title: Influence of Guest Exchange on the Magnetization Dynamics of Dilanthanide Single-Molecule-Magnet Nodes within a Metal-Organic Framework.
abstract: Multitopic organic linkers can provide a means to organize metal cluster nodes in a regular three-dimensional array. Herein, we show that isonicotinic acid N-oxide (HINO) serves as the linker in the formation of a metal-organic framework featuring Dy2 single-molecule magnets as nodes. Importantly, guest solvent exchange induces a reversible single-crystal to single-crystal transformation between the phases Dy2(INO)4(NO3)2⋅2 solvent (solvent=DMF (Dy2-DMF), CH3CN (Dy2-CH3CN)), thereby switching the effective magnetic relaxation barrier (determined by ac magnetic susceptibility measurements) between a negligible value for Dy2-DMF and 76 cm(-1) for Dy2-CH3CN. Ab initio calculations indicate that this difference arises not from a significant change in the intrinsic relaxation barrier of the Dy2 nodes, but rather from a slowing of the relaxation rate of incoherent quantum tunneling of the magnetization by two orders of magnitude.
authors.affiliation: Department of Chemistry, Key Laboratory of Advanced Energy Materials Chemistry (MOE), State Key Laboratory of Elemento-Organic Chemistry, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Nankai University, Tianjin 300071 (P. R. China).
authors.forename: Xuejing
authors.initials: X
authors.lastname: Zhang
authors.affiliation: Theory of Nanomaterials Group and INPAC-Institute of Nanoscale Physics and Chemistry, Katholieke Universiteit Leuven, Celestijnenlaan 200F, 3001 Heverlee (Belgium).
authors.forename: Veacheslav
authors.initials: V
authors.lastname: Vieru
authors.affiliation: Department of Chemistry, University of California, Berkeley, Berkeley, CA 94720 (USA).
authors.forename: Xiaowen
authors.initials: X
authors.lastname: Feng
authors.affiliation: Department of Chemistry, University of California, Berkeley, Berkeley, CA 94720 (USA).
authors.forename: Jun-Liang
authors.initials: JL
authors.lastname: Liu
authors.affiliation: Department of Chemistry, Key Laboratory of Advanced Energy Materials Chemistry (MOE), State Key Laboratory of Elemento-Organic Chemistry, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Nankai University, Tianjin 300071 (P. R. China).
authors.forename: Zhenjie
authors.initials: Z
authors.lastname: Zhang
authors.affiliation: Department of Chemistry, Key Laboratory of Advanced Energy Materials Chemistry (MOE), State Key Laboratory of Elemento-Organic Chemistry, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Nankai University, Tianjin 300071 (P. R. China).
authors.forename: Bo
authors.initials: B
authors.lastname: Na
authors.affiliation: Department of Chemistry, Key Laboratory of Advanced Energy Materials Chemistry (MOE), State Key Laboratory of Elemento-Organic Chemistry, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Nankai University, Tianjin 300071 (P. R. China). shiwei@nankai.edu.cn.
authors.forename: Wei
authors.initials: W
authors.lastname: Shi
authors.affiliation: Beijing National Laboratory of Molecular Science, State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871 (P. R. China).
authors.forename: Bing-Wu
authors.initials: BW
authors.lastname: Wang
authors.affiliation: Institute of Inorganic Chemistry, Karlsruhe Institute of Technology, Engesserstrasse 15, 76131 Karlsruhe (Germany).
authors.forename: Annie K
authors.initials: AK
authors.lastname: Powell
authors.affiliation: Theory of Nanomaterials Group and INPAC-Institute of Nanoscale Physics and Chemistry, Katholieke Universiteit Leuven, Celestijnenlaan 200F, 3001 Heverlee (Belgium). Liviu.Chibotaru@chem.kuleuven.be.
authors.forename: Liviu F
authors.initials: LF
authors.lastname: Chibotaru
authors.affiliation: Beijing National Laboratory of Molecular Science, State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871 (P. R. China). gaosong@pku.edu.cn.
authors.forename: Song
authors.initials: S
authors.lastname: Gao
authors.affiliation: Department of Chemistry, Key Laboratory of Advanced Energy Materials Chemistry (MOE), State Key Laboratory of Elemento-Organic Chemistry, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Nankai University, Tianjin 300071 (P. R. China).
authors.forename: Peng
authors.initials: P
authors.lastname: Cheng
authors.affiliation: Department of Chemistry, University of California, Berkeley, Berkeley, CA 94720 (USA). jrlong@berkeley.edu.
authors.forename: Jeffrey R
authors.initials: JR
authors.lastname: Long
keywords: ab initio calculations; host-guest systems; lanthanides; metal-organic frameworks; single-molecule magnets