fundamentals of photochemistry - mukherj

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1、Prefacewr:~TTqar:I"(AllthatexistswasbornfromtheSun)-Brhad-devata,I:61Inthelasttenyearsphotochemistryhasseenatremendousupsurgeofinterestandactivity.Agreatdealoffundamentalknowledgeabouttheexcitedstateshascometolightasaresultoftheadventoftunableandhighintensitylaserbeams.Thefieldisdevelopingsofastt

2、hatanyknow-ledgegainedbecomesoutdatedbeforeitisfullycomprehended.Inthecircumstances,perhapsanothertextbookisjustified.Thisbookiswrittenasauniversityleveltextbook,suitableforgraduate,postgraduateandresearchstudentsinthefieldofphotochemistry,photo-physicsandphotobiology.Duringthelongyearsofteaching

3、photo-chemistryatthegraduateandpostgraduatelevels,Ihavealwaysfounditdifficulttorecommendasingletextbooktothestudents.MyfirstintroductiontophotochenlistrywasthroughBowen'sChemicalAspectsofLightwhichverylucidlyexplainedtheinteractionsbetweenradiationandmatterandtheirconsequencesandwhichhasinfluence

4、dmethemostalthoughphotochemistryhastravelledalongwaysincethen.Ihavefreelytakenthehelpofbooksandmonographswhicharenowavailableonthesubject.Allthesebooksarelistedinthebeginningofthebiblio-graphy.J.B.Birks'PhotophysicsofAromaticMolecules,N.J.Turro'sMolecularPhotochemistry,J.P.Simons'Photochemistryan

5、dSpectroscopyandA.A.LamolaandN.J.Turro(ed)OrganicPhotochemistryandEnergyTransferaresomeofthebooksfromwhichIhavedrawnheavily.Totheseshouldbeaddedthemanyreviewarticleswhichhavebeenofgreathelp.Ihaveadapteddiagramsfromson-.ofthesearticleswhichhavebeenacknowledged.Asthetitleimplies,thebookemphasizesth

6、efundamentalaspectsofphotochemistry.Thefirstsectionintroducesthesubjectbyenumeratingtherelevanceofphotochemistry.Sincethevocabularyofphotochemistryisthatofspectroscopy,thesecondsectioninwhichisdiscussedenergylevelschemesandsymmetryproperties,islikearefreshercourse.Inthethirdsectiontheactualmechan

7、ismoflightabsorptionistakenupindetailbecausetheprobabilityofabsorptionformsthebasisofphoto-chemistry.Aproperunderstandingoftheprocessisessentialbeforeonecanappreciatephotochemistry.ThenextthreesectionspresenttheXPREFAC