Cost-effective diagnostic kits for selective detection of gaseous H2S. (24th August 2021)

• Record Type: Journal Article
• Authors: Singh, Prabhpreet; Kaur, Navdeep
• Is Part Of: New journal of chemistry. Volume 45:Number 36(2021)
• Page Start: 16784
• Page End: 16793
• Publication Date: 2021-08-24
• Subjects: Chemistry -- Periodicals; Chimie -- Périodiques; 540
• DOI: 10.1039/d1nj02352g
• Languages: English
• ISSNs: 1144-0546

Abstract

Abstract : Unsymmetrical tri-functionalized perylene diimide dyes were explored for making solution- and solid-state-based colorimetric kits for the detection of gaseous and aqueous H2 S. Abstract : Bay -functionalization of perylene diimide (PDI) dyes provides the scope for modulating the optical properties of PDI. Symmetrical functionalization at the 1, 7-position of the bay -region of PDI offered limited scope for the tunability of photophysical properties, whereas unsymmetrical functionalization at the bay -position met with limited success. We have synthesized unsymmetrical bay -functionalized PDI 3 bearing –OCH3 and –NO2 substituents and studied its properties using the UV-Vis technique, powder X-ray diffraction, thermogravimetric method and NMR spectroscopy. PDI 3 selectively responds to thiols such as H2 S, Cys, and Hcy with discriminative behaviour among them. We fabricated several colorimetric kits for the detection of gaseous and aqueous H2 S: (a) solution-based colorimetric kits using PDI 3 offer high-resolution colour change with different concentrations of H2 S with initial to final colour change from purple to green and (b) PDI 3 impregnated silica nanoparticle and TLC strip/paper-based solid-state colorimetric kits. These colorimetric kits can find potential applications in checking the spoilage of food materials and detecting intracellular H2 S.