Synthesis and characterization of green-to-yellow emissive Ir(III) complexes of pyridylbenzothiadiazine ligand

Amlan Kumar Pal; David Bradford Cordes; Konstantina Pringouri; Muhammad Anwar; Alexandra Martha Zoya Slawin; Jeremy Rawson; Eli Zysman-Colman

doi:10.1080/00958972.2016.1170818

Synthesis and characterization of green-to-yellow emissive Ir(III) complexes of pyridylbenzothiadiazine ligand

Amlan Kumar Pal, David Bradford Cordes, Konstantina Pringouri, Muhammad Anwar, Alexandra Martha Zoya Slawin, Jeremy Rawson, Eli Zysman-Colman

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

Abstract

Reaction of Tetrakis(2-phenylpyridinato-C²,N')(μ-dichloro)di-iridium with 3-(pyridin-2-yl)-4H-benzo[e][1,2,4]thiadiazine (L1) under neutral and basic media afforded the charged and neutral Ir-complexes, 1 and 2, respectively, in good yields (63 – 79%). Single crystal XRD analysis confirms that the ancillary ligands in both 1 and 2 binds to the iridium via coordination of N2 of the benzo[e][1,2,4]thiadiazine. Upon isolation of the neutral complex, the sulfur atom rapidly oxidizes to form 2. The UV-vis absorption spectra of the complexes exhibit both ligand-centered and mixed metal-to-ligand and ligand-to-ligand charged transfer (CT) transitions that are typical of many heteroleptic iridium complexes. Complexes 1 and 2 were found to be emissive at room temperature in the green and yellow region of the electromagnetic spectrum, respectively, albeit with poor photoluminescence quantum yield (ΦPL = 1.1 – 2.5%).

Original language	English
Pages (from-to)	1924-1937
Number of pages	14
Journal	Journal of Coordination Chemistry
Volume	69
Issue number	11-13
Early online date	18 Apr 2016
DOIs	https://doi.org/10.1080/00958972.2016.1170818
Publication status	Published - 2016

Keywords

Ir-complex
Benzothiadiazine ligand
DFT studies
XRD analysis
Photophysics
Electrochemistry

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Blue-Emitting Phospors: Blue-emitting Phosphors for Solid State Lighting Applications
Zysman-Colman, E. (PI)
EPSRC
1/06/15 → 30/09/19
Project: Standard

Data underpinning - Synthesis and Characterization of Green-to-Yellow Emissive Ir(III) Complexes of Pyridylbenzothiadiazine Ligand
Pal, A. K. (Creator), Cordes, D. B. (Creator), Pringouri, K. (Creator), Anwar, M. U. (Creator), Slawin, A. M. Z. (Creator), Rawson, J. M. (Creator) & Zysman-Colman, E. (Creator), University of St Andrews, 5 Apr 2016
DOI: 10.17630/f6bed3a1-bc10-464a-83fa-5fa6ac8a9c4b
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Cite this

@article{33a4db295fcd4ddea403265b1eb076c3,

title = "Synthesis and characterization of green-to-yellow emissive Ir(III) complexes of pyridylbenzothiadiazine ligand",

abstract = "Reaction of Tetrakis(2-phenylpyridinato-C2,N')(μ-dichloro)di-iridium with 3-(pyridin-2-yl)-4H-benzo[e][1,2,4]thiadiazine (L1) under neutral and basic media afforded the charged and neutral Ir-complexes, 1 and 2, respectively, in good yields (63 – 79%). Single crystal XRD analysis confirms that the ancillary ligands in both 1 and 2 binds to the iridium via coordination of N2 of the benzo[e][1,2,4]thiadiazine. Upon isolation of the neutral complex, the sulfur atom rapidly oxidizes to form 2. The UV-vis absorption spectra of the complexes exhibit both ligand-centered and mixed metal-to-ligand and ligand-to-ligand charged transfer (CT) transitions that are typical of many heteroleptic iridium complexes. Complexes 1 and 2 were found to be emissive at room temperature in the green and yellow region of the electromagnetic spectrum, respectively, albeit with poor photoluminescence quantum yield (ΦPL = 1.1 – 2.5%).",

keywords = "Ir-complex, Benzothiadiazine ligand , DFT studies, XRD analysis, Photophysics, Electrochemistry",

author = "Pal, {Amlan Kumar} and Cordes, {David Bradford} and Konstantina Pringouri and Muhammad Anwar and Slawin, {Alexandra Martha Zoya} and Jeremy Rawson and Eli Zysman-Colman",

note = "EZ-C acknowledges the University of St Andrews for financial support. The authors are grateful to the EPSRC for financial support from grant EP/M02105X/1. JMR would like to thank NSERC Canada, the Canada Research Chair Program and CFI/ORF for financial support. KP acknowledges financial support through the Ontario Trillium Scholarship program.",

year = "2016",

doi = "10.1080/00958972.2016.1170818",

language = "English",

volume = "69",

pages = "1924--1937",

journal = "Journal of Coordination Chemistry",

issn = "0095-8972",

publisher = "Taylor & Francis",

number = "11-13",

}

TY - JOUR

T1 - Synthesis and characterization of green-to-yellow emissive Ir(III) complexes of pyridylbenzothiadiazine ligand

AU - Pal, Amlan Kumar

AU - Cordes, David Bradford

AU - Pringouri, Konstantina

AU - Anwar, Muhammad

AU - Slawin, Alexandra Martha Zoya

AU - Rawson, Jeremy

AU - Zysman-Colman, Eli

N1 - EZ-C acknowledges the University of St Andrews for financial support. The authors are grateful to the EPSRC for financial support from grant EP/M02105X/1. JMR would like to thank NSERC Canada, the Canada Research Chair Program and CFI/ORF for financial support. KP acknowledges financial support through the Ontario Trillium Scholarship program.

PY - 2016

Y1 - 2016

N2 - Reaction of Tetrakis(2-phenylpyridinato-C2,N')(μ-dichloro)di-iridium with 3-(pyridin-2-yl)-4H-benzo[e][1,2,4]thiadiazine (L1) under neutral and basic media afforded the charged and neutral Ir-complexes, 1 and 2, respectively, in good yields (63 – 79%). Single crystal XRD analysis confirms that the ancillary ligands in both 1 and 2 binds to the iridium via coordination of N2 of the benzo[e][1,2,4]thiadiazine. Upon isolation of the neutral complex, the sulfur atom rapidly oxidizes to form 2. The UV-vis absorption spectra of the complexes exhibit both ligand-centered and mixed metal-to-ligand and ligand-to-ligand charged transfer (CT) transitions that are typical of many heteroleptic iridium complexes. Complexes 1 and 2 were found to be emissive at room temperature in the green and yellow region of the electromagnetic spectrum, respectively, albeit with poor photoluminescence quantum yield (ΦPL = 1.1 – 2.5%).

AB - Reaction of Tetrakis(2-phenylpyridinato-C2,N')(μ-dichloro)di-iridium with 3-(pyridin-2-yl)-4H-benzo[e][1,2,4]thiadiazine (L1) under neutral and basic media afforded the charged and neutral Ir-complexes, 1 and 2, respectively, in good yields (63 – 79%). Single crystal XRD analysis confirms that the ancillary ligands in both 1 and 2 binds to the iridium via coordination of N2 of the benzo[e][1,2,4]thiadiazine. Upon isolation of the neutral complex, the sulfur atom rapidly oxidizes to form 2. The UV-vis absorption spectra of the complexes exhibit both ligand-centered and mixed metal-to-ligand and ligand-to-ligand charged transfer (CT) transitions that are typical of many heteroleptic iridium complexes. Complexes 1 and 2 were found to be emissive at room temperature in the green and yellow region of the electromagnetic spectrum, respectively, albeit with poor photoluminescence quantum yield (ΦPL = 1.1 – 2.5%).

KW - Ir-complex

KW - Benzothiadiazine ligand

KW - DFT studies

KW - XRD analysis

KW - Photophysics

KW - Electrochemistry

U2 - 10.1080/00958972.2016.1170818

DO - 10.1080/00958972.2016.1170818

M3 - Article

SN - 0095-8972

VL - 69

SP - 1924

EP - 1937

JO - Journal of Coordination Chemistry

JF - Journal of Coordination Chemistry

IS - 11-13

ER -

Synthesis and characterization of green-to-yellow emissive Ir(III) complexes of pyridylbenzothiadiazine ligand

Abstract

Keywords

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Blue-Emitting Phospors: Blue-emitting Phosphors for Solid State Lighting Applications

Datasets

Data underpinning - Synthesis and Characterization of Green-to-Yellow Emissive Ir(III) Complexes of Pyridylbenzothiadiazine Ligand

Cite this