Transient EPR (trEPR) is an extremely useful EPR method that is able to identify and measure lifetimes of short-lived paramagnetic states. States with nanosecond lifetimes can be detected with the current trEPR setup. The Avalos lab has used the trEPR spectrometer to measure excited state species of a pentacene chromophore tethered TEMPO radical. An excitation of 650 nm from a nanosecond pulsed laser is utilized to excite the species. The attached spectrum shows the evolution of the spin state over time, scanned at different magnetic field positions. Via analysis of individual time slices, the Avalos lab has identified that the signal matches a long-lived doublet polarization, centered on the TEMPO radical. A long-lived spin polarization such as this can be utilized for increasing NMR sensitivity via dynamic nuclear polarization.