Influence of Perfluorinated End Groups on the SFRD of [Pt(cod)Me(CnF2n+1)] onto Porous Al2O3 in CO2 under Reductive Conditions1. Issue 38 (5th August 2013)

• Record Type: Journal Article
• Authors: Aggarwal, Vikas; Reichenbach, Linus F.; Enders, Mirja; Muller, Thierry; Wolff, Simone; Crone, Marlene; Türk, Michael; Bräse, Stefan
• Is Part Of: Chemistry. Volume 19:Issue 38(2013)
• Page Start: 12794
• Page End: 12799
• Publication Date: 2013-08-05
• Subjects: Chemistry -- Periodicals; 540
• DOI: 10.1002/chem.201301191
• Languages: English
• ISSNs: 0947-6539

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>The optimized synthesis of a range of cyclooctadiene‐stabilized Pt complexes that contained different perfluoro‐alkane chains, [Pt(cod)Me(C<sub><italic>n</italic></sub>F<sub>2<italic>n</italic>+1</sub>)], is presented. These metal–organic compounds were employed in the so‐called supercritical fluid reactive deposition (SFRD) in CO<sub>2</sub> under reductive conditions to generate metallic nanoparticles on aluminum oxide as a porous support. Thus, Al<sub>2</sub>O<sub>3</sub>‐supported Pt nanoparticles with a narrow particle‐size distribution were obtained. At a reduction pressure of 15.5 MPa and a temperature of 353 K, particle diameters of <italic>d</italic><sub>50</sub>=2.3–2.8 nm were generated. Decreasing the pressure during the reduction reaction led to slightly larger particles whilst decreasing the amount of organometallic precursor in CO<sub>2</sub> yielded a decrease in the particle size from <italic>x</italic><sub>50</sub>=3.2 nm to 2.6 nm and a particle‐size distribution of 2.2 nm. Furthermore, substitution of the CH<sub>3</sub> end group by the C<sub><italic>n</italic></sub>F<sub>2<italic>n</italic>+1</sub> end groups led to a significant drop in Pt loading of about 50 %. Within the series of perfluorinated end groups that were considered, the Pt complex that contained a branched perfluoro‐isopropyl group showed the most‐interesting results when compared to the control precursor, [Pt(cod)Me<sub>2</sub>] (<bold>1</bold>).</p> </abstract>