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CCC-pincer-NHC osmium complexes: New types of blue-green emissive neutral compounds for organic light-emitting devices

AuthorsAlabau, Roberto G. ; Eguillor, Beatriz ; Esteruelas, Miguel A. ; Oliván, Montserrat ; Oñate, Enrique ; Tsai, Jui-Yi; Xia, Chuanjun
Issue Date17-Sep-2014
CitationXXXII GEQO (2014)
Abstract[Work hypothesis and objective]: An important class of N-heterocyclic carbene ligands is that introducing a donor atom between two carbene edges. This type of ligands provide pincer coordination, and although a diverse array of pincer ligands bearing the NHC motif have been employed, those based on an NHC-aryl-NHC framework are attracting special interest, since the transition metal complexes bearing these ligands, mainly iridium and platinum, have interesting photophysical properties. The objective of this research has been the synthesis and characterization of Osmium derivatives with pincer ligands of the type NHC-aryl-NHC, and the study of their photophysical properties. [Results]: We show here the results of the reactivity of the complex OsH6(PiPr3)2 towards CbenzimidazoliumCarylCbenzimidazolium and CimidazoliumCarylCimidazolium salts. Neutral Os(CCC)-pincer derivatives, including Os(IV)- and Os(II)-hydride species and homoleptic and heteroleptic bis(tridentate) Os(II) complexes have been prepared. Some of them have interesting photophysical properties, and moderate to high photoluminescence quantum yields are observed in the solid state.
DescriptionTrabajo presentado a la XXXII Conference Expert Group Meeting on Organometallic Chemistry celebrada en Tarragona (España) del 17 al 19 de septiembre de 2014.
Appears in Collections:(ISQCH) Comunicaciones congresos
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