首页|Zeolitic imidazolate framework-8 capped gold nanoclusters as an"on-off-on"fluorescent nanoprobe for sensitive detection of MnO4 and ascorbic acid
Zeolitic imidazolate framework-8 capped gold nanoclusters as an"on-off-on"fluorescent nanoprobe for sensitive detection of MnO4 and ascorbic acid
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NSTL
Herein,zeolitic imidazolate framework-8 capped gold nanoclusters(AuNCs@ZIF-8)was fabricated and developed as an"on-off-on"fluorescent nanoprobe for selectively and sensitively detecting KMnO4 and ascorbic acid(AA).The prepared AuNCs@ZIF-8 initially exhibited strong fluorescence at 595 nm KMnO4 could quench the fluorescence of AuNCs@ZIF-8,rendering the fluorescence signal of AuNCs@ZIF-8 in the"off state.The probe allows KMnO4 to be detected with a 10 nM detection limit and the linear analytical range was 0.05-2 uM.When AA was added into the AuNCs@ZIF-8/KMnO4 system,the fluorescence of the AuNCs@ZIF-8 recovered due to the redox reaction between KMnO4 and AA,and the fluorescence signal of the system turned"on".The detection limit of AA was 37 nM in a good linear concentration range of 0.05-5 uM.Furthermore,this AuNCs@ZIF-8 nanoprobe was successfully used for AA detecting in fresh orange juices with the recoveries ranged from 96.6% to 108.2%,which validates the potential applicability of this strategy.
NSTL
