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Highly-phosphorescent tungsten(0) carbonyl pyridyl-imidazole complexes as photosensitisers

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Abstract

Photoluminescence data are reported for two W(CO)4L complexes (L = 2-(1H-imidazol-2-yl)pyridine and 2-(2′-pyridyl)benzimidazole) in room-temperature solutions. The bidentate ligands consist of a pyridine and an imidazole moiety connected by a C–C bond. The complexes have been found to exhibit enhanced phosphorescence from the metal-to-ligand charge transfer (MLCT) excited state with quantum yields in the order of 10−3, almost two orders of magnitude higher than those reported for W(CO)4(diimine) complexes. One of the complexes W(CO)4(2-(2′-pyridyl)benzimidazole) can serve as an efficient visible-light photosensitiser for the isomerisation of aromatic alkenes with efficiency comparable to and even exceeding that of the well-studied ruthenium tris-bipyridine complex, Ru(bpy)Cl2.

Graphical abstract: Highly-phosphorescent tungsten(0) carbonyl pyridyl-imidazole complexes as photosensitisers

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Publication details

The article was received on 03 Jul 2017, accepted on 31 Jul 2017 and first published on 31 Jul 2017


Article type: Paper
DOI: 10.1039/C7DT02397A
Citation: Dalton Trans., 2017, Advance Article
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    Highly-phosphorescent tungsten(0) carbonyl pyridyl-imidazole complexes as photosensitisers

    J. J. Lee, C. P. Yap, T. S. Chwee and W. Y. Fan, Dalton Trans., 2017, Advance Article , DOI: 10.1039/C7DT02397A

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