Lookup NU author(s): Stuart Thompson,
Dr Thomas Penfold
This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).
This article describes a convenient method for the synthesis of ONNO-type tetradentate 6,6′-bis(2-phenoxy)-2,2′-bipyridine (bipyridine bisphenolate, BpyBph) ligands and their platinum(II) complexes. The methodology includes the synthesis of 1,2,4-triazine precursors followed by their transformation to functionalized pyridines by the Boger reaction. Two complementary routes employing 3,3′- and 5,5′-bis-triazines allow a modification of the central pyridine rings in different positions, which was exemplified by the introduction of cyclopentene rings. The new ligands were used to prepare highly luminescent ONNO-type Pt(II) complexes. The position of the cyclopentene rings significantly influences the solubility and photophysical properties of these complexes. Derivatives with closely positioned cyclopentene rings are soluble in organic solvents and proved to be the best candidate for solution-processable organic light-emitting devices (OLEDs), showing efficient single-dopant candlelight electroluminescence.
Author(s): Pander P, Bulmer R, Martinscroft R, Thompson S, Lewis FW, Penfold TJ, Dias FB, Kozhevnikov VN
Publication type: Article
Publication status: Published
Journal: Inorganic Chemistry
Pages: epub ahead of print
Print publication date: 14/03/2018
Online publication date: 14/03/2018
Acceptance date: 01/03/2018
ISSN (print): 0020-1669
ISSN (electronic): 1520-510X
Publisher: American Chemical Society
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