Synthesis, Structures, and Properties of Four Novel HgII Complexes Based on Pyridine Acylamide Ligands

Xiao-Min Zhang; Xue-Feng Feng; Jian-Qiang Li; Feng Luo

doi:10.1071/CH14110

RESEARCH ARTICLE

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Synthesis, Structures, and Properties of Four Novel Hg^II Complexes Based on Pyridine Acylamide Ligands

Xiao-Min Zhang ^A , Xue-Feng Feng ^A , Jian-Qiang Li ^A and Feng Luo ^A ^B

+ Author Affiliations

- Author Affiliations

^A College of Biology, Chemistry and Material Science, East China Institute of Technology, Nanchang, 330013, Jiangxi, China.

^B Corresponding author. Email: ecitluofeng@163.com

Australian Journal of Chemistry 68(1) 80-85 https://doi.org/10.1071/CH14110
Submitted: 1 March 2014 Accepted: 21 March 2014 Published: 22 April 2014

Abstract

In this work we synthesised four new pyridine acylamide complexes [HgI₂(L1)] (1) and (2), [HgI₂(L2)₂] (3), and [HgI₂(L3)]_n (4) (L1 = N,N′-bis(3-pyridylmethyl)benzene-1,4-dicarboxamide, L2 = N⁴,N⁴′-bis(pyridin-3-yl)-[1,1′-biphenyl]-4,4′-dicarboxamide, L3 = N¹,N³-bis(pyridin-3-ylmethyl)isophthalamide) by solvo(hydro)thermal reaction. Compounds 1 and 2 are supramolecular isomers prepared via variation of the reaction solvent, in which the Hg^II centres are bridged by L1 ligands to form one-dimensional (1D) helical chain or 1D meso-helical chain, respectively. Careful inspection of the structures reveal that formation of the isomers are mainly induced by the distinct configuration of L1 ligand and slight differences in coordination geometry of the Hg^II ions. Complex 3 shows a novel Z-shaped zero-dimensional structure with a L2–HgI₂–L2–HgI₂–L2 arrangement. In complex 4, flexible L3 ligands link HgI₂ units to construct a 1D helical chain with an overall chiral structure, derived from spontaneous resolution. Luminescence properties of these four novel complexes were also explored.

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Synthesis, Structures, and Properties of Four Novel HgII Complexes Based on Pyridine Acylamide Ligands

Abstract

References

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Synthesis, Structures, and Properties of Four Novel Hg^II Complexes Based on Pyridine Acylamide Ligands