Fluorenyl-substituted silole molecules: geometric, electronic, optical, and device properties
文献类型：期刊论文
| 作者 | Zhan, Xiaowei1,2,3,4; Haldi, Andreas2,5; Risko, Chad1,2; Chan, Calvin K.6; Zhao, Wei6; Timofeeva, Tatiana V.7; Korlyukov, Aleksander7; Antipin, Mikhail Yu.7; Montgomery, Sarah2,5; Thompson, Evans2,5 |
| 刊名 | JOURNAL OF MATERIALS CHEMISTRY
 |
| 出版日期 | 2008 |
| 卷号 | 18期号:26页码:3157-3166 |
| ISSN号 | 0959-9428 |
| DOI | 10.1039/b803470b |
| 英文摘要 | A series of silole molecules with fluorenyl substituents at varying positions-1-(9,9-dimethylfluoren-2-yl)-1,2,3,4,5-pentaphenylsilole, 1-(fluoren-9-yl)-1,2,3,4,5-pentaphenylsilole, 1,1,3,4-tetraphenyl-2, 5-bis(9,9-dimethylfluoren-2-yl) silole, and 1,1-diphenyl-2,3,4,5-tetrakis(9,9-dimethylfluoren-2-yl)silole-has been synthesized and compared to the previously reported compounds, 1,1,2,3,4,5-hexaphenylsilole and 1,1-bis(9,9-dimethylfluoren-2-yl)-2,3,4,5-tetraphenylsilole. The effect of fluorenyl substitution pattern on the geometric, thermal, electronic, optical, and electroluminescence properties was investigated both experimentally and theoretically. Analysis of the X-ray crystal packing diagrams for two new fluorenyl-substituted siloles indicates the presence of pi-pi stacking and CH center dot center dot center dot pi interactions in the solid state. Across the series, excellent thermal and morphological stabilities are displayed. Photoelectron/inverse-photoelectron spectroscopy measurements and density functional theory (DFT) calculations suggest that increased conjugation length through substitution at the 2- and 5-positions plays a more significant role in tuning the ionization potentials and electron affinities of these siloles than do inductive effects through substitution of the silicon. The electronic structure (e. g., HOMO-LUMO gap) and, hence, the optical absorption and fluorescence properties are also sensitive to the positions at which the fluorenyl groups are introduced, with substitution at the 2,5-positions having the largest effect. Solution-processed electroluminescent devices fabricated with the fluorenyl-substituted siloles as the emissive layer have luminous efficiencies as high as 3.6 cd A(-1). |
| 语种 | 英语 |
| WOS记录号 | WOS:000257125800011 |
| 出版者 | ROYAL SOC CHEMISTRY |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/63347]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Zhan, Xiaowei |
| 作者单位 | 1.Georgia Inst Technol, Sch Chem & Biochem, Atlanta, GA 30332 USA 2.Georgia Inst Technol, Ctr Organ Photon & Elect, Atlanta, GA 30332 USA 3.Chinese Acad Sci, Inst Chem, Beijing Natl Lab Mol Sci, Beijing 100080, Peoples R China 4.Chinese Acad Sci, Inst Chem, Key Lab Organ Solids, Beijing 100080, Peoples R China 5.Georgia Inst Technol, Sch Elect & Comp Engn, Atlanta, GA 30332 USA 6.Princeton Univ, Dept Elect Engn, Princeton, NJ 08544 USA 7.New Mexico Highlands Univ, Dept Nat Sci, Las Vegas, NM 87701 USA |
| 推荐引用方式 GB/T 7714 | Zhan, Xiaowei,Haldi, Andreas,Risko, Chad,et al. Fluorenyl-substituted silole molecules: geometric, electronic, optical, and device properties[J]. JOURNAL OF MATERIALS CHEMISTRY,2008,18(26):3157-3166. |
| APA | Zhan, Xiaowei.,Haldi, Andreas.,Risko, Chad.,Chan, Calvin K..,Zhao, Wei.,...&Marder, Seth R..(2008).Fluorenyl-substituted silole molecules: geometric, electronic, optical, and device properties.JOURNAL OF MATERIALS CHEMISTRY,18(26),3157-3166. |
| MLA | Zhan, Xiaowei,et al."Fluorenyl-substituted silole molecules: geometric, electronic, optical, and device properties".JOURNAL OF MATERIALS CHEMISTRY 18.26(2008):3157-3166. |
入库方式： OAI收割
来源：化学研究所
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