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We synthesized a new cyanide (CN−) chemosensor CX based on a nucleophilic addition reaction prompted by cyanide ion, which could be used for highly selective and sensitive fluorescence turn‐on detection of cyanide in aqueous media. The CX showed selective fluorescence recognition for CN−, the miscellaneous competitive anions (F−, Cl−, Br−, I−, AcO−, H2PO4−, HSO4−, ClO4−, S2−, PO43−, CO32− and SCN−...
A long wavelength emission fluorescent (612 nm) chemosensor with high selectivity for H2PO4− ions was designed and synthesized according to the excited state intramolecular proton transfer (ESIPT). The sensor can exist in two tautomeric forms ('keto' and 'enol') in the presence of Fe3+ ion, Fe3+ may bind with the 'keto' form of the sensor. Furthermore, the in situ generated GY‐Fe3+ensemble could...
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