Direct observation of electronic relaxation dynamics in adenine via time-resolved photoelectron spectroscopy

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DOIResolve DOI: http://doi.org/10.1021/ja030532q
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TypeArticle
Journal titleJournal of the American Chemical Society
ISSN00027863
Volume126
Issue8
Pages22622263; # of pages: 2
AbstractWe present femtosecond time-resolved photoelectron spectra of adenine in a molecular beam, recorded at pump wavelengths of 250, 267, and 277 nm. This leads to initial excitation of the bright S2(*). Close to the band origin (277 nm), the lifetime is several picoseconds. Higher vibronic levels (267 and 250 nm excitation) show much shorter lifetimes of t < 50 fs, and we observe strong coupling between S2(*) and S1(n*). Rapid internal conversion (t < 50 fs) populates the lower lying S1(n*) state which has a lifetime of 750 fs. At 267 nm, we found evidence for an additional channel which is consistent with the dissociative S3(*) state, previously proposed as an ultrafast relaxation pathway from S2(*).
Publication date
AffiliationNational Research Council Canada; NRC Steacie Institute for Molecular Sciences
Peer reviewedYes
Identifier10072378
NPARC number12329058
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Record identifier09e2eb5c-18e3-489b-ab6f-f664e5483797
Record created2009-09-10
Record modified2016-05-09
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