Pritchard, VE, Martir, DR, Zysman-Colman, E et al. (1 more author) (2017) Multimetallic and mixed environment iridium(III) complexes: A modular approach to luminescence tuning using a host platform. Chemistry - A European Journal, 23 (37). pp. 8839-8849. ISSN 0947-6539
Abstract
Mononuclear and trinuclear bis-cyclometallated IrIII complexes of the host ligands tris(4-[4′-methyl-2,2′-bipyridyl]methyl)cyclotriguaiacylene (L1) and tris(4-(4′-methyl-2,2′- bipyridyl)carboxy)cyclotriguaiacylene (L2) have been prepared. Complexes [{Ir(ppy)2}3(L1)](PF6)3 (1.1), [{Ir(ppy)2}(L1)](PF6)3 (1.2), [{Ir(ppy)2}3(L2)](PF6)3 (2.1) and [{Ir(ppy)2}(L2)](PF6)3 (2.2) (where ppy=phenylpyridinato) showed distinct photophysical properties depending on the L ligand. Complexes featuring the L1 ligand were comparatively blue-shifted in solution, with longer lifetimes and higher quantum yields. The mixed bis-cyclometallated IrIII complexes [{Ir(ppy)2}{Ir(dFppy)2}2(L1)](PF6)3 (1.3), [{Ir(ppy)2}{Ir(dFppy)2}2(L2)](PF6)3 (2.3), [{Ir(ppy)2}2{Ir(dFppy)2}(L1)](PF6)3 (1.4) and [{Ir(ppy)2}2{Ir(dFppy)2}(L2)](PF6)3 (2.4) (where dFppy=2,4-difluorophenylpyrinato) were also synthesised. Steady-state and time-resolved spectroscopy, along with electrochemical investigations, show that the Ir(III) chromophores within these mixed Ir-environment species behave as isolated centres, with no energy transfer or electronic communication between them.
Metadata
Item Type: | Article |
---|---|
Authors/Creators: |
|
Copyright, Publisher and Additional Information: | © 2017 The Authors. Published by Wiley-VCH Verlag GmbH & Co. KGaA. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. |
Dates: |
|
Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Chemistry (Leeds) > Inorganic Chemistry (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 29 Mar 2017 09:55 |
Last Modified: | 01 Aug 2017 13:48 |
Status: | Published |
Publisher: | Wiley |
Identification Number: | 10.1002/chem.201700237 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:114222 |