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Heteroleptic [Cu(P^P)(N^N)][PF6] compounds with isomeric dibromo-1,10-phenanthroline ligands

Nohara, Isaak and Keller, Aramis and Tarassenko, Nikolai and Prescimone, Alessandro and Constable, Edwin C. and Housecroft, Catherine E.. (2020) Heteroleptic [Cu(P^P)(N^N)][PF6] compounds with isomeric dibromo-1,10-phenanthroline ligands. Inorganics, 8. p. 4.

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Abstract

A series of [Cu(P^P)(N^N)][PF6] compounds are reported in which N^N is 2,9-dibromo-1,10-phenanthroline (2,9-Br2phen), 3,8-dibromo-1,10-phenanthroline (3,8-Br2phen) or 4,7-dibromo-1,10-phenanthroline (4,7-Br2phen) and P^P is bis(2-(diphenylphosphano)phenyl)ether(POP) or 4,5-bis(diphenylphosphano)-9,9-dimethylxanthene(xantphos). The compounds have been characterized by solution multinuclear NMR spectroscopy, mass spectrometry and single-crystal X-ray analysis. Each compound undergoes a partially-reversible or irreversible copper-centred oxidation, the highest potential being for 2,9-Br2phen-containing compounds. In solution, the compounds are weak yellow or orange emitters, whereas powdered samples exhibit yellow emissions with photoluminescence quantum yields of up to 45% for [Cu(xantphos)(2,9-Br2phen)][PF6] with an excited state lifetime τ1/2= 9.9 μs. Values of λemmaxfor [Cu(POP)(2,9-Br2phen)][PF6] and [Cu(xantphos)(2,9-Br2phen)][PF6] are blue-shifted with respect to compounds with the 3,8- and 4,7-isomers, both in solution and the solid state
Faculties and Departments:05 Faculty of Science > Departement Chemie > Chemie > Anorganische Chemie (Constable)
05 Faculty of Science > Departement Chemie > Chemie > Anorganische Chemie (Housecroft)
UniBasel Contributors:Housecroft, Catherine Elizabeth and Constable, Edwin Charles and Nohara, Isaak and Keller, Aramis and Tarassenko, Nikolai and Prescimone, Alessandro
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:MDPI
e-ISSN:2304-6740
Note:Publication type according to Uni Basel Research Database: Journal article
Language:English
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Last Modified:21 Jan 2020 10:21
Deposited On:21 Jan 2020 10:21

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