Charge-Dependent Modulation of S–H vs O–H Excited-State Intramolecular Proton Transfer

Key Points

• The aim is to quantitatively link charge redistribution to the behavior of excited-state intramolecular proton transfer (ESIPT).
• Utilized electronic coupling analysis to assess excited-state behavior.
• Investigated substituent effects on proton-transfer dynamics.
• Employed quantitative measurements of charge redistribution.
• Established a significant relationship between charge redistribution and ESIPT behavior.
• Demonstrated that substituent effects substantially influence proton transfer rates.
• Revealed that electronic interactions correlate with observed proton-transfer dynamics.