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IntroductionInthepastdecade ,alotofinteresthasbeencon centratedonpreparingandcharacterizingbridgingmetalcomplexesforinvestigatingtheirpotentiallyusefulelec tronicormagneticproperties .1,2 Recently ,severalmetalcomplexesbridgedbydicarboxylatehavebeensynthes… 相似文献
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Introduction Photoinducedelectrontransfer (PET)isoneofthemostinterestingfeaturesofdonor acceptorsystemsforthedesignandtheconstructionofartificialmoleculardevicesforenergyconversionandinformationprocessingwhichhaveanumberofpotentiallyintriguingapplicat… 相似文献
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IntroductionAmongtheinteractionsbetweenporphyrinsandfunctionalmoleculessuchasaminoacids ,ubiquinoneplaysimportantbiologicalfunctions .Themolecularrecognitionofaminoacidsandtheirderivativesisanimportanttopicforbothunderstandingthemechanismofaminoacyl tr… 相似文献
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NTRODUCTIONItisknownthatdialkylsulfidesareefectiveextractantsfortheextractionandsepara tionofnoblemetals〔1,2〕.Paladiumcomplex... 相似文献
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INTRODUCTIONThesynthesisofpolynuclearcopper lanthanoidcomplexesisofspecialinterestforsev eralreasons〔1-4〕.Thesecomplexesareim... 相似文献
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Thalliumisatoxicmetal.Becauseitsconcentrationinenvironmentalandbiologicalsam plesisinthe 1ng/grangeorless[1] ,itisdifficulttodeterminethemetalbyusingconventionalelectroanalysismethods .Differentialpulseanodicstrippingvoltammetry(DPASV )isasensitivemethodfor… 相似文献
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IntroductionOwingtotheformationofstableanddeeplycoloredcomplexeswithheavymetalions(suchaslead(Ⅱ)etc),theferrocenylaroylhydrazonesarenotonlypotentiallyusefulasspe-cificreagentsinanalyticalandextractivechemistry[1]butalsostronglyactivebiologically,andc… 相似文献
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1INTRODUCTIONCoppercomplexeshavealargevarietyofstericstructuresandplayanimportantroleincatalysingtheenzymaticactivities,which... 相似文献
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NIU ShuYunJIN Jing 《结构化学》1999,18(4)
1INTRODUCTIONItiswelknownthatlanthanideelementstendtobecoordinatedwithpolycar boxy ormacrocyclic containingspeciestoformpolyn... 相似文献
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Oneofthemostimportantaimsofphotochemistryisthedesignandconstructionofmoleculardevicesforener gyconversionandinformationprocessing .Thephotoactivemoleculardevicesarebasedonthephotoinducedelectrontransferbetweendonor acceptortypeorganiccompoundsandaccept… 相似文献
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IntroductionCopper(Ⅱ)complexeswithorganicacidsandotherdonorligandsexistextensivelywithinhumanbodies,andplayanimportantroleinavastrangeofchemicalandbiochemicalcatalyticsystems[1].Muchattentionhasbeenpaidtowhattheymayrevealtothestructuresandtheprobable… 相似文献
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0IntroductionNumerousuniqueframeworkshavebeenreportedbyassemblyofrationaldesignedorganiclig-andswithmetalionsoverthepastdecade1~3.Itisknownthatbothimidazoleandcarboxylatearefunctionalgroupsforcoordinationtotransitionmetalionstoformcomplexes4~6.Howeve… 相似文献
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催化酯化新进展(英) 总被引:1,自引:0,他引:1
酯化是一经典的有机合成反应,随着肽合成的进展,在此领域已做了大量的研究工作。介绍了一些新的酯化有机催化剂如: N , N ′ Dicycloh exylcarbodiim ide, 4dim ethylam in op yridin e, Bis[4( 2, 2dim ethyl1, 3dioxolyl)m ethy ] carbodiim ide, benzotriazolyl N oxytrisoim ethylam inophosphonium 和 2eth ox y1(eth oxycarbonyl)1,2dihydroqu inolin e。参考文献 20 篇。 相似文献
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IntroductionAxiallydissymmetric 1,1′ binaphthyland 1,1′ bi phenylligandsbearingtwoidenticalgroupsinthe 2 ,2′ positionhaveprovedtoberemarkablyusefulinenantiose lectivecatalysis ,withopticalyieldscloseto 10 0 %enan tiomericexcess (ee)obtainedinseveralpreparativelyim p… 相似文献
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1INTRODUCTIONMacrocyclicdioxotetramineswithvariousfunctionalpendantshavereceivedmuchat tention,theintroductionofvariousadditi... 相似文献
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Introduction Non covalentinteractionshaveabiginfluenceontheconformationalorganizationofthebiomoleculeswhichisresponsiblefortheregio andstereo specificityofvariousbiologicalprocesses .1Amongtheseinteractions ,thein tramolecularstackinginteractionbetweens… 相似文献
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IntroductionAsearlyas1851,Deville[1]firstidentifiedseveraldoublecarbonatesoftheformulA2CO3·MCO3·4H2O(A=Na,KandM=Mg,Ni,Co)andreportedthepotassiumcom-poundswithanorthorhombicsystem[1].Sinceeachofthethreecarbonateoxygensisabletoparticipateincoordination… 相似文献
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IntroductionTheabilityofdithiocarbamate(dtc)bindingtometalshasbeenknownformanyyears .Itformschelateswithvirtu allyalltransitionmetals.1Thebidentateanionisalsowellknownasabridgebetweentwotransitionmetalcenters.2 Wa ter solubledialkyldithiocarbamatecomplexes… 相似文献
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造影剂通常为Gd3+、Mn2+或Fe3+的稳定化合物.它们能改变体内水分子氢核的弛豫速率,从而提高正常与病变组织的磁共振成像(MagneticResonanceImaging,MRI)对比度或显示体内器官的功能状态.因此,开发新优MRI造影剂具有重要... 相似文献
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1 INTRODUCTIONThecondensationofaldehydeswithaminesisavaluablesyntheticmethodleadingtopolyazapolycyclics,includingcagedcompounds.Animportantapplicationofthisreactionisthesynthesisofhexabenzylhexaazaisowurtzitane(HBIW)anditsderivativeswithsubstitutedbenz… 相似文献