Using 5,10,15,20-tetra(4-nitrophenyl)porphyrin as a fluorescent chemosensor to determine Ru3+

porphyrin (TNPP) has been synthesized using the reaction of pyrrole and 4-nitrobenzaldehyde in the presence of propionic acid. The TNPP was used as a new fluorescent chemosensor to determine Ru 3+ with higher selectivity than other ions such as Hg 2+ , CH3Hg + , Ag + , Co 2+ , Cd 2+ , Ni 2+ , Cr 3+ , Fe 3+ , Cu 2+ , or Zn 2+ . The response of the new chemosensor is reported in the form of fluorescence quenching, which is attributed to the metalloporphyrin formation of Ru-TNPP complex with 1:1 stoichiometric ratio (K stab = 2.04 10 8 ). The synthesized fluorescence chemosensor can be used to determine Ru 3+ with a detection limit of 0.89 M (90 ppb) and a linear quantification range between 3 and 25 M. Therefore, the synthesized chemosensor could be used as a new fluorescence chemosensor for the quantitative analysis of Ru 3+ with satisfactory results.