title: Cyclobuteno[60]fullerenes as Efficient n-Type Organic Semiconductors.
abstract: Cyclobuteno[3,4:1,2][60]fullerenes have been prepared in a straightforward manner by a simple reaction between [60]fullerene and readily available allenoates or alkynoates as organic reagents under basic and mild conditions. The chemical structure of the new modified fullerenes has been determined by standard spectroscopic techniques and confirmed by X-ray diffraction analysis. Some of these new fullerene derivatives exhibit a remarkable intrinsic electron mobility (determined by using flash-photolysis time-resolved microwave conductivity (FP-TRMC) measurements), which surpasses that of the well-known phenyl-C61-butyric acid methyl ester, thus behaving as promising n-type organic semiconductors.
authors.affiliation: Universidad Complutense de Madrid, Av. Complutense S/N, 28040, Madrid, Spain.
authors.forename: Silvia
authors.initials: S
authors.lastname: Reboredo
authors.affiliation: Universidad Complutense de Madrid, Av. Complutense S/N, 28040, Madrid, Spain.
authors.forename: Rosa M
authors.initials: RM
authors.lastname: Girón
authors.affiliation: Universidad Complutense de Madrid, Av. Complutense S/N, 28040, Madrid, Spain.
authors.forename: Salvatore
authors.initials: S
authors.lastname: Filippone
authors.affiliation: Department of Molecular Engineering, Kyoto University, Nishikyo-ku, 615-8510, Kyoto, Japan.
authors.forename: Tsubasa
authors.initials: T
authors.lastname: Mikie
authors.affiliation: Department of Molecular Engineering, Kyoto University, Nishikyo-ku, 615-8510, Kyoto, Japan.
authors.forename: Tsuneaki
authors.initials: T
authors.lastname: Sakurai
authors.affiliation: Department of Molecular Engineering, Kyoto University, Nishikyo-ku, 615-8510, Kyoto, Japan.
authors.forename: Shu
authors.initials: S
authors.lastname: Seki
authors.affiliation: Universidad Complutense de Madrid, Av. Complutense S/N, 28040, Madrid, Spain. nazmar@ucm.es.|IMDEA-Nanoscience Institute, Campus de Cantoblanco, C/ Faraday, 9, 28049, Madrid, Spain. nazmar@ucm.es.
authors.forename: Nazario
authors.initials: N
authors.lastname: Martín
keywords: alkynoates; allenoates; cyclobutene; electron mobility; fullerenes