title: Extended germa[N]pericyclynes: synthesis and characterization.
abstract: We herein describe the syntheses and characterization of extended germa[N]pericyclynes, which are macrocycles composed of germanium-butadiyne units. The obtained novel extended germa[4]-[8]pericyclynes were characterized by X-ray crystallography, UV-Vis spectroscopy, fluorescence and phosphorescence emission spectroscopy, and cyclic voltammetry, and exhibited characteristic absorptions and emissions. Density functional theory (DFT) calculations suggested smaller HOMO-LUMO gap energy compared to that of general germapericyclynes.
authors.affiliation: Graduate School of Materials Science, Nara Institute of Science and Technology (NAIST), 8916-5 Takayamacho, Ikoma, Nara 630-0192, Japan. tanimoto@ms.naist.jp kakiuchi@ms.naist.jp.
authors.forename: Hiroki
authors.identifier: http://orcid.org/0000-0002-4121-6807
authors.initials: H
authors.lastname: Tanimoto
authors.affiliation: Graduate School of Materials Science, Nara Institute of Science and Technology (NAIST), 8916-5 Takayamacho, Ikoma, Nara 630-0192, Japan. tanimoto@ms.naist.jp kakiuchi@ms.naist.jp.
authors.forename: Taro
authors.initials: T
authors.lastname: Fujiwara
authors.affiliation: Graduate School of Materials Science, Nara Institute of Science and Technology (NAIST), 8916-5 Takayamacho, Ikoma, Nara 630-0192, Japan. tanimoto@ms.naist.jp kakiuchi@ms.naist.jp.
authors.forename: Junta
authors.initials: J
authors.lastname: Mori
authors.affiliation: Graduate School of Materials Science, Nara Institute of Science and Technology (NAIST), 8916-5 Takayamacho, Ikoma, Nara 630-0192, Japan. tanimoto@ms.naist.jp kakiuchi@ms.naist.jp.
authors.forename: Tomohiko
authors.initials: T
authors.lastname: Nagao
authors.affiliation: Graduate School of Materials Science, Nara Institute of Science and Technology (NAIST), 8916-5 Takayamacho, Ikoma, Nara 630-0192, Japan. tanimoto@ms.naist.jp kakiuchi@ms.naist.jp.
authors.forename: Yasuhiro
authors.initials: Y
authors.lastname: Nishiyama
authors.affiliation: Graduate School of Materials Science, Nara Institute of Science and Technology (NAIST), 8916-5 Takayamacho, Ikoma, Nara 630-0192, Japan. tanimoto@ms.naist.jp kakiuchi@ms.naist.jp.
authors.forename: Tsumoru
authors.initials: T
authors.lastname: Morimoto
authors.affiliation: Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan. kazuo123@chujo.synchem.kyoto-u.ac.jp chujo@chujo.synchem.kyoto-u.ac.jp.
authors.forename: Shunichiro
authors.initials: S
authors.lastname: Ito
authors.affiliation: Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan. kazuo123@chujo.synchem.kyoto-u.ac.jp chujo@chujo.synchem.kyoto-u.ac.jp.
authors.forename: Kazuo
authors.identifier: http://orcid.org/0000-0001-6571-7086
authors.initials: K
authors.lastname: Tanaka
authors.affiliation: Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan. kazuo123@chujo.synchem.kyoto-u.ac.jp chujo@chujo.synchem.kyoto-u.ac.jp.
authors.forename: Yoshiki
authors.initials: Y
authors.lastname: Chujo
authors.affiliation: Graduate School of Materials Science, Nara Institute of Science and Technology (NAIST), 8916-5 Takayamacho, Ikoma, Nara 630-0192, Japan. tanimoto@ms.naist.jp kakiuchi@ms.naist.jp.
authors.forename: Kiyomi
authors.initials: K
authors.lastname: Kakiuchi