Influence of hydrogen bonding on twisted intramolecular charge transfer in coumarin dyes: an integrated experimental and theoretical investigation

Key Points

• C30 exhibits twisted intramolecular charge transfer (TICT), enhancing its photophysical properties while C7 remains planar.
• Spectroscopic evidence shows the influence of hydrogen bonding in coumarin dyes on their electronic behavior and charge transfer.
• Theoretical calculations further support the experimental findings, providing a cohesive understanding of the molecular interactions.
• Understanding these dynamics may have implications for the design and application of coumarin-based materials in photonic devices.