Thiazolo[5, 4-d]thiazole based dye modified microspheres as metal nanoparticle reactor template and hybrid catalyst. (15th July 2022)

• Record Type: Journal Article
• Authors: Dikmen, Zeynep; Isık, Meliha; Turhan, Onur; Akbari, Melina; Tuncer, Cansel; Javanifar, Roshan; Bütün, Vural
• Is Part Of: European polymer journal. Volume 175(2022)
• Publication Date: 2022-07-15
• Subjects: Thiazolo[5, 4-d]thiazole -- hybrid catalyst -- reductant free MNP -- poly(4-vinyl benzylchloride); Polymers -- Periodicals; Polymerization -- Periodicals; Polymères -- Périodiques; Polymérisation -- Périodiques; Polymerization; Polymers; Periodicals; Electronic journals; 547.705
• DOI: 10.1016/j.eurpolymj.2022.111391
• Languages: English
• ISSNs: 0014-3057

Abstract

Graphical abstract: Highlights: PVBC microparticles for benzylation of Py2 TTz molecule to prepare MNP reactor template. PyTT usage as reducing agent for Ag +, Au 3+, Pt 2+ metal cations. AgNP decorated Py2 TTz-PVBC microparticles as hybrid catalyst for p-nitrophenol reduction. Abstract: 2, 5-di(pyridin-4-yl)thiazolo[5, 4- d ]thiazole (Py2 TTz) molecule was synthesized and used to modify poly(4-vinyl benzylchloride) microparticles (PVBC-MPs) thanks to its superior interaction with 4-vinyl benzyl chloride monomer containing active –Cl atom. PVBC spherical microparticles were successfully synthesized by suspension polymerization method and they were modified via two different approaches as in-situ and post-modification. Monodispersity of particles via in-situ modification is a challenging approach due to the low solubility of Py2 TTz. Therefore, post-modification of PVBC microparticles with Py2 TTz dye was carried out. The particles act as metal nanoreactor in the absence of any reducing agent both at room temperature and 50 °C. The particle morphology was determined with electron microscopies before and after reduction process. Metal nanoparticles (MNP) on MPs were characterized via XRD analysis. Gold, silver and platinum nanoparticles (AuNP, AgNP and PtNP) decorated microparticles were successfully synthesized. According to the ICP-MS results, 25.6% Ag, 24.7% Pt and 0.33% Au were found in the microparticles treated with metal cations. These MNP decorated MPs were used as hybrid heterogeneous catalyst for 4-nitrophenol reduction into 4-aminophenol. The highest catalytic efficiency was obtained with AgNPs decorated MPs as also consistent with the ICP-MS data. The catalytic activities of the MNP decorated MPs were determined with time dependent absorption measurents via UV–Vis spectrophotometer.