TY - JOUR
T1 - Tetranuclear Dysprosium(III) Quintuple-Decker Single-Molecule Magnet Prepared Using a π-Extended Phthalocyaninato Ligand with Two Coordination Sites
AU - Katoh, Keiichi
AU - Morita, Takaumi
AU - Yasuda, Nobuhiro
AU - Wernsdorfer, Wolfgang
AU - Kitagawa, Yasutaka
AU - Breedlove, Brian K.
AU - Yamashita, Masahiro
N1 - Funding Information:
This work was partially supported by a Grant-in-Aid for Scientific Research (C) (grant no. 15K05467), Grant-in-Aid for Young Scientists (B) (grant no. 24750119), Grant-in-Aid for Scientific Research (S) (grant no. 20225003) from the Ministry of Education, Culture, Sports, Science, Technology, Japan (MEXT), CREST (JPMJCR12L3) from JST, a Grant-in-aid for JSPS fellows from the Japan Society for the Promotion of Science (JSPS) (25·2441), and Tohoku University Division for International Advanced Research and Education (DIARE). M.Y. thanks the support from the 111 Project (B18030) from China. The synchrotron radiation experiments were performed in the BL40XU beamline of SPring-8 with the approval of the Japan Synchrotron Radiation Research Institute (JASRI, Proposal No. 2015A1620).
Publisher Copyright:
© 2018 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
PY - 2018/10/17
Y1 - 2018/10/17
N2 - The magnetic properties and spin relaxation processes of a tetranuclear dysprosium(III) fused phthalocyaninato (Pc4−) quintuple-decker single-molecule magnet (SMM) (1) with non-equivalent octa-coordination geometries are reported. The structure of 1 is regarded as a dimer of Dy3+-Pc triple-decker SMMs with different magnetic relaxation characteristics, corresponding to the octa-coordination geometry sites Dy1 with C4 symmetry (ϕ1=23°) and Dy2 with D4d symmetry (ϕ2=45°). In an Hdc of 1750 Oe and T range of 1.8–3.75 K, the quantum tunnelling of the magnetization was suppressed, and the direct process was enhanced. The effects of the coordination geometry on the spin relaxation phenomena are examined.
AB - The magnetic properties and spin relaxation processes of a tetranuclear dysprosium(III) fused phthalocyaninato (Pc4−) quintuple-decker single-molecule magnet (SMM) (1) with non-equivalent octa-coordination geometries are reported. The structure of 1 is regarded as a dimer of Dy3+-Pc triple-decker SMMs with different magnetic relaxation characteristics, corresponding to the octa-coordination geometry sites Dy1 with C4 symmetry (ϕ1=23°) and Dy2 with D4d symmetry (ϕ2=45°). In an Hdc of 1750 Oe and T range of 1.8–3.75 K, the quantum tunnelling of the magnetization was suppressed, and the direct process was enhanced. The effects of the coordination geometry on the spin relaxation phenomena are examined.
KW - coordination geometry
KW - dysprosium
KW - quintuple-decker complex
KW - single-molecule magnet
KW - spin relaxation phenomenon
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U2 - 10.1002/chem.201804100
DO - 10.1002/chem.201804100
M3 - Article
C2 - 30182501
AN - SCOPUS:85053680860
SN - 0947-6539
VL - 24
SP - 15522
EP - 15528
JO - Chemistry - A European Journal
JF - Chemistry - A European Journal
IS - 58
ER -