title: Enhancing proton conduction in 2D Co-La coordination frameworks by solid-state phase transition.
abstract: We report that a new 2D 3d-4f phosphonate [Co(III)La(III)(notpH)(H2O)6]ClO4·5H2O (CoLa-II) can undergo a phase transition above 45 °C and 93% relative humidity, resulting in [H3O][CoLa(notp)(H2O)4]ClO4·3H2O (CoLa-III). The transition is accompanied by the release of the proton from intralayer to interlayer, and thus the proton conductivity of the material is increased by 1 order of magnitude.
authors.affiliation: State Key Laboratory of Coordination Chemistry, Coordination Chemistry Institute, School of Chemistry and Chemical Engineering, Nanjing University , Nanjing 210093, P. R. China.
authors.forename: Song-Song
authors.initials: SS
authors.lastname: Bao
authors.forename: Kazuya
authors.initials: K
authors.lastname: Otsubo
authors.forename: Jared M
authors.initials: JM
authors.lastname: Taylor
authors.forename: Zheng
authors.initials: Z
authors.lastname: Jiang
authors.forename: Li-Min
authors.initials: LM
authors.lastname: Zheng
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Kitagawa