Photophysical Properties of Self-Assembled Multinuclear Platinum Metallacycles with Different Conformational Geometries
文献类型：期刊论文
| 作者 | Chen, Jun-Sheng1,2; Zhao, Guang-Jiu1; Cook, Timothy R.3; Han, Ke-Li1; Stang, Peter J.3 |
| 刊名 | journal of the american chemical society
 |
| 出版日期 | 2013-05-01 |
| 卷号 | 135期号:17页码:6694-6702 |
| ISSN号 | 0002-7863 |
| 产权排序 | 待补充 |
| 通讯作者 | 韩克利 ; peter j. stang |
| 合作状况 | 英 |
| 英文摘要 | in this work, spectroscopic techniques and quantum chemistry calculations were used to investigate the photophysical properties of various multinuclear platinum complexes with different conformational geometries. this suite of complexes includes a pt-pyridyl square, a pt-carboxylate triangle, and a mixed pt-pyridyl-carboxylate rectangle, as well as two mononuclear pt model complexes. studying the individual molecular precursors in the context of larger assemblies is important to provide a complete understanding of the factors governing the observed photophysical properties of a given system. the absorption and emission bands of the parent linear dipyridyl donor (ligand 1) are largely preserved in the [4 + 4] square and the multicomponent [4 + 2 + 2] rectangle (3 and 4, respectively), with significant red shifts. the [3 + 3] pt-carboxylate triangle containing p-phthalic acid is nonemissive. phosphorescence and nanosecond transient spectroscopy on 3 and 4 reveal that the introduction of platinum atoms enhances spin-orbital coupling, thereby increasing the rate of intersystem crossing. this phenomenon is consistent with the low fluorescence quantum yields and short fluorescence lifetimes of 3 and 4. moreover, the electronic structures for the ground state and low-lying excited states of these compounds were studied using quantum chemistry calculations. the fluorescent states of the platinum complexes are local excited states of ligand-centered pi-pi* transition features, whereas the nonfluorescent states are intramolecular charge-transfer states. these low-lying intramolecular charge-transfer states are responsible for the nonemissive nature of small molecules 1 and 2 and triangle s. as the interactions between these components determine the properties of their corresponding assemblies, we establish novel excited-state decay mechanisms which dictate the observed spectra. |
| WOS标题词 | science & technology ; physical sciences |
| 学科主题 | 物理化学 |
| 类目[WOS] | chemistry, multidisciplinary |
| 研究领域[WOS] | chemistry |
| 关键词[WOS] | density-functional calculations ; triplet excited-states ; gaussian-basis sets ; charge-transfer ; molecular design ; atoms li ; complexes ; coordination ; fluorescence ; symmetry |
| 收录类别 | SCI |
| 资助信息 | 1，1 |
| 原文出处 | 6702 |
| 语种 | 英语 |
| WOS记录号 | WOS:000318469100046 |
| 公开日期 | 2014-09-11 |
| 源URL | [http://159.226.238.44/handle/321008/119411]  |
| 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.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Mol React Dynam, Dalian 116023, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Univ Utah, Dept Chem, Salt Lake City, UT 84112 USA |
| 推荐引用方式 GB/T 7714 | Chen, Jun-Sheng,Zhao, Guang-Jiu,Cook, Timothy R.,et al. Photophysical Properties of Self-Assembled Multinuclear Platinum Metallacycles with Different Conformational Geometries[J]. journal of the american chemical society,2013,135(17):6694-6702. |
| APA | Chen, Jun-Sheng,Zhao, Guang-Jiu,Cook, Timothy R.,Han, Ke-Li,&Stang, Peter J..(2013).Photophysical Properties of Self-Assembled Multinuclear Platinum Metallacycles with Different Conformational Geometries.journal of the american chemical society,135(17),6694-6702. |
| MLA | Chen, Jun-Sheng,et al."Photophysical Properties of Self-Assembled Multinuclear Platinum Metallacycles with Different Conformational Geometries".journal of the american chemical society 135.17(2013):6694-6702. |
入库方式： OAI收割
来源：大连化学物理研究所
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