Selective and sensitive fluorescence chemosensor for the hypochlorite anion in water.
Based on an oxidized irreversible ring-opening process of the spirolactam of rhodamine 6G to turn on the fluorescence pathway, a highly sensitive, selective fluorescent and easy accessible chemosensor for ClO(-) has been reported. Upon reaction of the chemosensor with ClO(-) ions, a fluorescent enhancement factor over 60-fold is observed. The chemosensor shows a remarkably high selectivity to discriminate between ClO(-) and other ROS, such as H(2)O(2), TBHP etc., and a wide range of the environmentally and biologically relevant anions and metal ions. The oxidized irreversible ring-opening process of the chemosensor also triggers a visible colorimetric change from colorless to pink, leading to production of both "naked-eye" and fluorimetric detection of ClO(-) anion. The detection limit is estimated to be 2 × 10(-8) M based on a signal-to-noise ratio of 3:1 method. The chemosensor can be used within a pH span of 6-11.5. The chemosensor also shows excellent performance in natural water samples.
Key Laboratory of Display Materials & Photoelectric Devices, Ministry of Education, School of Materials Science & Engineering, Tianjin University of Technology, Tianjin 300384, China.
Fangfang
F
Wei
Yan
Y
Lu
Song
S
He
Liancheng
L
Zhao
Xianshun
X
Zeng
D002623:Chemistry Techniques, Analytical / Q000295:instrumentation*; D005456:Fluorescent Dyes / Q000138:chemical synthesis / Q000737:chemistry*; D006834:Hydrazines / Q000737:chemistry; D006997:Hypochlorous Acid / Q000032:analysis* / Q000737:chemistry*; D010084:Oxidation-Reduction; D012235:Rhodamines / Q000138:chemical synthesis / Q000737:chemistry*; D013141:Spiro Compounds / Q000737:chemistry; D013379:Substrate Specificity; D014867:Water / Q000737:chemistry*
D005456:Fluorescent Dyes; D006834:Hydrazines; D012235:Rhodamines; D013141:Spiro Compounds; C026188:rhodamine 6G; D014867:Water; C029424:hydrazine; D006997:Hypochlorous Acid