- PDI-based heteroacenes as acceptors for fullerene-free solar cells: Importance of their twisted geometry
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Two perylenediimide (PDI) derivatives (FP4TT2T and FP43T) with extended conjugation have been successfully synthesized. Due to their long fused D-A (D: donor and A: acceptor) molecular structures, PDI-based heteroacenes have rigid backbones and exhibit strong light absorption in the 300-600 nm range. With the contribution from the PDI moiety with strong electron affinity, the molecules possess low energy levels of LUMOs (ca. -3.7 eV), fitting well as acceptors for fullerene-free organic solar cells (OSCs). OSC devices containing FP4TT2T and FP43T were fabricated and fully characterized. It is found that the geometric twist in PDI-based heteroacenes as acceptors could enhance the performance of OSC devices. OSCs based on FP43T with a more twisted geometry achieved a power conversion efficiency of 6.05%, which is higher than those based on the FP4TT2T counterpart.
- Chen, Huaqing,Wang, Ling,Sun, Hua,Liu, Qian,Tan, Xiao,Sang, Shenglong,Wu, Bo,Zhang, Cong,Chen, Fei,Hang, Xiao-Chun,Chen, Zhi-Kuan
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supporting information
p. 13093 - 13099
(2020/11/03)
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- Swallow-tailed perylene derivative: A new tool for fluorescent imaging of lipid hydroperoxides
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A swallow-tailed perylene derivative including a triphenylphosphine moiety was synthesized and applied to the detection and the live-cell imaging of lipid hydroperoxides. The novel probe, named Spy-LHP, reacted rapidly and quantitatively with lipid hydroperoxides to form the corresponding oxide, Spy-LHPOx, which emits extremely strong fluorescence (Φ ~ 1) in the visible range (λem = 535 nm, 574 nm). Spy-LHP was highly selective for lipid hydroperoxides, and the addition of other reactive oxygen species (ROS) including hydrogen peroxides, hydroxyl radical, superoxide anion, nitric oxide, peroxynitrite, and alkylperoxyl radical, caused no significant increase in the fluorescence intensity. The probe exhibited good localization to cellular membranes and was successfully applied to the confocal laser scanning microscopy (CLSM) imaging of lipid hydroperoxides in live J774A.1 cells, in which lipid peroxidation was proceeded by the stimulation of 2,2-azobis(2-amidinopropane)dihydrochloride (AAPH). These findings establish Spy-LHP as a promising new tool for investigating the physiology of lipid hydroperoxides. The Royal Society of Chemistry 2007.
- Soh, Nobuaki,Ariyoshi, Tomoyuki,Fukaminato, Tuyoshi,Nakajima, Hizuru,Nakano, Koji,Imato, Toshihiko
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p. 3762 - 3768
(2008/10/09)
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