Synthesis, structure, and optical properties of new cadmium chalcogenide clusters of the type [Cd10E4(E'Ph)12(PR3) 4], (E, E' = Te, Se, S)

Andreas Eichhöfer*, Assaf Aharoni, Uri Banin

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

37 Scopus citations

Abstract

New cadmium chalcogenide cluster molecules [Cd10E4(E'Ph)12(PnPr 3)4], E = Te, E' = Te (1) and [Cd10E4(E'Ph)12-(PnPr 2Ph)4] E = Te, E' = Se (2); E = Te E' = S (3); E = Se, E' = S (4) have been synthesized and structurally characterized by single crystal X-ray structure analysis. The influence of the variation of the chalcogen atom is investigated by structural means and by optical spectroscopy. All cluster-molecules have a broad emission in the blue-visible range at low temperature as indicated by photoluminescence (PL) measurements. A clear classification of the emission peak position can be made based on the E' species suggesting that the emission is assigned to transitions associated with the cluster surface ligands. Photoluminescence excitation and absorption measurements display a systematic shift of the band gap to the higher energies with the variation of E and E' from Te to Se to S, as also occurs in the respective series of the bulk semiconductors.

Original languageAmerican English
Pages (from-to)2415-2421
Number of pages7
JournalZeitschrift fur Anorganische und Allgemeine Chemie
Volume628
Issue number11
DOIs
StatePublished - 2002

Keywords

  • Cadmium chalcogenide
  • Cluster compounds
  • Crystal structure
  • UV-VIS spectroscopy

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