S1 Supporting Information Singlet Energy Transfer in Anthracene-Porphyrin Complexes – Mechanism, Geometry and Implications for Intramolecular Photon Upconversion Fredrik Edhborg, Betül Küçüköz, Victor Gray † , Bo Albinsson* Chalmers University of Technology, Department of Chemistry and Chemical Engineering, Gothenburg, Sweden. † Present address: Cavendish Laboratory, University of Cambridge, J. J. Thomson Avenue, Cambridge, UK; * Corresponding author: balb@chalmers.se Contents fs-Transient Absorption .......................................................................................................................... 2 Absorption and emission spectra ............................................................................................................ 2 Electron transfer ...................................................................................................................................... 2 Lifetime and rate of singlet energy transfer ............................................................................................ 4 Density functional theory and molecular coordination geometry ........................................................... 7 Simulated FRET and Dexter contribution ............................................................................................ 11 Orientation factor .................................................................................................................................. 11 References:............................................................................................................................................ 12