期刊
DYES AND PIGMENTS
卷 96, 期 2, 页码 449-458出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.dyepig.2012.09.008
关键词
Fullerene; Naphthalenediimide; Photosensitizer; Triplet state; Triplet photosensitizer; Upconversion
资金
- NSFC [20972024, 21073028, 21273028]
- Royal Society (UK)
- NSFC (China-UK Cost-Share Science Networks) [21011130154]
- Fundamental Research Funds for the Central Universities [DUT10ZD212]
- Ministry of Education [NCET-08-0077]
- Dalian University of Technology
Two naphthalenediimide (NDI)-C-60 dyads that show strong absorption of visible light were prepared as heavy atom-free organic triplet photosensitizers. Alkylamino substituted NDI was used as the light-harvesting antennas and the C-60 unit was used as spin converter for the intersystem crossing (ISC) from singlet excited state to triplet excited state. Upon visible light photoexcitation, triplet excited states of the dyads are populated (lifetime is up to 90.1 mu s). Nanosecond time-resolved transient difference absorption spectroscopy indicated that the triplet excited state of the dyads is localized on either the NDI or the C-60 unit. As a proof of concept, the dyads are used as heavy-atom-free organic triplet photosensitizers for triplet-triplet annihilation based upconversion. C-60-organic chromophore dyads can be used as a general molecular structural motif of heavy-atom-free organic triplet photosensitizers, for which the photophysical properties can be readily changed by using different light-harvesting antennas, and the ISC property of these dyads is predictable. (C) 2012 Elsevier Ltd. All rights reserved.
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