We studied the synthesis and electrochemical properties of symmetric squarylium dyes (SQDs) containing diarylamine with various structures. It was shown that several of our synthesized SQDs had improved electrochemical properties and might be a promising and an easy modifiable π-conjugate core block of active materials for electroactive and photoactive devices.
series of symmetric squarylium dyes (SQDPA‐X) with different halogen (X=F, Cl, Br, I) substituents have been developed. The photophysical properties could be facilely tuned by the halogen modulation effects. The strategy of incorporating different halogen substitutions into AIE active luminogens enables a facile approach for exploring new intriguing organic fluorescent dyes.