Electron Transfer in Metal‐Organic Molecules. A Time Resolved EXAFS and Optical Spectroscopy Study |
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| Authors: | Jie Chen Wei‐Kan Chen Peter M Rentzepis |
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| Institution: | 1. Key Laboratory for Laser Plasmas (Ministry of Education) and Department of Physics, Shanghai Jiao Tong University, Shanghai 200240, P. R. China;2. Department of Chemistry, University of California at Irvine, CA 92697, USA |
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| Abstract: | We have measured, by means of ultrafast x‐ray absorption and optical spectroscopy, the M‐O (M=Fe, Co) and Co‐N metal to ligand bond length change as a function of time and the formation and decay of the excited states and intermediate species, after excitation with a 267 nm femtosecond pulse. These experimental data combined with DFT calculations allowed us to determine the mechanism of electron transfer operating in the redox reaction of two metal‐ligand complexes, M(III)(C2O4)3]3‐ and Co(III)(NH3)6 ]3+. Based on the data we find that, even though both molecules are excited into their charge transfer band, the redox reaction of M(III)(C2O4)3]3‐ proceeds via intermolecular electron transfer while Co(III)(NH3)6 ]3+ electron transfer mechanism is intramolecular. |
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| Keywords: | Electron transfer Ultrafast x‐ray spectroscopy Metal‐organic molecule |
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