双光子光化学

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1、激光化学与双光子光化学樊美公2011激光(线性)化学同步双光子（非线性）光化学分步双光子（分步双激光）光化学双分子双光子光化学激光化学与双光子光化学同步双光子同步双光子吸收机理同步双光子技术特征Z-扫描结果分步双光子光化学1989，Renzepis飞秒分步双光子光化学设备示例PhotochromismoffulgideTransmissionandAbsorptionspectraoftwo-photochromicprocessPotentialenergycurvediagram分步双光子（分步双激光）光化学螺噁嗪的光致变色机理StudiesonPhotochromicMecha

2、nismofSpirooxazinesbyTwo-steptwo-lasermethod设计新化合物确证反应机理PhotochemistryandPhotophysicsofBenzophenoneandCarbonylcompounds二苯酮的光物理过程TransientabsorptionspectraofBenzophenoneExcitationat335nmDifferentexcitedstatesformationmonitoredat530nmduringultrafastpump-probeexcitedat267nmDifferentexcitedstatesform

3、ationmonitoredat530nmduringultrafastpump-probeexcitedat335nmFormationoftheS2statemonitoredat580nmduringultrafastpump-probeat267nmNorrishTypeIIReactionsComplexityofNorrishTypeIIReactionMechanismofNorrishTypeIIReactionApplicationofNorrishTypeIIreactionPhotochemistryofIntermediateTwo-lasertwo-photo

4、inducedreactionsTwo-steptwolaserphotolysisofBromonaphaleneandBromoanthraceneTwolaserphotolysisof2,2,6,6-tetramethylcyclohezenoneFluorescenceoffreeradical(Photochemicalintermediate)AbsorptionspectraoffreeradicalReactionsoffreeradical双分子双光子光化学Thankyouverymuchindeedforyourattention1P(excitationwav

5、elength375,371,400and355nmfor1,2,3,and4)and2Pfluorescence(736for1,2,3,800nmfor4),1and2are10timesexpandedPhotophysicspropertiesof1,2,3,and4AbsorptionspectraofspiropyrananditsphotochromicproductFluorescenceofB,excitationwith2P800nm.Decayofphotoluminescence(PL)ofB,excitation532nm.