简介：Aseriesoftitlecompoundsaswellastheirprecursorsweresynthesizedbyprecursorroute.TheirPXRDpatternswerecharacterizedwithZrW2O8orZrMo2O8modelbyRietveldmethod.Thethermalcontractionsofthecompoundsweredeterminedaccordingtothevariable-temperaturePXRDdataandNTEcoefficientswerepresented.Thetwo-phasemixtureofZrW0.4Mo1.6O8wasalsoanalyzedindividually.

简介：TheequilibriummolalitiesofIn3+inextractionreaction:In3+(aq)+3HOx(org)=In(Ox)3(org)+3H+(aq)weremeasuredationicstrengthsfrom0.13to2.54mol-kg-1intheaqueousphasecontainingNa2SO4asthesupportingelectrolyteandatconstantinitialmolalityofextractant,HOx,intheorganicphaseattemperaturesfrom278.15to308.15K,whereHOxandOxmean8-hydroxy-quinoliueanditsanion,respectively.ThestandardextractionconstantsK0atvarioustemperatureswereobtainedbytwomethodsproposedinourpreviouspaper.

简介：Thispaperreportstwolanthanidecomplexesofformula（C9H7）Ln（C8H8）·（THF）2whereLnisProrNd,C9H7isindenyl,andC8H8iscyclooctatetraene（COT）.ThecomplexeswerepreparedbythereactionofLnCl3withK（C9H7）andK2（C8H8）inTHF.（C9H7）Pr（C8H8）·（THF）2crystallizesinTHFat-15℃inthemonoclinicspacegroupP21:withunitcelldimensionsa=8.446（0）,b=10.083（2）,c=13.407（3）,β=105.48（1）°,V=1100.43（35）3,Dc=1.52g/cm3andZ=2.ThefinalRvalueis0.033,Rwvalueis0.030,respectively.In（C9H7）Pr（C8H8）·（THF）2afive-memberedringcentroidofC9H7,theC8H8ringcentroidandthetwooxygenatomsfromthetwoTHFmoleculesformadistortedtetrahedralgeometryaroundthemetal.

简介：ThespinelLiMn2O4-x(SO4)xcompoundcathodematerialsweresynthesizedbysolid-statereactionofthecalculatedamountsofLiOH·H2O,MnO2andMnSO4.Theresultsoftheelectrochemicaltestdemonstratedthatthesematerialsexhbitedexcellentelectrochemicalproperties.Thehighestreversiblecapacityoftheseseriesofcathodematerialswas-120mAh/g,andafter50cycles,thisreversiblecapacitywasstillaround116mAh/gwithnearly100%reversibleefficiency,whichrevealedthatdopedsulfateioncouldimprovethestructuralstabilityofspinel.

简介：Tris)(η5-cyclopentadienyl-μ-carbonyl-iron)-μ3-nitrosylclusterwasobtainedfromthereactionofcyclopentadienyldicarbonylirondimerwithnitrogenmonoxideinxylene.Theclusterwascharacterizedbyelementalanalyses,IR,MSand1HNMR.Thecrystalstructureof[(η5-C5H5)(μ-CO)Fe]3(μ3-NO).C4H8OwasdeterminedbyX-raydiffractionanalysis.ItcrystallizesintheorthorhombicspacegroupPnma,a=9.053(2),6=10.545(2),c=22.525(4)A,V=2150.3(7)A3,Z=4,Dc=1.68g.cm-3;structuresolutionandrefinementbasedon1141reflectionswithI>3.0(I)(MoKa,A=0.71073A)convergedatR=0.0540.Theinfraredabsorptionbandat1325cm-1oftheμ3-NOinthecluster,whichisredshifted,showsthatμ3-NOisactivated.

简介：ThesynthesisofanewtypeofX-ray-sensitivecompound'di-(1-hydroxylundecyl)diselenide'anditsapplicationinthepreparationofanewtypeofliposomewithX-raysensitivitywasreported.Thisnewliposomewassynthesizedtoencapsulatedoxorubicinhydrochloride(Dox),withitsphysicalandchemicalproperties,stability,andradiationsensitivitydetermined.BasedonthepH-gradientmethod,liposomalDoxwaspreparedviaultrasonicemulsificationandthenpurifiedonaSephadexG50mini-column.UVspectrophotometryandliquidchromatographywereusedtodetecttheencapsulationefficiencyandradiationsensitivityoftheDox-loadedliposome.Theresultsshowthatthroughchangesinreleaserate,thisliposomeshowsarelativeradiosensitivity.Intermsofradiationsensitivity,thedrugleakrateoftheX-ray-sensitiveDox-loadedliposomeincreasedgraduallyandpeakedat65.4%undertheX-rayradiationofadoseof10Gyormorethan10Gy,whichissignificantlydifferentfromthatofordinaryliposomes.Meanwhile,X-ray-sensitiveDox-loadedliposomehasagooddispersionstability,withanaverageparticlesizeofapproximate120nm.TheefficiencyofthisliposomeencapsulatingDoxwas75.84%,slightlylowerthanthatofordinaryliposomes.TheX-ray-sensitiveDox-loadedliposomeexhibitedsuspensionstabilitywithin30dofstorageat4°C,withoutvisibleprecipitation.Di-(1-hydroxylundecyl)diselenideissafeandnoncytotoxicandcomparedwiththoseofsyntheticphospholipidsitssynthesisislowcostanddoesnotrequirecomplexconditions.

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简介：到HOCN的HNCO的反应，到HSCN的HNCS和到HSeCN的HNCSe在MP2/6-311++G被学习了(2df，pd)//B3LYP/6-311++G(2df，pd)水平。反应物，转变状态和产品的几何学被优化了，转变状态的几何学第一次被报导。HNCO和HNCS容易被检测而不是HOCN和HSCN的原因被解释了。HNCSe将更容易比HSeCN被检测，这被预言。在反应的化学契约的破裂和形成被电子密度的拓扑的分析方法讨论了。在反应有二种结构转变状态(圣)的计算结果表演学习了。

简介：首次研究进口可利用含铜物料与进口铜矿属性的不同特性并建立了鉴定方法,采用X射线荧光光谱法和X射线衍射光谱法联用技术建立铜矿和含铜物料属性的鉴别方法。通过X射线荧光光谱法对铜矿和含铜物料中元素进行定性半定量分析,再用X射线衍射光谱法对铜矿和含铜物料的特征谱峰进行扫描,与X射线衍射仪中标准卡片比对分析,能够确定铜矿和含铜物料的物相组成。结果显示,X射线荧光光谱法测定的铜矿和含铜物料的共同特点是铜的含量较高,达到冶炼铜对原料的要求;硅、铁、钠、钙和镁元素都能够检出;差异性在铅和锌元素在含铜物料中较高,在铜矿石中基本未检出;用X射线荧光光谱法检测出的金属元素,通过X射线衍射仪扫描后与标准图片比对,各元素以不同的形式存在于含铜物料中,且有规律可循。

简介：一荧光灯分核derivate，N-allyl-1-pyrenemethylammoniumhydrochloride(APA+)，被报导与葫芦形成稳定的hostguest建筑群[8]uril(CB[8])，并且这个性质能被利用到确定CB的纯净[8]经由排放滴定。而且，APA+和CB的1:1建筑群[8]能进一步绑甲基viologen(MV2+)，它是广泛地使用的除草剂的主要成分，提供一个好方法检测MV2+，特别在低集中。

简介：运用多种方法、多种基组对PF（X3∑-）的平衡结构进行优化计算．用QCISD／6—311G（df）方法得到的平衡结构为RPF=0．1589nm，与实验值RPF=0．15897nm进行比较，最为接近，得出QCISD／6—311G（d，）基组为最优基组；然后对PF（X3∑-）进行单点能扫描计算，用正规方程组拟合Murrell-Sorbie函数，得到相应电子态的势能函数解析式，由势能函数计算了与PF（X3∑-）态相对应的光谱常数，结果与实验数据较为一致．这些数据为反应动力学提供了理论依据．

简介：8-羟基喹啉与许多金属元素（除碱金属外），在弱酸性或弱碱性溶液中能形成螯合物沉淀，这种沉淀分子量大，组成恒定。试样以硝酸和氢氟酸溶解，EDTA为掩蔽剂，在乙酸铵-乙酸（pH=6．5）的缓冲溶液中，8-羟基喹啉与钨生成黄色沉淀，灼烧称重无水WO3。分别对沉淀时pH值、陈化时间、沉淀剂的用量进行选择，研究出了一种快速、准确、经济的分析方法。分析准确度好、精密度高，完全能够满足生产分析要求。

简介：Lophenol,cholest-4α-methyl-7-en-3β-ol(1),obtainedfromDracaenacochinchinensis(Lour.)S.C.Chen,wasstructurallymodified.Itwasacetylatedtoprotect3β-hydroxylgroup,andthenoxidisedbyseleniumdioxideinaceticacidtogivecholest-4a-methyl-8-en-3β,Ta-dioldiacetate(3).Thiscompound3isunstableinchloroformsolutionorwhenheatedandeasilyconvertedtoadienecompound,cholest-4a-methyl-7,14-dien-3β-olacetate(4).Thestructuresof3and4wereelucidatedbymeansofIR,^1HNMR,^13CNMRandMS,andtheabsoluteconfigurationof3wasestablishedbyX-raycrystallography.Thepropertyof3wasalsodiscussedinthispaper.Both3and4arenewcompoundsandwerereportedforthefirsttime.

简介：使用x射线衍射法，通过石棉的2口特征峰进行判断，分析滑石粉中可能存在的石棉成分。结果表明，样品中不含温石棉、铁石棉和青石棉，并对温石棉和绿泥石进行了有效区分。方法快速，灵敏，可有效用于滑石粉中石棉的测定。

简介：一新荧光灯在1,8-naphthalimide和8-hydroxyquinoline之上基于的chemosensor被综合，并且它的荧光灯性质面对不同金属阳离子(Hg2+，Ag+，Zn2+，Fe2+，Cd2+，Pb2+，Ca2+，Cu2+，Mg2+，和Ba2+)被调查。它显示了荧光与重的一些和转变金属(HTM)离子熄灭，并且强烈熄灭取决于HTM离子的性质。

简介：ＳＹＮＴＨＥＳＩＳ　ＡＮＤ　ＣＯＭＰＬＥＸＡＴＩＯＮ　ＰＲＯＰＥＲＴＩＥＳ　ＯＦ　ＮＥＷ　ＤＩＯＸＯ　ＴＥＴＲＡＡＭＩＮＥ　ＬＩＧＡＮＤＳ　ＷＩＴＨ　８－ＭＥＴＨＹＬ　ＱＵＩＮＯＬＩＮＥ　ＡＳ　ＦＵＮＣＴＩＯＮＡＬ　ＰＥＮＤＡＮＴ（Ｓ）ＳＹＮＴＨＥＳ...

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简介：运用离散变分Ｘα方法对双核金属酞菁(Ｍ＝Ｖ２＋、Ｃｒ２＋、Ｍｎ２＋、Ｆｅ２＋、Ｃｏ２＋、Ｎｉ２＋、Ｃｕ２＋、Ｚｎ２＋等)系列化合物进行了量子化学研究，得到了其费米能级。总态密度、前线轨道布居等，讨论了它们的催化活性。

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简介：Anewseriesofliquidcrystalscomprisingeightheterocyclicisoflavoneesters,7-alkanoyloxy-3-[4’-(3-methylbutyloxyphenyl)]-4H-1-benzopyran-4-onesexhibitingenantiotropicnematic(N)andsmecticC(SmC)phasesweresynthesizedandinvestigated.Themesomorphicpropertiesofallderivativeswereinvestigatedbymeansofdifferentialcalorimetryandpolarizedopticalmicroscopy.WideangleX-raydiffractiontechniquewasemployedtoinvestigatethemolecularpackingassociatedwiththeintermolecularinteractionaswellasthecorrelationbetweenthethermalbehaviourofthesecompoundswiththeiranisotropypropertieswithinamesophase.