scholarly journals Two Tetranuclear Butterfly-Shaped Co(II) Complexes: Structure, Mass Spectrometric, and Magnetism

Crystals ◽  
2019 ◽  
Vol 9 (9) ◽  
pp. 477
Author(s):  
Qian-Jun Deng ◽  
Min Chen ◽  
Dong-Chu Chen ◽  
Chang-Ai Chen
Keyword(s):  
Single Molecule ◽  
Organic Ligand ◽  
Magnetic Behavior ◽  
Molecular Fragment ◽  
Ionization Mass ◽  
Current Field ◽  
Magnetic Characterization ◽  
Nuclear Fragment ◽  
Fragment Peak ◽  
Solvothermal Conditions

The organic ligand (1-methyl-1H-benzo[d]imidazol-2-yl)methanol (HL) was used to react with CoX2·6H2O (X = Cl and Br) under solvothermal conditions to obtain the complex [Co4(L)6(X)2] (1, X = Cl; 2, X = Br). The butterfly-shaped structure of complex 1 and 2 suggest that Co(II) ions have two different coordinated modes, which are five coordination with O3NX environment and six coordination with O4N2 environment. In addition, the electrospray ionization mass spectrometry (ESI-MS) analysis indicated that the ion molecular fragment of highest intensity was [Co4(L)6]2+, and there existed a high nuclear fragment peak of [Co7(L)12]2+. Interestingly, it was basically completely transformed into [Co7(L)12]2+ two days later, so those two complexes were relatively stable in CH3OH. Magnetic characterization exhibited that complex 1 and 2 display field-induced single-molecule magnetic behavior, of which the energy hills Ueff/kB were 28 and 20 K under direct-current field of 0.1 T, respectively.

Inducing Single Molecule Magnetic Behavior in a [Co4O4] Cubane via a Pronounced Solvatomagnetic Effect

2014 ◽  
Vol 53 (6) ◽  
pp. 2976-2982 ◽  
Author(s):  
Felix J. Klinke ◽  
Animesh Das ◽  
Serhiy Demeshko ◽  
Sebastian Dechert ◽  
Franc Meyer
Keyword(s):  
Single Molecule ◽  
Magnetic Behavior

Single-Molecule Magnetic Behavior in a Calix[8]arene-Capped Heterometallic {DyIII 4 CoII 4 } Square-Antiprismatic Cluster

2017 ◽  
Vol 2017 (41) ◽  
pp. 4879-4883 ◽  
Author(s):  
Haitao Han ◽  
Xiao-Lei Li ◽  
Xiaofei Zhu ◽  
Guoshuai Zhang ◽  
Xinxin Hang ◽  
...  
Keyword(s):  
Single Molecule ◽  
Magnetic Behavior

scholarly journals Mass Spectrometry Imaging (MSI) Delineates Thymus-Centric Metabolism In Vivo as an Effect of Systemic Administration of Dexamethasone

2021 ◽  
Vol 11 (22) ◽  
pp. 11038
Author(s):  
Yudai Tsuji ◽  
Shinichi Yamaguchi ◽  
Tomoyuki Nakamura ◽  
Masaya Ikegawa
Keyword(s):  
Mass Spectrometry ◽  
Single Molecule ◽  
Mass Spectrometry Imaging ◽  
Apoptotic Cell ◽  
Systemic Administration ◽  
Ionization Mass ◽  
Laser Desorption Ionization ◽  
Energy Status ◽  
Cortex Of The Thymus

Matrix-assisted laser desorption ionization mass spectrometry imaging (MALDI-MSI) is increasingly used in a broad range of research due to its ability to visualize the spatial distribution of metabolites in vivo. Here, we have developed a method, named thoracic Mass Spectrometry Imaging (tMSI), as a standard protocol of molecular imaging of whole-animal sectioning in various settings of mice in vivo. Further application of the strategy that involved the systemic administration of dexamethasone (DEX) in mice, enabled a dynamic shift in the energy status of multiple thoracic organs to be visualized, based on tMSI data of purine and pyrimidine metabolites. Furthermore, with the introduction of uniform manifold approximation and projection (UMAP) for tMSI data, metabolic profiles normally localized in the cortex and cortico-medullary junction (CMJ) of the thymus were drastically shifted as minor profiles into the medulla of DEX-treated thymus. As a massive apoptotic cell death in the thymic cortex was noticeable, a single molecule, which was upregulated in the cortex of the thymus, enabled us to predict ongoing immunosuppression by in vivo DEX-administration.

scholarly journals S-Functionalized Tripods with Monomethylene Spacers: Routes to Tetrairon(III) Single-Molecule Magnets with Ultrashort Tethering Groups

2020 ◽  
Vol 6 (4) ◽  
pp. 55
Author(s):  
Andrea Cornia ◽  
Chiara Danieli ◽  
Fabio Meglioli ◽  
Erik Tancini ◽  
Alessio Nicolini ◽  
...  
Keyword(s):  
Single Molecule ◽  
Crystalline Form ◽  
Molecular Magnetism ◽  
Special Importance ◽  
State Structure ◽  
Gold Surfaces ◽  
Single Molecule Magnets ◽  
Magnetic Characterization ◽  
Chemical Groups

The organization of single-molecule magnets (SMMs) on surfaces is a mainstream research path in molecular magnetism. Of special importance is the control of grafting geometry in chemisorbed monolayers on metal surfaces. We herein present the synthesis, solid-state structure, and magnetic characterization of propeller-like tetrairon(III) SMMs containing the shortest-reported tethering groups for gold surfaces. Functionalization of molecular structure is attained using 2-R-2-(hydroxymethyl)propane-1,3-diol tripodal proligands (H3LR). The R substituents comprise a monomethylene spacer and three different terminations known to act as stable precursors of S-Au bonds (R = CH2SCN, CH2SAc and CH2SSnBu). These chemical groups are shown to be chemically compatible with the tetrairon(III) core and to afford fully-functional SMMs in crystalline form and in fair to excellent yields.

Synthesis, structures and magnetism of a series of dinuclear and one-dimensional Ni–Ln complexes: single-molecule magnetic behavior in one-dimensional nitrate-bridged Dy analogue

2015 ◽  
Vol 39 (11) ◽  
pp. 8356-8363 ◽  
Author(s):  
Min-Xia Yao ◽  
Xing-Yun Lu ◽  
Zhao-Xia Zhu ◽  
Xiao-Wei Deng ◽  
Su Jing
Keyword(s):  
Single Molecule ◽  
Magnetic Behavior ◽  
One Dimensional

By using a salen-type ligand and changing the reaction solvent, a series of NiII–LnIII complexes have been obtained and structurally and magnetically characterized.

Nickel/Lanthanide Single-Molecule Magnets: {Ni3Ln} “Stars” with a Ligand Derived from the Metal-Promoted Reduction of Di-2-pyridyl Ketone under Solvothermal Conditions

2010 ◽  
Vol 49 (21) ◽  
pp. 9737-9739 ◽  
Author(s):  
Constantinos G. Efthymiou ◽  
Theocharis C. Stamatatos ◽  
Constantina Papatriantafyllopoulou ◽  
Anastasios J. Tasiopoulos ◽  
Wolfgang Wernsdorfer ◽  
...  
Keyword(s):  
Single Molecule ◽  
Single Molecule Magnets ◽  
Solvothermal Conditions

Chiral, single-molecule nanomagnets: synthesis, magnetic characterization and natural and magnetic circular dichroism

2004 ◽  
Vol 14 (15) ◽  
pp. 2455-2460 ◽  
Author(s):  
Philippe Gerbier ◽  
Neus Domingo ◽  
Jordi Gómez-Segura ◽  
Daniel Ruiz-Molina ◽  
David B. Amabilino ◽  
...  
Keyword(s):  
Circular Dichroism ◽  
Single Molecule ◽  
Magnetic Circular Dichroism ◽  
Magnetic Characterization ◽  
Circular Dichroïsm

scholarly journals TwoC3-Symmetric Dy3IIIComplexes with Triple Di-μ-methoxo-μ-phenoxo Bridges, Magnetic Ground State, and Single-Molecule Magnetic Behavior

2014 ◽  
Vol 20 (27) ◽  
pp. 8410-8420 ◽  
Author(s):  
Mikko M. Hänninen ◽  
Antonio J. Mota ◽  
Daniel Aravena ◽  
Eliseo Ruiz ◽  
Reijo Sillanpää ◽  
...  
Keyword(s):  
Single Molecule ◽  
Ground State ◽  
Magnetic Behavior ◽  
Magnetic Ground State
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