Donor-acceptor functionalized Aza-BODIPY derivatives

Abstract

Aza–boron–dipyrromethene (Aza–BODIPY) is a hetero–atom substituted boron–dipyrromethene (BODIPY), in which a carbon atom present at the meso–position is replaced by a nitrogen atom. Aza–BODIPYs show good optical and thermal stability. The donor-acceptor functionalized aza–BODIPY conjugates show lower HOMO– LUMO gap and absorption in near infra–red (NIR) region. Thus, such NIR absorbing materials can be used in various photonic and bio–applications such as bioimaging, sensors, therapeutics, organic light emitting diodes (OLEDs), organic photovoltaics, etc. In present work, we synthesized and characterized β–substituted aza–BODIPY derivatives by Palladium catalyzed Suzuki cross–coupling reaction. Also, the photophysical properties and theoretical calculations have been performed using the density functional theory (DFT) and time–dependent density functional theory (TD– DFT).