Phenanthroline-based copper complexes for water splitting applications : photo-physical and spectroscopic investigations / by Kai Stührenberg, M.Sc. ; [Board of Examiners: Prof. Dr. Thomas Kühne (Chairman), Prof. Dr. Matthias Bauer, PD Dr. Hans Egold, Prof. Dr. Hans Joachim Warnecke]. Paderborn, 2017