Department of Materials Science and Engineering and ‡Department of Chemistry, University of Washington , Seattle, Washington 98195, United States.
J Am Chem Soc. 2015 Feb 18;137(6):2167-70. doi: 10.1021/ja511415n. Epub 2015 Feb 3.
Supramolecular arrangement of conjugated molecules has crucial influence on their material properties. For fullerenes and metallofullerenes, tight and ordered packing is beneficial for intermolecular charge transport and energy transfer, but it is tricky to achieve, especially for functionalized cages due to the often extensive solvation and steric effects of functional groups. In this study, we use an amphiphilic fullerene derivative soluble in methanol to form co-assemblies with insoluble fullerene derivatives, pristine fullerene, and metallofullerene via strong π-π interactions. These mixtures are processable in methanol and show fullerene-templated crystalline structures in spin-cast films. Devices are successfully fabricated on a field-effect transistor platform with this approach, and all co-assemblies show metallic-like conductive properties with significantly enhanced conductivity compared to the pure amphiphilic fullerene derivative.
共轭分子的超分子排列对其材料性质有至关重要的影响。对于富勒烯和金属富勒烯，紧密有序的堆积有利于分子间的电荷传输和能量转移，但由于官能团的广泛溶剂化和空间位阻效应，这很难实现，特别是对于功能化的笼状结构。在这项研究中，我们使用一种在甲醇中可溶的两亲性富勒烯衍生物，通过强π-π相互作用与不溶性富勒烯衍生物、原始富勒烯和金属富勒烯形成共组装体。这些混合物在甲醇中可加工，并在旋涂薄膜中显示出富勒烯模板的结晶结构。通过这种方法，我们成功地在场效应晶体管平台上制造了器件，所有共组装体都表现出类似于金属的导电特性，与纯两亲性富勒烯衍生物相比，导电性显著增强。
