含双(苯硫基)甲烷的聚丙烯腈静电纺纳米纤维的制备与测试

将双(苯硫基)甲烷加入聚丙烯腈纺丝液中,利用静电纺丝技术制得纳米纤维膜。通过对纤维的直径、纤维的形貌、热收缩性、耐酸碱行等测试筛选出较佳浓度,分析其结构变化。结果表明:双(苯硫基)甲烷的较佳用量为3wt%,其加入不改变纺丝液的表面张力和电导率。纺得的纤维直径较小,双(苯硫基)甲烷串珠能较好的镶嵌在聚丙烯腈纳米纤维上。纤维膜的耐热提升19%、耐酸碱性和离子电导率提高。

SYNTHESIS AND STRUCTURE OF HEXAKIS CDI-μ-(4-CHLORO-BENZYLTHIO ) NICKEL ] TRITETRACHLOROMETHANE SOL-VATE, [Ni(SCH_2C_6H_4Cl-p)_2]_6 · 3CC1_4

C_(86)H_(72)Cl_(20)Ni_6S_(12) , Mr = 2551. 62, monoclinic, space group C2/c, crystal data: a = 30. 322(5), b=14. 168(3), c=26. 453(4) A ,β=101. 00(4)°, V = 11155. 6 A3, Z=4, Dx=1. 519 g/cm3, λ(MoKα) = 0. 71069 A ,μ=17. 370 cm-1, F(000) = 5152, T = 293 K, final R = 0. 078, Rw = 0. 086 for 5610 (I>3σ(I)) reflections. The crystal is composed of discrete [Ni (SCH2C6H4Cl-p)2]6 and CCl4 solvent molecules. The coordination geometries of the Ni atoms are perfect planes sharing S...S edges. The six NiS4 squares are linked with each other forming a hexagonal prism. The p-ClC6H4CH2S- side chains in the molecule are arranged in the axial and equatorial positions alternately with respect to the pseudo-hexagonal axis of the molecule.

Structural Studies of [V_2S_6O_2(CuPPh_3)_4(CuMeCN)_2]·2CH_2Cl_2·2PrOH

The title V-Cu-S heterometallic cluster compound C84 H86Cl4Cu6N2O4P4S6V2, crystallizes in the monoclinic space group P21/n with a=16.381(5), b=17.114(3),c=16.749(6) A,β=107. 04(3)°,V=4490(2)A3, Mr=2128.84,Z=2,Dc=1. 57 g/cm3,μ= 19. 6 cm-1,F(000)=2160. Final R=0.074(Rw=0.082) for 2662 unique reflections with I≥3σ(I). The V atom in the compound retains the tetrahedral geometry of the VS3O with S-V-S or S-V-O angles of 108.6(6)～110.3 (6)°.The cluster core [V2Cu6S6O2] of the compound can be regarded as two cluster cores [VCu3S3O] bonded by bondings of the Cu-Cu'(distances of 2.774(3)～2.707(5) A) and Cu-S (distances of 2.463(7)～2.396(9) A) with centrosymmetric. Atoms of the cluster core V2Cu6 form a distorted cube with the Cu Cu'or the V-Cu distances of 2. 774(3)～2. 707(5) A.

电子束辐射技术降解水中的致臭底物

介绍了一种能有效清除水溶液中苯硫基甲烷(甲基苯基硫化物,CH3S-C6H5)的新型电子束放射工艺,以及pH值为5和9时的底物破坏数据。应用能预测清除效率的动力学模型,采用脉冲辐解技术测定了苯硫基甲烷与羟基自由基、水合电子和氢原子反应的总速度常数,其值分别为(9.90±0.13)×109、(3.1±0.1)×108和(3.24±0.08)×109L/(mol·s)。比较模型预测值和试验结果可知,pH值为5时结果一致,而pH值为9时清除率会被高估。认为pH值为9时出现的其他与羟基自由基、水合电子和氢原子发生反应的净化剂是造成清除效率下降的原因,而pH值为5时不会出现这种情况。