A New Class of Task-Specific Imidazolium Salts and Ionic Liquids and Their Corresponding Transition-Metal Complexes for Immobilization on Electrochemically Active Surfaces

被引：5

作者：

Seidl, Vera ^{[1
]}

Romero, Angel H. ^{[1
,5
]}

Heinemann, Frank W. ^{[1
]}

Scheurer, Andreas ^{[1
]}

Vogel, Carola S. ^{[2
]}

Unruh, Tobias ^{[2
]}

Wasserscheid, Peter ^{[3
,4
]}

Meyer, Karsten ^{[1
]}

机构：

[1] Friedrich Alexander Univ Erlangen Nurnberg FAU, Dept Chem & Pharm, Anorgan Chem, Egerlandstr 1, D-91058 Erlangen, Germany

[2] Friedrich Alexander Univ Erlangen Nurnberg FAU, Dept Phys, Inst Phys Kondensierten Mat, Staudtstr 3, D-91058 Erlangen, Germany

[3] Friedrich Alexander Univ Erlangen Nurnberg FAU, Dept Chemie & Bioingn, Egerlandstr 3, D-91058 Erlangen, Germany

[4] Forschungszentrum Julich, Helmholtz Inst Erlangen Nurnberg Renewable Energy, Egerlandstr 3, D-91058 Nurnberg, Germany

[5] Univ Republica, Fac Ciencias, Inst Quim Biol, Grp Quim Organ Med, Montevideo 11400, Uruguay

来源：

CHEMISTRY-A EUROPEAN JOURNAL | 2022年 / 28卷 / 20期

关键词：

carbene ligands; electronic structure; ionic liquids; solid-state structure; thermal properties; N-HETEROCYCLIC CARBENE; MAGNETIC CIRCULAR-DICHROISM; DENSITY-FUNCTIONAL THEORY; CATION-ANION INTERACTIONS; ELECTRONIC-STRUCTURE; CRYSTAL-STRUCTURE; X-RAY; REACTIVITY; ARYL; ELECTROLYTES;

D O I：

10.1002/chem.202200100

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Adding to the versatile class of ionic liquids, we report the detailed structure and property analysis of a new class of asymmetrically substituted imidazolium salts, offering interesting thermal characteristics, such as liquid crystalline behavior, polymorphism or glass transitions. A scalable general synthetic procedure for N-polyaryl-N'-alkyl-functionalized imidazolium salts with para-substituted linker (L) moieties at the aryl chain, namely [LPh(m)Im(H)R](+) (L = Br, CN, SMe, CO2Et, OH; m = 2, 3; R = C-12, PEG(n); n = 2, 3, 4), was developed. These imidazolium salts were studied by single-crystal X-ray diffraction (SC-XRD), NMR spectroscopy and thermochemical methods (DSC, TGA). Furthermore, these imidazolium salts were used as N-heterocyclic carbene (NHC) ligand precursors for mononuclear, first-row transition metal complexes (Mn-II, Fe-II, Co-II, Ni-II, Zn-II, Cu-I, Ag-I, Au-I) and for the dinuclear Ti-supported Fe-NHC complex [(OPy)(2)Ti(OPh(2)ImC(12))(2)(FeI2)] (OPy = pyridin-2-ylmethanolate). The complexes were studied concerning their structural and magnetic behavior via multinuclear NMR spectroscopy, SC-XRD analyses, variable temperature and field-dependent (VT-VF) SQUID magnetization methods, X-band EPR spectroscopy and, where appropriate, zero-field Fe-57 Mossbauer spectroscopy.

引用

页数：13