If the S 1 -→ T 1 ISC takes place, the T 1 population would eventually reside at a structure near BLA=0.12 , since it corresponds to the T 1 minimum. As the majority of excited state populations stay at the vicinity of S 1min 22 and the S 1 -T 1 crossing is at the proximity of the S 1 minimum, even if the SOC between T 1 and S 1 near S 1min is small ∼ 3 cm -1 , there is a chance for the S 1 to T 1 ISC due to frequent sampling of the S 1 -T 1 crossing region during excited state dynamics.