Panchromatic Ru(II)-polypyridyl complexes as NIR emitters

Amlan K. Pal; Venkata Nanda Kishor Babu  Adusumalli

doi:10.1039/C9NJ03644J

Panchromatic Ru(II)-polypyridyl complexes as NIR emitters

Amlan K. Pal, Venkata Nanda Kishor Babu Adusumalli

School of Chemistry

Research output: Contribution to journal › Article › peer-review

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 λ_PL ~ 835 nm with associated excited-state lifetimes (τ_PL) of ~ 10 ns. The enhanced photophysical properties of these complexes compared to those of [Ru(tpy)₂]²⁺ (tpy = 2,2′:6′,2′′-terpyridine; λ_abs < 575 nm, λ_PL ~ 629 nm and τ_PL ~ 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.

Original language	English
Number of pages	4
Journal	New Journal of Chemistry
Volume	In press
Early online date	3 Sept 2019
DOIs	https://doi.org/10.1039/C9NJ03644J
Publication status	E-pub ahead of print - 3 Sept 2019

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Pal_2019_NJC_Ru(II)_AAM
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
Accepted author manuscript, 1.19 MB

Photochemical Self-assembly: Photochemical Self-assembly of Light Harvesting Chromophores to Form Discrete Supramolecules
Pal, A. K. (PI)
The Leverhulme Trust
1/09/17 → 23/12/19
Project: Fellowship

Panchromatic Ru(II)-polypyridyl complexes as NIR emitters (dataset)
Pal, A. K. (Creator) & Adusumalli , V. N. K. B. (Creator), Cambridge Crystallographic Data Centre, 2019
https://dx.doi.org/10.5517/ccdc.csd.cc1zwl7p
Dataset

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@article{27378438093f4dcdbb1b11ed6d3ca481,

title = "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.",

author = "Pal, {Amlan K.} and Adusumalli, {Venkata Nanda Kishor Babu}",

note = "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.",

year = "2019",

month = sep,

day = "3",

doi = "10.1039/C9NJ03644J",

language = "English",

volume = "In press",

journal = "New Journal of Chemistry",

issn = "1144-0546",

publisher = "ROYAL SOC CHEMISTRY",

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TY - JOUR

T1 - Panchromatic Ru(II)-polypyridyl complexes as NIR emitters

AU - Pal, Amlan K.

AU - Adusumalli, Venkata Nanda Kishor Babu

N1 - 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.

PY - 2019/9/3

Y1 - 2019/9/3

N2 - 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.

AB - 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.

U2 - 10.1039/C9NJ03644J

DO - 10.1039/C9NJ03644J

M3 - Article

SN - 1144-0546

VL - In press

JO - New Journal of Chemistry

JF - New Journal of Chemistry

ER -

Panchromatic Ru(II)-polypyridyl complexes as NIR emitters

Abstract

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Projects

Photochemical Self-assembly: Photochemical Self-assembly of Light Harvesting Chromophores to Form Discrete Supramolecules

Datasets

Panchromatic Ru(II)-polypyridyl complexes as NIR emitters (dataset)

Cite this