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Hybrid supraparticles of carbon dots/porphyrin for multifunctional tongue-mimic sensors

Chinese Chemical Letters 2022年第5期33卷 2715-2720页

作者： Rong Hu xingchun zhai Yubin Ding Guoyue Shi Min Zhang School of Chemistry and Molecular Engineering Shanghai Key Laboratory for Urban Ecological Processes and Eco-RestorationShanghai Key Laboratory of Multidimensional Information ProcessingEngineering Research Centre for Nanophotonics and Advanced Instrument(Ministry of Education)East China Normal UniversityShanghai 200241China Department of Chemistry College of SciencesNanjing Agricultural UniversityNanjing 210095China

Supraparticles(SPs),such as assembly of inorganic components with organic,have made tremendous attention in biochemical analysis,which represents a novel but challenging research ***,a single-SPs multifunctional fluorescent sensor array has been developed for high-throughput detection of heavy metal ions in biofluids,which is based on an inorganic/organic hybrid SPs consisting of carbon dots(CDs)and an easily available porphyrin[5,10,15,20-tetra(4-carboxyphenyl)porphyrin(TCPP)].TCPP can aggregate with the CDs to form the assembly(CDs/TCPP SPs)through the electrostatic andπ-πstacking *** are two independent and clearly separated fluorescence emission peaks at 470 and 668 nm in the resultant CDs/TCPP SPs under 380 nm *** a proof-of concept design,F 470,F 668,F 668/F 470 of SPs are chosen as three sensor components to constitute our sensor *** the addi-tion of metal ions,three sensor components can generate different fluorescence response patterns for discriminating 11 heavy metal ions via principal component analysis(PCA).Additionally,thiols can read-ily capture Cu^(2+)to switch the fluorescence of CDs/TCPP initially altered by Cu^(2+).Hence,CDs/TCPP-Cu^(2+)ensemble is further demonstrated to be a powerful sensor array for pattern recognition of 7 thiols and even chiral recognition of cysteine *** novel strategy avoids the tanglesome synthesis of multiple sensing probes and dedicates an innovative method for the facile establishment of tongue-mimic sensors,which would prospectively sprout more homologous assumptions to broaden its application toward more biosensing fields.

关键词： Supraparticles Carbon dots Porphyrin Pattern recognition sensor array Heavy metal ions Thiols

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