Iridium complexes bearing paraphenylene or tetraphenylmethane ligands as novel emitting materials

Chie Honda; Kazuo Takimiya; Tetsuo Otsubo; Yoshio Aso

Iridium complexes bearing paraphenylene or tetraphenylmethane ligands as novel emitting materials

Chie Honda, Kazuo Takimiya, Tetsuo Otsubo, Yoshio Aso

SCI - Chemistry

Research output: Contribution to conference › Paper › peer-review

Abstract

We synthesized novel iridium complexes bearing paraphenylene or tetraphenylmethane ligands. The solution absorption spectra of 3a^-c show an MLCT band together with the local excitation transitions of their ligands. Solution emission spectra are red-shifted and weakened as compared to that of Ir(ppy)₃. This result indicates that the introduced π-conjugated groups markedly affected the photophysical decay process. In contrast to the case of Ir(ppy)₃, the film emission spectra of 3a^-c are observed because of prevention of concentration quenching due to the bulky ligand groups. Organic electroluminescence devices using the iridium complexes show green emission.

Original language	English
Pages	1340
Number of pages	1
Publication status	Published - 2005
Event	54th SPSJ Annual Meeting 2005 - Yokohama, Japan Duration: 2005 May 25 → 2005 May 27

Conference

Conference	54th SPSJ Annual Meeting 2005
Country/Territory	Japan
City	Yokohama
Period	05/5/25 → 05/5/27

Keywords

Emission spectrum
Iridium complex
Organic electroluminescence

Cite this

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title = "Iridium complexes bearing paraphenylene or tetraphenylmethane ligands as novel emitting materials",

abstract = "We synthesized novel iridium complexes bearing paraphenylene or tetraphenylmethane ligands. The solution absorption spectra of 3a-c show an MLCT band together with the local excitation transitions of their ligands. Solution emission spectra are red-shifted and weakened as compared to that of Ir(ppy)3. This result indicates that the introduced π-conjugated groups markedly affected the photophysical decay process. In contrast to the case of Ir(ppy)3, the film emission spectra of 3a-c are observed because of prevention of concentration quenching due to the bulky ligand groups. Organic electroluminescence devices using the iridium complexes show green emission.",

keywords = "Emission spectrum, Iridium complex, Organic electroluminescence",

author = "Chie Honda and Kazuo Takimiya and Tetsuo Otsubo and Yoshio Aso",

year = "2005",

language = "English",

pages = "1340",

note = "54th SPSJ Annual Meeting 2005 ; Conference date: 25-05-2005 Through 27-05-2005",

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TY - CONF

T1 - Iridium complexes bearing paraphenylene or tetraphenylmethane ligands as novel emitting materials

AU - Honda, Chie

AU - Takimiya, Kazuo

AU - Otsubo, Tetsuo

AU - Aso, Yoshio

PY - 2005

Y1 - 2005

N2 - We synthesized novel iridium complexes bearing paraphenylene or tetraphenylmethane ligands. The solution absorption spectra of 3a-c show an MLCT band together with the local excitation transitions of their ligands. Solution emission spectra are red-shifted and weakened as compared to that of Ir(ppy)3. This result indicates that the introduced π-conjugated groups markedly affected the photophysical decay process. In contrast to the case of Ir(ppy)3, the film emission spectra of 3a-c are observed because of prevention of concentration quenching due to the bulky ligand groups. Organic electroluminescence devices using the iridium complexes show green emission.

AB - We synthesized novel iridium complexes bearing paraphenylene or tetraphenylmethane ligands. The solution absorption spectra of 3a-c show an MLCT band together with the local excitation transitions of their ligands. Solution emission spectra are red-shifted and weakened as compared to that of Ir(ppy)3. This result indicates that the introduced π-conjugated groups markedly affected the photophysical decay process. In contrast to the case of Ir(ppy)3, the film emission spectra of 3a-c are observed because of prevention of concentration quenching due to the bulky ligand groups. Organic electroluminescence devices using the iridium complexes show green emission.

KW - Emission spectrum

KW - Iridium complex

KW - Organic electroluminescence

UR - http://www.scopus.com/inward/record.url?scp=33645645657&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=33645645657&partnerID=8YFLogxK

M3 - Paper

AN - SCOPUS:33645645657

SP - 1340

T2 - 54th SPSJ Annual Meeting 2005

Y2 - 25 May 2005 through 27 May 2005

ER -

Iridium complexes bearing paraphenylene or tetraphenylmethane ligands as novel emitting materials

Abstract

Conference

Keywords

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