Synthesis and Use in Catalysis of Hematite Nanoparticles Obtained from a Polymer Supported Fe(III) Complex. Issue 7 (10th February 2022)

• Record Type: Journal Article
• Authors: Fiore, Ambra M.; Varvaro, Gaspare; Agostinelli, Elisabetta; Mangone, Annarosa; De Giglio, Elvira; Terzano, Roberto; Allegretta, Ignazio; Dell'Anna, Maria Michela; Fiore, Saverio; Mastrorilli, Piero
• Is Part Of: European journal of inorganic chemistry. Volume 2022:Issue 7(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-02-10
• Subjects: Hematite nanoparticles -- Heterogeneous catalysis -- Magnetic properties -- Nitroarenes -- Transfer hydrogenation; Chemistry, Inorganic -- Periodicals; Organometallic chemistry -- Periodicals; Bioinorganic chemistry -- Periodicals; Solid state chemistry -- Periodicals; 546
• DOI: 10.1002/ejic.202100943
• Languages: English
• ISSNs: 1434-1948

Abstract

Abstract: Weakly magnetic hematite (α‐Fe2 O3 ) nanoparticles were synthesized by heating an amorphous polymer supported iron(III) complex ( Fe_POL ) at 400 °C for 4 h in air. The growth of nanoparticles (NPs) was studied by PXRD, heating the polymer from 150 °C to 400 °C at 25 °C intervals, revealing that, at all temperatures, the only crystalline phase detected is hematite. Conversely, annealing of Fe_POL at 400 °C for 4 h under nitrogen, yielded a material containing wüstite (FeO) as the only crystalline phase, supported onto pyrolised acrylamidic polymer. The synthesized materials were characterized by TXRF, PXRD, SEM‐EDS, XPS, Raman and FTIR spectroscopy as well as by magnetic analysis. Differently from natural micrometric hematite, synthesised nano‐hematite turned out to be an efficient and recyclable catalyst for the hydrogenation of nitroarenes to the corresponding anilines. Abstract : Calcination of Fe_POL (a polymer supported Fe(III) complex) in air yields nanometric crystalline hematite ( Hem_400_air ) which efficiently catalyzes transfer hydrogenation of nitroarenes.