Investigating effective fluorescence strategies for real-time monitoring of dipicolinic acid (DPA) is of paramount importance in safeguarding human health. Herein, we present the design of a desirable red emissive carbon...
Polyvinyl alcohol-capped citrate-stabilized gold nanoparticles, functionalized with newly synthesized Schiff base derived from 3,4-diaminotoluene and benzaldehyde, to determine Hg2+ ions with HOMO–LUMO orbital study.
The advantages of porosity and stable unpaired electrons of porphyrinic organic polymers (POPs) with free radicals are exclusive and potentially practical functionalities and combining the semiconductor-like characteristics of these materials and metal ions has been an effective way to assemble an efficient photocatalytic system. Herein, a new ruthenium (Ru) ionencapsulated porphyrinic organic polymer (POP/Ru) is facilely synthesized as a proper photoresponsive nanozyme with unique photo-oxidase properties. Surprisingly, the proposed POP/Ru revealed outstanding photoresponsive oxidase-mimicking activity due to the synergetic effect of the integration of Ru and π-electrons of POP, which boosts charge separation and transport. POP/Ru was applied to the oxidation of o-phenylenediamine (o-PDA) as a chromogenic probe for producing a colorimetric signal. The kinetic study reveals that these photo-oxidase mimics have a significant affinity for the o-PDA chromogenic agent owing to a lower K m and superior V max . Further findings demonstrate that the presence of the Larginine (L-Arg) target causes an inhibition effect on the photo-nanozymatic colorimetry of POP/Ru. This research develops the applications of the comprehensive colorimetric strategy for ultrasensitive L-Arg monitoring with a limit of detection (LOD) of 15.2 nM in the dynamic range of 4.0 nM−340 μM and illuminates that the proposed photo-oxidase nanozyme as a visual strategy is feasible in L-Arg environmentally friendly colorimetric detection in juice samples.
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