title: Freezing of ring-puckering molecular motion and giant dielectric anomalies in metal-organic perovskites.
abstract: Pucker up! Metal-organic perovskites containing azetidinium cations, [(CH(2))(3)NH(2)][M(HCOO)(3)] (M = Mn, Cu, Zn), all show a structural phase transition, coupled with the freezing of the ring-puckering molecular motion of azetidinium cations, and an extremely large dielectric anomaly near room temperature. Molecular dynamics simulations showed the freezing of ring-puckering motion of the four-membered-ring azetidinium cation near room temperature.
authors.affiliation: Department of Chemistry, College of Humanities and Sciences, Nihon University, Sakurajosui, Sekagaya-ku, Tokyo 156-8550, Japan.
authors.forename: Yuji
authors.initials: Y
authors.lastname: Imai
authors.forename: Biao
authors.initials: B
authors.lastname: Zhou
authors.forename: Yoshiharu
authors.initials: Y
authors.lastname: Ito
authors.forename: Hiroki
authors.initials: H
authors.lastname: Fijimori
authors.forename: Akiko
authors.initials: A
authors.lastname: Kobayashi
authors.forename: Zhe-Ming
authors.initials: ZM
authors.lastname: Wang
authors.forename: Hayao
authors.initials: H
authors.lastname: Kobayashi