Figure 2 (IMAGE) Kanazawa University Caption Upon addition of 1-MNA, the fluorescence intensity of P6A dramatically decreased because of photoinduced electron transfer. P6A also has high selectivity: P6A do not form host–guest complexes with nicotinamide and 2py. Credit Kanazawa University Usage Restrictions The image may only be used with appropriate caption and credit. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.