期刊
JOURNAL OF MATERIALS CHEMISTRY
卷 21, 期 40, 页码 16119-16128出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c1jm12566d
关键词
-
资金
- DARPA [N00014-06-1-0897]
- US Army Research Laboratory
- US Army Research Office [50372-CHMUR]
- National Science Foundation through the Science and Technology Center [DMR-0120967]
This paper reports the synthesis and electrochemical and optical properties of two molecular dyads (Dyad 1 and Dyad 2) consisting of a 2,7-bis(4-(diarylamino)styryl)carbazole two-photon-absorbing donor chromophore, connected by different linkers to a perylene diimide (PDI) acceptor. The photoinduced charge transfer in these compounds is characterised using transient absorption measurements. The use of the compounds for optical limiting is discussed; because of spectral overlap between the donor two-photon absorption band and the one-photon absorption band of the PDI radical anion, the dyads exhibit enhanced nonlinear absorption at wavelengths between 700 and 800 nm relative to that seen for the two-photon absorbing donor chromophore. The stronger nonlinear absorption observed for Dyad 1 vs. Dyad 2 is attributed to a higher yield of photo-generated radical ions and a longer lived charge-separated state, resulting from differences in the linker between the donor and acceptor.
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