Tuning the emission of cyclometalated iridium complexes by simple ligand modification

Andrew Beeby; Sylvia Bettington; Ifor D.W. Samuel; Zhenjia Wang

doi:10.1039/b207502d

Tuning the emission of cyclometalated iridium complexes by simple ligand modification

Andrew Beeby
, Sylvia Bettington
, Ifor D.W. Samuel
, Zhenjia Wang

Pharmaceutical Sciences

University at Buffalo

Durham University
University of St Andrews

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

117 Scopus citations

Abstract

The photo-excitation and relaxation of a new cyclometalated complex, Ir(ppy)₂fppy, is investigated through the measurement of absorption and photoluminescence spectra. Comparison of Ir(ppy)₂fppy with Ir(ppy)₃ reveals that the lowest energy excited state of Ir(ppy)₂fppy is localised on the aldehyde-substituted ligand, thus giving the complex its characteristic orange emission (λ_max ≈ 600 nm). OLEDs containing Ir(ppy)₂fppy doped into poly(vinylcarbazole) (PVK) exhibit the same characteristic emission as found in solution, implying efficient energy transfer between the PVK and the iridium complex. Our results provide the potential for the synthesis of iridium complexes with different emission wavelengths through the modification of only one ligand.

Original language	English
Pages (from-to)	80-83
Number of pages	4
Journal	Journal of Materials Chemistry
Volume	13
Issue number	1
DOIs	https://doi.org/10.1039/b207502d
State	Published - Jan 1 2003

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title = "Tuning the emission of cyclometalated iridium complexes by simple ligand modification",

abstract = "The photo-excitation and relaxation of a new cyclometalated complex, Ir(ppy)2fppy, is investigated through the measurement of absorption and photoluminescence spectra. Comparison of Ir(ppy)2fppy with Ir(ppy)3 reveals that the lowest energy excited state of Ir(ppy)2fppy is localised on the aldehyde-substituted ligand, thus giving the complex its characteristic orange emission (λmax ≈ 600 nm). OLEDs containing Ir(ppy)2fppy doped into poly(vinylcarbazole) (PVK) exhibit the same characteristic emission as found in solution, implying efficient energy transfer between the PVK and the iridium complex. Our results provide the potential for the synthesis of iridium complexes with different emission wavelengths through the modification of only one ligand.",

author = "Andrew Beeby and Sylvia Bettington and Samuel, \{Ifor D.W.\} and Zhenjia Wang",

year = "2003",

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doi = "10.1039/b207502d",

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journal = "Journal of Materials Chemistry",

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T1 - Tuning the emission of cyclometalated iridium complexes by simple ligand modification

AU - Beeby, Andrew

AU - Bettington, Sylvia

AU - Samuel, Ifor D.W.

AU - Wang, Zhenjia

PY - 2003/1/1

Y1 - 2003/1/1

N2 - The photo-excitation and relaxation of a new cyclometalated complex, Ir(ppy)2fppy, is investigated through the measurement of absorption and photoluminescence spectra. Comparison of Ir(ppy)2fppy with Ir(ppy)3 reveals that the lowest energy excited state of Ir(ppy)2fppy is localised on the aldehyde-substituted ligand, thus giving the complex its characteristic orange emission (λmax ≈ 600 nm). OLEDs containing Ir(ppy)2fppy doped into poly(vinylcarbazole) (PVK) exhibit the same characteristic emission as found in solution, implying efficient energy transfer between the PVK and the iridium complex. Our results provide the potential for the synthesis of iridium complexes with different emission wavelengths through the modification of only one ligand.

AB - The photo-excitation and relaxation of a new cyclometalated complex, Ir(ppy)2fppy, is investigated through the measurement of absorption and photoluminescence spectra. Comparison of Ir(ppy)2fppy with Ir(ppy)3 reveals that the lowest energy excited state of Ir(ppy)2fppy is localised on the aldehyde-substituted ligand, thus giving the complex its characteristic orange emission (λmax ≈ 600 nm). OLEDs containing Ir(ppy)2fppy doped into poly(vinylcarbazole) (PVK) exhibit the same characteristic emission as found in solution, implying efficient energy transfer between the PVK and the iridium complex. Our results provide the potential for the synthesis of iridium complexes with different emission wavelengths through the modification of only one ligand.

UR - https://www.scopus.com/pages/publications/0037247877

U2 - 10.1039/b207502d

DO - 10.1039/b207502d

M3 - Article

SN - 0959-9428

VL - 13

SP - 80

EP - 83

JO - Journal of Materials Chemistry

JF - Journal of Materials Chemistry

IS - 1

ER -

Tuning the emission of cyclometalated iridium complexes by simple ligand modification

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