一维锯齿状化合物[(en)_2(Mo_6O_(20)H_4)]_n的水热合成及晶体结构

利用Na2MoO4·2H2O,MoO3,乙二胺,和H2O通过水热合成法合成了一维锯齿状化合物[(en)2(Mo6O20H4)]n.晶体解析表明,该化合物属于单斜晶系,P21/n空间群,a=0.80680(16)nm,b=1.4371(3)nm,c=0.88874(18)nm,β=97.89(3)°,V=1.0207(4)nm3,Z=2,Dc=3.305Mg·m-3,μ=3.681mm-1,F(000)=960.该化合物结构单元由二个游离的乙二胺分子和一个阴离子Mo6O4-20阴离子中,六20构成.在Mo6O4-个钼原子和八个相邻的氧原子构成两个八员环,在每个八员环的两侧分别存在着一个与三个钼原子相连的桥氧.     

3-{2-([5,6]-咪唑-1,10-邻菲咯啉)]}-3′-甲酸-2,2’-联吡啶的合成和晶体结构

以1,10-邻菲咯啉为原料,经三步反应生成了标题化合物,化合物经1H NMR,MS和X-射线单晶衍射表征.结果表明,化合物晶体为单斜晶系,空间群,P21/c,a=1.24828(16)nm,b=1.18534(15)nm,c=1.37542(16)nm,α=90.00°,β=109.268(4)°,γ=90.00°,V=1.9211(4)nm3,Z=4,Mr=418.41,Dc=1.440g.cm-3,μ=0.097mm-1,F(000)=856,R1=0.0633,wR2=0.1803.CCDC:728109.     

[Co（bim）x]配合物修饰的｛P2Mo5O23｝超分子的合成、晶体结构和电化学性质

利用水热技术合成了一种新型[Co(bim)x]配合物修饰的磷钼多金属氧酸盐超分子化合物[Co(bim)3] [Co(Hbim)2( H2 O) P2 Mo5 O23]·5H2O.通过元素分析、红外光谱、热重分析和X射线单晶衍射对化合物进行了表征.化合物属于单斜晶系,P2(1)空间群;晶胞参数:a=11.505 (2) nm,b=19.123 (3) nm,c=13.852(2) nm,α=90.00°,β=100.073(2)°,γ=90.00°,V=3 000.6(8)nm3,F(000)=1 756.0,Z=2.并测试了合成化合物的电化学性质.     

Dawson结构α-H_6P_2W_(18)O_(62)·3(CH_3)_2NH·H_2O的合成、表征和晶体结构(英文)

由二甲胺与H6P2W18O62·nH2O合成了电荷转移化合物α H6P2W18O62·3(CH3)2NH·H2O.单晶结构解析结果表明晶体属单斜晶系,空间群为P21／c,晶胞参数:a=1.2964(3)nm,b=1.3621(3)nm,c=4.1559(8)nm,β=90.02(3)°,V=7.338(3)nm3,Z=4.标题化合物具有可逆光色性.热分析表明,化合物阴离子在430.5℃左右分解.     

Dawson结构α-H6P2W18O62·3(CH3)2NH·H2O的合成、表征和晶体结构

由二甲胺与H6P2W18O62·nH2O合成了电荷转移化合物α-H6P2W18O62·3(CH3)2NH·H2O.单晶结构解析结果表明晶体属单斜晶系,空间群为P21/c,晶胞参数a=1.2964(3)nm,b=1.3621(3)nm,c=4.155 9(8)nm,β=90.02(3)°,V=7.338(3)nm3,Z=4.标题化合物具有可逆光色性.热分析表明,化合物阴离子在430.5℃左右分解.     

Anderson-B-型多金属氧酸盐[Co(2,2''-bipy)3]H-[Al(OH)6(Mo6O18)]·5H2O的合成及晶体结构

以AlCl3·6H2O、Na2MoO4·2H2O、CoCl2·6H2O和2,2'-联吡啶为主要原料合成了Anderson-B-型多金属氧酸盐[Co(2,2'-bipy)3]H[Al(OH)6(Mo6O18)]·5H2O,进行了红外光谱、紫外光谱、差热分析和单晶结构测定.晶体学测定结果表明,化合物属于三斜晶系,Pi空间群,晶胞参数:a=1.216 0(2),b=1.221 5(2),c=1.780 0(4)nm,α=86.83(3)°,β=88.76(3)°,γ=89.82(3)°,V=2.639 4(9)nm3,Z=2,R1=0.079 4,wR2=0.176 6.化合物结构分析表明,在晶体学上,标题化合物分子是由1个[Co(2,2'-bipy)3]2+配阳离子,1个H+离子,2个1/2[Al(OH)6(Mo6O18)]3-多阴离子和5个结晶水分子组成.多阴离子[Al(OH)6(Mo6-O18)]3-借助水分子和金属配离子通过超分子作用形成二维网状结构,网状结构之间又借助超分子作用形成三维无限伸展结构.差热分析表明,标题化合物的失重过程分为2步,多阴离子骨架破坏温度为547.5℃.     

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.     

Dawson结构 [(HOCH_2CH_2)_2NH_2]_6·P_2W_(18)O_(62)·6H_2O的合成、表征、晶体结构

由二乙醇胺与H6P2W18O62·nH2O合成了[(HOCH2CH2)2NH2]6·P2W18O62·6H2O(I).单晶结构解析结果表明晶体属三方晶系,空间群为R-3,晶胞参数:a=b=c=1.36298(16)nm,α=β=γ=106.490(17)°,Z=1,V=2.1374(4)nm3,R=0.0837,Rw=0.2219.化合物分子由一个P2W18O626 阴离子、六个质子化的二乙醇胺、六个结晶水组成.标题化合物具有可逆光色性.热分析表明,化合物阴离子在463℃左右分解.     

新型无机-有机杂化化合物(Hmorph)_4[SiMo_(12)O_(40)]·2H_2O合成与性质研究

合成了1种无机-有机杂化钼酸盐化合物(Hmorph)4[SiMo12O40]·2H2O(Hmorph=morpholine,吗啉).用元素分析、X射线单晶衍射、红外光谱和热重对晶体的结构进行了表征.该晶体属于三斜晶系,P-1空间群,晶胞参数a=1.214 71(13)nm,b=1.399 0(3)nm,c=1.735 1(2)nm,α=79.892(13)°,β=82.719(9)°,γ=71.812(14)°,V=2.749 7(7)nm3,Z=2.在该化合物晶体结构中包含质子化的吗啉分子、带负电荷的Keggin结构多阴离子簇以及水分子,在分子中通过静电引力及氢键作用交替排列.紫外光谱和电化学实验证明,标题化合物(Hmorph)4[SiMo12O40]·2H2O在水溶液中对ClO3-具有良好的电催化性质.     

八钼酸根阴离子有机胺化合物的合成与结构

由MoO3和(CH3)3N或(C2H5)3N反应合成了两种分子组成分别为[(CH3)3NH]4Mo8O26·2H2O(1)和[(C2H5)3NH]4Mo8O26·2H2O(2)的化合物.单晶X衍射结构分析表明,化合物(1)属三斜晶系,空间群为P1,晶胞参数a=1.0500(2)nm,b=1.0533(2)nm,c=1.0765(2)nm,α=100.21(3)°,β=101.93(3)°,γ=118.47(3)°,V=0.9698(3)nm3,R1=0.0524.化合物(2)属单斜晶系,空间群为P21,晶胞参数a=1.1512(2)nm,b=1.3097(3)nm,c=1.7610(4)nm,β=101.40(3)°,V=2.6028(9)nm3,R=0.0428.结构分析表明,两种化合物中Mo8O264-阴离子均发生畸变,有机阳离子增大,Mo-O键键长缩短,阴离子畸变增大.     

The synthesis of [1]benzothieno[2,3-c]quinolines, [1]benzothieno[2,3-c][1,2,4]triazolo[4,3-a]quinoline,and [1]benzothieno[2,3-c]tetrazolo[1,5-a]quinoline

Photocyclization of 3-chloro-N-phenylbenzo[b]thiophene-2-carboxamide 10 afforded [1]benzothieno[2,3-c]-quinolin-6(5H)-one 11 which was chlorinated to 6-chloro[1]benzothieno[2,3-c]quinoline 12 followed by dechlorination to give [1]benzothieno[2,3-c]quinoline 5 . A series of 6-substituted alkoxy and thioalkoxy[1]benzothieno[2,3-c]quinoline derivatives were prepared along with the N-methyl quaternary salt 13 of 5 . 6-Chloro[1]-benzothieno[2,3-c]quinoline 12 was converted into 6-hydrazino[1]benzothieno[2,3-c]quinoline 23 which upon treatment with formic acid yielded [1]benzothieno[2,3-c][1,2,4]triazolo[4,3-a]quinoline 6 . Treatment of 23 with nitrous acid resulted in [1]benzothieno[2,3-c]tetrazolo[1,5-a]quinoline 7 . Compounds 6 and 7 are novel heterocyclic ring systems.     

New [g]-fused [1,2,4]triazolo[1,5-c]pyrimidines: Synthesis of pyrido[3,2-e] and [4,3-e][1,2,4]triazolo[1,5-c]pyrimidine,pyrimido[5,4-e][1,2,4]triazolo[1,5-c]pyrimidine and [1,2,4]triazolo[1,5-c]pteridine derivatives

A number of 2-aryl-substituted pyrido[3,2-e] and [4,3-e][1,2,4]triazolo[1,5-c]pyrimidines and [1,2,4]triazolo[1,5-c]pteridines 11,12a,b,e , their corresponding 5-carbonyl derivatives 7,8a,b,e and some pyrimido[5,4-e][1,2,4]triazolo[1,5-c]pyrimidin-5-ones 7,8c,d have been synthesized, according to different pathways. The new tricyclic heterocycles were prepared with the aim of studying their possible benzodiazepine receptors affinity.     

Synthesis and characterization of [1,2,5]chalcogenazolo[3,4-f]benzo[1,2,3]triazole and [1,2,3]triazolo[3,4-g]quinoxaline derivatives

The synthesis and characterization is reported of low bandgap [1,2,5]chalcogenazolo[3,4-f]benzo[1,2,3]triazole and [1,2,3]triazolo[3,4-g]quinoxaline derivatives that display higher solubility and stability then their thiadiazole counterparts, [1,2,5]chalcogenazolo[3,4-f]benzo[2,1,3]thiadiazole and [1,2,5]thiadiazolo[3,4-g]quinoxaline, respectively.     

[1.1.1.1.1]paracyclophane and [1.1.1.1.1.1]paracyclophane

The first syntheses of [1.1.1.1.1]paracyclophane ($\text{1}$) and [1.1.1.1.1.1]paracyclophane ($\text{2}$) are described, featuring a trifluoroacetic acid promoted Friedel-Crafts cycloalkylation as the final step.     

Helic[6]arene-Based Chiral Pseudo[1]rotaxanes and [1]Rotaxanes

Chiral pseudo[1]rotaxanes and [1]rotaxanes constructed from macrocyclic arenes still remain a big challenge mainly owing to the lack of such chiral macrocycles. In this work, a new system of chiral pseudo[1]rotaxanes formed by self-inclusion of helic[6]arene containing amide linked with the terminal tertiary amines was first discovered. Based on an atom-economic stopping strategy, a pair of chiral [1]rotaxanes were conveniently obtained in almost quantitative yields by blocking the pseudo[1]rotaxanes with monobenzyl bromide of tetraphenylethene. The structures of pseudo[1]rotaxanes and [1]rotaxanes were characterized by 2D NMR spectra in solution, combined with DFT calculations. The photophysical properties further revealed the efficient chirality transfer of helic[6]arene to the tetraphenylethene moiety, compared to their unthreaded chiral isomers. The discovery of the chiral pseudo[1]rotaxanes allows for a wide and available synthesis of chiral [1]rotaxanes, and also opening a new avenue to the design of chiral supramolecular materials.