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

Abstract

Abstract A fluorescence probe was designed using nitrogen-contained mesoporous hyper-cross-linked polymer precursor (NH2-HCP) in order to selectively detect silver (Ag+) ions. NH2-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 Al3+, Fe3+, Cd2+, Ni2+, Cu2+, Fe2+, Hg2+, Mg2+, Zn2+, Pb2+, Mn2+, Co2+, Ca2+, 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.