Convenient and selective “off–on” detection nitric oxide in solution and thin film with quinoline based fluorescence sensor

Quinoline based fluorescence sensor ( 1 ) was synthesized and characterized with mass spectra (MS), 1 H nuclear magnetic resonance ( 1 H NMR) spectrometer, elemental analyses, and infrared (IR) spectra. Following fluorescence experiments demonstrate 1 can coordinate with copper ions, and lead to fluorescence completely quenched. The 1 -copper complex was used as a “turn-on” fluorescence biosensor to convenient and highly effective detect nitric oxide (NO) over other radicals in solution and PCL-based thin film. The finding would enable the quinoline based fluorescence probe to be an “off–on” convenient NO fluorescence probe.