Substituted versus Naked Thiourea Ligand Containing Pseudotetrahedral Cobalt(II) Complexes: A Comparative Study on Its Magnetization Relaxation Dynamics Phenomenon

Inorganic Chemistry
Shefali VaidyaMaheswaran Shanmugam

Abstract

A series of mononuclear tetrahedral cobalt(II) complexes with the general molecular formula [Co(L1)2X2] [where L1= tetramethylthiourea ([(CH3)2N]2C═S) and X = Cl (1), Br (2), and I (3)] were isolated, and their structures were characterized by single-crystal X-ray diffraction. The experimental direct-current magnetic data are excellently reproduced by fitting both χMT( T) and M( H) simultaneously using the spin Hamiltonian (SH) parameters D1= -18.1 cm-1and g1,iso= 2.26, D2= -16.4 cm-1and g2,iso= 2.33, and D3= -22 cm-1and g3,iso= 2.4 for 1-3, respectively, and the sign of D was unambiguously confirmed from X-band electron paramagnetic resonance measurements. The effective energy barrier extracted for the magnetically diluted complexes 1-3 (10%) is larger than the barrier observed for the pure samples and implies a nonzero contribution of dipolar interaction to the magnetization relaxation dynamics. The SH parameters extracted for the three complexes drastically differ from their respective parent complexes that possess the general molecular formula [Co(L)2X2] [where L = thiourea [(NH2)2C═S] and X = Cl (1a), Br (2a), and I (3a)], which is rationalized by detailed ab initio calculations. An exhaustive theoretical study reveals tha...Continue Reading

References

Sep 29, 2005·Journal of Magnetic Resonance·Stefan Stoll, Arthur Schweiger
Dec 25, 2007·Acta Crystallographica. Section A, Foundations of Crystallography·George M Sheldrick
Apr 14, 2009·Inorganic Chemistry·Norihisa HoshinoHiroki Oshio
Dec 23, 2009·Inorganic Chemistry·Dimitrios MaganasEdgar J J Groenen
Apr 28, 2010·Chemical Society Reviews·Mark Murrie
Dec 15, 2010·Journal of the American Chemical Society·W Hill HarmanChristopher J Chang
Feb 17, 2011·Faraday Discussions·Frank Neese, Dimitrios A Pantazis
Sep 9, 2011·Journal of the American Chemical Society·Titel JurcaDarrin S Richeson
Dec 7, 2011·Journal of the American Chemical Society·Joseph M Zadrozny, Jeffrey R Long
Sep 1, 2012·Chemical Communications : Chem Comm·Claire LydonLeroy Cronin
Nov 28, 2012·Chemistry : a European Journal·Renaud RuampsTalal Mallah
Apr 17, 2013·Journal of the American Chemical Society·Silvia Gomez-CocaEliseo Ruiz
Jun 22, 2013·Nature Chemistry·Joseph M ZadroznyJeffrey R Long
Jul 8, 2014·Inorganic Chemistry·Paula CucosMarius Andruh
Aug 15, 2014·Journal of the American Chemical Society·Lei ChenZi-Ling Xue
Sep 4, 2014·Chemical Communications : Chem Comm·Mohamed R Saber, Kim R Dunbar
Nov 6, 2014·Chemical Communications : Chem Comm·Shefali VaidyaMaheswaran Shanmugam
Feb 27, 2015·Chemical Society Reviews·Gavin A Craig, Mark Murrie
Jul 15, 2015·Chemical Society Reviews·Stephen T Liddle, Joris van Slageren
Jul 23, 2015·Journal of the American Chemical Society·Valentin V NovikovRichard E P Winpenny
Sep 24, 2015·Dalton Transactions : an International Journal of Inorganic Chemistry·L SmolkoR Boča
Oct 7, 2015·Chemical Communications : Chem Comm·Feng ShaoTalal Mallah
Nov 10, 2009·Journal of Chemical Theory and Computation·Rémi MauriceNathalie Guihéry
Feb 18, 2016·Nature Communications·Yvonne RechkemmerJoris van Slageren
May 7, 2016·Accounts of Chemical Research·Javeed Ahmad SheikhSanjit Konar
Dec 13, 2016·Journal of the American Chemical Society·Xiao-Nan YaoSong Gao
May 18, 2017·Chemistry : a European Journal·Shefali VaidyaMaheswaran Shanmugam
Dec 1, 2015·Chemical Science·Katie E R MarriottMark Murrie

❮ Previous
Next ❯

Citations

May 9, 2019·Dalton Transactions : an International Journal of Inorganic Chemistry·Tao WuYan-Zhen Zheng
May 9, 2019·Chemistry, an Asian Journal·Yanfeng CuiShiming Lei
Dec 19, 2019·Dalton Transactions : an International Journal of Inorganic Chemistry·D Kowalkowska-ZedlerA Pladzyk
Aug 14, 2020·Dalton Transactions : an International Journal of Inorganic Chemistry·J HrubýP Neugebauer
Oct 10, 2020·Dalton Transactions : an International Journal of Inorganic Chemistry·Hui-Hui CuiZi-Ling Xue

❮ 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.