Why water makes 2-aminopurine fluorescent?

Chemistry

• 2-Aminopurine 100%
• Amino Groups 23%
• Energy Barrier 13%
• Environment 7%
• Excited State 10%
• Internal Conversion 51%
• Intersystem Crossing [Singlet->triplet] 15%
• Luminiscence Type 19%
• Molecular Cluster 8%
• Molecule 19%
• Nucleic Acid 11%
• Probe 8%
• Proton Transfer 12%
• Purine 13%
• Simulation 8%

Physics & Astronomy

• energy 4%
• excitation 6%
• hydrogen 8%
• internal conversion 50%
• intersections 41%
• life (durability) 9%
• luminescence 20%
• molecules 29%
• nucleic acids 18%
• probes 8%
• protons 8%
• purines 20%
• simulation 5%
• tuning 10%
• water 39%