Template-Controlled Synthesis of Polyimidazolium Salts by Multiple [2+2] Cycloaddition Reactions

被引：6

作者：

Dobbe, Christian B. ^{[1
]}

Gutierrez-Blanco, Ana ^{[1
,2
]}

Tan, Tristan T. Y. ^{[1
]}

Hepp, Alexander ^{[1
]}

Poyatos, Macarena ^{[2
]}

Peris, Eduardo ^{[2
]}

Ekkehardt Hahn, F. ^{[1
]}

机构：

[1] Westfalische Wilhelms Univ Munster, Inst Anorgan & Analyt Chem, Corrensstr 30, D-48149 Munster, Germany

[2] Univ Jaume 1, Inst Adv Mat INAM, Avda Vicente Sos Baynat S-N, Castellon de La Plana 12071, Spain

来源：

CHEMISTRY-A EUROPEAN JOURNAL | 2020年 / 26卷 / 50期

关键词：

anion recognition; N-heterocyclic carbene; polyimidazolium salts; postsynthetic photochemical modification; silver complexes; DICARBENE-DERIVED METALLACYCLES; METAL-ORGANIC FRAMEWORKS; ANION-BINDING; COOPERATIVITY; RECEPTORS; LIGANDS; DESIGN; DRIVEN;

D O I：

10.1002/chem.202001515

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The tetrakisimidazolium salt H-4-2(Br)(4), featuring a central benzene linker and 1,2,4,5-(nBu-imidazolium-Ph-CH=CH-) substituents reacts with Ag2O in the presence of AgBF(4)to yield the tetranuclear, oktakis-NHC assembly [3](BF4)(4). Cation [3](4+)features four pairs of olefins from the two tetrakis-NHC ligands perfectly arranged for a subsequent [2+2] cycloaddition. Irradiation of [3](BF4)(4)with a high pressure Hg lamp connects the two tetra-NHC ligands through four cyclobutane linkers to give compound [4](BF4)(4). Removal of the template metals yields the novel oktakisimidazolium salt H-8-5(BF4)(8). The tetrakisimidazolium salt H-4-2(BF4)(4)and the oktakisimidazolium salt H-8-5(BF4)(8)have been used as multivalent anion receptors and their anion binding properties towards six different anions have been compared.

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页码：11565 / 11570

页数：6

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