Exploring the dark: detecting long-lived Nile Red 3ILCT states in Ru(ii) polypyridyl photosensitisers†
Claire
Condon, 
a
Robert
Conway-Kenny,
*a
Lukas J.
Hallen,
a
Jianzhang
Zhao,
b
Graeme W.
Watson
a
and
Sylvia M.
Draper
*a
a
Robert
Conway-Kenny,
*a
Lukas J.
Hallen,
a
Jianzhang
Zhao,
b
Graeme W.
Watson
a
and
Sylvia M.
Draper
*a
Abstract
Two novel Ru(II) photosensitisers sporting ethynyl-Nile Red chromophores are shown to absorb strongly in the visible region, and to have two distinct but weakly emissive states (1ILCT* and 3MLCT*). In addition a long-lived, lower energy ‘dark’ (non-emissive) triplet excited state is identified (3ILCT*) and successfully exploited for singlet oxygen generation.
- This article is part of the themed collection: Journal of Materials Chemistry C HOT Papers
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