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1.
Recentprogressinsurfacespectroscopyandmolecularbeamscatteringanddetectiontechniquesmakesitnowpossibleatthemicroscopicleveltoaccuratelymeasuresuchthingsasdissociationrates,adsorbatebindingandgeometry,andmobilitiesofadsorbedspeciesonsurfaces.Thiskindofe…  相似文献   

2.
Thesolventextractionofcobaltwithorganophosphorusacidicextractantsischaracterizedbyitshigherextractionselectivitythannickelfromaqueoussolutions[1].Theextractabilityandselectivityofmetalionsarecloselyrelatedtothecoordinationstructureofmetalswithextractan…  相似文献   

3.
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   

4.
Introduction  Non covalentinteractionshaveabiginfluenceontheconformationalorganizationofthebiomoleculeswhichisresponsiblefortheregio andstereo specificityofvariousbiologicalprocesses .1Amongtheseinteractions ,thein tramolecularstackinginteractionbetweens…  相似文献   

5.
Helicalstructure,animportantfactoraffectingtheopticalactivityofchiralmolecules,haslongbeenconcernedbychemistsandphysicists.In1860,Pasteurinhisfamousstudyontartaricacidsaskedthequestionwhethertheopticalactivityisduetotheatomsofthedextroacidgroupedonthespi…  相似文献   

6.
Thereversemicellesarewater in oilmicroemulsiondropletsstabilizedbyasurfactantinanorganicsolvent .Thepolarsurfactantheadgroupssurroundsmallwaterpoolswithinwhichhydrophilicmolecules,suchasaminoacidsandproteins ,canbesolubilized .Theapolarsurfac tanthydrocar…  相似文献   

7.
1 INTRODUCTIONSeveralincorrectspacegroupshavebeenre assignedbymakinguseofsimulatedstructurefactors;however,thecruxofthisoranyspacegrouprevisionistheaccuratereportingofthespacegroupandatomiccoordinatesoftheincorrectlydeterminedstructuresincethetruestruc…  相似文献   

8.
王瑞虎  洪茂椿  翁家宝  曹荣  罗军华 《中国化学》2002,20(10):1124-1128
IntroductionDesignandsynthesesofnovelsupramolecularcom plexeswithunusualandtailorablestructuresarefunda mentalstepsindiscoveryandfabricationofvarioustech nologicallyusefulfunctionalsupramoleculardevices .1 3Recently ,considerableeffortshavebeendevotedtocr…  相似文献   

9.
Inrecentyears,thestudyontheconversionandapplicationofsolarenergyhasbeenoneofthemostactiveaspectsinthefieldsofnewenergeticsourcedevelopment,thefabricationofnovelsolarenergycellsbecomesthegoalofpeople’sefforts.Inorganicsemiconductivesolarenergycellshave…  相似文献   

10.
IntroductionTheorganometallicchemistryoflanthanidemetalsinlowoxidationstatesiscurrentlyun dergoingarapiddevelopment.Thestudiesondivalentmetal complexchemistryhaveledtoavarietyofnewclassesofcomplexesandreactivitypatterns[14 ] .Theimportanceofstericfactorsc…  相似文献   

11.
IntroductionSupramolecularself organizationasacontrollabletechniquefortheartificialsupramoleculararchitectureatmolecularand/ornanosizedlevelisshowingfascinatingperspectivesinthefieldofthemolecularmaterialsde sign ,duetothatorganicandinorganiccomponents…  相似文献   

12.
IntroductionLithiumionconductorsarepromisingmaterialsformanykindsofelectrochemicalapplication ,suchaselec trolytesforhigh energydensitybatteries .1Thepropertiesofhighionicconductivity ,highdecompositionpotential,stabilityandcompatibilityagainstelectrodess…  相似文献   

13.
Integralmembraneproteinsarecriticaltoawidevarietyofcellularpsychologicalactivities,suchascytochromeoxidaseinmediatingelectrontransportandtheactivationofintracellularsignalsbytransmembranereceptorscoupledtoGproteins[1].Inthesemembraneactivities,themechan…  相似文献   

14.
ThefluorosulfonylisocyanateandchlorosulfonylisocyanatemoleculesarethemostreactivemoleculesforthetransferenceoftheNCOgroupandareveryimportantinsyntheticchemistry.Duetotheirversatilityinchemicalreactions,theyhavealsobecomethesubjectofmanystructuralstudi…  相似文献   

15.
Oneofthemostimportantaimsofphotochemistryisthedesignandconstructionofmoleculardevicesforener gyconversionandinformationprocessing .Thephotoactivemoleculardevicesarebasedonthephotoinducedelectrontransferbetweendonor acceptortypeorganiccompoundsandaccept…  相似文献   

16.
于燕生  钱人元 《中国化学》2002,20(11):1154-1161
IntroductionChainentanglementinrubberyandfluidstateofanamorphouspolymerisacharacteristicfeatureofthecon densedstateoflongchainmacromolecules .Theentangle mentconceptwasestablishedthroughstudiesofmeltvis cositybehavior,inrespecttothemolarmassdependenceof…  相似文献   

17.
Introduction  Photoinducedelectrontransfer (PET)isoneofthemostinterestingfeaturesofdonor acceptorsystemsforthedesignandtheconstructionofartificialmoleculardevicesforenergyconversionandinformationprocessingwhichhaveanumberofpotentiallyintriguingapplicat…  相似文献   

18.
Asymmetricsynthesis,inparticularthecatalyzedasymmeticsynthesis,hasbeenafascinatingareaofcurrentresearchinterestduetospecialphysicologicalactivitiesandwideapplicationsasmedicinesandpesticides[1].Asymmetriccatalyst,whichpresentsachiraltemplate,playsacrucia…  相似文献   

19.
IntroductionInthepastseveralyears ,considerableprogresshasbeenachievedincontrollingtheassemblyofindividualbuildingblocksintostructureswithspecifictopologiesandinterestingpropertiessuchasmolecularrecognition ,ionexchangeandselectiveguestinclusion .1 3 Itis…  相似文献   

20.
Noncyclicpolyethershaveattractedmoreandmoreattentionfortheirnonexpensive,lesstoxicityandsoon.Theyhavesomepromisingapplicationsinsolventextractionandenrichmentofmetalionsaswellasintheionselectiveelectrode,etc.[1].NoncyclicpolyetherSchiffbaseisoneofpolyden…  相似文献   

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