Mechanism of UV-Induced Formation of Dewar Lesions in DNA
Journal article published in 2011 by
Karin Haiser,
Benjamin P. Fingerhut,
Korbinian Heil,
Andreas Glas,
Teja T. Herzog,
Bert M. Pilles,
Wolfgang J. Schreier,
Wolfgang Zinth,
Regina de Vivie-Riedle,
Thomas Carell 
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Abstract
The importance of a backbone: The mechanism of formation of Dewar lesions has been investigated by using femtosecond IR spectroscopy and ab initio calculations of the exited state. The 4π electrocyclization is rather slow, occurs with an unusual high quantum yield, and--surprisingly--is controlled by the phosphate backbone.