混合型杂多化合物Mx[GaW9M3O40]·nH2O的合成和性质

本文报道了M_x[GaW₉M₃^′O₄₀]nH₂O(M′=Mo,V,Ti,Fe(Ⅲ),Co(Ⅱ),Ni(Ⅱ),Mn(Ⅱ);M=k,Na,Gua,Me₄N,Et₄N,Bu₄N)的合成。通过元素分析,阴离子电荷的确定,极谱、IR及UV光谱、可见光谱、ESR、磁化率测定对其进行了表征。并研究了它们在水溶液中对酸碱的稳定性     

流动注射化学发光免疫分析检测猪肉中的盐酸克伦特罗残留

设计了一种快速检测猪肉中盐酸克伦特罗的流动注射-化学发光免疫分析方法.采用过氧化脲作为luminol-CH<,4>N<,2>O·H<,2>O<,2>-HRP化学发光体系氧化剂,联苯硼酸作为增强剂,流动注射化学发光法检测竞争免疫反应后的上清酶标复合物.在最优条件下,测定克伦特罗的线性范围0.05～9μg/L(r=0.99...     

新颖的(4,4’-bipy){[Ag(4,4’-bipy)]3[PMo12ⅥO40]}·H2O三维超分子多金属氧酸盐的合成和晶体结构

利用H3PMo12O40·4H2O, 4,4’-bipy和AgNO3反应, 在中温水热条件下合成了一种新颖的三维超分子多金属氧酸盐 (4,4’-bipy){[Ag(4,4’-bipy)]3[PMo12ⅥO40]}·H2O(1), 并通过元素分析、红外光谱、热重分析和X射线单晶衍射对其结构进行了表征. 结果表明, 该化合物属三斜晶系, P1空间群, 晶胞参数a=1.1275(2) nm, b=1.1910(2) nm, c =1.2898(3) nm, α = 112.63(3)°, β=94.63(3)°, γ=99.53(3)°, V=1.5567(5) nm3, Z=1. 该化合物具有三维超分子结构及荧光性质.     

有机-无机复合磷钨酸盐[HTA]3[α-PW12O40]·6H2O的合成与晶体结构（英文）

利用CuCl2·2H2O,1,2,4-三氮唑(TA),L-丝氨酸与Na3[α-PW12O40]·6H2O在乙醇的水溶液中合成了一种有机-无机复合Keggin结构磷钨酸盐[HTA]3[α-PW12O40]·6H2O;利用红外光谱和X射线单晶衍射表征了合成产物的结构,利用元素分析测定了其组成.结果表明,标题化合物属于菱方晶系R-3空间群,晶胞参数为:a=1.793 73(12)nm,b=1.793 73(12)nm,c=2.440 7(3)nm,α=β=90°,γ=120°,Z=6,V=6.800 7(11)nm3,Dc=4.682g·cm-3,GOOF=1.079,R1=0.051 6,wR2=0.137 4.就分子结构而言,标题化合物分子由一个饱和Keggin结构多阴离子[α-PW12O40]3-,三个游离的质子化[HTA]+阳离子和六个结晶水分子组成.     

新颖的（4,4′-bipy）{[Ag（4,4′-bipy）]3&#183;[PMo12^ⅥO40]}&#183;H2O三维超分子多金属氧酸盐的合成和晶体结构

利用H3PMo12O40.4H2O,4,4′-bipy和AgNO3反应,在中温水热条件下合成了一种新颖的三维超分子多金属氧酸盐（4,4′-bipy）{[Ag（4,4′-bipy）]3[PMo12^ⅥO40]}.H2O（1）,并通过元素分析、红外光谱、热重分析和X射线单晶衍射对其结构进行了表征.结果表明,该化合物属三斜晶系,P^-1空间群,晶胞参数a=1.1275（2）nm,b=1.1910（2）nm,c=1.2898（3）nm,α=112.63（3）&#176;,β=94.63（3）&#176;,γ=99.53（3）&#176;,V=1.5567（5）nm^3,Z=1.该化合物具有三维超分子结构及荧光性质.     

有机-无机复合磷钨酸盐[HTA]_3[α-PW_(12)O_(40)]·6H_2O的合成与晶体结构(英文)

利用CuCl2·2H2O,1,2,4-三氮唑(TA),L-丝氨酸与Na3[α-PW12O40]·6H2O在乙醇的水溶液中合成了一种有机-无机复合Keggin结构磷钨酸盐[HTA]3[α-PW12O40]·6H2O;利用红外光谱和X射线单晶衍射表征了合成产物的结构,利用元素分析测定了其组成.结果表明,标题化合物属于菱方晶系R-3空间群,晶胞参数为:a=1.793 73(12)nm,b=1.793 73(12)nm,c=2.440 7(3)nm,α=β=90°,γ=120°,Z=6,V=6.800 7(11)nm3,Dc=4.682g·cm-3,GOOF=1.079,R1=0.051 6,wR2=0.137 4.就分子结构而言,标题化合物分子由一个饱和Keggin结构多阴离子[α-PW12O40]3-,三个游离的质子化[HTA]+阳离子和六个结晶水分子组成.     

一个新的三维超分子配位聚合物[Ni（pyridine-2-carboxylate）2]n&#183;2nH2O的水热合成及晶体结构

采用水热法合成了一个新的金属-有机配位聚合物[Ni（pyridine-2-carboxylate）2]n.2nH2O,对其进行元素分析、红外光谱和X射线单晶衍射测定.结构分析表明：该晶体属于三斜晶系,P-1空间群,晶胞参数a=5.1284（6）nm,b=7.6346（9）nm,c=9.2295（11）nm,α=74.902（2）&#176;,β=84.347（2）&#176;,γ=71.442（2）&#176;,V=330.70（7）nm3,化学式为C12H12NiN2O6,Mr=338.95,Dc=1.702g/cm3,μ（Mo,Kα）=1.497mm-1,F（000）=174,Z=1,R=0.0333,wR=0.0384（（I〉2σ（I））.并且该配合物通过O—H…O和C—H…O氢键形成了三维超分子网状结构.     

六亚甲基四胺锑(Ⅲ)、铋(Ⅲ)配合物的固相合成与表征

通过固相反应,合成了新的配合物六亚甲基四胺锑(Ⅲ)、铋(Ⅲ):SbCl3(C6H12N4)2·H2O(1)、BiCl3(C6H12N4)2·H2O(2).经元素分析、X 射线粉末衍射、远红外光谱和差热 热重分析进行表征,确定了配合物的组成和结构.对XRD谱指标化,确定其晶系和晶胞参数.SbCl3(C6H12N4)2·H2O(1):a=1.2490nm,b=1.4583nm,c=1.6870nm,β=91.78°,V=3.0706nm3;BiCl3(C6H12N4)2·H2O(2):a=1.3250nm,b=1.3889nm,c=1.7449nm,β=98.94°,V=3.1725nm3.     

有机金属衍生物α，β-［(RSn)3GeW9O37］7-的合成与性质研究

本文报道了α，β-M₄H₃［(RSn)₃GeW₉O₃₇］·nH₂O(M=Bu₄N⁺, Me₄N⁺; R=Bu, Ph)杂多配合物的合成、表征及催化性能研究、元素分析、红外光谱和紫外光谱、¹H、¹¹⁹Sn和¹⁸³W核磁共振谱、激光飞行时间(TOF)质谱和极谱数据表明，这些新化合物为三取代的Keggin结构，三个(RSn)³⁺属不同的M₃O₁₃单元并且彼此共角相连，标题杂多化合物主要以单体形式存在且对烯烃环氧化反应具有催化活性。     

(enH2)5[(VO)12O6B18O36(OH)6]·2(H3O)·6H2O的水热合成和晶体结构

以NH4VO3,H3BO3,乙二胺,MoO3,H2O为原料,按物质的量比2∶20∶9∶3∶222,在180℃条件下晶化,得到黑色棱形晶体(enH2)5[(VO)12O6B18O36(OH)6].2(H3O).6H2O.单晶结构分析结果表明该化合物属三斜晶系,Pī空间群,晶胞参数a=1.336 8(3)nm,b=1.599 8(3)nm,c=1.663 4(3)nm,α=94.040(1)°,β=91.530(1)°,γ=95.830(1)°,V=3.528 1(12)nm3,Z=2,Dc=2.099 g/cm3,μ=1.649 mm-1,F(000)=2 228,15 641个可观察独立衍射点射点(I>2σ(I)),最后结构精修到偏离因子R1=0.047 5,wR2=0.150 4,S=1.039.该化合物的结构主要由阴离子簇[(VO)12O6B18O36(OH)6]12-构成.该阴离子簇由B18O36(OH)6十八元环夹在两个以共边交替相连形成的V6O18簇中间,通过共用氧原子形成三明治式结构新颖的硼-钒-氧离子簇,簇间填充了一些(enH2)2+离子和水分子.     

COPPER-CATALYSED REARRANGEMENT OF 4-SUBSTITUTED-2,3-1H-BENZOXAZINE-1-THIONES

Abstract

4-Substituted-2,3-1H-benzoxazine-1-thiones were prepared by the treatment of the corresponding benzoxazine-1-ones with P₂S₅. The thermal rearrangement of 4-substituted-2.3-1H-benzoxazine-1-thiones, catalysed by metallic copper, yielded 4-substituted-2.3-1 H-benzthiazine-1-ones.     

(±)-Pauciflorol F的全合成

首次完成了(±)-pauciflorol F 的全合成, 其中关键步骤为一步完成Heck反应和烯丙羟基的氧化.     

凤尾蕨科植物中倍半萜类成分的研究进展(Ⅱ)(续完)--1H-茚-1-酮类倍半萜的化学合成、化学转化及生物活性

综述了凤尾蕨科植物中分离得到的1H 茚 1 酮类倍半萜的化学合成、化学转化、生物活性以及1 茚酮倍半萜的二聚体化合物和三环1 茚 1 酮倍半萜等方面的研究情况.     

1-甲基-1-乙氧基-1-烷硫基甲烷类化合物的合成研究

本文以乙缩醛和烷基硫醇为原料,在30－35℃于四氯化碳中反应20min左右,分别合成1－甲基－1－乙氧基－1－烷硫基甲烷,经红外光谱,质谱以及核磁共振谱检测,确证了产物结构。     

高压芒刺静电场对小鼠LFA-1和ICAM-1表达的影响

采用不同电压高压芒刺静电场对小鼠进行全身辐射,荧光免疫流式细胞术检测蛋白表达量的变化.通过时程/量效研究不同电压高压芒刺静电场对细胞表面分子LFA-1和ICAM-1的影响.剂量效应结果表明,LFA-1和ICAM-1在10～20 kV之间处理组的表达量明显高于对照组（P＜0.01）;在30 kV以上电压表达量明显降低（P＜0.05）;时间进程研究结果表明,处理后2 h开始实验组表达量与对照组相比差异显著,一直持续到24 h.不同电压高压芒刺静电场可引起ICAM-1和LFA-1不同的生物效应,二者的相互作用在免疫调节反应中发挥重要功能.     

Synthesis and Antiproliferative Activity of Some 1H-Isochromen-1-ones and Their Thio Analogues

A series of 1H-isochromen-1-one derivatives and their thio analogues were synthesized by thionation using Lawesson's reagent for evaluation of their cytotoxic effect on cancer cells. The effect of these derivatives was tested on the growth of human epidermoid carcinoma A431 cell line by MTT [3-(4, 5-dimethylthiazol-2-yl)-2, 5-diphenyltetrazolium bromide] colorimetric assay. MTT assay revealed that these new compounds are potent inhibitors of cell growth.

Supplemental materials are available for this article. Go to the publisher's online edition of Phosphorus, Sulfur, and Silicon and the Related Elements to view the free supplemental file.     

Synthesis of 1-Tetrazolylalkan-2-amines and -carbamates

A novel method for the synthesis of 1-tetrazolylalkan-2-amines and -carbamates via tert-butyl aziridine-1-carboxylates is described.     

有机五价碘氧化试剂

介绍了最近几年有关五价碘氧化试剂在有机合成中应用的研究进展,主要从合成、应用、机理方面进行了阐述。     

Conformational rivalry of geminal substituents in silacyclohexane derivatives: 1-Phenyl vs. 1-OR,R=H or Me

Molecular structure and conformational equilibria of 1-methoxy- 1 and 1-hydroxy-1-phenylsilacyclohexanes 2 were studied by quantum chemical (QC) calculations and combined gas electron diffraction/mass spectrometry (GED/MS). Both molecules may exist in 5 or 6 forms, differing from each other by the substituents' position: (i) axial or equatorial and (ii) rotational orientation relative to the six-membered ring frame. The contribution of axial forms of both compounds varies from 35 to 60% depending on the theoretical method applied. From the GED data, the summarized molar fractions of the conformers were found to be Ph_ax:Ph_eq = 70(15):30(20) and 50(20):50(20)% which corresponds to ΔG = G_ax–G_eq = ?0.55(46) and 0.00(56) kcal/mol, for compound 1 and 2, respectively. The concentration of the Ph_ax forms of 1-phenyl-1-(X)-silacyclohexanes (X = H, HO, Me, MeO and Me₂N) increases with the size of the second substituent at the silicon atom: 38(10)<50(20)<58(15)<70(15) <80(15)%.     

Excess Molar Volumes for Binary Mixtures of 1-Alkanol and 1-Alkene. III. The System 1-Hexanol + 1-Alkene at 25°C

Excess molar volumes, V ^E, are reported for binary mixtures of 1-hexanol with the homologous C₆, C₇, C₈, and C₁₀ 1-alkenes at 25°C. In this series of mixtures, the V ^E values vary as a function of mole fraction from positive–negative sigmoid shaped curves exhibiting a very small positive lobe in the dilute alkanol region for the shortest chain 1-alkene to positive values over the whole concentration range for the longer chain 1-alkene. The partial molar excess volumes, V _i ^E, were calculated for the components over the whole concentration range. The partial molar volume of 1-hexanol in the 1-hexene system shows a large and sharp minimum and in the 1-decene system is positive over the whole concentration range. The modified model [Treszczanowicz et al., J. Solution Chem. 31, 455 (2002) originally proposed by Treszczanowicz and Benson Fluid Phase Equilibr. 23, 117 (1985)] was used for the interpretation and prediction of the reported data. The model describes qualitatively the variation of V ^E with the length of the molecule and concentration as a result of superposition of the contributions of association, free volume, and nonspecific interactions.