From Aryltin Trihydrides to Nanosized Polymers- Solvent and Residue Effects on Material Morphology

Publikation: Konferenzbeitrag(Altdaten) Vortrag oder PräsentationForschung

Abstract

Organotin dihydrides (R2SnH2) have been extensively studied as precursors in the formation of polymeric materials (polystannanes) exhibiting a linear backbone of covalently bonded tin atoms and can be seen as a molecular metal wire (Sn-Sn) embedded in an organic jacket, featuring an increased degree of electron delocalization by catenation leading to promising materials in charge-transfer devices [1]. Similarly to organotin dihydrides, organotin trihydrides (RSnH3) undergo Sn—Sn bond formation upon loss of hydrogen via a reductive dehydrogenative coupling reaction in the presence of the cheap and easy to handle amine base TMEDA (N,N,N’,N’-tetramethylethylenediamine) as polymerization catalyst forming hitherto unknown aryl decorated tin nanoparticles (aryl@Sn) (Figure 1a) [2][3][4]. The nature of the aryl residue as well as the donor capacity of the reaction solvent can affect the morphology and common correlation length of the nano-Sn/C composite material. Therefore, a range of aryl substituted tin trihydrides (arylSnH3) including o-tolylSnH3, 1-naphthyl, p-nbutylphenylSnH3 was successfully converted to novel aryl decorated tin nanoparticles (aryl@Sn) (Figure 1a) [3][4]. SAXS measurements on the isolated material revealed that the nature of the aryl substituent alters the size of the formed nanoparticles.
Furthermore, in situ synchrotron SAXS measurements of the reductive dehydrogenative coupling reaction of o-tolylSnH3 in a variety of solvents including diethyl ether, toluene, DME and cyclohexane were employed. These investigations reveal the effect of the nature of the applied solvent on the nano morphology evolution over reaction time (Figure 1b). These results successfully provide a “chemical file” allowing for a fine tuning of the material’s characteristic on a nanometer scale.
Originalspracheenglisch
PublikationsstatusVeröffentlicht - 11 Okt 2016
Veranstaltung“SAXS on Nanosystems: current trends and perspectives“ 20 years of the Austrian SAXS Beamline at Elettra - ST - Trieste, Trieste, Italien
Dauer: 10 Okt 201612 Okt 2016

Konferenz

Konferenz“SAXS on Nanosystems: current trends and perspectives“ 20 years of the Austrian SAXS Beamline at Elettra - ST
LandItalien
OrtTrieste
Zeitraum10/10/1612/10/16

ASJC Scopus subject areas

  • !!Chemistry(all)

Fields of Expertise

  • Advanced Materials Science

Kooperationen

  • NAWI Graz

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  • Dieses zitieren

    Torvisco Gomez, A., Zeppek, C., Amenitsch, H., Flock, M., Guglieri, C., & Uhlig, F. (2016). From Aryltin Trihydrides to Nanosized Polymers- Solvent and Residue Effects on Material Morphology. “SAXS on Nanosystems: current trends and perspectives“ 20 years of the Austrian SAXS Beamline at Elettra - ST, Trieste, Italien.