TY - JOUR
T1 - An Easy Detection of Sulfide by an Imine-Bond Cleavage-Based Fluorescence Chemosensor
T2 - Smartphone and Paper-Strip Applications
AU - Song, Chanwoo
AU - Lee, Jae Jun
AU - Nam, Hyejin
AU - Kim, Cheal
N1 - Publisher Copyright:
© The Author(s), under exclusive licence to Korean Institute of Chemical Engineers, Seoul, Korea 2024.
PY - 2025/3
Y1 - 2025/3
N2 - We designed an imine-bond cleavage-based fluorescent chemosensor CDH ((E)-(5-chloro-2-((3,5-dichloro-2-hydroxybenzylidene)amino)phenyl)(phenyl)methanone) for detecting S2−. The sensor CDH selectively sensed S2− among various anions through fluorescent change. The fluorescent change was cyan turn-on from colorless with a high quantum yield (λex = 427 nm, Φ = 0.486), resulting in strong fluorescent intensity. With the result of Job plot, the reaction of S2− and CDH turned out to be a 1:1 interaction. The detection limit for S2− of CDH was 2.85 µM. The reaction process of S2− by CDH was demonstrated to be imine-bond cleavage through ESI-mass, 1H NMR titration, and theoretical calculations. Additionally, test-strip and smartphone applications were successfully constructed for S2− detection, and these findings revealed that CDH could be effectively utilized for sulfide sensing without sophisticated instruments.
AB - We designed an imine-bond cleavage-based fluorescent chemosensor CDH ((E)-(5-chloro-2-((3,5-dichloro-2-hydroxybenzylidene)amino)phenyl)(phenyl)methanone) for detecting S2−. The sensor CDH selectively sensed S2− among various anions through fluorescent change. The fluorescent change was cyan turn-on from colorless with a high quantum yield (λex = 427 nm, Φ = 0.486), resulting in strong fluorescent intensity. With the result of Job plot, the reaction of S2− and CDH turned out to be a 1:1 interaction. The detection limit for S2− of CDH was 2.85 µM. The reaction process of S2− by CDH was demonstrated to be imine-bond cleavage through ESI-mass, 1H NMR titration, and theoretical calculations. Additionally, test-strip and smartphone applications were successfully constructed for S2− detection, and these findings revealed that CDH could be effectively utilized for sulfide sensing without sophisticated instruments.
KW - DFT calculation
KW - Fluorescent chemosensor
KW - Imine bond cleavage
KW - Smartphone application
KW - Sulfide
KW - Test strip
UR - http://www.scopus.com/inward/record.url?scp=85212480354&partnerID=8YFLogxK
U2 - 10.1007/s11814-024-00334-8
DO - 10.1007/s11814-024-00334-8
M3 - Article
AN - SCOPUS:85212480354
SN - 0256-1115
VL - 42
SP - 669
EP - 678
JO - Korean Journal of Chemical Engineering
JF - Korean Journal of Chemical Engineering
IS - 3
M1 - 130576
ER -