Absorption spectroscopy of adenine, 9-methyladenine, and 2-aminopurine in helium nanodroplets

Szymon Smolarek, Anouk M. Rijs, Wybren Jan Buma, Marcel Drabbels

Research output: Contribution to JournalArticleAcademicpeer-review

Abstract

High-resolution absorption spectra of adenine, 9-methyladenine and 2-aminopurine in helium nanodroplets have been recorded. In contrast to molecular beam experiments, large variations in linewidths are observed for adenine and 9-methyladenine. At the same time, the spectrum of 2-aminopurine remains sharp upon solvation in helium droplets. The line broadening observed for adenine and 9-methyladenine is attributed to a significant decrease of the lifetime of the 1Lb(ππ*) state and of 1nπ* levels vibronically coupled to this state. The origin of the lifetime reduction is argued to be related to the increased accessibility of the 1nπ*/1Lb(ππ*) conical intersection upon solvation of these molecules in liquid helium.

Original languageEnglish
Pages (from-to)15600-15606
Number of pages7
JournalPhysical Chemistry Chemical Physics
Volume12
Issue number48
DOIs
Publication statusPublished - 28 Dec 2010
Externally publishedYes

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