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

Research output: Contribution to conference(Old data) Lecture or Presentation

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.
Original languageEnglish
Publication statusPublished - 11 Oct 2016
Event“SAXS on Nanosystems: current trends and perspectives“ 20 years of the Austrian SAXS Beamline at Elettra - ST - Trieste, Trieste, Italy
Duration: 10 Oct 201612 Oct 2016

Conference

Conference“SAXS on Nanosystems: current trends and perspectives“ 20 years of the Austrian SAXS Beamline at Elettra - ST
CountryItaly
CityTrieste
Period10/10/1612/10/16

ASJC Scopus subject areas

  • Chemistry(all)

Fields of Expertise

  • Advanced Materials Science

Cooperations

  • NAWI Graz

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