para-Quinodimethane- Bridged Perylene Dimers and Pericondensed Quaterrylenes: The Effect of the Fusion Mode on the Ground States and Physical Properties
文献类型：会议论文
| 作者 | Das, Soumyajit; Lee, Sangsu; Son, Minjung; Zhu, Xiaojian; Zhang, Wenhua; Zheng, Bin; Hu, Pan; Zeng, Zebing; Sun, Zhe; Zeng, Wangdong |
| 出版日期 | 2014 |
| 关键词 | OPEN-SHELL PHOTOPHYSICAL PROPERTIES GRAPHENE NANORIBBONS KEKULE STRUCTURES CLOSED-SHELL HYDROCARBONS DYES ABSORPTION CHARACTER AROMATICITY |
| 卷号 | 20 |
| 期号 | 36 |
| DOI | 10.1002/chem.201402831 |
| 英文摘要 | Polycyclic hydrocarbon compounds with a singlet biradical ground state show unique physical properties and promising material applications; therefore, it is important to understand the fundamental structure/biradical character/physical properties relationships. In this study, para-quinodimethane (p-QDM)-bridged quinoidal perylene dimers 4 and 5 with different fusion modes and their corresponding aromatic counterparts, the pericondensed quaterrylenes 6 and 7, were synthesized. Their ground-state electronic structures and physical properties were studied by using various experiments assisted with DFT calculations. The proaromatic p-QDM-bridged perylene monoimide dimer 4 has a singlet biradical ground state with a small singlet/triplet energy gap (-2.97 kcal mol(-1)), whereas the antiaromatic s-indacene-bridged N-annulated perylene dimer 5 exists as a closed-shell quinoid with an obvious intramolecular charge-transfer character. Both of these dimers showed shorter singlet excited-state lifetimes, larger two-photon-absorption cross sections, and smaller energy gaps than the corresponding aromatic quaterrylene derivatives 6 and 7, respectively. Our studies revealed how the fusion mode and aromaticity affect the ground state and, consequently, the photophysical properties and electronic properties of a series of extended polycyclic hydrocarbon compounds. |
| 学科主题 | Chemistry |
| ISSN号 | 0947-6539 |
| 源URL | [http://ir.nimte.ac.cn/handle/174433/23554]  |
| 专题 | 会议专题 会议专题_会议论文 |
| 推荐引用方式 GB/T 7714 | Das, Soumyajit,Lee, Sangsu,Son, Minjung,et al. para-Quinodimethane- Bridged Perylene Dimers and Pericondensed Quaterrylenes: The Effect of the Fusion Mode on the Ground States and Physical Properties[C]. 见:. |
入库方式： OAI收割
来源：宁波材料技术与工程研究所
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