Publications

Abstract : The synthesis of a novel pyrazole-cored push-pull system (Donor-Acceptor-Donor/D-A-D) in which thiophene serves as the donor and N-substituted pyrazole ring serves as the acceptor moieties is reported. The photophysical and electrochemical properties of the synthesised compounds were investigated using UV–Visible spectroscopy, photoluminescence spectroscopy, and cyclic voltammetry (CV). The photophysical results indicate that all four compounds have unique absorption and emission behaviour in the solid-state compared with the solution (in CHCl3). The optical band gap was calculated from the absorption curve and ranged from 2.75 eV to 3.81 eV. According to the CIE colour coordinates, each compound can emit different colour ranges. The estimated electrochemical results (HOMO and LUMO energy values) by CV and the possibility of adaptable tuning of these results demonstrate that the target compounds can be used as a fresh emissive candidate for organic optoelectronics applications. The significance of push-pull architecture and the solid-state emission properties of the targeted compounds were also highlighted in this work.