Electrochemical and Phosphorescent Properties of New Ir(III) Complexes Coordinated by Various Bipyridine Derivatives
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- YOSHIKAWA Naokazu
- Department of Chemistry, Faculty of Science, Nara Women’s University
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- SAKAMOTO Jun
- Department of Chemistry, Nara University of Education
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- MATSUMURA-INOUE Takeko
- Department of Chemistry, Nara University of Education
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- TAKASHIMA Hiroshi
- Department of Chemistry, Faculty of Science, Nara Women’s University
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- TSUKAHARA Keiichi
- Department of Chemistry, Faculty of Science, Nara Women’s University
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- KANEHISA Nobuko
- Department of Applied Chemistry, Graduate School of Engineering Osaka University
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- KAI Yasushi
- Department of Applied Chemistry, Graduate School of Engineering Osaka University
書誌事項
- タイトル別名
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- Electrochemical and Phosphorescent Properties of New Ir 3 Complexes Coordinated by Various Bipyridine Derivatives
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Four useful polypyridine iridium(III) complexes in the form of [IrCl2L2]+ were prepared and their spectroscopic and electrochemical properties as well as X-ray crystallography were investigated. The ligands used were L = 2,2′-bipyridine, 4,4′-dimethyl-2,2′-bipyridine, 4,4′-diphenyl-2,2′-bipyridine, 1,10-phenanthroline, 4,7-diphenyl-1,10-phenanthroline, and 2,2′-biquinoline. Synthetic methods were developed by a sequential ligand-replacement, which occurred in the reaction vessel using a microwave oven. All complexes showed that LUMOs are based on the π-system contribution of the polypyridine ligand for [IrCl2(bpy)2]+, [IrCl2(dmbpy)2]+, [IrCl2(dpbpy)2]+, [IrCl2(phen)2]+, [IrCl2(dpphen)2]+ and [IrCl2(bqn)2]+. The HOMOs are also localized on the polypyridine ligand in the iridium complexes. It was found that [IrCl2L2]+ emits intense phosphorescence at room temperature. In particular, the use of dpbpy as ancillary ligands extends the lifetime (660 ns) of the 3(π-π*) excited states of Ir(III) polypyridine complexes. The complex [IrCl2(bqn)2]+ with electron acceptor substituents shows a large red-shift to 622 nm. It is noticed that iridium polypyridine complexes show intense emissions at various colors, such as yellow for [IrCl2(dmbpy)2]+ and red for [IrCl2(bqn)2]+, which can be applied to photosensitizers. The spectroscopic and electrochemical details are also reported herein.
収録刊行物
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- Analytical Sciences
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Analytical Sciences 20 (4), 711-716, 2004
社団法人 日本分析化学会
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詳細情報 詳細情報について
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- CRID
- 1390001204258543616
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- NII論文ID
- 10012851061
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- NII書誌ID
- AA10500785
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- COI
- 1:CAS:528:DC%2BD2cXjsVGlur0%3D
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- ISSN
- 13482246
- 09106340
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- NDL書誌ID
- 6912254
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- PubMed
- 15116974
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
- Crossref
- PubMed
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可