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Abstract
Mononuclear and trinuclear bis-cyclometalled Ir(III)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)31.2,[{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 according to L-ligand with L1 complexes comparatively blue-shifted in solution, with longer lifetimes and higher quantum yields. The mixed bis-cyclometallated Ir(III) 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 investigation show that Ir(C^N)2 chromophores within these mixed Ir-environment species behave as isolated centres with no energy transfer or electronic communication between them.
Original language | English |
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Pages (from-to) | 8839-8849 |
Number of pages | 11 |
Journal | Chemistry - A European Journal |
Volume | 23 |
Issue number | 37 |
Early online date | 3 May 2017 |
DOIs | |
Publication status | Published - 3 Jul 2017 |
Keywords
- Cyclometallated
- Cyclotriveratrylene
- Iridium
- Luminescence
- Trinuclear complexes
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Dive into the research topics of 'Multimetallic and mixed environment iridium(III) complexes: a modular approach to luminescence tuning using a host platform'. Together they form a unique fingerprint.Projects
- 1 Finished
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Blue-Emitting Phospors: Blue-emitting Phosphors for Solid State Lighting Applications
Zysman-Colman, E. (PI)
1/06/15 → 30/09/19
Project: Standard
Datasets
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Multimetallic and mixed environment iridium(III) complexes: a modular approach to luminescence tuning using a host platform (dataset)
Pritchard, V. E. (Creator), Rota Martir, D. (Creator), Zysman-Colman, E. (Creator) & Hardie, M. J. (Creator), University of St Andrews, 24 Apr 2017
DOI: 10.17630/9faf8c70-710c-4b9b-8b62-ae0bb0c59b98
Dataset
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