Groves, LM;
Schotten, C;
Beames, J;
Platts, JA;
Coles, SJ;
Horton, PN;
Browne, DL;
(2017)
From Ligand to Phosphor: Rapid, Machine-Assisted Synthesis of Substituted Iridium(III) Pyrazolate Complexes with Tuneable Luminescence.
Chemistry - A European Journal
, 23
(39)
pp. 9407-9418.
10.1002/chem.201701551.
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Abstract
A first generation machine-assisted approach towards the preparation of hybrid ligand/metal materials has been explored. 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, -SF5), and these, in turn, can be translated in to heteroleptic complexes, [Ir(ppz)2(bipy)]BF4 (bipy = 2,2’-bipyridine). Microwave-assisted syntheses for the IrIII complexes allows isolation of spectroscopically pure species in less than 1 hour of reaction time from IrCl3. All new complexes have been explored photophysically (including nanosecond time-resolved transient absorption spectroscopy), electrochemically and by TD-DFT studies which show that the complexes possess ligand-dependent, and thus, tuneable green-yellow luminescence (500-560 nm), with quantum yields in the range 5-15 %.
| Type: | Article |
|---|---|
| Title: | From Ligand to Phosphor: Rapid, Machine-Assisted Synthesis of Substituted Iridium(III) Pyrazolate Complexes with Tuneable Luminescence |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1002/chem.201701551 |
| Publisher version: | http://dx.doi.org/10.1002/chem.201701551 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | iridium complexes, ligand syntheses, multistep continuous flow reactions, phosphorescent materials, FRONTAL AFFINITY-CHROMATOGRAPHY, OPTIMIZING REACTOR SYSTEMS, CONTINUOUS-FLOW PROCESS, LIGHT-EMITTING DEVICES, SELF-OPTIMIZATION, INTEGRATED SYNTHESIS, MASS-SPECTROMETRY, III COMPLEXES, BASIS-SET, CHEMISTRY |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Life Sciences UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Life Sciences > UCL School of Pharmacy UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Life Sciences > UCL School of Pharmacy > Pharma and Bio Chemistry |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10114351 |
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