title: Quantum Yield of Cyclobutane Pyrimidine Dimer Formation Via the Triplet Channel Determined by Photosensitization.
abstract: UV-induced formation of the cyclobutane pyrimidine dimer (CPD) lesion is investigated by stationary and time-resolved photosensitization experiments. The photosensitizer 2'-methoxyacetophenone with high intersystem crossing efficiency and large absorption cross-section in the UV-A range was used. A diffusion controlled reaction model is presented. Time-resolved experiments confirmed the validity of the reaction model and provided information on the dynamics of the triplet sensitization process. With a series of concentration dependent stationary illumination experiments, we determined the quantum efficiency for CPD formation from the triplet state of the thymine dinucleotide TpT to be 4 ± 0.2%.
authors.affiliation: Lehrstuhl für BioMolekulare Optik, Fakultät für Physik and Center for Integrated Protein Science Munich CIPSM, Ludwig-Maximilians-Universität München , Oettingenstrasse 67, 80538 München, Germany.
authors.forename: Lizhe
authors.initials: L
authors.lastname: Liu
authors.affiliation: Lehrstuhl für BioMolekulare Optik, Fakultät für Physik and Center for Integrated Protein Science Munich CIPSM, Ludwig-Maximilians-Universität München , Oettingenstrasse 67, 80538 München, Germany.
authors.forename: Bert M
authors.initials: BM
authors.lastname: Pilles
authors.affiliation: Lehrstuhl für BioMolekulare Optik, Fakultät für Physik and Center for Integrated Protein Science Munich CIPSM, Ludwig-Maximilians-Universität München , Oettingenstrasse 67, 80538 München, Germany.
authors.forename: Julia
authors.initials: J
authors.lastname: Gontcharov
authors.affiliation: Lehrstuhl für BioMolekulare Optik, Fakultät für Physik and Center for Integrated Protein Science Munich CIPSM, Ludwig-Maximilians-Universität München , Oettingenstrasse 67, 80538 München, Germany.
authors.forename: Dominik B
authors.initials: DB
authors.lastname: Bucher
authors.affiliation: Lehrstuhl für BioMolekulare Optik, Fakultät für Physik and Center for Integrated Protein Science Munich CIPSM, Ludwig-Maximilians-Universität München , Oettingenstrasse 67, 80538 München, Germany.
authors.forename: Wolfgang
authors.initials: W
authors.lastname: Zinth