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Fitzgerald SA, Otaif HY, Elgar CE, Sawicka N, Horton PN, Coles SJ, Beames JM, Pope SJA. Polysubstituted Ligand Framework for Color Tuning Phosphorescent Iridium(III) Complexes. Inorg Chem 2021; 60:15467-15484. [PMID: 34605234 DOI: 10.1021/acs.inorgchem.1c02121] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A series of ligands have been synthesized based upon a polysubstituted 2-phenylquinoxaline core structure. These ligands introduce different combinations of fluorine and methyl substituents on both the phenyl and quinoxaline constituent rings. The resultant investigation of these species as cyclometalating agents for Ir(III) gave cationic complexes of the form [Ir(C^N)2(bipy)]PF6 (where C^N = cyclometalating ligand; bipy = 2,2'-bipyridine). X-ray crystallographic studies were conducted on four complexes and each revealed the expected distorted octahedral geometry based upon a cis-C,C and trans-N,N ligand arrangement at Ir(III). Supporting computational studies predict that each of the complexes share the same general descriptions for the frontier orbitals. TD-DFT calculations suggest MLCT contributions to the lowest energy absorption and a likely MLCT/ILCT/LLCT nature to the emitting state. Experimentally, the complexes display tunable luminescence across the yellow-orange-red part of the visible spectrum (λem = 579-655 nm).
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Affiliation(s)
- Sophie A Fitzgerald
- School of Chemistry, Main Building, Cardiff University, Cardiff CF10 3AT, Cymru/Wales, United Kingdom
| | - Haleema Y Otaif
- School of Chemistry, Main Building, Cardiff University, Cardiff CF10 3AT, Cymru/Wales, United Kingdom
| | - Christopher E Elgar
- School of Chemistry, Main Building, Cardiff University, Cardiff CF10 3AT, Cymru/Wales, United Kingdom
| | - Natalia Sawicka
- School of Chemistry, Main Building, Cardiff University, Cardiff CF10 3AT, Cymru/Wales, United Kingdom
| | - Peter N Horton
- UK National Crystallographic Service, Chemistry, Faculty of Natural and Environmental Sciences, University of Southampton, Highfield, Southampton SO17 1BJ, England, United Kingdom
| | - Simon J Coles
- UK National Crystallographic Service, Chemistry, Faculty of Natural and Environmental Sciences, University of Southampton, Highfield, Southampton SO17 1BJ, England, United Kingdom
| | - Joseph M Beames
- School of Chemistry, Main Building, Cardiff University, Cardiff CF10 3AT, Cymru/Wales, United Kingdom
| | - Simon J A Pope
- School of Chemistry, Main Building, Cardiff University, Cardiff CF10 3AT, Cymru/Wales, United Kingdom
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Groves LM, Schotten C, Beames J, Platts JA, Coles SJ, Horton PN, Browne DL, Pope SJA. From Ligand to Phosphor: Rapid, Machine-Assisted Synthesis of Substituted Iridium(III) Pyrazolate Complexes with Tuneable Luminescence. Chemistry 2017; 23:9407-9418. [DOI: 10.1002/chem.201701551] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2017] [Indexed: 12/12/2022]
Affiliation(s)
- Lara M. Groves
- School of Chemistry, Main Building, Park Place; Cardiff University; Cardiff CF10 3AT UK
| | - Christiane Schotten
- School of Chemistry, Main Building, Park Place; Cardiff University; Cardiff CF10 3AT UK
| | - Joseph Beames
- School of Chemistry, Main Building, Park Place; Cardiff University; Cardiff CF10 3AT UK
| | - James A. Platts
- School of Chemistry, Main Building, Park Place; Cardiff University; Cardiff CF10 3AT UK
| | - Simon J. Coles
- UK National Crystallographic Service, Chemistry; University of Southampton, Highfield; Southampton SO17 1BJ UK
| | - Peter N. Horton
- UK National Crystallographic Service, Chemistry; University of Southampton, Highfield; Southampton SO17 1BJ UK
| | - Duncan L. Browne
- School of Chemistry, Main Building, Park Place; Cardiff University; Cardiff CF10 3AT UK
| | - Simon J. A. Pope
- School of Chemistry, Main Building, Park Place; Cardiff University; Cardiff CF10 3AT UK
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Langille G, Yang H, Zeisler S, Hoehr C, Storr T, Andreoiu C, Schaffer P. Low energy cyclotron production and cyclometalation chemistry of iridium-192. Appl Radiat Isot 2016; 115:81-86. [DOI: 10.1016/j.apradiso.2016.06.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2016] [Revised: 06/06/2016] [Accepted: 06/06/2016] [Indexed: 11/27/2022]
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Jeena V, Robinson RS. An environmentally friendly, cost effective synthesis of quinoxalines: the influence of microwave reaction conditions. Tetrahedron Lett 2014. [DOI: 10.1016/j.tetlet.2013.11.100] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Alam P, Laskar IR, Climent C, Casanova D, Alemany P, Karanam M, Choudhury AR, Raymond Butcher J. Microwave-assisted facile and expeditive syntheses of phosphorescent cyclometallated iridium(III) complexes. Polyhedron 2013. [DOI: 10.1016/j.poly.2013.01.045] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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