ICT-Based Fluorescent Nanoparticles for Selective Cyanide Ion Detection and Quantification in Apple Seeds

IF 3.6 3区化学 Q2 CHEMISTRY, ANALYTICAL

Analyst Pub Date : 2024-12-04 DOI:10.1039/d4an01265h

Upendar Reddy Gandra, Rabindranath Lo, Praveen Managutti, Abdul Mannan Butt, Pogula Sreekanth Reddy, Ahsanulhaq Qurashi, Sharmarke Mohamed, Mohamed Infas Haja Mohideen

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Abstract

Cyanide is a highly toxic anion. Nonetheless, many food plants and seeds could produce endogenous cyanide, which causes great danger to human health. Thus, monitoring cyanide in food samples is critically significant. In this report, we successfully engineered a novel probe based on an acceptor-donor-acceptor (A-D-A) architecture featuring dicyanovinyl-substituted thieno[3,2-b]thiophene, termed DCVTT. The designed probe self-assembles into luminous nanoparticles (DCVTT NPs) upon introducing mixed aqueous solutions. These fluorescent nanostructures served as a ratiometric probe for detecting cyanide (CN-) ions in aqueous-based environments, owing to the robustIntramolecular Charge Transfer (ICT) characteristics of DCVTT. The A-D-A substituents in DCVTT significantly enhanced ICT behavior by promoting more efficient electron transfer between the donor and acceptor groups. This improved electron transfer process leads to heightened sensitivity in detection applications. In the case of cyanide (CN) sensing, this enhanced ICT behavior manifests as a strong colorimetric response, allowing for a visible color change before and after interaction with cyanide. Speculation regarding the interaction mechanism between DCVTT and CN- is proposed based

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