ERATO-SORST Nanospace Project, Japan Science and Technology Agency (JST), 2-3-6 Aomi, Koto-ku, Tokyo 135-0064, Japan.
J Am Chem Soc. 2012 Feb 8;134(5):2524-7. doi: 10.1021/ja211334k. Epub 2012 Jan 27.
Amphiphilic zinc porphyrin (P(Zn); electron donor, D)-fullerene (C(60); electron acceptor, A) dyads 2 and 3, bearing an identical hydrophilic wedge with triethylene glycol chains but different linkers between the P(Zn) and C(60) units, self-assemble into nanotubes with essentially different dimensional and geometrical features from one another. The nanotube from dyad 2 with an ester linker consists of a bilayer wall formed with coaxially segregated D and A nanodomains along the tube axis (coaxial D-A heterojunction), thereby displaying explicit photoconductivity with ambipolar carrier transport properties. In contrast, the nanotube from dyad 3 with a rigid arylacetylene linker consists of a monolayer wall with an alternate geometry of D/A stacking, resulting in poor photoconducting outputs. Such a geometrical difference also significantly affects the photovoltaic properties.
两亲性锌卟啉（P(Zn)；电子给体，D）-富勒烯（C(60)；电子受体，A）偶联物 2 和 3，具有相同的亲水楔形三乙二醇链，但 P(Zn)和 C(60)单元之间的连接子不同，自组装成具有截然不同的尺寸和几何特征的纳米管。带有酯键连接子的偶联物 2 形成的纳米管由双层壁组成，壁内同轴隔离的 D 和 A 纳米域沿管轴排列（同轴 D-A 异质结），因此表现出明显的光导电性和双极载流子输运特性。相比之下，带有刚性芳基乙炔连接子的偶联物 3 形成的纳米管具有交替的 D/A 堆积几何形状的单层壁，导致光导输出性能较差。这种几何差异也显著影响光伏性能。
