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Homochiral self-sorted and emissive IrIII metallo-cryptophanes

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Date
05/05/2017
Author
Pritchard, Victoria E.
Rota Martir, Diego
Oldknow, Samuel
Kai, Shumpei
Hiraoka, Shuichi
Cookson, Nikki J.
Zysman-Colman, Eli
Hardie, Michaele J.
Funder
EPSRC
Grant ID
EP/M02105X/1
Keywords
Supramolecular chemistry
Cage compounds
Homochiral self-sorting
Phosphorescence
Iridium
QD Chemistry
DAS
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Abstract
The racemic ligands (±)-tris(isonicotinoyl)-cyclotriguaiacylene (L1), or (±)-tris(4-pyridyl-methyl)-cyclotriguaiacylene (L2) assemblewith racemic (Λ, Δ)- [Ir(ppy)2(MeCN)2]+, in which ppy = 2-phenylpyridinato to form [{Ir(ppy)2}3(L)2]3+ metallo-cryptophane cages. The crystal structure of [{Ir(ppy)2}3(L1)2]∙3BF4 has MM-ΛΛΛ nd PP-ΔΔΔ isomers, and homochiral self-sorting occurs in solution, a processaccelerated by a chiral guest. Self-recognition between L1 and L2 within cagesdoes not occur, and cages show very slow ligand-exchange. Both cages are phosphorescent,with [{Ir(ppy)2}3(L2)2]3+ havingenhanced and blue-shifted emission when compared with [{Ir(ppy)2}3(L1)2]3+ .
Citation
Pritchard , V E , Rota Martir , D , Oldknow , S , Kai , S , Hiraoka , S , Cookson , N J , Zysman-Colman , E & Hardie , M J 2017 , ' Homochiral self-sorted and emissive Ir III metallo-cryptophanes ' , Chemistry - A European Journal , vol. 23 , no. 26 , pp. 6290-6294 . https://doi.org/10.1002/chem.201701348
Publication
Chemistry - A European Journal
Status
Peer reviewed
DOI
https://doi.org/10.1002/chem.201701348
ISSN
0947-6539
Type
Journal article
Rights
© 2017 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim. This work has been made available online in accordance with the publisher’s policies. This is the author created, accepted version manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at: https://doi.org/10.1002/chem.201701348
Description
We thank the EPSRC (DTG award 1238852, EP/K039202/1, EP/M02105X/1, EP/J001325/1), Leverhulme Trust (RPG-2014-148), University of St Andrews, and the MEXT/JSPS Grants in Aid for Scientific Research (JP25102005 and JP25102001) for funding; Simon Barrett for assistance with NMR; Martin Huscroft for assistance with HPLC, and Stephen Boyer for elemental analysis measurements.
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  • University of St Andrews Research
URI
http://hdl.handle.net/10023/13176

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