简介:通过水热法合成了一维链状的磷钼氧酸盐(DETA)。NaNa(H5P4Mo6O31)2]·8H2O(DETA—Diethylenetriamine),采用x-射线单品衍射结构分析,元素分析和红外光谱等表征.该磷钼氧酸盐属于三斜晶系,空间群是P-1,晶胞参数a=1.2434(3)nm,6—1.2610(3)nm,c=1.3079(3)nm,a=85.418(3)°,β=73.399(2)°),γ=82.175(3)°,V=1.9450(8)Elm。,F(000)=1462,Z=:=2.标题化合物的结构是由Na(H5P4Mo6O31)2簇单元,二亚乙基三胺阳离子和结晶水分子组成.另外,Na(H5P4Mo6O31)2簇由钠离子连接形成了一维的链结构.一维链结构又由于二亚乙基三胺阳离子和结晶水分子形成的氢键进一步连接三维超分子结构.用标题化合物修饰的碳糊电极(APM—CPE)对AA氧化有很好的电催化活性.
简介:Thecrystalstructureofthetitlecomplex{[Co(TCB)2/2-(IMI)2(H2O)2][Co(IMI)4(H2O)2]}(H2O)4(whereTCB=1,2,4,5-benzenetetracarboxylicanion;IMI=imidazole)hasbeendeterminedbyX-raydiffractionmethod.Crystaldatafor{[Co(TCB)2/2(IMI)2(H2O)2][Co(IMI)4(H2O)2]}-(H2O)4:triclinic,spacegroupP1,a=1.0647(2)nm,b=1.1165(1)nm,c=1.00361(1)nm,α=91.56(1)°,β=111.34(1)°,γ=115.642(10)°,V=0.9772(3)nm5,Z=1.Thepolymercobalt(II)complexhasanovelthree-dimensionnetworkstructure.Co(1)atomandCo(2)atombotharecoordinatedinanoctahedralarrangementandlocatedinthecenterofthecoordinationanionandthecenterofthecoordinationcation,respectively.MoreoverfourcarboxylgroupsofTCBaredividedintotwotypes,twopara-carboxylgroupsbridgeCo(1)atominmonodentatefashionandothertwopara-carboxylgroupsareinfree.
简介:Aseriesof2’-purineandpyrimidinederivativesof1’,4’-anhy-dro-2’-deoxy-D-arabitol(1)and1’,4’-anhydro-2’-deoxy-D-altritol(2)weresynthesizedregio-andstereo-selectivelyfromD-sorbitolthroughsomeconversioninhighyields.
简介:Anefficientsynthesisoffunctionalized4H-chromenesbythetandemreactionofb,g-unsaturatedaketoesterswith2-naphthols,1-naphthols,and1,3-dihydroxynaphthaleneshasbeenaccomplishedwithhighselectivityandexcellentyieldsinthepresenceofacatalyticamountofbismuthtriflate[Bi(OTf)3,5mol%]undermildconditions.Thefunctionalized4H-chromenesynthesisandourprevious2Hchromenehemiacetalsynthesiscouldcomplementeachothertoenrichreactiondiversity.
简介:Thetitlecompounds5a-5cwerepreparedviathereactionofmethyl2-perfluoroal-kynoates(4)withmethyl5-oxo-4-(triphenylphosphoranylidene)hex-2-enoate(3),whichwasobtainedfromthereactionofmethylpropynate(2)withacetylmethylenetriphenylphosphorane(1)at-5-0℃.IntramoleculareliminationofPh3POtookplacewhencompound5washeatedinaqueousmethanolat115-120℃insealedtube,yieldingdimethyl2-trifluoromethyl-4-methylisophthalate(6a)from5aandmethyl5-acetyl-4-hydroxy-2-heptafluoropropanylbenzoate(6b)from5b,respectively.Thestructuresofcompounds5,6aand6bwereconfirmedbyIR,MS,1HNMR,19FNMRand13CNMRspectroscopyandelementalanalyses.Rectionmechanismsfortheformationofcompounds5,6aand6bwereproposed.
简介:有核心壳的合成nanoparticles组织的Cross-linked-cyclodextrinpolymer/Fe3O4在carboxymethyl-cyclodextrin的表面上经由生气连接反应被准备(厘米--CD)在-cyclodextrin的修改Fe3O4nanoparticles由把epichlorohydrin用作crosslinking的碱的答案代理人。准备合成nanoparticles的形态学,结构和磁性被传播电子显微镜学(TEM)调查,Fourier变换红外线(FTIR)spectrometry,X光检查衍射(XRD)测量,thermogravimetric分析(TGA)和颤动的样品magnetometry(VSM)分别地。
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简介:利用室温液相还原、晶种生长的方法,成功的制备了大小形貌均一、性能稳定且具有磁性的Fe3O4@Cu2O复合纳米粒子,并且对制备的Fe3O4@Cu2O纳米粒子进行了光催化性能的研究.在以紫外光为光源的照射下,合成的Fe3O4@Cu2O纳米粒子对有机染料甲基蓝溶液起到很好的降解作用.更重要的是,在外加磁场的作用下,Fe3O4@Cu2O纳米粒子容易回收,具有良好的可循环利用性能.
简介:在这研究,新奇的分子地印的开的多孔的膜(MIOPM)为甲基4-hydroxybenzoate(M4HB)的选择吸附和分离用皮克林抱起对方的大腿把他摔倒模板方法和分子的印技术作好准备。模板M4HB,功能的单体,crosslinker和plastifier2-ethylhexylacrylate(2-EHA)在油阶段被包含。恐水病的硅石nanoparticles(HNP-SiO2)作为stabilizer被采用与nonionic表面活化剂sorbitantrioleate(跨度85)建立稳定的W/O皮克林抱起对方的大腿把他摔倒。SEM和FTIR的结果显示最佳的MIOPM成功地被准备并且拥有了开、互连的毛孔。然后,MIOPM为M4HB被用作吸着剂。关联系数(为Langmuir-Freundlich等温线模型和pseudo-second-order的R2)价值运动模型适合到吸附平衡和运动数据都分别地比0.95高。最大的吸附能力和为MIOPM4的快速的吸附的时间是4.146 ;mg ;g−1和100 ;min分别地。另外,为与在结构上相比的M4HB的MIOPM的渗透分离因素联系了模拟甲基2-hydroxybenzoate(M2HB)能到达3.122。
简介:Themonomericcobalt-phosphite-thiolatocomplex[Co(mpt)2{P(OCH3)3}2]BF4(Hmpt=2-mercaptothiazoline)hasbeenpreparedandcharacterizedbyX-raycrystallography.ThecomplexcrystallizesinthemonoclinicspacegroupC2/cwitha=0.8078(5),b=2.6020(18),c=1.2191(7)nm,β=99.38(1)°,V=2.528(3)nm3,andZ=4.Thestructurecomprisesdiscretecations[Co(mpt)2{P(OCH3)3}2.]+andanionsBF4-,inwhichthecobalt(Ⅲ)atomiscoordinatedtotwochelatempt-andtwoas-orientedmonodentateP(OCH3)3ligandsinahighlydistortedoctahedralgeometry.ThemostdistortedanglesareS(2)-Co(1)-S(2a)of162.23(10)°andN(1)-Co(1)-S(2)of71.47(13)°,thelatteriscausedbythegeometricconstraintofthebidentateligandmpt-.CyclicvoltammetryhasbeenusedtostudytheelectrochemicalbehaviorofthetitlecomplexontheRelectrodeinMeCNsolutionwith0.1mol·L-1ofBun4NBF4aselectrolyte.TheresultsindicatethatthetitlecomplexisunstableinMeCN.