Fig. 7: Femtosecond time-resolved transient absorption (fs-TA) measurements in the near-infrared region of TPC-3D.

a, b Femtosecond TA spectra in the 800–1200 nm range of TPC-3D under (a) air and (b) O2 atmosphere. c Comparison of TA kinetic profiles at 1000 nm under air and O2 conditions, respectively. d Decay lifetimes under O2 and air conditions fitted by the tri-exponential function from corresponding TA kinetic traces at 1000 nm.