Crystal structure, photomagnetic and dielectric properties of a cyanido-bridged Cu-Mo assembly film

被引：0
|
作者：
Ikeda, Yusuke [1 ]
Matsumura, Daiju [2 ]
Tsuji, Takuya [2 ]
Namai, Asuka [1 ]
Imoto, Kenta [1 ]
Tokoro, Hiroko [1 ,3 ]
Nakabayashi, Koji [1 ]
Ohkoshi, Shin-ichi [1 ]
机构：
[1] Univ Tokyo, Sch Sci, Dept Chem, 7-3-1 Hongo,Bunkyo Ku, Tokyo 1130033, Japan
[2] Japan Atom Energy Agcy, SPring 8,1-1-1 Kouto, Sayo, Hyogo 6795148, Japan
[3] Univ Tsukuba, Fac Pure & Appl Sci, Div Mat Sci, 1-1-1 Tennodai, Tsukuba, Ibaraki 3058577, Japan
来源：
INORGANICA CHIMICA ACTA | 2023年 / 550卷
关键词：
MAGNETIC-POLE INVERSION; INDUCED REVERSIBLE PHOTOMAGNETISM; HIGH CURIE-TEMPERATURE; PHOTOINDUCED MAGNETIZATION; ORDERING TEMPERATURES; SPIN TRANSITION; COPPER; LIGHT; WATER; OCTACYANOMOLYBDATE;
D O I：
10.1016/j.ica.2023.121434
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
A film of a cyanido-bridged Cu-Mo assembly CuII2[MoIV(CN)8]center dot 8H2O (CuMo-film) was electrochemically synthesized. Unlike analogs with a formula of MII2[MoIV(CN)8]center dot zH2O (M = Mn, Fe, Co), which show tetragonal crystal structures, the CuMo-film shows a monoclinic structure in the C2/m space group with cell parameters of a = 17.2461 angstrom, b = 11.1681 angstrom, c =11.2618 angstrom, beta = 125.1089 degrees, and V = 1774.44 angstrom 3. Extended X-ray absorption fine structure analysis traced the bond distances around the Cu site as 1.93-2.30 angstrom for Cu-N and 2.01-2.40 angstrom for Cu-O. CuMo-film exhibits photo-switchable magnetization with TC = 18 K and dielectric relaxation related to the hydrogen bond network. The change of activation energy (Ea) of the dielectric relaxation around 157 K (from Ea = 49.9 kJ mol-1 to Ea = 27.3 kJ mol-1 on cooling) suggests that the development of the hydrogen bond network occurs below 157 K.
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页数：8
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