简介：新奇的宏有切换氧化还原作用的二硫化物连接的周期的dilactams被综合。这些混合物被快增加方法在中等收益在宏环合步从2,2′-dithiodibenzoyl氯化物获得。

简介：Bis-silicon-bridged芪衍生物在联合了二度的准备的一个修改过程被综合[2-(silyl)苯基]乙炔和它的intramolecular在一个壶的减少的环合。结果显示一条壶途径在可比较的收益生产了目标产品到以前报导的二拍子的圆舞方法的。

简介：Fourμ-oxamidoheterodinuclearcomplexes,[Cu(oxae)Cr(L)2](NO3)3,whereoxaedenotestheN,N’-bis(2-aminoethyl)oxamidodianionandLrepresents1,10-phenanthroline(phen);5-nitro-1,10-phenanthroline(NO2-phen);5-methyl-1,10-phenanthroline(Me-phen)and2,2’-bipyridine(bpy),havebeensynthesizedandcharacterizedbyelementalanalyses,magneticmoments(atroomtemperature)andmolarconductivitymeasurementsandspectroscopy.Itisproposedthatthesecomplexeshaveextendedoxamido-bridgedstructuresconsistingofacopper(Ⅱ)ionandachromium(Ⅲ)ion,whichhaveasquareplanarenvironmentandoctahedralenvironment,respectively.Thecryomagneticpropertiesofthe[Cu(oxae)Cr(bpy)2](NO3)3(1)and[Cu(oxae)Cr(phen)2](NO3)3(2)complexeshavebeenmeasuredovertherangeof4.2-300K.Theleast-squaresfitoftheexperimentaldatabasedonthespinHamiltonian,H=-2JS1·S2,theexchangeintegrals(J)wereevaluatedas+36.9cm-1for1and+35.8cm-1for2.Theresultshaveconfirmed

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简介：单独螺旋状的碳的材料为潜在的应用的变化吸引了许多注意。此处，单独螺旋状1，4苯撑衔接了polybissilsesquioxanenanofibers用一双enantiomers通过一条超分子的templating途径被准备。在在是为获得激活的最普通的方法的700一方法的碳化以后，精力，和TGA的试验性的条件如下被设置：在氮气氛，与20mL/min的煤气的流动率，加热5-50的率??????????????????六吗？？

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简介：Fluorescencespectraofladderlikepolyphenylsilsesquioxane(LPPS)andladderlike1,4-phenylene-bridgedpolyvinylsiloxane(LPPVS)havebeenmeasuredasafunctionoftemperature(4-55℃),indilutetetrahydrofuransolution.Theexcimer(IE)tomonomer(IM)intensityratio(IE/IM)ofLPPSdilutesolutionshowsadoublelinearArrheniusplotwithabreakpointascribabletoatransitiontemperatureTr.Thisbehaviorhasnotbeenfoundforsinglechainpolyorganosiloxanes.WhenIn/EofLPPSwasplottedagainst1/T,italsogaveadoublelinearplotwithonebreakpoint,whichwasfoundinsinglechainpolyorganosiloxanes.ThedifferentbehaviorsbetweenLPPSandsinglechainpolyorganosiloxanesmaybemainlyattributedtotherelativelyrigiddouble-chainmacromolecularbackboneofLPPS.However,theln(IE/IM)ofdiluteLPPVSsolutionversus1/Tshowsasimplelinearvariationwithapositiveslopewhichconfirmsourproposition.ThedifferencebetweenthefluorescenceresultsofLPPSandthoseofLPPVSmaypossiblyderivefromtheirstructuredifferencesandcooperativemotioninbackbonechainbonds.

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简介：Toinvestigatethetreatmenteffectof2-seleniumbridgedβ-cyclodextrin(2-SeCD),aGPXmimic,onthestrokeofstroke-pronespontaneouslyhypertensiverats(SHRSP),fifty-twoSHRSPof8-weekoldwererandomlydividedintofourgroupsA,B,CandcontrolgroupD.TheratsofgroupsA,B,CandDweregiven1.0%-1.5%NaClmassfractionasdrinkingfluid.Afteronsetofstroke,groupsA,BandCweregivenorally16.05,160.5and1605mg*kg-1*day-1of2-SeCD,respectively,andgroupDwasgivenwaterfor2weeks.Theclinicalscoreofstroke,systolicbloodpressure(SBP),survivaltimeofratswererecordedandthehistopathologicexaminationsoftheirbrainandcarotidarteryweremadeafterdecapitation.Theclinicalscoresofstrokeaftertreatmentwith160.5mg*kg-1*day-1(GroupB)and1605mg*kg-1*day-1(GroupC)of2-SeCDare2.55±0.98and1.98±0.79,respectively,thoseareobviouslylowerthanthatofgroupD(3.41±0.83,p<0.01).ThesurvivaldaysingroupB(10.0±8.6)andgroupC(14.4±7.9)arelongerthanthatforgroupD(4.7±2.9,p<0.01).TheelectronmicroscopestudyshowedthattheendotheliumofcarotidarterywasneartonormalingroupBandgroupC,whileitwasseriouslyinjuredincontrolgroupDandmildlyinjuredingroupA.2-SeCDmayeffectivelybeusedtotreatthestrokeforSHRSP.

简介：Twocystine-bearing1,3-bridgedcalix[4]areneswereusedasthecoatingsofthequartzcrystalmicrobalance(QCM)withgoldelectrodes.Thetwocalix[4]arenederivativeswereself-assembledontothegoldelectrodesurfacebythecovalentattachmentbetweenthedi-sulfurandgold.Thecompoundofcystine-bearingbi-phenylalanine1,3-bridgedcalix[4]arene(CPC)withlongeralkylchainhadbetterself-assembledcapacityontothefreshsurfacesofgoldelectrodethanthatofcystine-bearing1,3-bridgedcalix[4]arene(CC)withcomparablyshorteralkylchain.ThemodifiedQCMsensorswereusedtorecognizethebutylamineisomersingas.TheresultsshowedthattheQCMcoatedwithbothcompoundshadpreferentialaffinityton-butylamine,theni-butylamine,t-butylamineintherangeoflowconcentrations,indicatingthatintherecognitionprocess,thesterichindranceeffectplayedanimportantrolewhenformingcomplexwithguestmolecules.Whentheconcentrationsoftheanalyteswereincreased,thepolarityandthemagnetismofthebutylaminebecamedeterminativefactors.Thereversibilitywasimprovedgreatlyandtheequilibriumtimewasmuchshorterontheself-assembledfilmthanonthefilmobtainedbydroppingcoating.