Direct Measurement of Intramolecular Electron Transfer in a Series of Artificial Photosynthesis Processes Ken Onda, Kei Ohkubo, Yasuomi Yamazaki, Kazuhide Koike, Sei’ichi Tanaka and Osamu Ishitani EPJ Web Conf., 205 (2019) 09037 Published online: 16 April 2019 DOI: 10.1051/epjconf/201920509037