Stuttgart 2012 – scientific programme
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MO: Fachverband Molekülphysik
MO 11: Biomolecules
MO 11.3: Talk
Tuesday, March 13, 2012, 14:30–14:45, V38.02
Excited states lifetimes of riboflavin derivatives in solution — •Yvonne Schmitt1, Madina Mansurova2, Wolfgang Gärtner2, and Markus Gerhards1 — 1TU Kaiserslautern,Physikal.&Theoret. Chemie,67663 Kaiserslautern — 2MPI für Bioanorganische Chemie, 45470 Mülheim a. d. Ruhr
Riboflavin has a wide spread field of applications in biology. It reaches from human beings where it is a part of the FAD and FMN, to animals where it is part of the so called cryptochromes and plants in which it supports the execution of photosynthesis. From the spectroscopic point of view riboflavin has interesting features because it can exist in three redox states and different electronic states with different structures. The free rotating ribitiyl chain can lead to different isomers and it is in discussion if these different build ups of riboflavin are important for its functionality. To characterize different electronic states and structures of the molecule infrared, absorption, fluorescence and fluorescence lifetime measurements are applied in addition to quantum mechanical calculations. In this contribution the attention is turned to derivatives of riboflavin since riboflavin exists in nature mostly in a modified form. The electronically excited states and their lifetimes are characterized in different solvents and compared to the spectroscopic features of pure riboflavin.