Nam, Haerim Kwon, Ji Eon Choi, Min-Woo Seo, Jangwon Shin, Seunghoon Kim, Sehoon Park, Soo Young 2024-01-20T04:32:53Z 2024-01-20T04:32:53Z 2021-09-04 2016-04 2379-3694 https://pubs.kist.re.kr/handle/201004/124240 A novel nitronyl-nitroxide derivative for highly sensitive and selective detection of ascorbic acid (AA) is reported. The probe showed 260-fold fluorescence turn-on and diminished electron spin resonance (ESR) signal upon AA addition. The probe could detect AA over a broad concentration range from 1 mu M to 2 mM and excellent selectivity over various antioxidants and acids through a combination of fluorescence and ESR responses, which originated from the dual reactiveness of dual-quenching group nitronyl-nitroxide. We successfully demonstrated practical application potential of the probe by preparing nanoparticles and sensor papers and determining AA concentration in real samples including vitamin drinks and orange juices. English AMER CHEMICAL SOC STABLE FREE-RADICALS QUANTUM-DOTS NANOPARTICLES MODULATION Highly Sensitive and Selective Fluorescent Probe for Ascorbic Acid with a Broad Detection Range through Dual-Quenching and Bimodal Action of Nitronyl-Nitroxide Article 10.1021/acssensors.5b00230 1 ACS Sensors, v.1, no.4, pp.392 - 398 ACS Sensors 1 4 392 398 scie scopus 000385464500012 2-s2.0-84994610136 Chemistry, Multidisciplinary Chemistry, Analytical Nanoscience & Nanotechnology Chemistry Science & Technology - Other Topics Article STABLE FREE-RADICALS QUANTUM-DOTS NANOPARTICLES MODULATION nitronyl-nitroxide ascorbic acid fluorescence electron spin resonance sensor