Excited state spectroscopy and dynamics of isolated adenine and 9-methyladenine
- 6 April 2001
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Physical Chemistry Chemical Physics
- Vol. 3 (10) , 1827-1831
- https://doi.org/10.1039/b101191j
Abstract
We report electronic spectra of the DNA base adenine and its derivative 9-methyladenine in a molecular beam, using [1 + 1] resonantly enhanced multiphoton ionisation. In addition an excited state lifetime of adenine was determined by picosecond time-resolved [1 + 1′] photoionisation. The spectrum of adenine is dominated by a band at 36105 cm−1, with several low-frequency bands nearby. A comparison with the spectrum of 9-methyladenine with its origin at 36136 cm−1 confirms that the electronic spectrum of adenine is dominated by the π → π* transition of the N9–H tautomer. Several bands observed before and assigned to a n → π* transition were not observed. For the most intense band of adenine at 36105 cm−1 we determined an excited state lifetime of 9 ps.Keywords
This publication has 0 references indexed in Scilit: