Lanthanoid pyridyl-β-diketonate 'triangles'. New examples of single molecule toroics

Dalton Transactions : an International Journal of Inorganic Chemistry
Chiara CaporaleRebecca O Fuller

Abstract

Trinuclear lanthanoid clusters have been synthesised and investigated as toroidal spin systems. A pyridyl functionalised β-diketonate, 1,3-bis(pyridin-2-yl)propane-1,3-dione (o-dppdH) has been used to synthesise a family of clusters of the form [Dy3(OH)2(o-dppd)3Cl2(H2O)4]Cl2·7H2O (1), [Tb3(o-dppd)3(μ3-OH)2(CH3CH2OH)3Cl3][Tb3(o-dppd)3(μ3-OH)2(H2O)(CH3CH2OH)2Cl3]Cl2·H2O (2), [Ho3(OH)2(o-dppd)3Cl(H2O)5]Cl3·3H2O (3) and [Er3(OH)2(o-dppd)3Cl2(H2O)3(CH3OH)]Cl2·3H2O·CH3OH (4). Despite the previous occurrence of this structural motif in the literature, these systems have not been widely investigated in terms of torodic behaviour. Magnetic studies were used to further characterise the complexes. DC susceptibility studies support weak antiferromagnetic exchange in the complexes. Slow magnetic relaxation behaviour is observed in the dynamic AC magnetic studies for complex 1. Theoretical studies predict that complex 1 and 3 have a non-magnetic ground state based on a toroidal arrangement of spins. Changes to the coordination environment in 2 do not support a toroic spin state. The prolate nature of the ErIII centres in complex 4 and large transverse anisotropy do not support the toroidal arrangement of lanthanoid spins in the complex.

References

Aug 11, 2005·Physical Review Letters·Hosho KatsuraAlexander V Balatsky
May 31, 2007·Dalton Transactions : an International Journal of Inorganic Chemistry·Ana de Bettencourt-Dias
Dec 7, 2007·Dalton Transactions : an International Journal of Inorganic Chemistry·Philip C AndrewsPeter W Roesky
Dec 25, 2007·Acta Crystallographica. Section A, Foundations of Crystallography·George M Sheldrick
Jul 23, 2008·Physical Review Letters·Javier LuzonRoberta Sessoli
Aug 31, 2010·Angewandte Chemie·Shang-Da JiangSong Gao
Sep 1, 2012·Dalton Transactions : an International Journal of Inorganic Chemistry·Javier Luzon, Roberta Sessoli
Nov 1, 2012·Journal of the American Chemical Society·Liviu UngurLiviu F Chibotaru
Nov 13, 2012·Angewandte Chemie·Shuang-Yan LinHong-Jie Zhang
Apr 5, 2013·Chemical Reviews·Daniel N WoodruffRichard A Layfield
May 23, 2013·Inorganic Chemistry·Liviu UngurLiviu F Chibotaru
Aug 21, 2014·Chemical Communications : Chem Comm·Brodie L ReidMassimiliano Massi
Oct 7, 2014·Journal of the American Chemical Society·Daniel D'AlessioMark I Ogden
Jan 9, 2015·Acta Crystallographica. Section C, Structural Chemistry·George M Sheldrick
Jul 17, 2015·Chemistry : a European Journal·Luca RigamontiAndrea Cornia
Sep 19, 2015·Chemistry : a European Journal·Chinmoy DasMaheswaran Shanmugam
Aug 25, 2017·Nature·Conrad A P GoodwinDavid P Mills
Apr 18, 2019·Dalton Transactions : an International Journal of Inorganic Chemistry·Sourav BiswasVadapalli Chandrasekhar
Sep 5, 2019·Dalton Transactions : an International Journal of Inorganic Chemistry·Stuart K LangleyKeith S Murray

❮ Previous
Next ❯

Methods Mentioned

BETA
X-ray
NMR
atomic emission spectroscopy

Software Mentioned

RASSI
MOLCAS
CrystalExplorer
SHELX
SO
2014
POLY
ANISO
SINGLE
SHELXL

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.