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Magnetic Properties of a Single‐Molecule Lanthanide–Transition‐Metal Compound Containing 52 Gadolinium and 56 Nickel Atoms
Author(s) -
Liu DaPeng,
Lin XinPing,
Zhang Hui,
Zheng XiuYing,
Zhuang GuiLin,
Kong XiangJian,
Long LaSheng,
Zheng LanSun
Publication year - 2016
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201601199
Subject(s) - lanthanide , transition metal , chemistry , gadolinium , dispersity , analytical chemistry (journal) , molecule , nickel , crystallography , nuclear chemistry , materials science , catalysis , polymer chemistry , ion , organic chemistry
Monodisperse metal clusters provide a unique platform for investigating magnetic exchange within molecular magnets. Herein, the core–shell structure of the monodisperse molecule magnet of [Gd 52 Ni 56 (IDA) 48 (OH) 154 (H 2 O) 38 ]@SiO 2 ( 1 a @SiO 2 ) was prepared by encapsulating one high‐nuclearity lanthanide–transition‐metal compound of [Gd 52 Ni 56 (IDA) 48 (OH) 154 (H 2 O) 38 ]⋅(NO 3 ) 18 ⋅164 H 2 O ( 1 ) (IDA=iminodiacetate) into one silica nanosphere through a facile one‐pot microemulsion method. 1 a @SiO 2 was characterized using transmission electron microscopy, N 2 adsorption–desorption isotherms, and inductively coupled plasma‐atomic emission spectrometry. Magnetic investigation of 1 and 1 a revealed J 1 =0.25 cm −1 , J 2 =−0.060 cm −1 , J 3 =−0.22 cm −1 , J 4 =−8.63 cm −1 , g= 1.95, and z J =−2.0×10 −3 cm −1 for 1 , and J 1 =0.26 cm −1 , J 2 =−0.065 cm −1 , J 3 =−0.23 cm −1 , J 4 =−8.40 cm −1 g= 1.99, and z J =0.000 cm −1 for 1 a @SiO 2 . The z J =0 in 1 a @SiO 2 suggests that weak antiferromagnetic coupling between the compounds is shielded by silica nanospheres.