p‐π Conjugate Triggered Red Room‐Temperature Phosphorescence from Single Benzene Derivatives

Abstract Benzene is the simplest and the most basic building block for the construction of π conjugated systems, which are widely used in various fields from fluorescent (FL) dyes to optoelectronic displays. However, achieving the red room‐temperature phosphorescence (RTP) from single benzene is still challenging. Utilizing the p‐π conjugation, herein, we report a single benzene‐based push‐pull system with red RTP under ambient condition. One of the phosphors shows maximum RTP peak at 585 nm, along with shoulder peaks at 545 nm, 635 nm, and 700 nm. This architecture is uniquely separate from conventional extended π‐conjugated systems and minimizes the requirement for red/near‐infrared (NIR) phosphors to a single benzene ring.