Research articles
ScienceAsia (): 278-282 |doi:
10.2306/scienceasia1513-1874...278
Using 5,10,15,20-tetra(4-nitrophenyl)porphyrin as a fluorescent chemosensor to determine Ru3+
Tienkul Kangwanwonga, Wanchai Pluempanupata, Waraporn Parasuka, Helen E. Keenanb, Apisit Songsasena,*
ABSTRACT: The 5,10,15,20-tetra(4-nitrophenyl)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 Ru3+ with higher selectivity than other ions such as Hg2+, CH3Hg+, Ag+, Co2+, Cd2+, Ni2+, Cr3+, Fe3+, Cu2+, or Zn2+. 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 (Kstab=2.04 × 108). The synthesized fluorescence chemosensor can be used to determine Ru3+ with a detection limit of 0.89 µM (90 ppb) and a linear quantification range between 3 and 25 µM. Therefore, the synthesized chemosensor could be used as a new fluorescence chemosensor for the quantitative analysis of Ru3+ with satisfactory results.
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Department of Chemistry and Centre for Innovation in Chemistry, Faculty of Science, Kasetsart University, Bangkok 10900 Thailand |
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David Livingstone Centre for Sustainability, Department of Civil Engineering, University of Strathclyde, Glasgow, Scotland G1 1XN, United Kingdom |
* Corresponding author, E-mail: fsciass@ku.ac.th
Received 11 Jan 2012, Accepted 12 Jun 2012
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