首页 | 本学科首页   官方微博 | 高级检索  
相似文献
 共查询到20条相似文献,搜索用时 468 毫秒
1.
朱士正  金桂芳  Des Marteau  D.D 《中国化学》2002,20(11):1268-1273
IntroductionInthepastdecades ,considerableresearchworkhasbeenfocusedonthefluorinatedionomers1 4 whichhaveexceptionalthermalandchemicalstabilities .5Thereforetheyhaveshownspecialapplications ,suchasmembraneseparationintheelectrochemicalprocessesandsuperaci…  相似文献   

2.
IntroductionIsonitrosoketonesandrelatedligandssuchasni trosophenolesareusedasanalyticalreagents .1Complexesofcobaltmetals2 ,3withisonitrosoketoneiminesarerelevanttothechemistryandbiochemistryofthevitaminB12 coen zymes .Isonitroso(oximino)groupofthoseligandsc…  相似文献   

3.
IntroductionFrontalchromatography (FC) ,anoldbranchinliquidchromatography (LC) ,1hasbeensuccessfullyem ployedinthesolutionofmanytheoreticalaswellasap pliedproblems—suchasmeasuringbindingconstantbe tweencomponents2 andkineticparametersofchemicalreactions ,3 ads…  相似文献   

4.
王莉  陈振初  郑钦国 《中国化学》2002,20(11):1457-1459
E mail:zhenchuc@mail.hz .zj.cnThechemistryoforganoseleniumcompoundshasbeengrowinginrecentyears ,becauseofthemanysyn theticapplicationsoforganoseleniumcompounds .1Alotofmethodsforthesynthesisofselenideshavebeenreport ed ,2a isuchasthereactionoflithiummethylsel…  相似文献   

5.
IntroductionGreatprogresshasbeenmadeinthechemistryofdi valentorganolanthanidecomplexes .Avarietyofnewclassesofcomplexeshavebeensynthesizedandwidelyusedinorganicsynthesisandpolymerchemistry .1 6 Itwasnoticedthatmostoftheworkpublishedisfocusedonthecomplexe…  相似文献   

6.
Theanalysisofunknowncomplexrealsamples,suchasbiologicalproducts,naturalmedicines,environmentalsamples,etc.,playsanimportantroleinbiochemistry,pharmaceuticalchemistry,environmentalchemistryandotherfields.Ithasbecomeoneofthehotspotsanddifficultpointsinmode…  相似文献   

7.
IntroductionReducedheteropolyanions(heteropolyblue)areofcontinuinginterestinsomeimpor-tantareasofchemistry,suchasanalyticalan...  相似文献   

8.
IntroductionLithiumionconductorsarepromisingmaterialsformanykindsofelectrochemicalapplication ,suchaselec trolytesforhigh energydensitybatteries .1Thepropertiesofhighionicconductivity ,highdecompositionpotential,stabilityandcompatibilityagainstelectrodess…  相似文献   

9.
Theformationofmanycomplexesoccurinthesolutiontostudytheinteractionbetweenthesoluteandsolventmoleculeisinterestingnotonlyforthesolutionchemistrybutalsoforthecoor-dinationchemistryoftheelements.Becausetheinorganicsaltsofsomemaingroupelementssuchasantim…  相似文献   

10.
FECS ,theFederationofEuropeanChemicalSoci eties,comprisesanumberofDivisionsandWorkingPar tiesspecializingincertainfieldssuchasFoodChem istry ,ElectrochemistryorChemicalEducation .AmongthemtheDivisionofAnalyticalChemistry ,DAC ,isoneofthelargestwithrespectto…  相似文献   

11.
Chemicalsynthesisplaysanimportantroleincurentmanufactureofpharmaceuticalsteroidhormones.Butsomeoftheimportantsteps,suchashyd...  相似文献   

12.
1 INTRODUCTIONCertaincoppercomplexeshavebeenshowntohaveunusualchemicalpropertiessuchasoxygentransfer,oxidativeadditionandhomogenouscatalytichydrogenation[1].Oxidativeadditionreactionsarekeystepsintheactivationofσbondsinagreatnumberofcatalyticprocess.Cop…  相似文献   

13.
IntroductionMolecularpolymerswithonedimensionalormulti dimensionalstructureassembledthroughhydrogenbondsisanimportantresearchcontentinthesupra molecularchemistryandcrystalengineering .1,2 Withthedevelop mentofnewtypefunctionalmaterialssuchasmolecularmagn…  相似文献   

14.
IntroductionThereactionofchlorineevolutionisoneofthemostsignificantareasunderinvestigationinthefieldofelectrocatalysisduetoitsdirectimpactinelectro chemicaltechnology .Historically ,theconsumablean odessuchasgraphite ,sinteredFe3O4 orPbO2 activat edgraphite…  相似文献   

15.
IntroductionRecently ,theBaylis Hillmanreactionhasbecomeaveryhotfieldforsyntheticchemists ,1 12 witharecentexampleofacatalyticasymmetricversion .13 IthasbeendisclosedthatthecombinationofaLewisbasesuchaschalcogenides ,amines ,phosphinesorquaternaryammo niumhali…  相似文献   

16.
1 INTRODUCTIONTheinvestigationofthestructuresoforganolanthanidecomplexeshasbeenofinterestformanyyearsbecauseitisimportanttointerpretthebondnatureandchemicalpropertiesofthesecomplexes〔1〕.Crystalstructuresoftris(indenyl)lanthanidecomplexes,suchas(C9H…  相似文献   

17.
1 INTRODUCTIONInrecentyears ,triazolo[3,4, b] 1 ,3,4 thiadiazolederivativeshavebeenat tractingmuchattentionfromchemistsandpharmacologistsbecausetheyshowbroadspectraofbiologicalactivities,suchasinsecticidal[1 ] ,antifungal[2 ] ,herbicidal[3] ,an tibacterial[4] ,hypotensiv…  相似文献   

18.
曾盈  宁君  孔繁祚 《中国化学》2002,20(11):1142-1144
β (1→ 3) Linkedglucansoccurinavarietyofbio logicallyimportantnaturalproducts ,suchasantitumorschizophyllan ,sceroglucanandlentinan ,1whileα (1→3) linkedglucansexistinsomemedicallyimportantfungisuchasCryphonectriniparasiticaandGanodermalu cidum .2 Forastudyonthe…  相似文献   

19.
ExtensivestudiesofradiationorchemicalinjuryofbiologicaltargetmoleculesdemonstratethatOHradical,themostreactiveoxygenspecies,reactswithbiologicalmacromolecules,suchasDNA,inducingbasealterations,basicsites,andstrandbreaks,resultedinvariouspathogenesis,such…  相似文献   

20.
IntroductionOwingtotheformationofstableanddeeplycoloredcomplexeswithheavymetalions(suchaslead(Ⅱ)etc),theferrocenylaroylhydrazonesarenotonlypotentiallyusefulasspe-cificreagentsinanalyticalandextractivechemistry[1]butalsostronglyactivebiologically,andc…  相似文献   

设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号