Holmium Complex with Phospholipids as 1H NMR Relaxational Sensor of Temperature and Viscosity

Selyutina, Olga Yu.; Babailov, Sergey P.

doi:10.3390/molecules27196691

Cited by 3 publications

(1 citation statement)

References 47 publications

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“…In the presence of a structural model for the system under study (obtained from the X-ray structural analysis data or obtained by quantum-mechanical modeling and other methods), it is possible to use the method for analyzing pseudo-contact contributions to the LIS, based on the optimization procedure [32][33][34][35][36][37][38][39]. At the same time, NMR studies of polynuclear lanthanide complexes are more difficult, since each paramagnetic center contributes to the LIS as well as the increase in the relaxation rate.…”

Section: Introductionmentioning

confidence: 99%

Structure Determination of Binuclear Triple-Decker Phthalocyaninato Complexes by NMR via Paramagnetic Shifts Analysis Using Symmetry Peculiarities

et al. 2022

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The detailed knowledge about the structure of multinuclear paramagnetic lanthanide complexes for the targeted design of these compounds with special magnetic, sensory, optical and electronic properties is a very important task. At the same time, establishing the structure of such multinuclear paramagnetic lanthanide complexes in solution, using NMR is a difficult task, since several paramagnetic centers act simultaneously on the resulting chemical shift of a particular nucleus. In this paper, we have demonstrated the possibility of molecular structure determination in solution on the example of binuclear triple-decker lanthanide(III) complexes with tetra-15-crown-5-phthalocyanine Ln2[(15C5)4Pc]3 {where Ln = Tb (1) and Dy (2)} by quantitative analysis of the pseudo-contact lanthanide-induced shifts (LIS). The symmetry of complexes was used for the simplification of the calculation of pseudo-contact shifts on the base of the expression for the magnetic susceptibility tensor in the arbitrary oriented magnetic axis system. Good agreement between the calculated and experimental shifts in the 1H NMR spectra indicates the similarity of the structure for the complexes 1 and 2 in solution of CDCl3 and the structure in the crystalline phase, found from the data of the X-ray structural study of the similar complex Lu2[(15C5)4Pc]3. The described approach can be useful for LIS analysis of other polynuclear symmetric lanthanide complexes.

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Section: Introductionmentioning

confidence: 99%

Structure Determination of Binuclear Triple-Decker Phthalocyaninato Complexes by NMR via Paramagnetic Shifts Analysis Using Symmetry Peculiarities

et al. 2022

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Nuclear spin relaxation

Kowalewski

2023

Nuclear Magnetic Resonance

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This review covers the progress in the field of NMR relaxation in fluids during 2022. The emphasis is on comparatively simple liquids and solutions of physico-chemical and chemical interest, in analogy with the previous periods, but selected biophysics-related topics (here, I also include some work on relaxation in solid biomaterials) and relaxation-related studies on more complex systems (macromolecular solutions, liquid crystalline systems, glassy and porous materials) are also covered. Section 2 of the chapter is concerned with general, physical and experimental aspects of nuclear spin relaxation, while Section 3 is concentrated on applications.

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Two fluorinated thulium complexes as molecular temperature sensors in MR applications

Mysegaes,

Voigt,

Spiteller

et al. 2023

Chem. Commun.

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Holmium Complex with Phospholipids as 1H NMR Relaxational Sensor of Temperature and Viscosity

Cited by 3 publications

References 47 publications

Structure Determination of Binuclear Triple-Decker Phthalocyaninato Complexes by NMR via Paramagnetic Shifts Analysis Using Symmetry Peculiarities

Structure Determination of Binuclear Triple-Decker Phthalocyaninato Complexes by NMR via Paramagnetic Shifts Analysis Using Symmetry Peculiarities

Nuclear spin relaxation

Two fluorinated thulium complexes as molecular temperature sensors in MR applications

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