A highly selective fluorescent chemosensor for Cu²⁺ based on a diarylethene with a 2,1,3‐benzoxadiazole unit

Abstract

A novel photochromic diarylethene containing a 2,1,3-benzoxadiazole structure has been synthesized and its multicontrollable fluorescence properties have been systematically studied by the stimulation of light and metal ions. The compound exhibited favorable photochromism and fluorescent switching properties. Furthermore, it can serve as a fluorescent chemosensor for highly selective recognition of Cu 2+ in aqueous acetonitrile. When triggered by Cu 2+ , it displayed a remarkable blue shift from 594 to 524 nm (70 nm) with a significant fluorescence color change from yellow to bright green. As a result, a logic circuit has also been constructed on the basis of light and chemical stimulation.

A multi-responsive diarylethene chemosensor via salicylaldehyde linking fluorescein unit

“…Copper also assists the formation of crosslinks in collagen, thereby maintaining and mending connective tissue. [5][6][7] However, excessive copper is toxic and will induce neurodegenerative diseases, including familial amyotrophic lateral sclerosis, Menkes and Wilson's disease, prion diseases and Alzheimer's disease. [8] Therefore, it is important to design a uorescent sensor that speci cally recognizes Cu 2+ .…”