IRON(III) SELECTIVE FLUORESCENCE PROBE BASED ON PERYLENE TETRACARBOXYLIC DIIMIDE

摘要

Responses of organic uorophore, perylenediimide derivativeN,N'-di[3-[2-(3-thienyl)ethyl]phe-nyl]perylene-3,4,9,10-to-(dicarboxyimide) (PDIl)was investigated in polymer matrix of polyvinyl chloride (PVC) by emission spectrometry. Its response to Fe(III) ions was evaluated in terms of the effect of pH. The properties of time dependent response, reversibility, limit of detection, linear concentration range for the metal ion and repeatability characteristics of the sensing element also have been studied. The offered sensor exhibited remarkable uorescence intensityquenching at pH 6.0 in the concentration range of1x10~(-6) to 2.5 x10~(-3) M Fe(III) ions. The reproducibility of the sensor membrane was investigated by alternately changing the solution between1x10~(-4) M Fe(III)in Na_2HPO_4 (4 x10~(-2) M)and NaH_2PO_4 buffer (2 x10~(-3) M).