scholarly journals Kilohertz electron paramagnetic resonance spectroscopy of single nitrogen centers at zero magnetic field

2020 ◽  
Vol 6 (22) ◽  
pp. eaaz8244
Author(s):  
Fei Kong ◽  
Pengju Zhao ◽  
Pei Yu ◽  
Zhuoyang Qin ◽  
Zhehua Huang ◽  
...  
Keyword(s):  
Electron Paramagnetic Resonance ◽  
Single Molecule ◽  
Epr Spectroscopy ◽  
Electron Paramagnetic Resonance Spectroscopy ◽  
Nitrogen Vacancy ◽  
Zero Magnetic Field ◽  
Resonance Spectroscopy ◽  
Ambient Conditions ◽  
Paramagnetic Resonance ◽  
Electron Paramagnetic

Electron paramagnetic resonance (EPR) spectroscopy is among the most important analytical tools in physics, chemistry, and biology. The emergence of nitrogen-vacancy (NV) centers in diamond, serving as an atomic-sized magnetometer, has promoted this technique to single-spin level, even under ambient conditions. Despite the enormous progress in spatial resolution, the current megahertz spectral resolution is still insufficient to resolve key heterogeneous molecular information. A major challenge is the short coherence times of the sample electron spins. Here, we address this challenge by using a magnetic noise–insensitive transition between states of different symmetry. We demonstrate a 27-fold narrower spectrum of single substitutional nitrogen (P1) centers in diamond with a linewidth of several kilohertz, and then some weak couplings can be resolved. Those results show both spatial and spectral advances of NV center–based EPR and provide a route toward analytical (EPR) spectroscopy at the single-molecule level.

scholarly journals Exploring template-bound dinuclear copper porphyrin nanorings by EPR spectroscopy

2016 ◽  
Vol 7 (12) ◽  
pp. 6952-6960 ◽  
Author(s):  
Sabine Richert ◽  
Jonathan Cremers ◽  
Harry L. Anderson ◽  
Christiane R. Timmel
Keyword(s):  
Electron Paramagnetic Resonance ◽  
Epr Spectroscopy ◽  
Electron Paramagnetic Resonance Spectroscopy ◽  
Molecular Geometry ◽  
Resonance Spectroscopy ◽  
Paramagnetic Resonance ◽  
Copper Porphyrin ◽  
Ligand Interactions ◽  
Electron Paramagnetic ◽  
Metal Ligand

Electron paramagnetic resonance spectroscopy reveals the molecular geometry and metal–ligand interactions in template-bound ten-membered bis-copper porphyrin nanorings.

Delocalized triplet state in porphyrin J-aggregates revealed by EPR spectroscopy

2017 ◽  
Vol 19 (40) ◽  
pp. 27173-27177 ◽  
Author(s):  
Luca Bolzonello ◽  
Marco Albertini ◽  
Elisabetta Collini ◽  
Marilena Di Valentin
Keyword(s):  
Electron Paramagnetic Resonance ◽  
Electronic Structure ◽  
Triplet State ◽  
Epr Spectroscopy ◽  
Electron Paramagnetic Resonance Spectroscopy ◽  
Resonance Spectroscopy ◽  
Paramagnetic Resonance ◽  
Time Resolved ◽  
J Aggregates ◽  
Electron Paramagnetic

In this work, the electronic structure of the triplet state of self-assembled J-aggregates of tetrakis(4-sulfonatophenyl)porphyrin (TPPS) has been characterized by means of time-resolved electron paramagnetic resonance spectroscopy.

scholarly journals Operando electron paramagnetic resonance spectroscopy – formation of mossy lithium on lithium anodes during charge–discharge cycling

2015 ◽  
Vol 8 (4) ◽  
pp. 1358-1367 ◽  
Author(s):  
Johannes Wandt ◽  
Cyril Marino ◽  
Hubert A. Gasteiger ◽  
Peter Jakes ◽  
Rüdiger-A. Eichel ◽  
...  
Keyword(s):  
Electron Paramagnetic Resonance ◽  
Epr Spectroscopy ◽  
Electrochemical Cell ◽  
Electron Paramagnetic Resonance Spectroscopy ◽  
Resonance Spectroscopy ◽  
Cell Design ◽  
Paramagnetic Resonance ◽  
Time Resolved ◽  
Electron Paramagnetic ◽  
Charge Discharge

Time-resolved formation of micro-structured mossy/dendritic lithium is investigated during battery cycling byoperandoEPR spectroscopy, using a novel electrochemical cell design.

scholarly journals In situ electrochemical electron paramagnetic resonance spectroscopy as a tool to probe electrical double layer capacitance

2018 ◽  
Vol 54 (31) ◽  
pp. 3827-3830 ◽  
Author(s):  
Bin Wang ◽  
Alistair J. Fielding ◽  
Robert A. W. Dryfe
Keyword(s):  
Electron Paramagnetic Resonance ◽  
Epr Spectroscopy ◽  
Electrical Double Layer ◽  
Electron Paramagnetic Resonance Spectroscopy ◽  
Resonance Spectroscopy ◽  
Double Layer Capacitance ◽  
Paramagnetic Resonance ◽  
Electron Paramagnetic ◽  
Electrical Double Layer Capacitance

In situ electrochemical electron paramagnetic resonance (EPR) spectroscopy is presented as a means to distinguish between purely capacitive and pseudo-capacitive processes in supercapacitors.

scholarly journals Monitoring enzymatic ATP hydrolysis by EPR spectroscopy

2014 ◽  
Vol 50 (55) ◽  
pp. 7262-7264 ◽  
Author(s):  
Stephan M. Hacker ◽  
Christian Hintze ◽  
Andreas Marx ◽  
Malte Drescher
Keyword(s):  
Electron Paramagnetic Resonance ◽  
Enzymatic Hydrolysis ◽  
Epr Spectroscopy ◽  
Atp Hydrolysis ◽  
Electron Paramagnetic Resonance Spectroscopy ◽  
Resonance Spectroscopy ◽  
Paramagnetic Resonance ◽  
Substrate Analogues ◽  
Electron Paramagnetic ◽  
Hydrolysis Of

Adenosine triphosphate is modified with two nitroxide radicals and employed to demonstrate that electron paramagnetic resonance spectroscopy can be used to study the enzymatic hydrolysis of doubly labelled substrate analogues.

Localization of metal ions in biomolecules by means of pulsed dipolar EPR spectroscopy

2021 ◽  
Author(s):  
Dinar Abdullin ◽  
Olav Schiemann
Keyword(s):  
Electron Paramagnetic Resonance ◽  
Metal Ions ◽  
Epr Spectroscopy ◽  
Electron Paramagnetic Resonance Spectroscopy ◽  
Spin Labeling ◽  
Resonance Spectroscopy ◽  
Paramagnetic Resonance ◽  
Paramagnetic Metal ◽  
Site Directed Spin Labeling ◽  
Electron Paramagnetic

A method is introduced in which paramagnetic metal ions are localized by means of trilateration using a combination of site-directed spin labeling and pulsed dipolar electron paramagnetic resonance spectroscopy.

scholarly journals Electron paramagnetic resonance and mass spectrometry: Useful tools to detect ultraviolet light induced skin lesions on a molecular basis – A short review

2006 ◽  
Vol 20 (1) ◽  
pp. 1-17 ◽  
Author(s):  
Ulrike Hochkirch ◽  
Werner Herrmann ◽  
Reinhard Stößer ◽  
Hans-Hubert Borchert ◽  
Michael W. Linscheid
Keyword(s):  
Electron Paramagnetic Resonance ◽  
Ultraviolet Radiation ◽  
Direct Detection ◽  
Electron Paramagnetic Resonance Spectroscopy ◽  
Skin Lesions ◽  
Spectrometric Analysis ◽  
Resonance Spectroscopy ◽  
Ambient Conditions ◽  
Paramagnetic Resonance ◽  
Electron Paramagnetic

Ultraviolet radiation is considered responsible for sunburning, premature skin aging, and cancerogenesis through the production of free radical species. Therefore, the favoured possibility for direct detection of unpaired electrons – electron paramagnetic resonance spectroscopy – is predestinated for detection and structural and dynamic analysis of this kind of molecules. However, many of UV induced radicals in skin have a short lifetime at ambient conditions and possibilities for stabilisation or transformation into definite para- or diamagnetic products have to be found. On the other hand, diamagnetic products, potentially also originated by reporter molecules, which are not detectable by EPR, are target molecules for mass spectrometric analysis. In this review, potentials and limitations of both spectroscopic methods are reviewed, and the effect of ultraviolet radiation on human skin is discussed in particular. Suitable combinations of both techniques result in detailed information about photoproducts and processes taking place within skin during and after irradiation. The literature is viewed from a recent perspective; historical aspects were not in the scope of this paper.

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