Highly phosphorescent cyclometalated iridium(III) complexes for optoelectronic applications: fine tuning of the emission wavelength through ancillary ligands

Łukasz Skórka , Michał Filapek , Lidia Żur , Jan Grzegorz Małecki , Wojciech Pisarski , Marian Olejnik , Witold Danikiewicz , Stanisław Krompiec

Abstract

A series of novel, highly phosphorescent cyclometalated iridium(III) complexes of type [(X2C^N)2Ir(Q2bpy)]+PF6–(where X2C^N is 2-phenylpyridine or 2-(2,4-difluorophenyl)pyridine anion and Q2bpy are 4,4′-bifunctionalized 2,2′-bipyridines) is presented. The complexes were fully characterized by means of NMR spectroscopy, high-resolution mass spectrometry (HRMS), cyclic voltammetry, and UV–vis. For several compounds also the crystallographic structures were obtained. The cyclometalates exhibited efficient photoluminescence at 298 K both in solution and in the solid state with good intensity and color purity. The emission wavelength range covered almost the whole visible spectrum and was strongly correlated with the EWG/ERG character of the Q substituent in the ancillary ligand. For further insight into the electronic structure of the complexes, a comprehensive electrochemical support (CV) was introduced, and finally, it was confronted with theoretical background using a density functional theory approach together with time-dependent calculations of the excited states. Copyright © 2016 American Chemical Society
Author Łukasz Skórka KChTP
Łukasz Skórka,,
- Chair Of Polymer Chemistry And Technology
, Michał Filapek - [University of Silesia (UŚ)]
Michał Filapek,,
-
- Uniwersytet Śląski
, Lidia Żur - [University of Silesia (UŚ)]
Lidia Żur,,
-
- Uniwersytet Śląski
, Jan Grzegorz Małecki - [University of Silesia (UŚ)]
Jan Grzegorz Małecki,,
-
- Uniwersytet Śląski
, Wojciech Pisarski - [University of Silesia (UŚ)]
Wojciech Pisarski,,
-
- Uniwersytet Śląski
, Marian Olejnik - [Instytut Chemii Organicznej PAN]
Marian Olejnik,,
-
- Instytut Chemii Organicznej PAN
, Witold Danikiewicz - [Instytut Chemii Organicznej PAN]
Witold Danikiewicz,,
-
- Instytut Chemii Organicznej PAN
, Stanisław Krompiec - [University of Silesia (UŚ)]
Stanisław Krompiec,,
-
- Uniwersytet Śląski
Journal seriesThe Journal of Physical Chemistry Part C: Nanomaterials, Interfaces and Hard Matter, ISSN 1932-7447
Issue year2016
Vol120
No13
Pages7284-7294
Publication size in sheets0.5
DOIDOI:10.1021/acs.jpcc.6b01663
URL http://pubs.acs.org/doi/abs/10.1021/acs.jpcc.6b01663
Languageen angielski
File
acs%2Ejpcc%2E6b01663.pdf 3.6 MB
Score (nominal)35
ScoreMinisterial score [Punktacja MNiSW] = 35.0, 28-11-2017, ArticleFromJournal
Ministerial score (2013-2016) [Punktacja MNiSW (2013-2016)] = 35.0, 28-11-2017, ArticleFromJournal
Publication indicators WoS Impact Factor [Impact Factor WoS]: 2016 = 4.536 (2) - 2016=4.796 (5)
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