From Aryltin Trihydrides to Nanosized Polymers- Mechanistic Insights and Material Characterization

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. Linear polystannanes 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 (R2SnH2), organotin trihydrides (RSnH3) undergo Sn-Sn bond formation upon loss of hydrogen via a dehydrogenative coupling reaction in the presence of the cheap and easy to handle amine base TMEDA (N,N,N’,N’- tetramethylethylenediamine) as polymerization catalyst.2 Therefore, a range of aryl substituted tin trihydrides (arylSnH3) was successfully converted to novel aryl decorated tin nanoparticles (aryl@Sn) (Figure 1).3,4 By means of DFT calculations, EXAFS/XANES and NMR measurements a reductive dehydrocoupling mechanism is proposed allowing for H2 abstraction Sn-Sn bond formation.
In situ synchrotron SAXS measurements, HR-SEM, as well as TEM imaging were applied to elucidate the resulting morphology as well as the size of the nano-Sn/C composites formed.
Originalspracheenglisch
PublikationsstatusVeröffentlicht - 13 Feb 2016
VeranstaltungZing Inorganic Polymers Conference 2016 - California, Carlsbad, USA / Vereinigte Staaten
Dauer: 12 Mär 201615 Mär 2016

Konferenz

KonferenzZing Inorganic Polymers Conference 2016
LandUSA / Vereinigte Staaten
OrtCarlsbad
Zeitraum12/03/1615/03/16

ASJC Scopus subject areas

  • !!Chemistry(all)

Fields of Expertise

  • Advanced Materials Science

Kooperationen

  • NAWI Graz

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