Article
Nanoscience & Nanotechnology
Yeo Jin Lee, Kyu Won Lee, Dong Min Choi, Won Koo Park, Cheol Eui Lee
Summary: In this study, the effects of proton irradiation on Bi2Se3 nanoparticles were investigated using ESR measurements, revealing enhanced ESR signals from hydrogen-doped Bi2Se3 nanoparticles under high enough proton irradiation doses. Density functional theory calculations showed that hydrogen defects act as donors with transition levels in the conduction band, leading to small activation energy of around 5meV based on temperature-dependent ESR intensity.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2021)
Article
Chemistry, Multidisciplinary
Benjamin Kintzel, Maria Fittipaldi, Michael Boehme, Alberto Cini, Lorenzo Tesi, Axel Buchholz, Roberta Sessoli, Winfried Plass
Summary: A cobalt(II)-based spin triangle exhibits significant spin-electric coupling, with an intra-triangle antiferromagnetic interaction leading to spin frustration. The separation of energy-degenerate ground doublets is attributed to magnetic anisotropy and deviations from threefold symmetry. The observed spin-electric effect under an electric field has a quantified value comparable to a Cu-3 triangle despite different antiferromagnetic interaction strengths.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Multidisciplinary
Santina S. Cruz, Vadim Tanygin, Benjamin J. Lear
Summary: Using electron spin resonance spectroscopy, it has been demonstrated that morphological asymmetries in small spheroidal metallic nanoparticles significantly affect the electronic behavior of states near the metal's Fermi energy. The study found that morphological effects were more important than size distributions in explaining the asymmetry in electronic behavior, and this was consistent across various particles made from different metals. Additionally, the study also showed that morphological changes can tune the electronic properties of even small particles, as evidenced by the modeling used to explain asymmetries in both electron spin resonance spectra and plasmon spectra.
Article
Chemistry, Multidisciplinary
Han Han, Yuheng Huang, Chun Tang, Yiming Liu, Matthew D. Krzyaniak, Bo Song, Xuesong Li, Guangcheng Wu, Yong Wu, Ruihua Zhang, Yang Jiao, Xingang Zhao, Xiao-Yang Chen, Huang Wu, Charlotte L. Stern, Yuguo Ma, Yunyan Qiu, Michael R. Wasielewski, J. Fraser Stoddart
Summary: This article introduces an organic trisradical with threefold symmetry and discusses its unique magnetic properties. The synthesized triangular prism-shaped organic cage, called PrismCage (6+), adopts a C(3) symmetry in the solid state. It can be stepwise reduced to its mono-, di-, and trisradical forms in MeCN solution. Experimental results show that TR (3•+) exhibits pronounced spin frustration. To the best of our knowledge, this is the first organic radical cage to demonstrate spin frustration. The trisradical trication of PrismCage (6+) opens up new possibilities for fundamental investigations and potential applications in the fields of both organic cages and spin chemistry.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Jake Williams, Eric Jonas
Summary: This study presents a novel machine learning technique that combines uncertainty-aware deep learning with rapid estimates of conformational geometries to accurately simulate solution NMR spectra. The method improves the accuracy of chemical shift values and can predict all scalar coupling values. The uncertainty quantification results show a strong correlation with accuracy and the method is able to handle stereoisomerism and disagreement regularization.
Article
Chemistry, Multidisciplinary
Fabrizio Moro, Shenggang Ke, Andres Granados del Aguila, Aljoscha Soll, Zdenek Sofer, Qiong Wu, Ming Yue, Liang Li, Xue Liu, Marco Fanciulli
Summary: 2D magnets are material systems that exhibit magnetic order and topological phase transitions, which can be used for novel computing architectures and magnetoelectronic devices. This paper reports the electron spin resonance properties of a layered antiferromagnetic CrSBr single crystal, showing its room temperature spin-spin correlations and XY spin model. These findings, combined with its chemical stability and semiconducting properties, make CrSBr a promising candidate for future magneto- and topological-electronics.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Physical
Jan M. M. van Ruitenbeek, Richard Korytar, Ferdinand Evers
Summary: By introducing a simple model system, we have found that chirality-induced spin selectivity can be understood as the result of constructive interference of partial waves scattered by the spin-orbit terms. Forward scattering rates are found to be independent of spin, while back scattering is spin dependent over wide energy windows.
JOURNAL OF CHEMICAL PHYSICS
(2023)
Article
Chemistry, Physical
Luis Fabregas-Ibanez, Valerie Mertens, Irina Ritsch, Tona von Hagens, Stefan Stoll, Gunnar Jeschke
Summary: This paper presents an extension to the dipolar pathways model, which is applicable to multi-dimensional dipolar EPR experiments. By studying 4-pulse DEER and TRIER experiments, the authors verify the theoretical predictions and achieve analysis of previously challenging datasets and extraction of distance distributions.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Te Bai, Jing Ai, Liyang Liao, Junwei Luo, Cheng Song, Yingying Duan, Lu Han, Shunai Che
Summary: Spin polarisation is achieved in chiral mesostructured NiO films (CMNFs) through symmetry breaking and the discovery of multi-level chirality. The study reveals that electron transfer in a chiral electric field generates effective magnetic fields and influences spin motion in the CMNFs.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Physical
Debadrita Saha, Srinivasan S. Iyengar, Philip Richerme, Jeremy M. Smith, Amr Sabry
Summary: The complexity of quantum chemical studies arises from the algebraic scaling of electron correlation methods and the exponential scaling in studying nuclear dynamics. This study provides a framework for mapping quantum chemical nuclear dynamics to quantum spin-lattice simulators. By using a short-strong hydrogen-bonded system as an example, the transformation of the Hamiltonian for nuclear degrees of freedom to a generalized Ising model Hamiltonian is demonstrated.
JOURNAL OF CHEMICAL THEORY AND COMPUTATION
(2021)
Article
Chemistry, Physical
Laura A. Voelker, Konstantin Herb, Erika Janitz, Christian L. Degen, John M. Abendroth
Summary: In this study, a quantum sensing scheme is introduced to directly measure the hypothesized spin polarization in radical pairs using shallow nitrogen-vacancy (NV) centers in diamond. This method provides fresh insights into spin selectivity in electron transfer reactions.
JOURNAL OF CHEMICAL PHYSICS
(2023)
Article
Physics, Multidisciplinary
T. G. H. Blank, K. A. Grishunin, B. A. Ivanov, E. A. Mashkovich, D. Afanasiev, A. V. Kimel
Summary: This study demonstrates a new approach to control antiferromagnetism by utilizing the magnetization emerging from a state of coherent spin precession in antiferromagnetic iron borate FeBO3, enabling the nonlinear coupling of light to another mode of spin precession.
PHYSICAL REVIEW LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Allen Alonso Rodriguez Ugalde, Steven Bloom
Summary: Water acts as a solvent and proton source in green chemical technologies, but it can also coordinate with a Lewis acidic boron atom for more interesting roles. These aquaboryl complexes uniquely activate the O-H bond of water, enabling it to function as a reducing agent, hydrogen atom transfer reagent, strong chiral acid, bifunctional hydrogen bond donor, or proton-coupled electron transfer mediator. We discuss each of these potential roles and provide relevant examples of their applications in modern sustainable synthesis.
CURRENT OPINION IN GREEN AND SUSTAINABLE CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Xue Zhang, Jose Reina-Galvez, Christoph Wolf, Yu Wang, Herve Aubin, Andreas J. Heinrich, Taeyoung Choi
Summary: Investigating the quantum properties of individual spins adsorbed on surfaces using ESR-STM has great potential for quantum information technology at the atomic scale. The magnetic tip used in the experiment is critical and can exhibit bistability, affecting the ESR spectra. The measured ESR splitting of a metal atom-molecule heterodimer was found to be tip-dependent.
Article
Chemistry, Multidisciplinary
Michael C. Boucher, Corinne E. Isaac, Peter Sun, Peter P. Borbat, John A. Marohn
Summary: The sensitivity of MRFM is limited by surface noise, but coating a thin-film polymer sample with metal can significantly reduce sample-related noise. In this study, a 12 nm gold layer was evaporated on a 40 nm nitroxide-doped polystyrene film, resulting in the inactivation of nitroxide spin labels to a depth of 20 nm. A laminated sample protocol was introduced, and a 20-fold increase in spin signal was observed using MRFM with a high-compliance cantilever. The observed signal is smaller than expected, and potential sources of loss are discussed.
Article
Chemistry, Applied
Michat Markowski, Marek Dlugosz, Anna Szakiel, Mathieu Durli, Sophie Poinsignon, Sabine Bouguet-Bonnet, Lionel Vernex-Loset, Gabriel Krier, Max Henry
NATURAL PRODUCT RESEARCH
(2019)
Article
Chemistry, Physical
Eleonora Cavallari, Carla Carrera, Silvio Aime, Francesca Reineri
Article
Chemistry, Organic
Estelle Godart, Augustin Long, Roselyne Rosas, Gilles Lemercier, Marion Jean, Sebastien Leclerc, Sabine Bouguet-Bonnet, Celia Godfrin, Laure-Lise Chapellet, Jean-Pierre Dutasta, Alexandre Martinez
Article
Chemistry, Multidisciplinary
James Eills, Eleonora Cavallari, Carla Carrera, Dmitry Budker, Silvio Aime, Francesca Reineri
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2019)
Article
Chemistry, Multidisciplinary
J. Eills, E. Cavallari, R. Kircher, G. Di Matteo, C. Carrera, L. Dagys, M. H. Levitt, K. L. Ivanov, S. Aime, F. Reineri, K. Muennemann, D. Budker, G. Buntkowsky, S. Knecht
Summary: This study introduces a novel H-1 imaging method in which hyperpolarized spin order is released for imaging through a specific biochemical reaction, while suppressing background signals from water. It allows for hyperpolarized imaging without the need for low-abundance, low-sensitivity heteronuclei.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Biochemistry & Molecular Biology
Marie E. Vuillemin, Lionel Muniglia, Michel Linder, Sabine Bouguet-Bonnet, Sophie Poinsignon, Raphael Dos Santos Morais, Blandine Simard, Cedric Paris, Florentin Michaux, Jordane Jasniewski
Summary: This study investigated the modification of gum Arabic with oxidation products of ferulic acid using Myceliophthora thermophila laccase as biocatalyst. The chemical structures of the oxidation products were identified through various analyses, and the grafting onto gum Arabic was located using NMR experiments. Some oxidation products were found to be present on modified gum Arabic near specific carbon atoms.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2021)
Article
Biochemistry & Molecular Biology
Rosella Spina, Sahar Saliba, Francois Dupire, Agata Ptak, Alain Hehn, Severine Piutti, Sophie Poinsignon, Sebastien Leclerc, Sabine Bouguet-Bonnet, Dominique Laurain-Mattar
Summary: The study found that Bacillus sp. isolated from Leucojum aestivum bulblets can synthesize primary and specialized metabolites in common with the L. aestivum plant, including important alkaloids such as Amaryllidaceae alkaloids.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2021)
Review
Radiology, Nuclear Medicine & Medical Imaging
Francesca Reineri, Eleonora Cavallari, Carla Carrera, Silvio Aime
Summary: ParaHydrogen induced polarization (PHIP) is an efficient and cost-effective hyperpolarization method, but faces challenges in biological investigations due to chemical limitations. Recent advancements in hydrogenative PHIP (h-PHIP) have expanded the possibilities of hyperpolarizing metabolites, offering new opportunities for biological applications.
MAGNETIC RESONANCE MATERIALS IN PHYSICS BIOLOGY AND MEDICINE
(2021)
Article
Chemistry, Physical
Carla Carrera, Eleonora Cavallari, Giuseppe Digilio, Oksana Bondar, Silvio Aime, Francesca Reineri
Summary: An efficient synthesis of vinyl-[1-C-13]pyruvate and its application in hyperpolarization reactions have been reported, showing that ethyl-ester is more efficient compared to allyl-ester. A high-concentration aqueous solution of the product meeting the requirements for biological applications has been obtained, and in vitro metabolic transformation has been observed.
Article
Chemistry, Multidisciplinary
Perizat Galiyeva, Herve Rinnert, Sabine Bouguet-Bonnet, Sebastien Leclerc, Lavinia Balan, Halima Alem, Sebastien Blanchard, Jordane Jasniewski, Ghouti Medjahdi, Bolat Uralbekov, Raphael Schneider
Summary: This study reports the synthesis of Mn2+-doped Ag-In-Ga-Zn-S (Mn:AIGZS) QDs, which exhibit high PL quantum yield, stability, and potential for PL/MRI dual imaging applications.
Article
Biochemistry & Molecular Biology
Beata Korchowiec, Jacek Korchowiec, Klaudia Kwiecinska, Reneta Gevrenova, Sabine Bouguet-Bonnet, Cheng Deng, Max Henry, Ewa Rogalska
Summary: The study investigated the interaction between GOTCAB saponin from the roots of Gypsophila paniculata L. and mammalian cell membrane models, revealing that cholesterol plays a crucial role in the interaction and location of the saponin within the lipid film.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Chemistry, Physical
Sabine Bouguet-Bonnet, Tristan Giraud, Loic Stefan, Marie-Christine Averlant-Petit, Daniel Canet
Summary: The article discusses the electric field gradient tensor of a nitrogen nucleus using V-ZZ and eta parameters. It suggests that the determination of NQR transition frequencies can be challenging due to sensitivity reasons. The study also shows that the motion of NH groups can be explained through water NMR relaxometry curves and used to measure the effective distance of NH groups.
JOURNAL OF PHYSICAL CHEMISTRY B
(2022)
Article
Chemistry, Multidisciplinary
Tristan Giraud, Sabine Bouguet-Bonnet, Marie-Jose Stebe, Lionel Richaudeau, Guillaume Pickaert, Marie-Christine Averlant-Petit, Loic Stefan
Summary: Peptide-based hydrogels, with ordered nanostructures formed through specific self-assembling processes, hold great promise in the biomedical field. The development of multicomponent peptide-based hydrogels presents a promising strategy to enhance their properties and design innovative materials.
Article
Chemistry, Multidisciplinary
Tristan Giraud, Sabine Bouguet-Bonnet, Philippe Marchal, Guillaume Pickaert, Marie-Christine Averlant-Petit, Loic Stefan
Article
Chemistry, Multidisciplinary
J-B Regnouf-de-Vains, B. Malaman, S. Bouguet-Bonnet, Sophie Poinsignon, Sebastien Leclerc, M. Beley
NEW JOURNAL OF CHEMISTRY
(2019)