功能有机材料.ppt

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1、SynthesisandCharacterizationofNovelChiralConjugatedMaterials新型手性共轭材料的合成与特性学生刘晓峰学号2013110870导师于海涛教授1.Introduction2.SyntheticApproachestoHighlyAnnelatedChiralπ-ConjugatedSystems2.1Helicenes2.2PhotochemicalSyntheses2.3Non-photochemicalSyntheses2.4DoubleHelicenesandChiralPolycyclic

2、AromaticHydrocarbons2.5Tetraphenylenesandπ-ConjugatedDoubleHelices2.6BarriersforRacemizationofChiralπ-ConjugatedSystems3.ConclusionChiralityisincreasinglyimportantinthedesignoforganicπ-conjugatedmaterials.Oneoftheaspectsofthedesigninvolvesoptimizationofachiralpropertiesthrought

3、heintroductionofchirality.Inthiscontext,theinherentthree-dimensionalcharacterofchiralityandthecontrolofintermolecularinteractionsassociatedwithdiastereomericrecognitionprovideaversatilehandlefortheoptimizationofsupramolecularstructures,filmmorphologyandliquidcrystallineorderofp

4、-conjugatedpolymersandoligomersinthreedimensions.Introductionthedesigninvolvesoptimizationofchiralcounterpartsofpropertiesinoptics(circularpolarizationoflight),electronics(chiraltransportofchargecarriers),etc.Thechallengeinthisareaistoobtainmaterialswithinherentlystrongchiralpr

5、opertiesatthemacromolecularlevel,ratherthanderivedfromanaggregateorasupramolecularstructure.Suchinherentlystrongchiralproperties,approachingorexceedinginmagnitudetheirachiralcounterparts,wouldfacilitateexplorationofchiralpropertiesofsinglemoleculedevicesandthedesignofnovelchira

6、lmaterials.Thischapteraddressessyntheticaspectsofmoleculeswithhighlyannelatedchiralp-conjugatedsystems,withthefocusonhelicene-typeoligomers.Inadditiontosynthesis,configurationalstability(barriersforracemization)andselectedchiropticalpropertiesofsuchmoleculeswillbediscussed.2.Sy

7、ntheticApproachestoHighlyAnnelatedChiralπ-ConjugatedSystems2.1Helicenes[n]Helicenespossessangularlyannelatedaromaticrings,formingahelicallyshapedp-conjugatedsystem,suchassixortho-annelatedbenzeneringsin[6]helicene(1)2.2PhotochemicalSynthesesVollhardt’sgroupadoptedthecobalt-cata

8、lyzedphotochemicalcyclotrimerizationofalkynesfortherap