A Paramagnetic NMR Spectroscopy Toolbox for the Characterisation of Paramagnetic/Spin-Crossover Coordination Complexes and Metal-Organic Cages

被引：28
|
作者：
Lehr, Marc [1 ]
Paschelke, Tobias [1 ]
Trumpf, Eicke [1 ]
Vogt, Anna-Marlene [1 ]
Naether, Christian [2 ]
Soennichsen, Frank D. [1 ]
McConnell, Anna J. [1 ]
机构：
[1] Christian Albrechts Univ Kiel, Otto Diels Inst Organ Chem, Otto Hahn Pl 4, D-24098 Kiel, Germany
[2] Christian Albrechts Univ Kiel, Inst Inorgan Chem, Max Eyth Str 2, D-24118 Kiel, Germany
来源：
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION | 2020年 / 59卷 / 43期
关键词：
metal-organic cage; NMR spectroscopy; paramagnetic complex; spin-crossover; supramolecular chemistry; HOST-GUEST INTERACTIONS; SPIN-CROSSOVER; COSY SPECTRA; IRON(II); EXCHANGE; BINDING; STATE; CHEMISTRY; COHERENCE; PROTEIN;
D O I：
10.1002/anie.202008439
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The large paramagnetic shifts and short relaxation times resulting from the presence of a paramagnetic centre complicate NMR data acquisition and interpretation in solution. As a result, NMR analysis of paramagnetic complexes is limited in comparison to diamagnetic compounds and often relies on theoretical models. We report a toolbox of 1D (H-1, proton-coupled(13)C, selective(1)H-decoupling(13)C, steady-state NOE) and 2D (COSY, NOESY, HMQC) paramagnetic NMR methods that enables unprecedented structural characterisation and in some cases, provides more structural information than would be observable for a diamagnetic analogue. We demonstrate the toolbox's broad versatility for fields from coordination chemistry and spin-crossover complexes to supramolecular chemistry through the characterisation of Co(II)and high-spin Fe(II)mononuclear complexes as well as a Co(4)L(6)cage.
引用
收藏
页码：19344 / 19351
页数：8
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