PNNL

Abstract

We have demonstrated probing single-molecule metal-to-ligand charge transfer (MLCT) dynamics at room temperature. Using photon antibunching measurements under CW laser excitation, non-classical photon statistics, and excitation power dependent measurements, we were able to selectively measure the single-molecule MLTC state lifetime. This work demonstrated the first single-molecule photon antibunching of triplet excited state and presents a step forward in studying single-molecule electron transfer in proteins using MLTC complex as an electron transfer donor or acceptor.