Using a novel technique Fluorescent Optical Cycling (FOC), we can uncover photophysical properties of emitters using multiple excitation to prepare long lived states and simultaneously observe both fast and slow time-scale dynamics. This is accomplished by repeated timed laser pulse trains and subsequent laser off or wait times. Repeated excitations increases the incidence of uncommon events, such as intersystem crossing into triplet states or singlet oxygen sensitization, thus populating or "optically shelving" long-lived intermediate states.  Using picosecond to nanosecond pulsed lasers, we retain the ability to recover long-lived dynamics while maintaining short time resolution. In anti-boron clusters, FOC examines and uncovers many photophysical states and dynamics otherwise difficult to examine within one set of measurements. Following this, FOC will be implemented to directly examine the notoriously difficult to study shortwave infrared (SWIR) emitting singlet oxygen phosphorescence using Superconducting Nanowire Single Photon Detectors (SNSPDs) for state-of-the-art IR detection.

Accessing multi-state studies of singlet oxygen

Fall 2022 abstracts, posters, and presentations will launch in mid-September.

ACS Fall 2022

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.