Polycyclic aromatic hydrocarbon-substituted push–pull chromophores: An investigation of optoelectronic and nonlinear optical properties using experimental and theoretical approaches
Polycyclic aromatic hydrocarbon-substituted push–pull chromophores: An investigation of optoelectronic and nonlinear optical properties using experimental and theoretical approaches
A series of new push–pull chromophores were synthesized in moderate to very high yields (65%–97%) by treating TCNE and TCNQ with alkynes substituted by electron-rich diethylaniline and polycyclic aromatic hydrocarbons. Some of the chromophores exhibit strong intramolecular charge-transfer bands in the near-IR region with λmax values between 695 and 749 nm. With the help of experimental and theoretical analysis, it is concluded that the trend in λmax values is affected by PAH substituents sterica