Figure 5. The TA image and the corresponding TA spectra of D18:OC4-4Cl-Ph -based film with various decay times under 800 nm excitation (a and d); The TA image and the corresponding TA spectra of D18:OC4-4Cl-Th based film with various decay times under 800 nm excitation (b and e); The TA image and the corresponding TA spectra of D18:OC4-4Cl-C8 based film with various decay times under 800 nm excitation (c and f); Kinetic traces of the blend films at the selected wavelength under 800 nm excitation (g, h, i).