~0]^1^7^+连接起来的，中心集团中含有两个桥连{WO~2(H~2O)}基，三个Ce(Ⅲ)离子和一个{Sb~4O~4}基团。三个Ce(Ⅲ)离子的配位数均为9，Ce(1)和Ce(3)的配位环境相同，但不同于Ce(2)的配位环境，四个{SbW~9O~3~3}中的三个参与了向Ce(Ⅲ)的配位。两个{SbW~9O~3~3}中的四个氧，三个水分子中的三个氧，{Sb~4O~4}中的一个氧及一个桥连{WO~2(H~2O)}中的一个氧向Ce(1)[或Ce(3)]配位；两个{SbW~9O~3~3}中的四个氧，两个水分子中的两个氧，{Sb~4O~4}中的一个氧及两个桥连{WO~2(H~2O)}中的两个氧向Ce(2)配位。在{Sb~4O~4}中，四个Sb原子的中心构成了一四面体。该离子属C~s点群，Sb(5),Sb(8)和Ce(2)所在的平面是其对称面。     

{Mo102}型纳米多孔无机富勒烯衍生物的合成、表征及三阶非线性光学性质

在室温酸性条件下, 利用高负电性的表面分布有20个{Mo9O9}型纳米孔道的无机富勒烯囊状阴离子[{(MoⅥ)Mo5ⅥO21(H2O)6}12{Mo2ⅤO4(SO4)}30]72-与胍基乙酸反应, 得到了表面分布有20个{Mo6O6}型纳米孔道的由102个Mo及氧原子组成的[{(Mo)Mo5O21(H2O)4SO4}12{MoⅤO(H2O)}30]12-小无机富勒烯囊状阴离子. 通过单晶X射线衍射、元素分析、FTIR、UV-Vis、TG-DTA、ESR等手段对其进行了表征. 该化合物属于三斜晶系, P1空间群, 晶胞参数a=2.5377(5) nm, b=2.5932(5) nm, c=3.9547(8) nm, α =83.58(3) °, β=86.15(3) °, γ=75.55(3) °, V=25.023(9) nm3. 利用脉冲时间为5 ns的532 nm激光通过Z-扫描实验得到该化合物的三阶非线性折射率γ=-3.29×10-18 m2/W, 三阶非线性极化率χ(3)=-1.04×10-23 m2·V-2, 表明该化合物具有较强的自散焦三阶非线性光学效应.     

Ni(phen)(H2O)(V2O6)的水热合成和晶体结构（英）

A novel compound Ni(phen)(H₂O)(V₂O₆) has been hydrothermally synthesized and structurally determined to be a two-dimensional compound, which contains {V₂O₆}_n^2n- chains interconnected by nickel(Ⅱ) complexes via oxygen atoms. The crystallographic data measured by single-crystal X-ray diffraction analysis are as follows: C₁₂H₁₀N₂NiO₇V₂, M_r=454.81, monoclinic, space group P2₁/c, a=0.784 6(3), b=2.103 6(8), c=0.942 3(4) nm, β=112.872(5)°, V=1.433 0(10) nm³, Z=4, D_c=2.104 Mg·m^-3, μ(Mo Kα)=2.615 mm^-1, F(000)=904, T=298(2) K, 4 480 reflections collected, 2 470 independent (R_int=0.032 2), the final R=0.058 4 and wR₂=0.145 7 for 2 303 observed reflections with I>2σ(I). CCDC: 192520.     

Synthesis, crystal structure and characterization of a 2-D network organic-inorganic hybrid polymer with [α-BW12O40]5- as building blocks

A two-dimensional network compound [Ce(DMF)4(H2O)][α-BW12O40]·H2O·(HDMA)2 (HDMA = protoned dimethylamine, DMF = N,N-dimethylformamide) was synthesized from α-H5BW12O40·nH2O, Ce(NO3)3·6H2O and DMF and characterized by IR, UV spectra and TG-DTA. The result of the X-ray single crystal diffraction indicates that the crystal is monoclinic, space group P21/n, with unit cell dimensional: a = 1.1983(3), b = 2.4216(5), c = 1.9517(4) nm, β = 92.91(3)°, Z = 4, R1 = 0.07710, wR2 = 0.1416. Structural analysis indicates that every [Ce(DMF)4(H2O)]3-building block is surrounded by three adjacent [α-BW12O40]5-polyanions, meanwhile, every [α-BW12O40]5-polyanion interconnects with three neighboring [Ce(DMF)4(H2O)]3+ subunits, by making use of which two-dimensional network structure can be constructed. The result of thermogravimetric analysis manifests that the title compound has two-stage weight loss and the decomposition temperature of the title polyanionic framework is 560℃. The electrochemical analysis shows the title polyanion has three-step redox processes in the pH = 4-7 media.     

Synthesis, Characterization and Crystal Structure of an Inorganic-organic Composite Metatungstate: [Co(4,4''-bipy)2(H2O)4](4,4''-H2bipy)2[H2W12O40]·5.5H2O

A novel hybrid compound [Co(4,4'-bipy)2(H2O)4](4,4'- H2bipy)2[H2W12O40]·5.5H2Ohas been synthesized from an acidified aqueous solution and characterized by elemental and thermal analyses, IR and UV spectroscopy, and single-crystal X-ray structure determination. Structure analysis indicates that the title compound is of monoclinic, space group C2/c, with a = 21.315(9), b = 15.303 (7), c = 24.139(10) (A), β = 105.170(5)o, V = 7599(6) (A)3, Mr = 3706.99, Z = 4, F(000) = 6616, Dc = 3.231, μ = 18.395 mm-1, R = 0.0652 and wR = 0.1594. X-ray crystallographic study shows that the title compound consists of one [Co(4,4'-bipy)2(H2O)4]2 cation, two diprotonated 4,4'-bipyridine molecules, 5.5 water molecules of crystallization, and one metatungstate polyoxoanion [H2W12O40]6-, which approaches an effective Td point symmetry. TG-DTA analysis indicates that the framework of the metatungstate polyoxoanion is collapsed at 587.0 ℃.     

[Pb2(TNR)2(CHZ)2(H2O)2]4H2O的结构及热分解机理

The coordination compound of [Pb 2(TNR) 2(CHZ) 2(H 2O) 2]•4H 2O was prepared by using the aqueous solution of carbohydrazide, lead nitrate and sodium styphnate. The molecular structure of [Pb 2(TNR) 2(CHZ) 2(H 2O) 2]•4H 2O(C 7H 13 N 7O 12 Pb, Mr=594.43) was determined by using a single crystal diffraction analysis .The thermal decomposition mechanism of the title compound was studied by TGDTG, DSC and IR techniques. The crystal belongs to monoclinic with space group P2 1/n.The unit cell parameters are as follows: a=0.64700(10)nm, b=1.6074(3)nm, c=1.4883(3)nm,β=97.42(2)°,V=1.5349(5)nm3, Z=2, DC=2.572g•cm -3 ,μ(Mo, Kα)=11.080cm -1 , F(000)=1128. R=0.0422, Rw=0.0735. The binuclear lead coordination compound is bridged by two carbohydrazide molecules. The molecule has a symmetrical center. TNR 2- ,CHZ and H 2O coordinate with the central ions simultaneously.     

Antiviral activity of polyoxomolybdoeuropate PM-104 against human immunodeficiency virus type 1

A polyoxomolybdoeuropate PM-104 (NH4)12H2[Eu4(MoO4)(H2O)16(Mo7O24)4].13H2O was found to be a potent inhibitor of the growth of human immunodeficiency virus type 1 (HIV-1), a causative agent of acquired immunodeficiency syndrome (AIDS). On the basis of TI50 [median cytotoxic concentration (CC50)/median effective concentration (EC50)], the in vitro anti-HIV-1 activity of PM-104 is favorably comparable to that of a heteropolyoxotungstate PM-19 K7[PTi2W10O40].6H2O, which is one of the most potent HIV-1 inhibitors among the polyoxometalates so far tested. The heteropolyoxomolybdate with a potent anti-HIV-1 activity is introduced for the first time in this communication.     

Synthesis, Structure, and Magnetic Properties of One Polyoxometalate (W/Mo) Compound: H8K{[Ni(H2O)5]2(H2Mo1.80W10.20O42)}Cl3·16H2O

One new polyoxometalate compound connected via nickel/potassium cations, H8K{[Ni(H2O)5]2(H2Mo1.80W10.20O42)}Cl3·16H2O 1, was prepared and characterized by elemental analysis and IR spectroscopy. Single-crystal X-ray diffraction analysis results reveal that clusters of [Ni(H2O)5]2(H2Mo1.80W10.20O42)}6-in compound 1 are linked by potassium cations to form one- dimiensional chains, based on which a three-dimensional network is further constructed via the hydrogen bonds of O…O and O…Cl. Magnetic measurements show that compound 1 has para- magnetic properties. Crystal data: H62Cl3KMo1.80Ni2O68W10.20, Mr = 3461.33, monoclinic, space group C2/c, a = 18.9291(19), b = 16.6758(17), c = 19.1064(19)(A), β = 106.6880(10)(, V = 5777.1(10) (A)3, Z = 4, Dc = 3.980 g/cm3, F(000) = 6250, μ = 21.574 mm(1, R = 0.0579 and wR = 0.1623 (Ⅰ ＞ 2σ(I)).     

A Novel 3D Extended Network Cobalt Paradodecatungstate:Synthesis,Characterization and Crystal Structure of [Co(H2O)5]2[Co(H2O)4]3[H2W12O42]·11H2O

A cobalt paradodecatungstate [Co(H2O)5]2[Co(H2O)4]3[H2W12O42]·11H2O has been successfully synthesized and structurally characterized by X-ray crystallography. Structure analysis indicates that the title compound is of monoclinic, space group P21/n, with a = 13.449(3), b =19.585(4), c = 13.990(3) (A),β = 113.79(3)°, V = 3371.8(12) (A)3, Z= 2, R= 0.0519 and wR= 0.1242.The title compound exhibits a novel 3D extended network structure constructed by interconnecting the paradodecatungstate polyanion [H2W12O42]10- clusters and cobalt11 coordination ions.     

有序介孔材料H6P2W18O62/TiO2(Brij-76)的制备与微波增强光催化降解一氯苯

采用非离子表面活性剂C18H37(OCH2CH2)10OH(Brij-76)作为模板剂, 在以杂多酸H6P2W18O62对TiO2掺杂改性基础上, 通过模板-溶胶-凝胶-程序升温溶剂热一步法在较低温度下制备了有序复合介孔材料H6P2W18O62/TiO2(Brij-76). 通过傅立叶变换红外(FT-IR)光谱, X射线衍射(XRD), 扫描电子显微镜(SEM), 能量色散X射线(EDX), N2吸附-脱附测定和NH3程序升温脱附(NH3-TPD)等手段对其进行了表征. 结果表明, 以非离子表面活性剂Brij-76为模板剂制得的复合材料H6P2W18O62/TiO2(Brij-76)平均孔径约为3.31 nm, BET比表面积为99.78 m2·g-1. 与TiO2相比, 其孔径有序性大幅度提高, 粒子的聚集度降低, 表面酸性显著增加. 微波增强光催化性能研究结果显示, H6P2W18O62/TiO2(Brij-76)在微波作用下催化活性更高, 可有效地降解一氯苯溶液.     

A Novel Two-dimensional Layer Compound Built up by Hexapolyoxotungstates and Coordinated Sodium Chains

1 INTRODUCTION There has been extensive interest in the synthesis of heteroxometallates owing to their fascinating pro- perties and great potential applications in many fields, such as catalysis, material science, medicine and magnetochemistry as well as their unusual topo- logical properties[1～4]. Although various preparation methods have been proposed for the preparation of such materials, to find new synthetic method for novel compounds in this field is still one of the major chal- le…