Panchromatic Ru(II)-polypyridyl complexes as NIR emitters
Abstract
Two novel mer-Ru(II) heteroleptic complexes containing stongly donating tridendate ligands (dgpy and dgpz) were synthesised and optoelectronically characterised. These complexes exhibited quasi-reversible ligand- and metal-based redox events and panchromatic absorption with the lowest energy absorption maxima trailing up to 750 nm. These panchromatic dyes were found to be NIR emissive at λPL ~ 835 nm with associated excited-state lifetimes (τPL) of ~ 10 ns. The enhanced photophysical properties of these complexes compared to those of [Ru(tpy)2]2+ (tpy = 2,2′:6′,2′′-terpyridine; λabs < 575 nm, λPL ~ 629 nm and τPL ~ 0.25 ns) are due to the larger 3MLCT-3MC energy-gap as a combined effect of larger bite angle and strong σ-donation offered by the dgpy and dgpz ligands.
Citation
Pal , A K & Adusumalli , V N K B 2019 , ' Panchromatic Ru(II)-polypyridyl complexes as NIR emitters ' , New Journal of Chemistry , vol. In press . https://doi.org/10.1039/C9NJ03644J
Publication
New Journal of Chemistry
Status
Peer reviewed
ISSN
1144-0546Type
Journal article
Rights
Copyright © 2019 The Author(s). This work has been made available online in accordance with publisher policies or with permission. Permission for further reuse of this content should be sought from the publisher or the rights holder. This is the author created accepted 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/10.1039/C9NJ03644J
Description
AKP thanks the Leverhulme Trust for an early career fellowship (ECF-2017-326), ScotCHEM for a short-term Postgraduate and Early Career Researcher Exchange (PECRE) fellowship and University of St Andrews for financial support. VNKBA thanks the UGC for a fellowship.Collections
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