Title

Investigating the Solution Phase Fluorescence Quenching in a Graphene Oxide Derivative in the Presence of Tetracene

Author: Risini Chathma, Neranga Abeyasinghe

Introduction / Background

• Fluorescence quenching provides insight into molecular interactions and energy transfer mechanisms.
• Key for improving optoelectronic devices, solar cells, and semiconductors.
• Contributes to SDG 7 (Clean Energy) and SDG 12 (Sustainable Consumption & Production).

• To investigate quenching of GO derivative fluorescence by tetracene.
• To identify energy transfer mechanisms involved.

• Synthesis: GO derivative via modified Hummers’ method
• Sample preparation: Mixture of GO + tetracene and two control samples at equal concentrations.
• Characterization techniques:
  • UV-Vis absorption spectroscopy
  • Fluorescence spectroscopy
  • Raman spectroscopy
  • Quantum yield measurement (Fluorescein as standard)

 

 

 

Results

• GO emission peaks has disappeared in the mixture.
• Quantum yield decreased, confirming quenching.

• Quenching arises from reabsorption, vibronic coupling, and energy transfer.
• Mechanism demonstrates potential for efficient energy conversion in materials.

 

Conclusion

• Tetracene effectively quenches the fluorescence of GO derivatives through energy transfer.
• Findings support the design of sustainable optoelectronic materials and advanced energy technologies.