碳纳米管-聚(3',4'-亚乙基二氧-2,2':5',2"-三噻吩)复合材料的制备及其电化学性能研究

通过Stille反应合成了3',4'-亚乙基二氧-2,2':5',2"-三噻吩(TET),并以其作为单体,采用化学氧化原位聚合方法在碳纳米管(CNT)的表面包覆新型聚(3',4'-亚乙基二氧.2,2':5',2"-三噻吩)(FTET),制备了PTET-CNT纳米复合材料.通过TEM、SEM和IR对其进行了表征,并利用循环伏安、交流阻抗、恒电流充放电等电化学测试方法,比较研究了复合材料以及碳纳米管在0.1 mol/L四乙基四氟硼酸铵(Et_4NPF_4)的乙腈溶液中的电化学行为.实验结果表明,在电流密度为3 mA/cm~2时,PTET-CNT复合材料的比电容为86 F/g,比原碳纳米管比电容20 F/g提高了3.3倍.基于这种复合材料的电容器的能量密度达到2.02 Wh/kg.     

First Total Synthesis of (-)-4-O-(6'-hydroxy-7'(9')-dehydro-6',7'-dihydrogeranyl)-coniferyl Alcohol

SomeLigulariaspecieshavelongbeenusedasfolkremediesduetotheirantibiotic,antiphlogisticandantitumoracti.ities'.Compound1',anovelconiferylalcoho1,wasisolatedfromLigulariaduciformis(Compsitae)alongwiththreenewstructuressuchas2,3,4(Figure1).Thegeometricalstructureof1,deterndnedbyspectroscopictechniques,correspondedto4-o-(6'-hydroxy-7'(9')-dehydro-6coniferylalcohol.ButitsabsoluteconfigurationatC-6'hasnotyetbeendetermined.Hereinwereportthetotalsynthesisof(6'S)-(-)-lfromgeraniol5throughninesteps(Sc…     

N,N-二(4'-对苯基-2,2'∶6',2″-三联吡啶)-4,13-二氮杂-18-冠-6醚的合成及其光学性能

以Pd(OAc)2/PBut3为催化剂,4'-(对溴苯基)-2,2'∶6',2″-三联吡啶与二氮杂-18-冠-6经取代反应合成了新化合物N,N-二(4'-对苯基-2,2'∶6',2″-三联吡啶)-4,13-二氮杂-18-冠-6-醚(4),收率58.8%,其结构经1H NMR,13C NMR和FT-IR表征。利用紫外光谱和荧光发射光谱研究了4的光学性能,结果表明:4在甲醇中的最大紫外吸收位于358 nm;在350 nm激发波长激发下,4在二氯甲烷中的最大荧光发射峰位于458 nm。     

2,2'-二(对胺苯甲酯)-1,1'联萘的核磁共振谱解析

利用~1HNMR,~(13)CNMR谱研究了2,2’-二(对胺苯甲酯)-1,1’联萘的结构,并通过~1H-~1HCOSY,~(13)C-~1H异核相关及~(13)C-~1H异核远程相关谱进一步地确定了~1H谱和~(13)C谱中各谱峰的归属,为同类化合物的表征提供了一个依据.     

新型3-取代-6-(4-氯苯基)-7-(1H-1,2,4-三唑-1-基)-1',2',4'-三唑[3,4-b]-1",3",4"-噻二嗪衍生物的合成及抗菌活性

通过3-取代-4-氨基-5-巯基-1,2,4-三唑(3a～3m)和2-溴-2-(1H–1,2,4-三唑-1-基)-4′-氯代苯乙酮(2)的缩合反应,合成了13个新型3-取代-6-(4-氯苯基)-7-(1H-1,2,4-三唑-1-基)-1',2',4'-三唑[3,4-b]-1",3",4"-噻二嗪衍生物4a～4m.化合物结构经元素分析,1HNMR,IR和MS进行了表征.抗菌试验表明所合成的化合物对细菌表现出中等程度的抑制活性.     

Cu(I)配位聚合物 [Cu3(CN)3(3-pytpy)]n的合成、晶体结构及其荧光性质

在160 °C下, 以4"-(4-吡啶基)-3,2":6",3"-三联吡啶 (3-pytpy) 为配体,Cu(OAc)2.H2O为金属盐, 通过水热法在乙腈/水的混合溶剂中合成了一个Cu(I) 配位聚合物 [Cu3(CN)3(3-pytpy)]n (1)。通过元素分析、红外光谱 (IR)、X-射线粉末衍射 (XRD) 和热重分析 (TGA) 对配合物1进行了表征,并用X-射线单晶衍射分析确定了晶体结构。结果表明, 其晶体属单斜晶系, 空间群为P21/c, Mr = 579.03, a = 7.132 (6) ?, b = 17.431 (13) ?, c = 18.388 (13) ?, β = 94.284 (14)°, V =2280 (3) ?3, F(000) =1152, Z = 4, ?(MoKα) = 2.799 mm-1, Dc = 1.687 g/cm3, 最终残差因子R1 = 0.0447 , wR2 = 0.1238。Cu(I) 均为畸变三角形配位模式, 配位原子分别为：三联吡啶配体吡啶环上的N原子、CN-基N原子和另一个CN-基C原子。CN-基桥联Cu(I) 离子形成沿ac平面对角线方向延伸的一维内消旋螺旋链 [Cu(I)-CN]n, 配体3-pytpy则进一步桥联这些一维链形成二维 “波浪型” 网络结构, 2D层以ABAB方式堆积并通过吡啶环间的π...π堆积作用拓展为三维超分子结构。     

五配位Cu(Ⅰ)配合物[Cu(4'-Phtpy)(PPh3)2](BF4)的合成、结构及光谱性质研究

由[Cu(MeCN)2(PPh3)2](BF4)和4'-苯基-2,2':6',2"-三联吡啶(4'-Phtpy)在室温下反应,合成了一个新颖的具有光致发光性能的五配位配合物[Cu(4'-Phtpy)(PPh3)2](BF4).对配合物进行了X射线衍射结构表征,并进行了红外光谱、紫外可见光谱、荧光光谱等光谱学分析.晶体属单斜晶系,空间群Pn,晶胞参数:α=1.0807(6)nm,b=1.0943(6)nm,c=2.1610(12)nm,α=90°,β=102.785(10)°,γ=90°,V=2.492(2)nm3,Z=2,Dc=1.354g@cm-3.配合物中,Cu(Ⅰ)与4'-Phtpy的3个N,2个PPh3的P配位呈变形三角双锥型结构,其轴向由Cu键合联吡啶的末端2个N所组成,赤道平面由联吡啶的中心N原子和2个PPh3的P原子所组成.     

X-ray Structure of 1- (3' -Phenyl-4' -morpholinyl-2' 5' - dithiole-1' - ylidene)-3, 4-biscarboethoxy-2-thionaphthalene

1INTR0DUCTIONa-Thiocarbonylthioformamideshavebeensynthesizedsince1980[l-23,however,thereisn0reP0rtofthesecomP0undsrelatedtheirpropertiesandreactivities(3).Ac-cordingtothepublishedpapers('-",adithioketone,adithioesterandadithioth-ioesteraresnitablefort4 2JcycloadditionwithalkenicandacetylenicdienophileS.Wewanttoknowwhethera-thiocarbonylthioformamideshavethesamecharacters,thereforethereactionofathiobenzoylthioformmorpholine(1)withdiethylacetylenedicarboxylate(2)wasexplored.Theredultsshowth…     

Synthesis and Crystal Structure of a New Mononuclear Copper(Ⅱ)Complex with 4,4',6,6'-Tetrabromo-2,2'-[ethylenedioxybis(nitrilomethylidyne)]diphenol

A new mononuclear Cu(Ⅱ)complex,[Cu(L)](H2L=4,4',6,6'tetrabromo-2,2'-[ethylenedioxybis(nitrilomethylidyne)]diphenol),has been synthesized and structurally characteri-zed.X-ray crystal stucture of the complex reveals that the Cu(Ⅱ)ion is four-coordinated by two oxygen atoms and two nitrogen atoms from L2-unit.Crystallographic data:monoclinic,space group P21/n with a=14.076(2),b=6.9801(14),c=19.858(2)(A),β=107.613(2)°,C16H10Br4CuN2O4,Mr =677.44,V=1859.6(5)(A)3,Dc=2.420 g/cm3,μ=9.796 mm-1,F(000)=1284,Z=4,the final R=0.0516 and wR=0.0938 for 1879 observed reflections with I＞20(I).The dihedral angel between the two coordination planes of Cu(1)-N(2)-O(4)and Cu(1)-N(1)-O(3))is 30.08(6)°.     

2',3'-二脱氧-2',3'-二去氢鸟嘌呤核苷构象稳定性的理论研究

采用密度泛函方法在B3LYP/6-31＋G**水平上研究了2',3'-二脱氧-2',3'-二去氢鸟嘌呤核苷分子(D4G)的构象. 分别研究在气相中的孤立分子和一水合物异构体的相对稳定性和异构体之间的相互转变过程, 分析了水分子的参与对D4G异构体的相对稳定性和几何结构参数以及自然电荷的影响. 结果表明, 孤立的D4G分子在气相中存在8种稳定构象, 其中构象d4g-2是所有构象中最稳定的, 气相中D4G主要以d4g-2存在. 气相中各构象的相对稳定性为: d4g-2＞d4g-1＞d4g-5＞d4g-3＞d4g-6＞d4g-4＞d4g-8＞d4g-7. 计算得到的各构象键长和键角数据与实验值接近. 一个水分子的加入对D4G分子的构型参数有所影响, 基本不改变D4G分子各构象的稳定性顺序, 但构象转变的能垒有所提高. 氢键在分子构象中发挥了重要作用.     

微波辐射下合成5-(2-甲基/三氟甲基-苯并咪唑-1-亚甲基)-3-(苯基/p-取代苯基)-2H-1',2',4'-三唑[3,4-b]-1

分别采用微波辐射法和加热回流的常规方法, 将1-氨基-2-(2-甲基/三氟甲基-苯并咪唑-1-亚甲基)-5-巯基-1,3,4-三唑与α-溴代芳基乙酮3a～3e反应, 合成了一系列未见文献报道的1,2,4-三唑[3,4-b]-1',3',4'-噻二嗪类化合物4a～4e 和5a～5e. 微波辐射法具有反应时间短、产率高、副反应少等优点. 标题化合物经元素分析, IR, ¹H NMR, MS确证结构.     

2',3'-二脱氧-2',3'-二去氢鸟嘌呤核苷构象稳定性的理论研究

采用密度泛函方法在B3LYP/6-31＋G**水平上研究了2',3'-二脱氧-2',3'-二去氢鸟嘌呤核苷分子(D4G)的构象. 分别研究在气相中的孤立分子和一水合物异构体的相对稳定性和异构体之间的相互转变过程, 分析了水分子的参与对D4G异构体的相对稳定性和几何结构参数以及自然电荷的影响. 结果表明, 孤立的D4G分子在气相中存在8种稳定构象, 其中构象d4g-2是所有构象中最稳定的, 气相中D4G主要以d4g-2存在. 气相中各构象的相对稳定性为: d4g-2＞d4g-1＞d4g-5＞d4g-3＞d4g-6＞d4g-4＞d4g-8＞d4g-7. 计算得到的各构象键长和键角数据与实验值接近. 一个水分子的加入对D4G分子的构型参数有所影响, 基本不改变D4G分子各构象的稳定性顺序, 但构象转变的能垒有所提高. 氢键在分子构象中发挥了重要作用.     

新型3-取代-6-(4-氯苯基)-7-(1H-1,2,4-三唑-1-基)-1',2',4'-三唑[3,4-b]-1",3",4"-噻二嗪衍生物的合成及抗菌活性

通过3-取代-4-氨基-5-巯基-1,2,4-三唑(3a～3m)和2-溴-2-(1H–1,2,4-三唑-1-基)-4′-氯代苯乙酮(2)的缩合反应, 合成了13个新型3-取代-6-(4-氯苯基)-7-(1H-1,2,4-三唑-1-基)-1',2',4'-三唑[3,4-b]-1",3",4"-噻二嗪衍生物4a～4m. 化合物结构经元素分析, ¹H NMR, IR和MS进行了表征. 抗菌试验表明所合成的化合物对细菌表现出中等程度的抑制活性.     

An H-phosphonate strategy for the synthesis of 2',3'-dideoxynucleoside triphosphates and homodinucleotides

The triphosphates and homodinucleotides of AZT and d4T have been efficiently synthesized from the corresponding nucleoside 50-H-phosphonate monoesters via the reactive pyridinium phosphoramidate intermediates.     

四氢咪唑并[2',1':2,3]噻吩并[5,4-c]哌啶衍生物的合成及抗肿瘤活性

以4-哌啶酮为原料,经过胺基保护、缩合、环合、脱保护等步骤,设计合成了一系列新型的5,6,7,8-四氢咪唑并[2',1':2-3]噻吩并[5,4-c]哌啶类化合物。通过核磁共振波谱仪(~1H NMR、~(13)C NMR)、质谱(MS)和元素分析确证了其结构。对其体外活性研究发现,该类化合物对乳腺癌细胞MCF-7具有一定的抑制活性,其中化合物5a的抑制活性最为显著,半数抑制浓度(IC_(50))值达到了8.6μmol/L。为此类化合物的抗肿瘤活性研究提供了参考。     

Orientation effects on C2(5)-C2'(5')linked bioxazole isomers synthesized via regioselective and sequential C—H arylation

Bis(4-fluorophenyl) substituted oxazole(2,5-Oxz) and C2(5)-C2'(5') linked bioxazole isomers(C2-C2'_BOxz,C2-C5'_BOxz and C5-C5'_BOxz) were concisely synthesized via palladium-catalyzed regioselective and sequential C-H arylation in 1-3 reaction steps along with 20%-83% of total yields from oxazole and4-bromofluorobenzene.The linking orientation plays a key role in the packing geometry and photophysical properties of C2-C2'_BOxz,C2-C5'_BOxz and C5-C5'_BOxz.These bioxazole isomers in solid state showed significant differences in photoluminescence quantum yields(PLQY)(0.33,0.25 and 0.04,respectively),delayed fluorescence properties and powder X-ray diffraction(PXRD) patterns,suggesting the divergence in intermolecular interactions.The theoretically calculated gradient isosurfaces and complexation energies indicate the existence of intense π-π interactions between molecular layers,which are in good agreement with the variation trend of optical properties.     

MECHANISM OF INTERFERON ACTION——ACTIVATION OF MACROPHAGES AND ANTAGONISM TO a-FETO-PROTEIN BY _(ppp)A_(2'p5')A_(2'p5')A

_(ppp)A_(2'p),'A_(2'p,)'A(2'-5'P_3A_3) activates macrophages and increases the phagocytosis of macrophages from different species including human beings. This indicates that the activation of macrophages may be a general action of 2'-5'P_3A_3. This discovery broadens the effect of 2'-5'P_3A_3 beyond the antiviral field.α-Feto-protein (AFP) inhibits the phagocytosis of macrophages and may be involved in the development of hepatoma. Data presented here show that 2'-5'P_3A_3 can antagonize this suppressive effect of AFP.Methods used so far for introducing 2'-5'P_3A_3 into the cells were made with the aid of CaCl_2, etc. under conditions which may not be the same as those used clinically. It was found that 2'-5'P_3A_3 can develop its biological effect without the aid of CaCl_2, etc.     

4'-对二甲氨基苯基-2,2':6',2"-三联吡啶-锌配合物在含水乙醇介质中对磷酸根离子的高选择性识别研究

合成了一种-2,2':6',2"-三联吡啶衍生物,4'-对二甲氨基苯基-2,2':6',2"-三联吡啶(L),利用L与锌离子形成的稳定配合物(ZnL),用紫外可见吸收光谱和荧光光谱研究了在无水乙醇和含水乙醇介质中各种阴离子对该配合物ZnL的吸收光谱和荧光发射光谱的影响.发现该配合物能存含水乙醇介质中选择性的识别磷酸根类离子.磷酸根、磷酸氢根与磷酸二氢根离子分别与ZnL配合物以1:1、2:1及2:1结合模式影响体系的吸收和荧光发射,ZnL配合物对磷酸根类离子的识别作用主要源于配合物多余的结合位点.     

含羧基或酯基的新型二氧代氮杂茂并[3',4'-d]异(噁)唑衍生物的合成及其生物活性

在三乙胺的作用下,N-取代苯基-马来酰亚胺分别与α-氯代肟基乙酸和α-氯代肟基乙酸乙酯发生1,3-偶极环加成反应,合成了14种新型5-芳基-3a,6a-二氢-4,6-二氧代氮杂茂并[3',4'-d]异(噁)唑-3-甲酸衍生物(3a～3g)和5-芳基-3a,6a-二氢-4,6-二氧代氮杂茂并[3',4'-d]异(噁)唑-3-甲酸乙酯衍生物(4a～4g),其结构经1H NMR、IR和元素分析测试技术得以表征.对化合物进行了初步生物活性测试.结果表明,化合物3a、3b和3c样品浓度为10 μmoL/L时.对人白血病细胞生长的抑制率均为100%.化合物3d、3e和化合物4a、4d、4e对细胞分裂周期磷酸酯酶Cdc25A具有不同程度的抑制作用:当质量浓度为2×10-5 g/mL时,其抑制率分别为61.47%、66.23%、18.92%、22.49%和56.43%.并探讨了其构效关系.     

MECHANISM OF INTERFERON ACTION Ⅲ——SIGNIFICANCE OF _(ppp)A_(2'P5')A_(2'P5')A IN THE ANTIVIRAL ACTION OF INTERFERON

This paper is to evidence that the antiviral effect of _(ppp)A_(2'p5')A_(2'p5')A(2'-5'P_3A_3) could cover a wide spectrum of viruses, the RNA viruses such as influenza H_3N_2/77, influenza H_1N_1/77, ECHO_(11), rhino, Sendai, Sindbis and VSV, and the DNA viruses such as herpes (type Ⅰ). In addition, the antiviral effect of 2'-5'P_3A_3 on ECHO_(11) virus, as compared with other viruses, is more efficient than that of IFN itself. It seems likely that 2'5'P_3A_3 plays an important role in the antiviral action of IFN. After comparing the action of 2'-5'P_3A_3 with interferon (IFN), it has appeared that the action of 2'-5'P_3A_3 is something parallel to that of IFN for most viruses. For a few viruses, however, considerable differences have been observed.