Slow magnetic relaxation from hard-axis metal ions in tetranuclear single-molecule magnets

Chemistry : a European Journal
Erik TanciniAndrea Cornia

Abstract

We report the synthesis of the novel heterometallic complex [Fe(3)Cr(L)(2)(dpm)(6)]⋅Et(2)O (Fe(3)CrPh) (Hdpm=dipivaloylmethane, H(3)L=2-hydroxymethyl-2-phenylpropane-1,3-diol), obtained by replacing the central iron(III) atom by a chromium(III) ion in an Fe(4) propeller-like single-molecule magnet (SMM). Structural and analytical data, high-frequency EPR (HF-EPR) and magnetic studies indicate that the compound is a solid solution of chromium-centred Fe(3)Cr (S=6) and Fe(4) (S=5) species in an 84:16 ratio. Although SMM behaviour is retained, the |D| parameter is considerably reduced as compared with the corresponding tetra-iron(III) propeller (D=-0.179 vs. -0.418 cm(-1)), and results in a lower energy barrier for magnetisation reversal (U(eff)/k(B)=7.0 vs. 15.6 K). The origin of magnetic anisotropy in Fe(3)CrPh has been fully elucidated by preparing its Cr- and Fe-doped Ga(4) analogues, which contain chromium(III) in the central position (c) and iron(III) in two magnetically distinct peripheral sites (p1 and p2). According to HF-EPR spectra, the Cr and Fe dopants have hard-axis anisotropies with D(c)=0.470(5) cm(-1), E(c)=0.029(1) cm(-1), D(p1)=0.710(5) cm(-1), E(p1)=0.077(3) cm(-1), D(p2)=0.602(5) cm(-1), and E(p2)=0.101(3) cm(...Continue Reading

References

Dec 1, 1989·Physical Review. B, Condensed Matter·C DekkerJ A Mydosh
Jul 26, 2002·Journal of the American Chemical Society·Susanne MossinAnne-Laure Barra
Feb 26, 2004·Angewandte Chemie·Andrea CorniaAnne-Laure Barra
Aug 11, 2004·Dalton Transactions : an International Journal of Inorganic Chemistry·Alejandro Solano-PeraltaTakato Nakamura
Mar 8, 2005·Nature Materials·Alexandre R RochaStefano Sanvito
Jul 21, 2005·Journal of the American Chemical Society·Takashi KajiwaraNorimichi Kojima
Aug 13, 2005·The Journal of Chemical Physics·Jordi Ribas-ArinoMark R Pederson
Apr 6, 2006·Journal of the American Chemical Society·Stefania AccorsiLaura Zobbi
Feb 21, 2007·Journal of the American Chemical Society·Constantinos J MiliosEuan K Brechin
Aug 10, 2007·Journal of the American Chemical Society·Anne-Laure BarraLorenzo Sorace
Sep 25, 2007·Journal of the American Chemical Society·Constantinos J MiliosEuan K Brechin
Feb 26, 2008·Nature Materials·Lapo Bogani, Wolfgang Wernsdorfer
Feb 3, 2009·Nature Materials·Matteo ManniniRoberta Sessoli
Apr 14, 2009·Inorganic Chemistry·Dante GatteschiRoberta Sessoli
May 23, 2009·Chemistry : a European Journal·Luisa GregoliAndrea Cornia

❮ Previous
Next ❯

Citations

Sep 10, 2014·Chemistry : a European Journal·Kátia Cristina M WestrupRoberta Sessoli
Dec 17, 2014·Inorganic Chemistry·Suraj MondalSasankasekhar Mohanta
Feb 9, 2012·Chemistry : a European Journal·Luca VergnaniAndrea Cornia
Sep 22, 2011·Chemistry : a European Journal·Ye BiSong Gao
May 30, 2012·Dalton Transactions : an International Journal of Inorganic Chemistry·Thazhe Kootteri PrasadAndrea Cornia
Jan 31, 2013·Dalton Transactions : an International Journal of Inorganic Chemistry·Catalin MaximCyrille Train
Oct 2, 2017·The Review of Scientific Instruments·M BlankenhornM Dressel
Apr 6, 2011·Dalton Transactions : an International Journal of Inorganic Chemistry·Luke J BatchelorEric J L McInnes
Jan 3, 2013·Dalton Transactions : an International Journal of Inorganic Chemistry·Pasquale TotaroRoberta Sessoli
Apr 9, 2011·Chemical Society Reviews·Motohiro Nakano, Hiroki Oshio
Jun 4, 2011·Dalton Transactions : an International Journal of Inorganic Chemistry·L CastelliL Sorace
Jul 21, 2012·Dalton Transactions : an International Journal of Inorganic Chemistry·Chang-Long ZhouSong Gao
Jul 12, 2014·Physical Chemistry Chemical Physics : PCCP·Luca RigamontiRoberta Sessoli
Jun 27, 2014·Dalton Transactions : an International Journal of Inorganic Chemistry·Yuan-Yuan ZhuSong Gao
Sep 3, 2013·Small·Mauro PerfettiRoberta Sessoli
May 11, 2013·Inorganic Chemistry·Luca RigamontiAndrea Cornia
Nov 10, 2011·Journal of the American Chemical Society·Wesley A HoffertMatthew P Shores
Apr 13, 2012·Journal of the American Chemical Society·Xiaowen FengJeffrey R Long

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.

Related Papers

Dalton Transactions : an International Journal of Inorganic Chemistry
Thazhe Kootteri PrasadAndrea Cornia
Journal of Magnetic Resonance
Fadi El HallakAndrea Cornia
Journal of the American Chemical Society
Jordi Ribas-ArinoMark R Pederson
© 2021 Meta ULC. All rights reserved