Synthesis and Crystal Structure of a Decanuclear Silver(Ⅰ)-thiolate Compound Ag_(10)S[S_2P(OEt)_2]_8

Introduction Polynuclear Ag(I)-thiolate compounds are of interests due to their unique molecular structures and metal-metal interactions. There were some such compounds reported in literatures, including Ag8(6-S)(dtp)6 [dtp=S2P(OEt)2] with [Ag8] cube,1 {Ag[S2P(OC3H7)2]}6 with a [Ag6] distorted octahedron,2 Ag11S(Et2dtc)9 [Et2dtc=S2CN(C2H5)2] with a [Ag11] cage of a 3-fold axis,3 and Ag14(6-S)(SPh)12(PPh3)8 4CH3OH13H2O with a [Ag14S12] cage composed of a staggered [Ag6] octahedr…     

1,2-二(2-胺基苯氧基)乙烷银配合物的合成与晶体结构

本文采用配体1, 2-二(邻氨基苯氧基)乙烷(L)分别与AgPF6, AgCF3SO3, AgNO3和AgSbF6 进行配位反应,依次得到了四个配合物1 [Ag2(L)2(PF6)]、2 [Ag2(L)2(CF3SO3)2]、3 [Ag(L)NO3]n 和4 [Ag(L)2SbF6]n,并通过FTIR、元素分析、以及X射线单晶衍射等对配合物的结构与组成进行了表征。单晶衍射结果表明,配合物1和2为双核银(I)配合物,3和4为银(I)的配位聚合物。配合物1具有穴状结构,2经Ag?Ag键桥连两个配体形成扭曲的非平面结构。聚合物3的结构为一维(1D)“之”字链,4具有三维(3D)多孔的结构框架。在四个配合物结构中,相应的抗衡阴离子均未参与Ag(I)进行配位作用。     

伯胺N1923硝酸盐从硫代硫酸盐溶液中萃取银(Ⅰ)的机理

本文研究了伯胺N₁₉₂₃硝酸盐(RNH₃NO₃)从硫代硫酸盐溶液中对Ag(I)的萃取.结果表明,Ag(I)同时以AgS₂O₃^-和Ag(S₂O₃)₂^3-两种形式萃入有机相.     

Synthesis and Crystal Structure of Binuclear Silver(I) Complex with 2-nitro-(2-pyridylsulfanylmethyl)benzene

1 INTRODUCTION Metallosupramolecular species with metal-metal interactions have been designed and synthesized due to their potential applications as functional materi- als[1]. For Ag(I) coordination compounds, short Ag(I) –Ag(I) separations have been found in many bi- and polynuclear complexes[2~4], and these short metal- metal distances have been attributed to the ligand ar- chitecture[5, 6]. Thus, the rational design of bi- and polynuclear Ag(I) complexes must recognize the in- here…     

银掺杂介孔氧化铝抗菌剂的一步合成与表征

以Al(NO_3)_3·9H_2O和AgNO_3为原料,采用水热法制备了介孔氧化铝纳米粒子(Mesoporous Al_2O_3NPs)和银掺杂介孔氧化铝纳米粒子(Mesoporous Ag/Al_2O_3NPs),通过X射线衍射(XRD)、场发射扫描电子显微镜(FE-SEM)、X射线荧光光谱(XRF)、能量分散X射线衍射(EDX)和低温N2吸附-脱附等手段对产物进行了表征,通过最低抑菌浓度和抑菌圈实验研究了材料的抗菌性能.XRD分析表明在介孔Ag/Al_2O_3NPs中Al_2O_3是唯一结晶相,Ag掺杂后,介孔Ag/Al_2O_3NPs晶格常数和半高峰宽增大,晶面间距[(111),(400)和(440)面]减小.FE-SEM形貌分析表明掺杂后的介孔Ag/Al_2O_3NPs颗粒直径减小而孔径增大.EDX和XRF分析表明介孔Ag/Al_2O_3NPs中O/Al摩尔比为1.5,与Al_2O_3NPs中O/Al摩尔比相同.综合XRD和XRF分析结果认为,Ag进入介孔Al_2O_3晶格间隙形成间隙固溶体.低温N2吸附-脱附分析表明掺杂后的介孔Ag/Al_2O_3NPs比表面积、孔体积和孔径增大.曝气抗菌实验结果表明介孔Ag/Al_2O_3NPs的抗菌机理是活性氧和金属银的协同作用.介孔Ag/Al_2O_3NPs对革兰氏阴性菌(大肠杆菌)和革兰氏阳性菌(金黄色葡萄球菌)具有明显的抗菌效果,对大肠杆菌和金黄色葡萄球菌的最低抑菌浓度(MIC)均为80μg/m L,抑菌圈直径分别为26 mm和24 mm.     

Synthesis, Crystal Structure and Photoluminescent Property of a Novel Silver(I) Compound {[Ag(bpp)]_2(Hphth)(NO_3)·(H_2O)_2}_n

Self-assembly of Ag(I) nitrate, 1,3-bis(4-pyridyl)propane (bpp) and phthalic acid monopotassium salt (KHphth) in CH3OH-H2O solution produced the title complex, {[Ag(bpp)]2(Hphth)(NO3)·(H2O)2}n, which was characterized by single-crystal X-ray diffraction, elemental analysis, IR spectrum, and photoluminescent spectrum. Single-crystal X-ray analysis revealed that the complex crystallizes in a monoclinic system, space group P21/c, with a = 15.4174(5), b = 8.6398(2), c = 25.2466(8) , β = 91.072(1)o, V = 3362.34(17) 3, Z = 4, C34H37N5O9Ag2, Mr = 875.43, Dc = 1.729 g/cm3, μ = 1.228 mm-1, F(000) = 1768, the final R = 0.0749 and wR = 0.1580 for 5754 reflections with I > 2σ(I). The Ag atom is coordinated by two N atoms from two bpp molecules in an approximately linear geometry. The Ag(I) ions are linked by the bpp molecules to form one-dimensional zigzag chains propagating along the c axis. The Hphth- and nitrate counter-ions are bridged by solvent water molecules through hydrogen bonds to generate a one-dimensional chain extending along the b axis. Electrostatic interactions between cations and anions, extensive hydrogen bonds and π-π interactions are responsible for the three-dimensional supramolecular structure. In the solid state, the compound exhibits blue photoluminescence with the maximum at 436 nm upon excitation at 344 nm.     

Synthesis,Crystal Structure and Photoluminescence of a Three-coordinate Ag(Ⅰ) Complex

A three-coordinate Ag(I) complex, [Ag(Mepzpy)(PAr3)]BF4·H2O(1, Mepzpy = 3-methyl-1-(2-pyridyl)pyrazole, PAr3 = tri(o-tolyl)phosphine), was synthesized from the reaction of Ag(CH3CN)4BF4, PAr3 and Mepzpy in CH3 CN at room temperature. The compound was characterized by UV-vis, NMR and X-ray single-crystal structure analysis. It crystallizes in triclinic space group P1 with a = 10.2251(5), b = 10.6014(5), c = 15.7012(5) , α = 92.963(3), β = 92.641(3), γ = 114.647(4)o, V = 1540.6(1) 3, Z = 2, Mr = 676.24, Dc = 1.458 g/cm3, F(000) = 688, μ = 6.187 mm-1, GOOF = 1.038, the final R = 0.0530 and w R = 0.1493 for 6371 observed reflections with I 2σ(I). Compound 1 is ionic. It is composed of a BF4- anion and a [Ag(Mepzpy)(PAr3)]+ cation. The Ag(I) ion adopts a distorted trigonal pyramidal coordination geometry defined by two nitrogen atoms and a phosphorous atom. The complex emits blue luminescence with maximum peaks at 470 nm in solid state at room temperature.     

Mild Hydrothermal Synthesis,Crystal Structure and Magnetic Behavior of AgCu(IO_3)_3:a Quasi-one-dimensional S=1/2 Chain Compound

A new complex AgCu(IO_3)_3 is synthesized by mild hydrothermal method and characterized by single-crystal X-ray diffraction and magnetization measurement.AgCu(IO_3)_3 is triclinic,space group P1,with a = 7.3081(1),b = 7.8089(1),c = 8.2447(1) ?,α = 67.159(1),β = 74.982(1),γ = 80.982(1)°,and Z = 2.AgCu(IO_3)_3 is isostructral with Ag Pb(IO3)3.The structure of Ag Cu(IO3)3 consists of CuO_6 chain columns parallel to the c axis,formed by corner-sharing Cu(1) and Cu(2) octahedra and flanked by corner-sharing IO3 groups; these CuO_6 columns are cross-linked into a three-dimensional framework through I–O and Ag–O bonds.I(1),I(2) and I(3) are coordinated respectively with 3 oxygens on the same side to form trigonal pyramids confirming the presence of a stereochemically active lone pair of each I~(5+) cation.In the CuO_6 chain columns,Cu(1)O_6 and Cu(2)O_6 octahedra are tetragonally distorted with four shorter bonds in the square planes and two longer apical bonds.Cu(1)O_6 octahedra were corner sharing with Cu(2)O_6 octahedra with a shorter Cu(1)–O(1) bond in the square planes and a longer apical Cu(2)–O(1) bond,which forms a Cu(1)–Cu(2) magnetic chain along the c direaction.Magnetization measurement shows weak antiferromagnetic property in low temperature range.Ag Cu(IO_3)_3 provides a new example of a quasi-one-dimensional magnetic system.     

Ag(PPh3)nX(n=1,2,3；X=Cl,Br,I)的电化学合成

银配合物;;三苯基膦;电合成;Ag(PPh3)nX(n=1;2;3；X=Cl;Br;I)的电化学合成     

簇合物〔WOS_3 Ag_3 Br(PPh_3)_3〕·(OPPh_3)的合成和晶体结构

报道了〔WOS3Ag3Br(PPh3) 3〕·(OPPh3)簇合物 (C72 H6 0 Ag3BrO2 S3P4W ,Mr=176 4.6 1)单晶的合成和结构。该晶体属于三方晶系 ,空间群为R3 ,晶胞参数 :a =16 .14 0 (3) ,c =2 3 .0 0 3(4) ,V =5 189.4(15 ) 3,μ(MoKα) =3 .2 98mm- 1 ,Z =3 ,F(0 0 0 ) =2 5 98,Dc=1.6 94g/cm3。独立衍射点 2 181,可观察衍射点 195 2 (I≥ 2σ(I) ) ,R =0 .0 496 ,wR =0 .12 48。该晶体由簇合物分子〔WOS3Ag3Br(PPh3) 3〕和以P为中心的扭曲四面体结构的中性分子OPPh3 构成 ,其中的簇合物分子的骨架为由1个W原子、3个S原子、3个Ag原子和 1个Br原子构成的立方烷状。W、O(1)和Br原子位于C3轴上。     

[Ag(H_2O)(H_3PW_(11)O_(39))]~(3–)修饰的TiO_2阳极对水氧化的催化作用研究（英文）

高效的水氧化是实现大规模分解水制氢的瓶颈,开发稳定、经济、高效的水氧化催化剂是引人关注的.早在上世纪中期Ag~+作为水氧化催化剂就有报道,但尚未见Ag~+配合物作为分子基水氧化催化剂的报道.本课题组选择缺位多酸阴离子[H_3PW_(11)O_(39)]~(3-)作为配体,成功研制了银-多酸配合物[H3Ag~Ⅰ(H2O)PW_(11)O_(39)]3-(AgPW_(11))分子基水氧化催化剂,发现其对使用S_2O_8~(2-)化学氧化水具有很好的催化作用,这主要归功于多酸配体在传输电子和质子的作用,对理解催化氧化水的机理有重要学术价值.将分子基催化剂修饰到电极上是实现其电化学催化氧化水的必由之路.本文采用浸渍法将AgPW_(11)修饰到TiO_2电极上,成功制备了AgPW_(11)-TiO_2/ITO电极,并通过XRD,SEM,EDX技术对AgPW_(11)-TiO_2/ITO电极进行了表征.结果表明,AgPW_(11)被成功负载到TiO_2纳米粒子表面,它的引入使得TiO_2电极表面的纳米粒子平均尺寸由10–40 nm增加到15–60 nm.在0.1 mol L~(-1)Na_2SO_4电解质溶液中利用线性扫描伏安、计时电流和电化学阻抗技术研究了AgPW_(11)-TiO_2/ITO阳极催化氧化水的性能,结果发现,当施加偏压大于1.3 V vs.Ag/AgCl时,随电压升高,AgPW_(11)-TiO_2/ITO电极相比TiO_2/ITO电极有更显著的氧化电流;当施加偏压在1.5 V vs.Ag/Ag Cl时,AgPW_(11)-TiO_2/ITO电极氧化电流比TiO_2/ITO电极和AgNO_3-TiO_2/ITO电极分别高出10倍和2.5倍,这归因于AgPW_(11)-TiO_2/ITO电极上电极-电解质界面具有更低的电荷转移阻抗,也说明多酸阴离子配体在催化过程中能够更好地传输电子和质子.在光照条件(100 m W cm~(-2))下,AgPW_(11)-TiO_2/ITO电极有较高的阳极电流,但光电流并没有明显增加,这主要是由于修饰电极光生电子–空穴复合速率较快所致.AgPW_(11)-TiO_2/ITO阳极重复使用15次后,电流密度仍然高出TiO_2/ITO电极3倍以上,表明AgPW_(11)-TiO_2复合电极稳定性较好.在0.1 mol L~(-1)磷酸缓冲溶液体系中研究了AgPW_(11)在不同浓度、不同pH值和不同扫速下的循环伏安曲线.在1.1–1.6 V vs.Ag/AgCl扫描范围和100 mVs~(-1)扫速条件下,在1.23和1.31 V vs.Ag/Ag Cl处出现的一对氧化还原峰,归结为Ag~Ⅰ/Ag ~Ⅱ的1e氧化还原过程.在1.0–1.4 V vs.Ag/AgCl扫描范围内,随扫速由100增至900 m V s~(-1),阴极还原峰电位负移而阳极氧化峰电位正移,导致峰-峰电位差△Ep增加,而且氧化峰电流与还原峰电流与扫速平方根呈线性关系,说明该电极氧化还原过程受扩散控制.对Ag I/Ag ~Ⅱ的氧化还原过程,随着p H值由5.3增加到6.7,氧化还原峰电位负移,并且E_(pc)与pH值呈现线性关系,斜率为–0.08882,根据能斯特方程S=2.303RTm/(αn F),推测转移的质子数为1.由此可知,AgPW_(11)氧化是准可逆的、1电子和1质子转移过程.推测[H_3Ag ~ⅠIH_2O)PW_(11)O_(39)]~(3-)氧化生成的[H_2Ag~Ⅱ(H_2O)PW_(1)1O_(39)]~(3-)可能发生歧化反应,所生成[H3Ag~ⅢOPW_(1)1O_(39)]~(3-)进而氧化水放出氧气.     

Ag(Ⅰ)-phen-TPPS_4水溶液体系中显色反应的研究

本文提出了在碱性介质中,基于Ag(I)-phen-TPPS_4配合物的生成而建立高灵敏度测定Ag(I)的分光光度法。配合物的最大吸收波长为438nm,摩尔吸光系数为136×10~5L.mol~(-1).cm~(-1)。Ag(I)的浓度在0～0.4μg/mL范围内符合比尔定律。Ag(I)的最低检出限为8.8ng/mL。配合物的组成为Ag(I):phen:TPPS_4=1:2:1。方法简便、快速,应用于生产感光乳胶的废水中微量银的测定,获得较满意的结果。     

Li_4Ti_5O_(12)/(Ag+C)极材料的固相合成及电化学性能

以Li_2CO_3,TiO_2为原料,葡萄糖为碳源,采用固相煅烧工艺合成了亚微米级的Li_4Ti_5O_(12)/C复合负极材料.并将之与AgNO_3复合,采用固相方法制备出了Ag表面修饰的Li_4Ti_5O_(12)(AG+C)复合材料.采用XRD、SEM和TEM测试方法对材料的微结构进行了表征.结果表明,C的存在对Ag单质在Li_4Ti_5O_(12)/C颗粒表面的大量形成起到了积极的促进作用.从而很大程度地提高了Li_4Ti_5O_(12)/C的电导率,因此有效地改善了其电化学性能.在1C倍率下,Li_4Ti_5O_(12)/(Ag+C)复合材料的首次放电容量达到了164 mAh·g(-1).     

Syntheses,Structures,and Luminescent Properties of Zinc(Ⅱ) and Silver(Ⅰ) Complexes Based on 1-(4?-Carboxylatobenzyl)-3-(pyrazin-2-yl)pyrazole

Two novel coordination compounds, [Zn(CBPP)2(H2O)2]·3H2O(1) and[Ag(CBPP)·2H2O](2)(HCBPP = 1-(4?-carboxylatobenzyl)-3-(pyrazin-2-yl)pyrazole), were hydrothermally synthesized and characterized. Compound 1 crystallizes in monoclinic, space group C2 with a = 26.221(4), b = 8.4211(7), c = 14.295(3) ?, β = 114.561(8)o, V = 2705.9(2) ?3, Dc = 1.587 g/cm3, C28H28Cl2N8O9 Zn, Mr = 685.97 F(000) = 1416, μ(Mo Kα) = 0.926 mm-1, Z = 4, R = 0.0287, w R = 0.1076 for 2818 observed reflections(I 2σ(I)), and R = 0.0300, w R = 0.1110 for all data. In 1, each deprotonated CBPP-ligand with a bidentate coordination mode connects two Zn(II) atoms to generate a 1D helical chain along the b axis. The adjacent chains intersect with each other through hinged Zn(II) ions to build up an interesting two-dimensional network. Compound 2 crystallizes in monoclinic, space group P21/n with a = 6.3544(1), b = 11.7195(3), c = 19.3188(4) ?, β = 94.297(2)o, V = 1434.64(5) ?3, Dc = 1.894 g/cm3, C14H13 Ag N4O4, Mr = 409.15 F(000) = 816, μ(Mo Kα) = 11.536 mm-1, Z = 4, R = 0.0456 and w R = 0.1184 for 2402 observed reflections(I 2σ(I)), and R = 0.0517, w R = 0.1275 for all data. In 2, each ligand binds two Ag(I) atoms in a tridentate coordination mode to form an infinite zigzag chain. Their thermal and photoluminescent properties were also investigated.     

Synthesis, Crystal Structure and Photoluminescent Property of a Novel Silver(Ⅰ) Compound {[Ag(bpp)]2(Hphth)(NO3)·(H2O)2}n

Self-assembly of Ag(Ⅰ) nitrate, 1,3-bis(4-pyridyl)propane (bpp) and phthalic acid monopotassium salt (KHphth) in CH3OH-H2O solution produced the title complex,{[Ag(bpp)]2(Hphth)(NO3)·(H2O)2}n, which was characterized by single-crystal X-ray diffraction,elemental analysis, IR spectrum, and photoluminescent spectrum. Single-crystal X-ray analysis revealed that the complex crystallizes in a monoclinic system, space group P21/c, with α =15.4174(5), b = 8.6398(2), c = 25.2466(8) (A), β = 91.072(1)°, V = 3362.34(17) (A)3, Z = 4,C34H37N5O9Ag2, Mr = 875.43, Dc = 1.729 g/cm3, μ = 1.228 mm-1, F(000) = 1768, the final R =0.0749 and wR = 0.1580 for 5754 reflections with I ＞ 2σ(I). The Ag atom is coordinated by two N atoms from two bpp molecules in an approximately linear geometry. The Ag(Ⅰ) ions are linked by the bpp molecules to form one-dimensional zigzag chains propagating along the c axis. The Hphth-and nitrate counter-ions are bridged by solvent water molecules through hydrogen bonds to generate a one-dimensional chain extending along the b axis. Electrostatic interactions between cations and anions, extensive hydrogen bonds and π-π interactions are responsible for the three-dimensional supramolecular structure. In the solid state, the compound exhibits blue photoluminescence with the maximum at 436 nm upon excitation at 344 nm.     

Silver(Ⅰ) Complexes with Mixed Diphosphine Ligands:Syntheses,Characterization and Spectroscopic Properties

Two novel silver(I) complexes [Ag(DPEphos)(dppe)]Cl O4(1) and [Ag(DPEphos)-(dppe)]SCN(2)(DPEphos = bis[2-(diphenylphosphino)phenyl]ether, dppe = bis(diphenylphosphino)ethane) are synthesized and characterized by IR, 1H/31 P NMR spectroscopy and fluorescence spectra. Complex 1 crystallizes in monoclinic, space group P21/c with a = 14.8821(12), b = 12.6620(11), c = 36.025(3) ?, β = 112.633(2)°, V = 6265.7(9) ?3, C62H52 Cl O5P4Ag, Mr = 1144.24, Z = 4, Dc = 1.213 g/cm3, F(000) = 2352, μ = 0.510 mm-1, the final R = 0.0616 and w R = 0.1192 for 4003 observed reflections(I 2σ(I)). Complex 2 crystallizes in monoclinic, space group P21/c with a = 14.9021(13), b = 12.6100(11), c = 35.920(3) ?, β = 112.852(2)°, V = 6220.2(9) ?3, C63H52NOP4 SAg, Mr = 1102.87, Z = 4, Dc = 1.178 g/cm3, F(000) = 2272, μ = 0.498 mm-1, the final R = 0.0912 and w R = 0.1706 for 3287 observed reflections(I 2σ(I)). In mono-nuclear complexes 1 and 2, the Ag(I) atom is chelated by DPEphos and dppe ligand. In the 31 P NMR spectra, there are splitting signals(doublets or triplets) which can be attributed to the coupling of the 107,109Ag–31P(from DPEphos or dppe ligand). All the emission peaks of these complexes are attributed to ligand-centered(π-π*) transitions.     

Polynuclear Silver(Ⅰ) Complexes with Phosphorus Ligands and 4,4'-Bipyridine:Synthesis,Structural Characterization and Spectroscopic Properties

Two novel silver(I) complexes {[Ag(OTf)(PPh3)(4,4'-bipy)]}∞(1) and {[Ag2-(OTf)2(dppb)3](CH3CN)4}∞(2)(OTf = trifluoromethanesulfonate, PPh3 = triphenylphophine, 4,4'-bipy = 4,4'-bipyridine, dppb = bis(diphenylphosphino)butane) have been synthesized and characterized by IR, single-crystal X-ray diffraction, fluorescence spectrum and 1H NMR spectroscopy. Complex 1 crystallizes in orthorhombic, space group Pna21 with a = 19.259(2), b = 9.85070(12), c = 16.3827(17) ?, V = 3108.0(5) ?3, C29H23F3N2O3 PSAg, Mr = 675.39, Z = 4, Dc = 1.443 g/cm3, F(000) = 1360, μ = 0.816 mm-1, the final R = 0.0675 and w R = 0.1722 for 3662 observed reflections(I 2σ(I)). Complex 2 crystallizes in triclinic, space group P1 with a = 12.9370(11), b = 13.5261(13), c = 16.4539(15) ?, α = 106.7120(10), β = 97.3830(10), γ = 113.027(2)?, V = 2441.2(4)?3, C94H96F6N4O6P6S2Ag2, Mr = 1957.43, Z = 1, Dc = 1.331 g/cm3, F(000) = 1006, μ = 0.605 mm-1, the final R = 0.0717 and w R = 0.1795 for 5128 observed reflections(I 2σ(I)). Complex 1 is of zigzag chain structure, in which each Ag atom is coordinated by one OTf- anion, two N atoms from two 4,4'-bipy molecules and one P atom from PPh3 ligand. In 2, the central Ag atom is coordinated with one OTf- anion and three P atoms from three dppb ligands, which leads to the formation of a zigzag ring-bridge-ring chain with each ring consisting of two Ag atoms and two dppb ligands.     

Synthesis, Crystal Structure and Photoluminescent Property of a Novel Silver(Ⅰ) Compound {[Ag(bpp)]2(Hphth)(NO3)·(H2O)2}n

Self-assembly of Ag(Ⅰ) nitrate, 1,3-bis(4-pyridyl)propane (bpp) and phthalic acid monopotassium salt (KHphth) in CH3OH-H2O solution produced the title complex,{[Ag(bpp)]2(Hphth)(NO3)·(H2O)2}n, which was characterized by single-crystal X-ray diffraction,elemental analysis, IR spectrum, and photoluminescent spectrum. Single-crystal X-ray analysis revealed that the complex crystallizes in a monoclinic system, space group P21/c, with α =15.4174(5), b = 8.6398(2), c = 25.2466(8) (A), β = 91.072(1)°, V = 3362.34(17) (A)3, Z = 4,C34H37N5O9Ag2, Mr = 875.43, Dc = 1.729 g/cm3, μ = 1.228 mm-1, F(000) = 1768, the final R =0.0749 and wR = 0.1580 for 5754 reflections with I ＞ 2σ(I). The Ag atom is coordinated by two N atoms from two bpp molecules in an approximately linear geometry. The Ag(Ⅰ) ions are linked by the bpp molecules to form one-dimensional zigzag chains propagating along the c axis. The Hphth-and nitrate counter-ions are bridged by solvent water molecules through hydrogen bonds to generate a one-dimensional chain extending along the b axis. Electrostatic interactions between cations and anions, extensive hydrogen bonds and π-π interactions are responsible for the three-dimensional supramolecular structure. In the solid state, the compound exhibits blue photoluminescence with the maximum at 436 nm upon excitation at 344 nm.     

Dy_(2)O_(3),Cu_(2)O在LiF-DyF_(3)熔盐体系的溶解度研究EI北大核心CSCD

以LiF-DyF_(3)为熔盐,电解Dy_(2)O_(3),Cu_(2)O制备Dy-Cu合金过程中,明确Dy_(2)O_(3),Cu_(2)O溶解度是制定合理加料制度、提高电解效率的关键。采用等温饱和法研究了Dy_(2)O_(3),Cu_(2)O溶解平衡时间,考察了温度、DyF_(3)浓度对单一氧化物(Dy_(2)O_(3)或Cu_(2)O)及混合氧化物(Dy_(2)O_(3)与Cu_(2)O)溶解度的影响,通过最小二乘法对溶解度数据进行了拟合,建立了温度、DyF_(3)浓度与Dy_(2)O_(3),Cu_(2)O溶解度之间的数学回归方程。研究结果表明,Dy_(2)O_(3),Cu_(2)O在LiF-DyF_(3)熔盐中溶解平衡的时间分别为110,120 min,溶解反应为吸热反应。相同温度下,随熔盐中DyF_(3)浓度增大,Dy_(2)O_(3)的溶解度逐渐增大,Cu_(2)O溶解度变化较小;在温度为910~1030℃,熔盐中DyF_(3)浓度为15%~40%(摩尔分数)时,Dy_(2)O_(3),Cu_(2)O溶解度分别为0.55%~3.45%,0.39%~0.52%。     

Syntheses and Crystal Structures of Two New Ag(Ⅰ) Complexes with Betaine Derivative: Structure Changes via Metal-to-ligand Ratio

Two new Ag(I) complexes {Ag2(L)(NO3)(H2O)}n(1) and {Ag(L)}n·nH2O(2) have been synthesized via the reaction of silver nitrate and betaine derivative 1-carboxymethylpyridinium-3-carboxylate(L) by only changing the metal-to-ligand ratio. The results of X-ray crystallographic analysis indicate that complexes 1 and 2 both crystallize in the monoclinic space group P21/c with a = 5.0809(14), b = 17.390(5), c = 13.399(4), β = 91.677(5)o, V = 1183.4(6)3, Z = 4, Mr = 475.90, Dc = 2.671 g/cm3, F(000) = 912, μ = 3.352 mm-1, S = 1.259, the final R = 0.0320 and wR = 0.0831 for 2036 observed reflections with I 2σ(I) for 1 and a = 12.180(2), b = 5.0283(10), c = 14.396(3), β = 94.87(3)o, V = 878.5(3)3, Z = 4, Mr = 306.02, Dc = 2.314 g/cm3, F(000) = 600, μ = 2.294 mm-1, S = 1.053, the final R = 0.0283 and wR = 0.0684 for 2011 observed reflections with I 2σ(I) for 2. Complexes 1 and 2 both feature a unique 2D structure. For 1, the 2D undulated network consists of 1D infinite helical chains running parallel to the b axis, while for 2, the 2D network is made up of 1D tubes along the b axis. Moreover, the Ag…Ag interactions in complexes 1 and 2 are also discussed.