Chiroselective Assembly of a Chiral Porphyrin-Fullerene Dyad: Photoconductive Nanofiber with a Top-Class Ambipolar Charge-Carrier Mobility

被引:113
作者
Hizume, Yumi [2 ]
Tashiro, Kentaro [1 ]
Charvet, Richard [1 ]
Yamamoto, Yohei [3 ]
Saeki, Akinori [4 ]
Seki, Shu [4 ]
Aida, Takuzo [2 ,3 ]
机构
[1] Natl Inst Mat Sci, Tsukuba, Ibaraki 3050044, Japan
[2] Univ Tokyo, Sch Engn, Bunkyo Ku, Tokyo 1138656, Japan
[3] Japan Sci & Technol Agcy, Natl Museum Engn Sci & Innovat, ERATO SORST Nanospace Project, Koto Ku, Tokyo 1350064, Japan
[4] Osaka Univ, Dept Appl Chem, Osaka 5650871, Japan
关键词
AMPHIPHILIC MOLECULAR DESIGN; COAXIAL NANOTUBES; ELECTRON-DONOR; HETEROJUNCTIONS; ARCHITECTURES; TRANSPORT;
D O I
10.1021/ja1014713
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Upon slow admission of MeOH, the enantiomerically pure form of chiral amphiphilic porphyrin-fullerene dyad 1 in CH(2)Cl(2) self-assembles at 25 degrees C into nanofibers with a built-in donor/acceptor heterojunction, while its racemic form, under identical conditions, self-assembles into submicrometer-sized spheres with a donor/acceptor arrangement essentially different from that in the nanofiber assembly. Although a cast film of the latter hardly shows a photoconducting profile on micrometer-gap electrodes, the former sample clearly displays photoconduction with an ambipolar charge-transporting character. The electron and hole mobilities under zero electric field, as estimated from time-of-flight profiles, are 0.14 and 0.10 cm(2) V(-1) s(-1), respectively, which are comparable to or even better than those reported for top-class organic materials with a donor/acceptor heterojunction.
引用
收藏
页码:6628 / +
页数:4
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