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

Seidl V, Romero Cordero AH, Heinemann FW, Scheurer A, Vogel C, Unruh T, Wasserscheid P, Meyer K (2022)

Publication Type: Journal article

Publication year: 2022

Journal

DOI: 10.1002/chem.202200100

Abstract

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 [LPhmIm^HR]⁺ (L=Br, CN, SMe, CO2Et, OH; m=2, 3; R=C12, PEGn; 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)2Ti(OPh2ImC12)2(FeI2)] (OPy=pyridin-2-ylmethanolate). The complexes were studied concerning their structural and magnetic behavior via multi-nuclear NMR spectroscopy, SC-XRD analyses, variable temperature and field-dependent (VT-VF) SQUID magnetization methods, X-band EPR spectroscopy and, where appropriate, zero-field ⁵⁷Fe Mössbauer spectroscopy.

Authors with CRIS profile

Vera Seidl Lehrstuhl für Anorganische und Allgemeine Chemie Angel Heriberto Romero Cordero Lehrstuhl für Anorganische und Allgemeine Chemie Frank Wilhelm Heinemann Lehrstuhl für Anorganische und Allgemeine Chemie Andreas Scheurer Lehrstuhl für Anorganische und Allgemeine Chemie Carola Vogel Lehrstuhl für Anorganische und Allgemeine Chemie Tobias Unruh Professur für Nanomaterialcharakterisierung (Streumethoden) Peter Wasserscheid Lehrstuhl für Chemische Reaktionstechnik (CRT) Karsten Meyer Lehrstuhl für Anorganische und Allgemeine Chemie

How to cite

APA:

Seidl, V., Romero Cordero, A.H., Heinemann, F.W., Scheurer, A., Vogel, C., Unruh, T.,... Meyer, K. (2022). A New Class of Task-Specific Imidazolium Salts and Ionic Liquids and Their Corresponding Transition-Metal Complexes for Immobilization on Electrochemically Active Surfaces. Chemistry - A European Journal. https://doi.org/10.1002/chem.202200100

MLA:

Seidl, Vera, et al. "A New Class of Task-Specific Imidazolium Salts and Ionic Liquids and Their Corresponding Transition-Metal Complexes for Immobilization on Electrochemically Active Surfaces." Chemistry - A European Journal (2022).

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