Excited state spectroscopy and dynamics of isolated adenine and 9-methyladenine

Literature Information

Publication Date 2001-04-06
DOI 10.1039/B101191J
Impact Factor 3.676
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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.

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Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics
CiteScore: 5.5
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Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.

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