Photo-induced intramolecular charge transfer from antenna to anchor groups in phenoxazine dyes

► The energy absorbed by antenna group transfers to anchor groups through intramolecular charge transfer. ► Ultrafast time-resolved spectroscopy technique and TDDFT was used to study the intramolecular charge transfer process. ► The intra-molecular charge transfer in this phenoxazine dye is bi-exponential decay process.