Tandem generation of isocoumarins in hollow microporous organic networks: nitrophenol sensing based on visible light

Hollow microporous organic networks bearing isocoumarin moieties (H-IC-MONs) were prepared via a tandem synthetic approach. Pd catalysts conducted the networking of building blocks by the Sonogashira coupling with the concomitant generation of isocoumarins through cyclization. The H-IC-MONs showed visible light absorption and emission properties and were applied to nitrophenol sensing using visible light.