Protein-Localized Bright-Red Fluorescent Gold Nanoclusters as Cyanide-Selective Colorimetric and Fluorometric Nanoprobes.

ABSTRACT: Herein, we describe a bright-red-emitting ovalbumin-protected gold nanoclusters (OVA-AuNCs) that were prepared and applied as a luminescent probe for a simple, rapid, and highly sensitive determination of cyanide ions (CN^- ions) based on an emission quenching and colorimetric method. Initially, an intense red-emissive fluorescence of the OVA-AuNCs successfully disappeared upon the addition of CN^- ions. The resultant emission-quenching process involved CN^- ions etching the OVA-AuNC surface, which produced AuCN₂ ^- complexes in the presence of ambient oxygen. Under optimized experimental conditions, the relative emission intensity is inversely relative to CN^- ion concentrations ranging from 5.00 × 10^-7 to 75.00 × 10<

SUBMITTER: Rajamanikandan R 

PROVIDER: S-EPMC6644394 | biostudies-literature | 2018 Oct

REPOSITORIES: biostudies-literature