A family of enneanuclear iron(II) single-molecule magnets

Chemistry : a European Journal
Athanassios K BoudalisSpyros P Perlepes

Abstract

Complexes [Fe9(X)2-(O2CMe)8{(2-py)2CO2}4] (X(-)=OH(-) (1), N3(-) (2), and NCO(-) (3)) have been prepared by a route previously employed for the synthesis of analogous Co(9) and Ni(9) complexes, involving hydroxide substitution by pseudohalides (N3(-), NCO(-)). As indicated by DC magnetic susceptibility measurements, this substitution induced higher ferromagnetic couplings in complexes 2 and 3, leading to higher ground spin states compared to that of 1. Variable-field experiments have shown that the ground state is not well isolated from excited states, as a result of which it cannot be unambiguously determined. AC susceptometry has revealed out-of-phase signals, which suggests that these complexes exhibit a slow relaxation of magnetization that follows Arrhenius behavior, as observed in single-molecule magnets, with energy barriers of 41 K for 2 (tau 0=3.4 x 10(-12) s) and 44 K for 3 (tau 0=2.0 x 10(-11) s). Slow magnetic relaxation has also been observed by zero-field 57Fe Mössbauer spectroscopy. Characteristic integer-spin electron paramagnetic resonance (EPR) signals have been observed at X-band for 1, whereas 2 and 3 were found to be EPR-silent at this frequency. 1H NMR spectrometry in CD3CN has shown that complexes 1-3 are...Continue Reading

References

Sep 1, 1989·Biophysical Journal·M P Hendrich, P G Debrunner
May 13, 1996·Physical Review Letters·J R FriedmanR Ziolo
Feb 12, 2000·Angewandte Chemie·M R Bürgstein, P W Roesky
Apr 12, 2001·Nature·M N Leuenberger, D Loss
Jan 28, 2003·Angewandte Chemie·Dante Gatteschi, Roberta Sessoli
Jul 17, 2003·Journal of the American Chemical Society·Naoto IshikawaYoukoh Kaizu
Aug 19, 2003·Angewandte Chemie·Catherine Dendrinou-SamaraVincent L Pecoraro
Apr 15, 2004·Angewandte Chemie·Anastasios J TasiopoulosGeorge Christou
Apr 22, 2004·Journal of the American Chemical Society·Markus R BürgsteinPeter W Roesky
Apr 27, 2004·Angewandte Chemie·Athanassios K BoudalisSpyros P Perlepes
Jul 9, 2004·Inorganic Chemistry·Muralee MurugesuEuan K Brechin
Jul 15, 2004·Journal of the American Chemical Society·Hiroki OshioMotohiro Nakano
Jul 28, 2004·Chemical Communications : Chem Comm·Shinji KanegawaNoboru Koga
Nov 9, 2004·Inorganic Chemistry·Philippa KingGeorge Christou
Jan 26, 2005·Angewandte Chemie·Massimiliano CavalliniFabio Biscarini
Mar 18, 2005·Journal of the American Chemical Society·Naoto IshikawaWolfgang Wernsdorfer
Apr 12, 2005·Inorganic Chemistry·Evan M RumbergerDavid N Hendrickson
Jul 4, 2006·Inorganic Chemistry·Dongfeng LiStephen M Holmes
Jul 6, 2006·Angewandte Chemie·Ayuk M AkoAnnie K Powell

❮ Previous
Next ❯

Citations

Jun 20, 2017·Dalton Transactions : an International Journal of Inorganic Chemistry·Zoi G LadaGeorge Mitrikas
Dec 15, 2015·Dalton Transactions : an International Journal of Inorganic Chemistry·Alexandros A KitosSpyros P Perlepes
Feb 3, 2015·Dalton Transactions : an International Journal of Inorganic Chemistry·Dimosthenis P GiannopoulosTheocharis C Stamatatos
Sep 19, 2017·Dalton Transactions : an International Journal of Inorganic Chemistry·Anastasia N GeorgopoulouCatherine P Raptopoulou
Jun 16, 2015·Chemistry : a European Journal·Kartik Chandra MondalAnnie K Powell
Nov 15, 2018·Dalton Transactions : an International Journal of Inorganic Chemistry·Zu-Zhen ZhangChen-I Yang
Aug 12, 2009·Chemphyschem : a European Journal of Chemical Physics and Physical Chemistry·Christos LampropoulosGeorge Christou
Apr 16, 2011·Dalton Transactions : an International Journal of Inorganic Chemistry·Anastasia N GeorgopoulouAthanassios K Boudalis
Aug 24, 2010·Chemical Communications : Chem Comm·Yuan-Zhu ZhangSong Gao
Dec 18, 2008·Dalton Transactions : an International Journal of Inorganic Chemistry·Constantinos C StoumposSpyros P Perlepes
Jan 26, 2012·Chemical Communications : Chem Comm·Francesco PigaJoris van Slageren
Feb 22, 2012·Dalton Transactions : an International Journal of Inorganic Chemistry·Konstantis F KonidarisSpyros P Perlepes
Oct 16, 2008·Dalton Transactions : an International Journal of Inorganic Chemistry·Anastasios J Tasiopoulos, Spyros P Perlepes
May 11, 2013·Dalton Transactions : an International Journal of Inorganic Chemistry·Amer BaniodehAnnie K Powell
Mar 8, 2019·Chemical Science·Dimitris I AlexandropoulosKim R Dunbar
Jul 12, 2011·Dalton Transactions : an International Journal of Inorganic Chemistry·Anastasia N GeorgopoulouAthanassios K Boudalis
Jul 8, 2014·Dalton Transactions : an International Journal of Inorganic Chemistry·Pallab BhowmikAshutosh Ghosh
Dec 8, 2011·Dalton Transactions : an International Journal of Inorganic Chemistry·Christos M KizasAnastasios J Tasiopoulos
Jul 15, 2018·Scientific Reports·Yuanzheng ChenHui Wang
Dec 20, 2011·Chemical Communications : Chem Comm·Gabriel BrunetMuralee Murugesu
Jun 24, 2014·Chemical Communications : Chem Comm·Ya-Min LiSheng-Chang Xiang
Jan 7, 2017·Dalton Transactions : an International Journal of Inorganic Chemistry·Chun-Hung ChiangGene-Hsiang Lee
May 8, 2009·Dalton Transactions : an International Journal of Inorganic Chemistry·Theocharis C StamatatosAthanassios K Boudalis
May 8, 2009·Dalton Transactions : an International Journal of Inorganic Chemistry·Gerasimi LazariAthanassios K Boudalis
Jan 31, 2013·Chemistry : a European Journal·Rituparna BiswasAshutosh Ghosh

❮ Previous
Next ❯

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.