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dc.creatorBriney, Kristin A.en_US
dc.creatorHerman, Leslie V.en_US
dc.creatorBoucher, Dave S.en_US
dc.creatorCrim, F. Flemingen_US
dc.date.accessioned2010-07-12T14:08:13Z
dc.date.available2010-07-12T14:08:13Z
dc.date.issued2010en_US
dc.identifier2010-TA-06en_US
dc.identifier.urihttp://hdl.handle.net/1811/46221
dc.descriptionAuthor Institution: The University of Wisconsin-Madison, Department of Chemistry, 1101 University Avenue, Madison, WI 53706en_US
dc.description.abstractWe study the effect of vibrational energy on the isomerization reaction of \textit{trans}-stilbene in deuterated chloroform. We first excite a ground-state C-H stretch overtone or a stretch-bend combination and allow vibrational relaxation to occur within the molecule before photoinitiating the excited-state isomerization with an ultraviolet photon. Once the stilbene molecule is on the excited state, we monitor the isomerization dynamics via broadband transient absorption spectroscopy. We measure an excited-state lifetime of 55 $\pm$ 9 ps when exciting through the C-H stretch overtone and a lifetime of 56 $\pm$ 7 ps for excitation through the stretch-bend combination. The \textit{trans}-stilbene excited-state lifetime after single photon vertical excitation is 52 $\pm$ 6 ps with the total added energy being the same for all measurements. Unlike in gas phase studies, where vibrational motion can change the outcome of a chemical reaction, there is no observed difference in the reaction dynamics when exciting this condensed phase system with a single photon versus exciting through a ground-state vibrational mode. Interactions with the solvent cause fast vibrational relaxation on the excited state, though the insensitivity of the rate to vibrational energy may also be due to excess vibrational energy not being promptly partitioned into modes along the isomerization coordinate.en_US
dc.language.isoenen_US
dc.publisherOhio State Universityen_US
dc.titleTHE EFFECT OF VIBRATIONAL ENERGY ON THE ISOMERIZATION REACTION OF TRANS-STILBENE IN THE CONDENSED PHASEen_US
dc.typeArticleen_US
dc.typeImageen_US
dc.typePresentationen_US


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