Abstract
Tin is a crucial trace element in the human body, playing a significant role in various physiological activities and overall human health. In this study, we present a novel fluorescent probe (CDM) capable of detecting Sn2+ through both colorimetric and fluorometric channels. The probe allows for visual detection by the naked eye and exhibits long-wavelength fluorescence emission. With a detection limit of 4.72 × 10−8 M and 9.95 × 10−9 M, respectively, CDM surpasses the World Health Organization's specified limit of 8.4 × 10−4 M and outperforms previously reported probes. As far as we know, this is the first fluorescent probe to enable naked-eye and long-wavelength emission-based detection of Sn2+. Additionally, a smartphone-based sensing platform was developed to recognize Sn2+. CDM not only demonstrates sensitive detection of Sn2+ in common food products but also successfully imaging Sn2+ in 4T1 cells, Caenorhabditis elegans, and mice.
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