Oxidative Addition to Sn(II) Guanidinate Complexes: Precursors to Tin(II) Chalcogenide Nanocrystals

Andrew Johnson, Ibbi Ahmet, Joseph Thompson

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3 Citations (Scopus)
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Abstract

SnS, SnSe and SnTe are potentially important semiconductor materials. Here, we describe the application of chalcogen containing Sn IV guanidinate precursors for the production of tin(II) chalcogenide nanocrystals. Reaction of the stannylene(II) guanidinate complex [{Me 2NC(NCy) 2} 2Sn] (1) with Ph 2E 2 (E = S, Se, Te), and CBr 4 forms the Sn IV complexes [{Me 2NC(NCy) 2} 2Sn(Ch-Ph) 2] (2–4) and [{Me 2NC(NCy) 2} 2SnBr 2] (5), respectively. Complex 5 has been subsequently used for the synthesis of the corresponding Sn IV mono chalcogenide complexes, [{Me 2NC(NCy) 2} 2Sn = E] (6–8) by the reaction of 5 with Li 2E systems. Isolated tin complexes have characterized by elemental analysis, NMR spectroscopy, and the molecular structures of complexes 2–5 determined by single-crystal X-ray diffraction. TG analysis showed that complexes 2–4 and 6–8 all have residual masses close to those expected for the formation of the corresponding “SnE” systems. Complexes 6–8 were assessed for their utility in the formation of nanocrystalline materials. The materials obtained were characterized by powder X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM) and energy dispersive X-ray analysis (EDX). Analysis showed formation of SnSe and SnTe from complexes 7 and 8, respectively.

Original languageEnglish
Pages (from-to)1670-1678
Number of pages9
JournalEuropean Journal of Inorganic Chemistry
Volume2018
Issue number15
Early online date28 Feb 2018
DOIs
Publication statusPublished - 23 Apr 2018

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Tin
Nanocrystals
Nanocrystalline materials
Energy dispersive X ray analysis
Field emission
X ray powder diffraction
Molecular structure
Nuclear magnetic resonance spectroscopy
Single crystals
Semiconductor materials
X ray diffraction
Crystals
Scanning electron microscopy
Chemical analysis

Keywords

  • Guanidinate
  • Precursors
  • Selenium
  • Sulfur
  • Tellurium
  • Tin(II)

ASJC Scopus subject areas

  • Inorganic Chemistry

Cite this

Oxidative Addition to Sn(II) Guanidinate Complexes: Precursors to Tin(II) Chalcogenide Nanocrystals. / Johnson, Andrew; Ahmet, Ibbi; Thompson, Joseph.

In: European Journal of Inorganic Chemistry, Vol. 2018, No. 15, 23.04.2018, p. 1670-1678.

Research output: Contribution to journalArticle

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N2 - SnS, SnSe and SnTe are potentially important semiconductor materials. Here, we describe the application of chalcogen containing Sn IV guanidinate precursors for the production of tin(II) chalcogenide nanocrystals. Reaction of the stannylene(II) guanidinate complex [{Me 2NC(NCy) 2} 2Sn] (1) with Ph 2E 2 (E = S, Se, Te), and CBr 4 forms the Sn IV complexes [{Me 2NC(NCy) 2} 2Sn(Ch-Ph) 2] (2–4) and [{Me 2NC(NCy) 2} 2SnBr 2] (5), respectively. Complex 5 has been subsequently used for the synthesis of the corresponding Sn IV mono chalcogenide complexes, [{Me 2NC(NCy) 2} 2Sn = E] (6–8) by the reaction of 5 with Li 2E systems. Isolated tin complexes have characterized by elemental analysis, NMR spectroscopy, and the molecular structures of complexes 2–5 determined by single-crystal X-ray diffraction. TG analysis showed that complexes 2–4 and 6–8 all have residual masses close to those expected for the formation of the corresponding “SnE” systems. Complexes 6–8 were assessed for their utility in the formation of nanocrystalline materials. The materials obtained were characterized by powder X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM) and energy dispersive X-ray analysis (EDX). Analysis showed formation of SnSe and SnTe from complexes 7 and 8, respectively.

AB - SnS, SnSe and SnTe are potentially important semiconductor materials. Here, we describe the application of chalcogen containing Sn IV guanidinate precursors for the production of tin(II) chalcogenide nanocrystals. Reaction of the stannylene(II) guanidinate complex [{Me 2NC(NCy) 2} 2Sn] (1) with Ph 2E 2 (E = S, Se, Te), and CBr 4 forms the Sn IV complexes [{Me 2NC(NCy) 2} 2Sn(Ch-Ph) 2] (2–4) and [{Me 2NC(NCy) 2} 2SnBr 2] (5), respectively. Complex 5 has been subsequently used for the synthesis of the corresponding Sn IV mono chalcogenide complexes, [{Me 2NC(NCy) 2} 2Sn = E] (6–8) by the reaction of 5 with Li 2E systems. Isolated tin complexes have characterized by elemental analysis, NMR spectroscopy, and the molecular structures of complexes 2–5 determined by single-crystal X-ray diffraction. TG analysis showed that complexes 2–4 and 6–8 all have residual masses close to those expected for the formation of the corresponding “SnE” systems. Complexes 6–8 were assessed for their utility in the formation of nanocrystalline materials. The materials obtained were characterized by powder X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM) and energy dispersive X-ray analysis (EDX). Analysis showed formation of SnSe and SnTe from complexes 7 and 8, respectively.

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