The influence of ClO4- and PF6- anions and the steric hindrance of flexible bis-imidazole ligands on the formation and structures of iron(II) coordination polymers

被引：10

作者：

Beheshti, Azizolla ^{[1
]}

Ialegani, Arash ^{[1
]}

Bruno, Giuseppe ^{[2
]}

Rudbari, Hadi Amiri ^{[3
]}

机构：

[1] Shahid Chamran Univ Ahvaz, Dept Chem, Fac Sci, Ahvaz, Iran

[2] Univ Messina, Dipartimento Chim Inorgan, I-98166 Messina, Italy

[3] Univ Isfahan, Fac Chem, Esfahan 8174673441, Iran

来源：

POLYHEDRON | 2014年 / 68卷

关键词：

Metal-organic framework; Iron(II) complexes; Coordination polymers; Imidazole based ligands; METAL-ORGANIC FRAMEWORKS; ONE-DIMENSIONAL CHAIN; CRYSTAL-STRUCTURE; PHOTOLUMINESCENT PROPERTIES; GAS-ADSORPTION; BIS(IMIDAZOLE); NETWORKS; IONS; PYRAZOLE; 1D;

D O I：

10.1016/j.poly.2013.11.010

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Treatments of the flexible 1,4-bis(imidazolyl)butane (bib) ligand with Fe(II) salts in a mixture of ethanol and water (1:1) as a solvent at room temperature resulted in the formation of two novel coordination polymers, {[Fe(bib)(3)](ClO4)(2)}(n) (1) and {[Fe(bib)(3)](RE6)(2)} (2), with two distinctly different network structures due to the variation of the ClO4- and PF6- moieties in these compounds. Their infrared spectra, X-ray powder diffraction (XRPD), elemental and thermal analyses were also investigated in detail. The results of the X-ray analyses demonstrate that in these structures, the iron(II) ion lies on an inversion center and adopts an FeN6 octahedral geometry. Each mu(2)-bib serves as a bridging ligand connecting two adjacent iron(II) ions. In the structure of 1, six mu(2)-bib ligands are simultaneously coordinated to one central iron(II) ion to form an open 3D 2-fold interpenetrating framework with an alpha-polonium (pcu) topology, while 2 has an open 3D network with an acs [point symbol (4(9).6(6))] structure. The structure of [bib(me)H](PF6) [bib(me) = 1,4-bis(2-methylimidazolyl)butane] (3) has also been studied by X-ray crystallography as an unexpected product in an attempt to synthesize the {[Fe(bib(me))(3)](2+)}(n) cation with the PF6- anion. (C) 2013 Elsevier Ltd. All rights reserved.

引用

页码：372 / 378

页数：7

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