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Luminescent nido-carborane-diphosphines [(PR2)2C2B9H10]‑1 (R = Ph, iPr). Modification of their luminescent properties upon formation of three-coordinate gold(I) complexes

Luminescent nido-carborane-diphosphines [(PR2)2C2B9H10]‑1 (R = Ph, iPr). Modification of their luminescent properties upon formation of three-coordinate gold(I) complexes

Authors :
Crespo, O.
Gimeno, M.C.
Jones, P.G.
Laguna, A.
López-de-Luzuriaga, J.Ma.
Monge, M.
Pérez, J.L.
Ramón, M.A.
Source :
RIUR. Repositorio Institucional de la Universidad de La Rioja, instname, RIUR: Repositorio Institucional de la Universidad de La Rioja, Universidad de La Rioja (UR)
Publication Year :
2003

Abstract

The free nido-diphosphine anions [(PR2)2C2B9 H10]- R = Ph, iPr) show luminescence properties whereas the closodiphosphines [(PR2)2C2B10H10] do not. Four families of three-coordinate complexes of stoichiometry [Au- {(PR2)2C2B10H10}L]OTf (L = tertiary phosphine) and [Au{(PR2)2C2B9H10}L] have been studied in order to analyze the influence of the closo- or nido-nature of the diphosphine, the monophosphine coordinated to gold and the substituent at the diphosphine on the luminescence of the complexes. Only the nido-derivatives show luminescence. The maxima of the emissions are shifted to lower energies than those of the corresponding free nido-diphosphines. When the substituent at the diphosphine is phenyl, a new emission appears, which has been assigned as arising from a metal to ligand charge transfer [Au*(L)] excited state.

Details

Database :
OpenAIRE
Journal :
RIUR. Repositorio Institucional de la Universidad de La Rioja, instname, RIUR: Repositorio Institucional de la Universidad de La Rioja, Universidad de La Rioja (UR)
Accession number :
edsair.dedup.wf.001..3e07a75ebe2f738386062a59bee10966