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From ligand to phosphor: rapid, machine-assisted syntheses of substituted iridium(III)-pyrazolate complexes with tuneable luminescence

Pope, Simon J., Groves, Lara, Schotten, Christiane, Beames, Joseph, Platts, James, Browne, Duncan, Coles, Simon and Horton, Peter 2017. From ligand to phosphor: rapid, machine-assisted syntheses 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 %.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Advanced Research Computing @ Cardiff (ARCCA)
Chemistry
Subjects: Q Science > QD Chemistry
Uncontrolled Keywords: multistep continuous flow; phosphorescent materials
Publisher: WileyBlackwell
ISSN: 0947-6539
Date of First Compliant Deposit: 6 June 2017
Date of Acceptance: 19 May 2017
Last Modified: 25 Nov 2019 00:44
URI: http://orca-mwe.cf.ac.uk/id/eprint/100872

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