Tuning the luminescence lifetimes of ruthenium(II) polypyridine complexes and its application in luminescent oxygen sensing
文献类型：期刊论文
| 作者 | Ji, Shaomin1; Wu, Wanhua1; Wu, Wenting1; Song, Peng2; Han, Keli2; Wang, Zhonggang3; Liu, Shasha2; Guo, Huimin4; Zhao, Jianzhang1 |
| 刊名 | journal of materials chemistry
 |
| 出版日期 | 2010 |
| 卷号 | 20期号:10页码:1953-1963 |
| 英文摘要 | ru(phen)(bpy)(2) (1) and its new derivatives (2-5) with pyrenyl or ethynylated pyrene and phenyl units appended to the 3-position of the phenanthroline (phen) ligand were prepared and these complexes generate long-lived room temperature phosphorescence in the red and near ir range (600-800 nm). the photophysical properties of these complexes were investigated by uv-vis absorption, luminescence emission, transient absorption spectra and dft/tddft calculations. we found the luminescence lifetime (tau)can be drastically extended by ligand modification (increased up to 140-fold), e. g. tau = 58.4 mu s for complex 3 (with pyrenyl ethynylene appendents) was found, compared to tau = 0.4 mu s for the reference complex 1. ethynylated phenyl appendents alter the tau also (complex 2, tau = 2.4 mu s). with pyrenyl appendents (4 and 5), lifetimes of 2.5 mu s and 9.2 mu s were observed. we proposed three different mechanisms for the lifetime extension of 2, 3, 4 and 5. for 2, the stabilization of the (3)mlct state by pi-conjugation is responsible for the extension of the lifetime. for 3, the emissive state was assigned as an intra-ligand (il) long-lived (3)pi-pi* state ((3)il/(3)llct, intraligand or ligand-to-ligand charge transfer), whereas a c-c single bond linker results in a triplet state equilibrium between 3mlct state and the pyrene localized (3)pi-pi* triplet state ((3)il, e.g. 4 and 5). dft/tddft calculations support the assignment of the emissive states. the effects of the lifetime extension on the oxygen sensing properties of these complexes were studied in both solution and polymer films. with tuning the emissive states, and thus extension of the luminescence lifetimes, the luminescent o(2) sensing sensitivity of the complexes can be improved by ca. 77-fold in solution (i(0)/i(100) 1438 for complex 3, vs. i(0)/i(100) = 18.5 for complex 1). in impes-c polymer films, the apparent quenching constant k(sv)(app) is improved by 150-fold from 0.0023 torr(-1) (complex 1) to 0.35 torr(-1) (complex 3). the k(sv)(app) value of complex 3 is even higher than that of ptoep under similar conditions (0.15 torr(-1)). |
| WOS标题词 | science & technology ; physical sciences ; technology |
| 类目[WOS] | chemistry, physical ; materials science, multidisciplinary |
| 研究领域[WOS] | chemistry ; materials science |
| 关键词[WOS] | room-temperature phosphorescence ; transition-metal-complexes ; electron-transfer dynamics ; excited-state lifetimes ; ru-ii complexes ; charge-transfer ; photophysical properties ; energy-transfer ; spectroscopic properties ; triplet-state |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000274920500017 |
| 公开日期 | 2015-11-17 |
| 源URL | [http://159.226.238.44/handle/321008/141692]  |
| 专题 | 大连化学物理研究所_中国科学院大连化学物理研究所 |
| 作者单位 | 1.Dalian Univ Technol, Sch Chem Engn, State Key Lab Fine Chem, Dalian 116012, Peoples R China 2.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116023, Peoples R China 3.Dalian Univ Technol, Sch Chem Engn, Dept Polymer Sci & Mat, Dalian 116012, Peoples R China 4.Dalian Univ Technol, Sch Chem Engn, Dept Chem, Dalian 116012, Peoples R China |
| 推荐引用方式 GB/T 7714 | Ji, Shaomin,Wu, Wanhua,Wu, Wenting,et al. Tuning the luminescence lifetimes of ruthenium(II) polypyridine complexes and its application in luminescent oxygen sensing[J]. journal of materials chemistry,2010,20(10):1953-1963. |
| APA | Ji, Shaomin.,Wu, Wanhua.,Wu, Wenting.,Song, Peng.,Han, Keli.,...&Zhao, Jianzhang.(2010).Tuning the luminescence lifetimes of ruthenium(II) polypyridine complexes and its application in luminescent oxygen sensing.journal of materials chemistry,20(10),1953-1963. |
| MLA | Ji, Shaomin,et al."Tuning the luminescence lifetimes of ruthenium(II) polypyridine complexes and its application in luminescent oxygen sensing".journal of materials chemistry 20.10(2010):1953-1963. |
入库方式： OAI收割
来源：大连化学物理研究所
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