A fluorescent chemosensor for silver ions based on porphyrin compound with high selectivity

Area of Science:

• Analytical Chemistry
• Materials Science
• Environmental Science

Background:

• Development of sensitive and selective chemosensors for metal ion detection is crucial for environmental monitoring.
• Porphyrin derivatives offer promising platforms for fluorescent sensing applications due to their unique photophysical properties.

Purpose of the Study:

• To design and synthesize meso-tetra(p-methoxylphenyl)porphyrin (T(p-OCH(3))PPH(2)) for fluorescent detection of silver ions (Ag(I)).
• To develop a T(p-OCH(3))PPH(2)-based fluorescent chemosensor for Ag(I) quantification in aqueous solutions.
• To evaluate the analytical performance and selectivity of the developed chemosensor.

Main Methods:

• Synthesis of meso-tetra(p-methoxylphenyl)porphyrin (T(p-OCH(3))PPH(2)).
• Investigation of fluorescence quenching mechanism upon complexation with Ag(I) at a 1:1 ratio.
• Fabrication and characterization of the Ag(I)-sensitive fluorescent chemosensor.

Main Results:

• The T(p-OCH(3))PPH(2) chemosensor exhibited a linear detection range for Ag(I) from 1.0 x 10(-7) to 5.0 x 10(-5)M, with a detection limit of 2.5 x 10(-8)M.
• The sensor's response to Ag(I) was pH-independent within the range of pH 4.0-8.0.
• Remarkable selectivity for Ag(I) was observed even in the presence of high concentrations of other metal ions.

Conclusions:

• The synthesized T(p-OCH(3))PPH(2) serves as an effective fluorescent chemosensor for sensitive and selective Ag(I) detection.
• The chemosensor's robustness and selectivity make it suitable for practical applications in environmental water sample analysis.
• This study highlights the potential of porphyrin-based materials in developing advanced analytical tools for environmental monitoring.