Recently, the rhodamine derivatives have received great interest
due to its chemosensing property. The distinct color and fluorescent
changes due to spirolactum ring opening make these derivatives
more important for the sensing of a variety of metal cations.
Interestingly, various photometry or fluorometry based sensors
specific for detection of Fe (III) have been reported [17–20]. But till
now, there are no text reports concerning the rhodamine dimer
based electrochemical sensors for iron (III) ions. In sight of the
importance of selective determination of Fe (III) ions, we have made
an attempt to develop the voltammetric as well as potentiometric
sensors for selective recognition of Fe (III) ions based upon new
electroactive rhodamine dimer, which undergoes electrochemical
changes in the presence of Fe (III) ions. The proposed voltammetric
and potentiometric sensors have been effectively applied to detect
the Fe (III) ions content in various sample matrices. The obtained
results were compared with atomic absorption spectroscopy (AAS)
and were found in good agreement with each other.