A comparative study of magnetization dynamics in dinuclear dysprosium complexes featuring bridging chloride or trifluoromethanesulfonate ligands.

Title A comparative study of magnetization dynamics in dinuclear dysprosium complexes featuring bridging chloride or trifluoromethanesulfonate ligands.
Authors C.P. Burns; B.O. Wilkins; C.M. Dickie; T.P. Latendresse; L. Vernier; K.R. Vignesh; N.S. Bhuvanesh; M. Nippe
Journal Chem Commun (Camb)
DOI 10.1039/c7cc02457f
Abstract

We utilized a rigid ligand platform PyCp2(2-) (PyCp2(2-) = [2,6-(CH2C5H3)2C5H3N](2-)) to isolate dinuclear Dy(3+) complexes [(PyCp2)Dy-(?-O2SOCF3)]2 (1) and [(PyCp2)Dy-(?-Cl)]2 (3) as well as the mononuclear complex (PyCp2)Dy(OSO2CF3)(thf) (2). Compounds 1 and 2 are the first examples of organometallic Dy(3+) complexes featuring triflate binding. The isolation of compounds 1 and 3 allows us to comparatively evaluate the effects of the bridging anions on the magnetization dynamics of the dinuclear systems. Our investigations show that although the exchange coupling interactions differ for 1 and 3, the dynamic magnetic properties are dominated by relaxation via the first excited state Kramers doublet of the individual Dy sites. Compounds 1 and 3 exhibit barriers to magnetization reversal (Ueff = 49 cm(-1)) that can be favorably compared to those of the previously reported examples of [Cp2Dy(?-Cl)]2 (Ueff = 26 cm(-1)) and [Cp2Dy(thf)(?-Cl)]2 (Ueff = 34 cm(-1)).

Citation C.P. Burns; B.O. Wilkins; C.M. Dickie; T.P. Latendresse; L. Vernier; K.R. Vignesh; N.S. Bhuvanesh; M. Nippe.A comparative study of magnetization dynamics in dinuclear dysprosium complexes featuring bridging chloride or trifluoromethanesulfonate ligands.. Chem Commun (Camb). 2017;53(60):84198422. doi:10.1039/c7cc02457f

Related Elements

Chlorine

Chlorine is a Block P, Group 17, Period 3 element. Its electron configuration is [Ne]3s23p5. The chlorine atom has a covalent radius of 102±4 pm and its Van der Waals radius is 175 pm. Chlorine ModelIn its elemental form, chlorine is a yellow-green gas. Chlorine is the second lightest halogen after fluorine. It has the third highest electronegativity and the highest electron affinity of all elements, making it a strong oxidizing agent. It is rarely found by itself in nature. Chlorine was discovered and first isolated by Carl Wilhelm Scheele in 1774. It was first recognized as an element by Humphry Davy in 1808.

Dysprosium

See more Dysprosium products. Dysprosium (atomic symbol: Dy, atomic number: 66) is a Block F, Group 3, Period 6 element with an atomic radius of 162.5. Dysprosium Bohr ModelThe number of electrons in each of dysprosium's shells is [2, 8, 18, 28, 8, 2] and its electron configuration is [Xe]4f10 6s2. The dysprosium atom has an atomic radius of 178 pm and a Van der Waals radius of 229 pm. Dysprosium was first discovered by Paul Emile Lecoq de Boisbaudran in 1886. In its elemental form, dysprosium has a silvery-white appearance. Elemental Dysprosium PictureIt is a member of the lanthanide or rare earth series of elements and, along with holmium, has the highest magnetic strength of all other elements on the periodic table, especially at low temperatures. Dysprosium is found in various minerals including bastnäsite, blomstrandine, euxenite, fergusonite, gadolinite, monazite, polycrase and xenotime. It is not found in nature as a free element. The element name originates from the Greek word dysprositos, meaning hard to get at.