| Synthesis and properties of phosphorescent iridium(iii) complexes of delocalized ligands. | |
| | |
MedLine Citation:
|
PMID: 23348844 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
|
New Ir(iii) complexes involving N,C-chelating difluorophenyl-pyridine (dfppy) or dibenzo[a,c]phenazine (dbpz) ligands along with either N,N-bound 5-ethynyl-2,2'-bipyridine (e-bpy) or CO + Cl co-ligands have been obtained as [Ir(dfppy)(2)(e-bpy)]PF(6), [Ir(dbpz)(2)(e-bpy)]PF(6) and cis-[Ir(dbpz)(2)(Cl)(CO)]. A single-crystal X-ray diffraction study of cis-[Ir(dbpz)(2)(CO)Cl] has shown the Ir(iii) centre to adopt a distorted octahedral coordination geometry with cis-CO/Cl and trans-N,N configurations. Pronounced π-π stacking interactions involving different dibenzo[a,c]phenazine units are evident. Electronic absorption and luminescence spectroscopy at 298 K and 77 K, along with cyclic voltammetry were used to study the three complexes. Excited state lifetimes varied from 1.4 to 2.9 μs at rt with quantum yields ranging from 10.2 to 0.7%. With 5-ethynyl-2,2'-bipyridine in the first coordination sphere, the lowest emitting state is that associated with the MLCT band, whereas in the bis-phenazine case the emission is ligand-centred. Importantly, the emission wavelength can be tuned from 552 to 640 nm by changing the conjugation length of the N,C ligand. |
| | |
Authors:
|
Thomas Bura; Pascal Retailleau; Maria Teresa Indelli; Raymond Ziessel |
Related Documents
:
|
19754204 - Asymmetries in transition metal xps spectra: metal nanoparticle structure, and interact... 20867114 - Superelongation and atomic chain formation in nanosized metallic glass. 23305534 - Photophysical and electrochemical investigations of the fluorescent probe, 4,4'-bis(2-b... 19082024 - Metal-free organic dye sensitized solar cell based on perpendicular zinc oxide nanoshee... 8142354 - Resonance raman spectroscopic evidence for the fes4 and fe-o-fe sites in rubrerythrin f... 21522354 - N-(2-chloro-phenyl-sulfon-yl)-2-methyl-propanamide. |
Publication Detail:
|
Type: JOURNAL ARTICLE Date: 2013-1-25 |
Journal Detail:
|
Title: Dalton transactions (Cambridge, England : 2003) Volume: - ISSN: 1477-9234 ISO Abbreviation: Dalton Trans Publication Date: 2013 Jan |
Date Detail:
|
Created Date: 2013-1-25 Completed Date: - Revised Date: - |
Medline Journal Info:
|
Nlm Unique ID: 101176026 Medline TA: Dalton Trans Country: - |
Other Details:
|
Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
|
Laboratoire de Chimie Organique et Spectroscopies Avancées (LCOSA), UMR 7515 au CNRS, Ecole Européenne de Chimie, Polymères et Matériaux, Université de Strasbourg, 25 rue Becquerel, 67087 Strasbourg Cedex 02, France. ziessel@unistra.fr. |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
|
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Airway Vascular Endothelial Function in Healthy Smokers without Systemic Endothelial Dysfunction.
Next Document: Factors Affecting Open-Set Word Recognition in Adults With Cochlear Implants.