Bis(pyrazol-1-yl)methane as Non-Chromophoric Ancillary Ligand for Charged Bis-Cyclometalated Iridium(III) Complexes
文献类型：期刊论文
| 作者 | Meng, S ; Jung, I ; Feng, J ; Scopelliti, R ; Di Censo, D ; Gratzel, M ; Nazeeruddin, MK ; Baranoff, E |
| 刊名 | EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
 |
| 出版日期 | 2012 |
| 期号 | 19页码:3209 |
| 关键词 | EMITTING ELECTROCHEMICAL-CELLS PHOTOPHYSICAL PROPERTIES IR(III) COMPLEXES BLUE-GREEN LIGHT PHOSPHORESCENT DERIVATIVES EMITTERS DESIGN COLOR |
| ISSN号 | 1434-1948 |
| 通讯作者 | Meng, S: Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China. |
| 中文摘要 | New charged cyclometalated iridium(III) complexes [Ir(ppy)2(L)](PF6) [ppy = 2-phenylpyridine; L = bis(pyrazol-1-yl)methane (for 1); L = bis(3,5-dimethylpyrazol-1-yl)methane (for 2)] were synthesized and their electrochemical and photophysical properties studied. These complexes with non-p-electron-conjugated ancillary chelates exhibit significantly blueshifted emission relative to those of commonly used derivatives with NN ancillary ligands such as bipyridine or phenanthroline. Both X-ray and theoretical analysis based on time-dependent density functional theory (TD-DFT) reveal that the binding of Ir to the bis(pyrazol-1-yl)methane ancillary ligand is much weaker than that to the phenylpyridine main ligand; the effect is enhanced in the excited state. As a result, the ancillary ligand does not participate in low-energy excitations and triplet emission, and the electronic transitions are concentrated on the main chromophoric ligands. The blueshift feature is attributed to emission originating from the main cyclometalated ligands, in contrast to emitters with the NN chromophoric ancillary ligand. In addition, complex 2 exhibits a one order of magnitude higher non-radiative decay rate than complex 1, which is attributed to the steric hindrance of the methyl groups that leads to a more loosely bound ancillary ligand. |
| 收录类别 | SCI |
| 资助信息 | CAS; National Natural Science Foundation of China (NSFC) [11074287]; MOST [2012CB921403]; European Union (CELLO) [STRP 248043] |
| 语种 | 英语 |
| 公开日期 | 2013-09-17 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/34251]  |
| 专题 | 物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文 |
| 推荐引用方式 GB/T 7714 | Meng, S,Jung, I,Feng, J,et al. Bis(pyrazol-1-yl)methane as Non-Chromophoric Ancillary Ligand for Charged Bis-Cyclometalated Iridium(III) Complexes[J]. EUROPEAN JOURNAL OF INORGANIC CHEMISTRY,2012(19):3209. |
| APA | Meng, S.,Jung, I.,Feng, J.,Scopelliti, R.,Di Censo, D.,...&Baranoff, E.(2012).Bis(pyrazol-1-yl)methane as Non-Chromophoric Ancillary Ligand for Charged Bis-Cyclometalated Iridium(III) Complexes.EUROPEAN JOURNAL OF INORGANIC CHEMISTRY(19),3209. |
| MLA | Meng, S,et al."Bis(pyrazol-1-yl)methane as Non-Chromophoric Ancillary Ligand for Charged Bis-Cyclometalated Iridium(III) Complexes".EUROPEAN JOURNAL OF INORGANIC CHEMISTRY .19(2012):3209. |
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来源：物理研究所
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