Remote Sensitized Photoisomerization via Through-Bond Triplet-Triplet Energy Transfer Mediated by a Salt Bridge in a Supramolecular Dyad
文献类型：期刊论文
| 作者 | Han, Lei1; Wei, Hengxing1; Li, Shayu2; Chen, Jinping1; Zeng, Yi1; Li, Ying-Ying1; Han, Yongbin1; Li, Yi1; Wang, Shuangqing2; Yang, Guoqiang2 |
| 刊名 | CHEMPHYSCHEM
 |
| 出版日期 | 2010-01-18 |
| 卷号 | 11期号:1页码:229-235 |
| 关键词 | Energy Transfer Phosphorescence Photoisomerization Salt Bridges Supramolecular Chemistry |
| ISSN号 | 1439-4235 |
| DOI | 10.1002/cphc.200900556 |
| 英文摘要 | A supramolecular dyad, BP-(amidinium-carboxylate)-NBD is constructed, in which benzophenone (BP) and norbornadiene (NBD) are connected via an amidinium-carboxylate salt bridge. The photophysical and photochemical properties of the assembled BP-(amidinium-carboxylate)-NBD dyad are examined. The phosphorescence of the BP chromophore is efficiently quenched by the NBD group in BP-(amidinium-carboxylate)-NBD via the salt bridge. Time-resolved spectroscopy measurements indicate that the lifetime of the BP triplet state in BP(amidinium-carboxylate)-NBD is shortened clue to the quenching by the NBD group. Selective excitation of the BP chromophore results in isomerization of the NBD group to quadricyclane (QC). All of these observations suggest that the triplet-triplet energy transfer occurs efficiently in the BP-(amidinium-carboxylate)-NBD salt bridge system. The triplet-triplet energy transfer process proceeds with efficiencies of approximately 0.87, 0.98 and the rate constants 1.8 x 10(3) s(-1), and 1.3 x 10(7) s(-1) at 77 K and room temperature, respectively. The mechanism for the triplet-triplet energy transfer is proposed to proceed via a "through-bond" electron exchange process, and the non-covalent bonds amidinium-carboxylate salt bridge can mediate the triplet-triplet energy transfer process effectively for photochemical conversion. |
| 语种 | 英语 |
| WOS记录号 | WOS:000274265300030 |
| 出版者 | WILEY-V C H VERLAG GMBH |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/69067]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Chen, Jinping |
| 作者单位 | 1.Chinese Acad Sci, Tech Inst Phys & Chem, Key Lab Photochem Convers & Optoelect Mat, Beijing 100190, Peoples R China 2.Chinese Acad Sci, Inst Chem, Key Lab Photochem, BNLMS, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | Han, Lei,Wei, Hengxing,Li, Shayu,et al. Remote Sensitized Photoisomerization via Through-Bond Triplet-Triplet Energy Transfer Mediated by a Salt Bridge in a Supramolecular Dyad[J]. CHEMPHYSCHEM,2010,11(1):229-235. |
| APA | Han, Lei.,Wei, Hengxing.,Li, Shayu.,Chen, Jinping.,Zeng, Yi.,...&Yang, Guoqiang.(2010).Remote Sensitized Photoisomerization via Through-Bond Triplet-Triplet Energy Transfer Mediated by a Salt Bridge in a Supramolecular Dyad.CHEMPHYSCHEM,11(1),229-235. |
| MLA | Han, Lei,et al."Remote Sensitized Photoisomerization via Through-Bond Triplet-Triplet Energy Transfer Mediated by a Salt Bridge in a Supramolecular Dyad".CHEMPHYSCHEM 11.1(2010):229-235. |
入库方式： OAI收割
来源：化学研究所
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