Coordination Chemistry of Imidazolium-Carboxylate Ligand
Date Issued
2014
Date
2014
Author(s)
Hu, Chung-Hao
Abstract
Since the publication of the first N-heterocyclic carbene (NHC) by Ardruengo’s group in 1991, NHCs have been widely used in several fields. Due to their electron donating ability and good stability, NHC containing organometallic catalysts generally possess superb catalytic performances. Recently, poly-dentate NHC ligands have drawn much attention for their potential application in organometallic supramolecules. To contribute to the poly-NHC field, we have synthesized a bifuctional ligand, which contains a carboxylate moiety and an imidazolium unit to serve as the metal coordination site and the carbene precursor, respectively. When the bifuctional ligand coordinates to the oxophilic metal centers, multikis imidazolium salts, which could function as bridging ligands for framework materials, are expected. To this end, we successfully synthesized a Co(II) linked bis-imidazolium salt and a Zn(II) connected tetrakis-imidazolium salt. Furthermore, a Cu(II) linked tetra-imidazolinethione complex, and a Cu(II) based tetradentate ligand, which was oxidized to form an imidazolidinone coordinated extended structure, were also synthesized.
Subjects
氮異環碳烯
金屬有機網狀聚合物
超分子化合物
Type
thesis
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