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Chapter 4 New Materials to Solve Energy Issues through Photochemical and Photophysical Processes: The Kinetics Involved Tatiana Duque Martins, Antonio Carlos Chaves Ribeiro, Geovany Albino de Souza, Diericon de Sousa Cordeiro, Ramon Miranda Silva, Flavio Colmati, Roberto Batista de Lima, Lucas Fernandes Aguiar, Leandro Lima Carvalho, Renan Gustavo Coelho S. dos Reis and Wemerson Daniel C. dos Santos Additional information is available at the end of the chapter http://dx.doi.org/10.5772/intechopen.70467 Provisionalchapter NewMaterials toSolveEnergy Issues through PhotochemicalandPhotophysicalProcesses: TheKinetics Involved TatianaDuqueMartins,AntonioCarlos ChavesRibeiro,GeovanyAlbinodeSouza, DiericondeSousaCordeiro,RamonMiranda Silva,FlavioColmati,RobertoBatistadeLima, LucasFernandesAguiar, LeandroLima Carvalho,RenanGustavoCoelhoS.dosReis andWemersonDanielC.dosSantos Additional information isavailableat theendof thechapter Abstract Kinetic ratesof energyproductionareextremelycontrolledby the competingprocesses that occur in systems capable of energy transfer. Besides organic and inorganic com- poundsalreadyknownaselectronicallyactives, supramolecularsystemscanbethought to formenergy transfer complexes to efficiently convert, for instance, light into electric- ity and themechanisms for that can be of anykind. Photophysical andphotochemical processes can simultaneously occur in such systems to provide energy conversion, by competingmechanisms or collaborative ones. Thus, to investigate the kinetic rates of eachprocessandtounderstand thedynamicsof theelectronicexcitedstatespopulation and depopulation in strategically structured materials, can offer important tools to efficientlymake use of this not always so evident power of supramolecularmaterials. In this chapter,wepresent thestate-of-the-artof theuseofphotophysicalprocessesand photochemical changes,presentedbynewmaterials anddevices toprovideacontrolof energy transfer processes and enable distinct applications, since energy conversion to sensingand imaging techniques tomaterial characterization. Keywords:photochemistry,photophysics,kinetics, excitedstates lifetime,electronic energy transfer,nanomaterials, energyconversion © TheAuthor(s). Licensee InTech.This chapter isdistributedunder thetermsof theCreativeCommons AttributionLicense (http://creativecommons.org/licenses/by/3.0),whichpermitsunrestricteduse, distribution, andeproduction inanymedium,providedtheoriginalwork isproperlycited. DOI:10.5772/intechopen.70467 © 2018 The Author(s). Licensee InTech. This chapter is distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.