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.

引用

页数：8

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