Jump to main content
Jump to site search
Access to RSC content Close the message box

Continue to access RSC content when you are not at your institution. Follow our step-by-step guide.


Issue 33, 2010
Previous Article Next Article

Excimer states in microhydrated adenineclusters

Author affiliations

Abstract

We present femtosecond pumpprobe mass and photoelectron spectra for adenine (A) and microhydrated Am(H2O)n clusters. Three distinct relaxation processes of photoexcited electronic states were distinguished: in unhydrated A, relaxation of the optically bright ππ* state occurred via the dark nπ* state with respective lifetimes of <0.1 and 1.3 ps. In microhydrated clusters A(H2O)n, relaxation via the nπ* state is quenched by a faster relaxation process, probably involving πσ* states. For the predominantly hydrogen-bonded adenine dimer (A2), excited state relaxation is dominated by monomer-like processes. When the adenine dimer is clustered with several water molecules, we observe a nanosecond lifetime from excimer states in π-stacked clusters. From the electron spectra we estimate adiabatic ionization potentials of 8.32 eV (A), 8.27 eV (A(H2O)1), 8.19 eV (A(H2O)2), 8.10 eV (A(H2O)3), 8.18 eV (A2), and 8.0 eV (A2(H2O)3–5).

Graphical abstract: Excimer states in microhydrated adenine clusters

Back to tab navigation

Article information


Submitted
08 Mar 2010
Accepted
21 Apr 2010
First published
16 Jun 2010

Phys. Chem. Chem. Phys., 2010,12, 9632-9636
Article type
Paper

Excimer states in microhydrated adenine clusters

V. R. Smith, E. Samoylova, H.-H. Ritze, W. Radloff and T. Schultz, Phys. Chem. Chem. Phys., 2010, 12, 9632
DOI: 10.1039/C003967E

Social activity

Search articles by author

Spotlight

Advertisements