Core-wing modulated squaraines with enhanced two-photon absorption and efficient photothermal eradication of bacteria

Key Points

• This research aims to explore the effects of core-wing structural modulation on the properties of squaraines for effective photothermal applications.
• Synthesis of two series of indolenine-based squaraines
• Investigation of structure-property relationships
• Evaluation of two-photon absorption capabilities
• Assessment of photothermal efficacy against bacteria
• Enhanced two-photon absorption observed in modified squaraines
• Demonstrated efficient photothermal eradication of bacteria
• Established predictable structure-property relationships in the tested squaraines