Perylenediimide promoted charge transfer in tetracyano butadiene–triphenylamine (TCBD–TPA) and expanded-tetracyano butadiene–triphenylamine (DCNQ–TPA) push–pull conjugates

Abstract

The significance of perylenediimide (PDI) in promoting excited charge transfer in push–pull systems carrying TCBD–TPA and DCNQ–TPA, synthesised via Pd(II)-catalysed Sonogashira cross-coupling reaction followed by [2+2] cycloaddition retroelectrocyclization (CA–RE) reaction, is demonstrated using femtosecond transient absorption and other pertinent methods.