期刊
CHEMISTRY-A EUROPEAN JOURNAL
卷 25, 期 24, 页码 6124-6130出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201806076
关键词
photochemistry; photon upconversion; steric hindrance; supramolecular chemistry; triplet-triplet annihilation
资金
- JSPS KAKENHI [JP25220805, JP17H04799, JP16H06513, JP16H00844]
- PRESTO program on Molecular Technology and Creation of New Functions from JST [JPMJPR14KE]
- Murata Science Foundation
A common challenge in chemistry that deals with photoexcited states is to avoid oxygen quenching. This is crucial for hot research fields such as photon upconversion (UC), in which oxygen-sensitive triplet excited states play pivotal roles. However, methods to avoid oxygen quenching in aqueous media are far more limited despite eagerly anticipated catalytic and biological applications. This work introduces a simple strategy to achieve air-stable triplet-triplet annihilation (TTA)-based UC in water, namely, supramolecular crowding. Amphiphilic cationic acceptor molecules and anions with long alkyl chains co-assemble in water in which hydrophobic donor molecules are molecularly dispersed. Despite the common notion that oxygen molecules diffuse readily across hydrophobic domains in water, more than 80 % of the TTA-UC emission of the obtained hydrophobic co-assemblies is maintained in air-saturated water. This work demonstrates the new promising potential of supramolecular chemistry for photophysical and photochemical functions with oxygen-sensitive species.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据