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
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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