From ligand to phosphor: rapid, machine-assisted syntheses of substituted iridium(III)-pyrazolate complexes with tuneable luminescence
From ligand to phosphor: rapid, machine-assisted syntheses of substituted iridium(III)-pyrazolate complexes with tuneable luminescence
A first-generation machine-assisted approach towards the preparation of hybrid ligand/metal materials has been developed. A comparison of synthetic approaches demonstrates that incorporation of both flow chemistry and microwave heating can be successfully applied to the rapid synthesis of a range of new phenyl-1H-pyrazoles (ppz) substituted with electron-withdrawing groups (−F, −CF3, −OCF3, and −SF5). These, in turn, can be translated into heteroleptic complexes, [Ir(ppz)2(bipy)]BF4 (bipy=2,2′-bipyridine). Microwave-assisted synthesis for the IrIII complexes allows isolation of spectroscopically pure species in less than 1 h of reaction time starting from IrCl3. All of the new complexes have been characterised photophysically (including nanosecond time-resolved transient absorption spectroscopy), electrochemically, and by TD-DFT studies. The complexes exhibit ligand-dependent, tuneable, green-yellow luminescence (500–560 nm), with quantum yields in the range 5–15 %.
9407-9418
Groves, Lara M
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Schotten, Christiane
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Beames, Joseph
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Platts, James A.
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Coles, Simon J.
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Horton, Peter N.
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Browne, Duncan L.
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Pope, Simon J.A.
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Groves, Lara M
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Schotten, Christiane
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Beames, Joseph
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Platts, James A.
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Coles, Simon J.
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Horton, Peter N.
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Browne, Duncan L.
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Pope, Simon J.A.
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Groves, Lara M, Schotten, Christiane, Beames, Joseph, Platts, James A., Coles, Simon J., Horton, Peter N., Browne, Duncan L. and Pope, Simon J.A.
(2017)
From ligand to phosphor: rapid, machine-assisted syntheses of substituted iridium(III)-pyrazolate complexes with tuneable luminescence.
Chemistry - A European Journal, 23 (39), .
(doi:10.1002/chem.201701551).
Abstract
A first-generation machine-assisted approach towards the preparation of hybrid ligand/metal materials has been developed. A comparison of synthetic approaches demonstrates that incorporation of both flow chemistry and microwave heating can be successfully applied to the rapid synthesis of a range of new phenyl-1H-pyrazoles (ppz) substituted with electron-withdrawing groups (−F, −CF3, −OCF3, and −SF5). These, in turn, can be translated into heteroleptic complexes, [Ir(ppz)2(bipy)]BF4 (bipy=2,2′-bipyridine). Microwave-assisted synthesis for the IrIII complexes allows isolation of spectroscopically pure species in less than 1 h of reaction time starting from IrCl3. All of the new complexes have been characterised photophysically (including nanosecond time-resolved transient absorption spectroscopy), electrochemically, and by TD-DFT studies. The complexes exhibit ligand-dependent, tuneable, green-yellow luminescence (500–560 nm), with quantum yields in the range 5–15 %.
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From Ligand to Phosphor
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Accepted/In Press date: 22 May 2017
e-pub ahead of print date: 21 June 2017
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Local EPrints ID: 412786
URI: http://eprints.soton.ac.uk/id/eprint/412786
ISSN: 0947-6539
PURE UUID: 4389ca73-0701-44ba-9905-cf2a1816b431
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Date deposited: 01 Aug 2017 16:31
Last modified: 16 Mar 2024 05:34
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Contributors
Author:
Lara M Groves
Author:
Christiane Schotten
Author:
Joseph Beames
Author:
James A. Platts
Author:
Peter N. Horton
Author:
Duncan L. Browne
Author:
Simon J.A. Pope
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