Fig. 2

The transient IR character of thin film of CN-Cz2, PO-T2T, and CN-Cz2:PO-T2T (1:1). The transient IR spectra of these three compounds at a delay time of 1.6 µs in different spectral range of (a) 1200–1700 cm⁻¹ and (b) 1700–3000 cm⁻¹. c An absorbance-frequency-time 3D plot for the CN-Cz2:PO-T2T (1:1). d The relaxation dynamics of 1570 and 2060 cm⁻¹, (e) 1508 and 1597 cm⁻¹, and (f) 1473 and 1489 cm⁻¹ peaks for the CN-Cz2:PO-T2T (1:1) film. λ_ex: 266 nm