Nitrogen-contained nanoporous hyper-cross-linked polymer: A new turn-on fluorescence probe for detection of Ag+ ions in aqueous media

A fluorescence probe was designed using nitrogen-contained mesoporous hyper-cross-linked polymer precursor (NH 2 -HCP) in order to selectively detect silver (Ag + ) ions. NH 2 -HCP has a fluorescence intensity, but only upon the addition of Ag + , a significant enhancement in fluorescence signal is observed, and the relationship between fluorescence intensity enhancement and Ag + concentration exhibit a linear and monotonic trend. The probe's response to various other cations such as Al 3+ , Fe 3+ , Cd 2+ , Ni 2+ , Cu 2+ , Fe 2+ , Hg 2+ , Mg 2+ , Zn 2+ , Pb 2+ , Mn 2+ , Co 2+ , Ca 2+ , Na + , and K + was also investigated. Under optimal conditions, the probe demonstrated a linear range of 0.1-3 μM and a detection limit of 0.01 μM.