Alkylamine-Templated
Niccolite Frameworks of [Ga<sup>III</sup>M<sup>II</sup>(HCOO)<sub>6</sub>]<sup>−</sup> (M
= Fe, Ni): Structure, Magnetism, and Dielectricity
Kai Wang
Jian-Bo Xiong
Bin Xia
Qing-Lun Wang
Yu-Zhang Tong
Yue Ma
Zhe-Ming Wang
Song Gao
10.1021/acs.inorgchem.8b00124.s001
https://acs.figshare.com/articles/journal_contribution/Alkylamine-Templated_Niccolite_Frameworks_of_Ga_sup_III_sup_M_sup_II_sup_HCOO_sub_6_sub_sup_sup_M_Fe_Ni_Structure_Magnetism_and_Dielectricity/5973031
The
five heterometallic formate frameworks [EtA][Ga<sup>III</sup>Fe<sup>II</sup>(HCOO)<sub>6</sub>] (<b>1</b>; EtA = CH<sub>3</sub>CH<sub>2</sub>NH<sub>3</sub><sup>+</sup>), [DMA][Ga<sup>III</sup>Fe<sup>II</sup>(HCOO)<sub>6</sub>] (<b>2</b>; DMA = (CH<sub>3</sub>)<sub>2</sub>NH<sub>2</sub><sup>+</sup>), [DEtA][Ga<sup>III</sup>Fe<sup>II</sup>(HCOO)<sub>6</sub>] (<b>3</b>; DEtA = (CH<sub>3</sub>CH<sub>2</sub>)<sub>2</sub>NH<sub>2</sub><sup>+</sup>), [MA][Ga<sup>III</sup>Ni<sup>II</sup>(HCOO)<sub>6</sub>] (<b>4</b>; MA =
CH<sub>3</sub>NH<sub>3</sub><sup>+</sup>), and [DMA][Ga<sup>III</sup>Ni<sup>II</sup>(HCOO)<sub>6</sub>] (<b>5</b>) were synthesized
through solvothermal methods. Complexes <b>1</b>–<b>5</b> are isotructural, and all crystallize in the trigonal <i>P</i>3̅<sub>1</sub><i>c</i> space group. Each
metal center is 6-connected, with each HCOO<sup>–</sup> bridging
ligand in an anti-anti mode to build a three-dimensional niccolite-like
architecture. All of the complexes exhibit weak ferromagnetism at
low temperature. A variable-temperature (VT) dielectric study indicates
that the dielectric anomaly is induced by the freezing of motions
from the protonated amines during the freezing process.
2018-03-12 17:17:50
2 NH 2
dielectric study
Alkylamine-Templated Niccolite Frameworks
DMA
protonated amines
MA
CH 3 NH 3
niccolite-like architecture
complexes exhibit
CH 3
solvothermal methods
Fe
anti-anti mode
dielectric anomaly
CH 3 CH 2 NH 3
Ga III M II
VT
heterometallic formate frameworks
HCOO
CH 3 CH 2
metal center