A ratiometric fluorescent tag based on dual-emissive hydrophobic carbon dots for in-situ monitoring of seafood freshness

Anal Chim Acta. 2023 Apr 15;1250:340931. doi: 10.1016/j.aca.2023.340931. Epub 2023 Feb 1.ABSTRACTA ratiometric fluorescent tag based on dual-emissive hydrophobic carbon dots (H-CDs) with well volatile base nitrogens (VBNs)-response was fabricated, offering the in-situ, real-time, and visual evaluation of seafood freshness. The presented H-CDs aggregates exhibited a sensitive response to VBNs, with a limit of detection of 7 μM and 137 ppb for spermine and ammonia hydroxide, respectively. Subsequently, a ratiometric tag was successfully fabricated by depositing dual-emissive CDs on cotton paper. Upon the treatment with ammonia vapour, the presented tag exhibited highly recognizable colour variations from red to blue under UV light. In addition, the cytotoxicity was explored by CCK8 assay, and the results proved the nontoxicity of the presented H-CDs. To our knowledge, this is the first ratiometric tag based on dual-emissive CDs with aggregation-induced emission properties for recognition of VBNs and seafood freshness in a real-time and visual manner.PMID:36898807 | DOI:10.1016/j.aca.2023.340931

Source: Analytica Chimica Acta - March 10, 2023 Category: Chemistry Authors: Wenyang Zhang Da-Wen Sun Ji Ma Anjun Qin Ben Zhong Tang Source Type: research