A bis-guanidine-based multisignaling sensor molecule that displays redox-ratiometric behavior or fluorescence enhancement in the presence of anions and cations

摘要

The guanidine bridge in the new structural motif [3,3]ferrocenophane acts as a dual binding site for anions and metal ions. Sensing of anions (Cl-, F-, NO3-, HSO4-, and H2PO4-) takes place by redox-ratiometric measurements, whereas metal ion (Zn2+, Ni2+, and Cd2+) recognition is achieved by fluorescence measurements.