Piligkos, Stergios;
Weihe, Høgni;
Bill, Eckhard;
Neese, Frank;
El Mkami, Hassane;
Smith, Graham M.;
Collison, David;
Rajaraman, Gopalan;
Timco, Grigore A.;
Winpenny, Richard E. P.;
McInnes, Eric J. L.
EPR Spectroscopy of a Family of CrIII7MII (M = Cd, Zn, Mn, Ni) “Wheels”: Studies of Isostructural Compounds with Different Spin Ground States
You can manage bookmarks using lists, please log in to your user account for this.
Media type:
E-Article
Title:
EPR Spectroscopy of a Family of CrIII7MII (M = Cd, Zn, Mn, Ni) “Wheels”: Studies of Isostructural Compounds with Different Spin Ground States
Contributor:
Piligkos, Stergios;
Weihe, Høgni;
Bill, Eckhard;
Neese, Frank;
El Mkami, Hassane;
Smith, Graham M.;
Collison, David;
Rajaraman, Gopalan;
Timco, Grigore A.;
Winpenny, Richard E. P.;
McInnes, Eric J. L.
Description:
<jats:title>Abstract</jats:title><jats:p><jats:bold>Spinning wheels</jats:bold>: The presented highly resolved multifrequency continuous wave EPR spectra (e.g., see figure) of the heterooctametalic “wheels” Cr<jats:sub>7</jats:sub>M provide rare examples of high nuclearity polymetallic systems where detailed information on the spin‐Hamiltonian parameters of the ground and excited spin states is observed.<jats:boxed-text content-type="graphic" position="anchor"><jats:graphic xmlns:xlink="http://www.w3.org/1999/xlink" mimetype="image/gif" position="anchor" specific-use="enlarged-web-image" xlink:href="graphic/mcontent.gif"><jats:alt-text>magnified image</jats:alt-text></jats:graphic></jats:boxed-text></jats:p><jats:p>We present highly resolved multifrequency (X‐, K‐, Q‐ and W‐band) continous wave EPR spectra of the heterooctametalic “wheels”, [(CH<jats:sub>3</jats:sub>)<jats:sub>2</jats:sub>NH<jats:sub>2</jats:sub>][Cr<jats:sup>III</jats:sup><jats:sub>7</jats:sub>M<jats:sup>II</jats:sup>F<jats:sub>8</jats:sub>((CH<jats:sub>3</jats:sub>)<jats:sub>3</jats:sub>CCOO)<jats:sub>16</jats:sub>], hereafter Cr<jats:sub>7</jats:sub>M, where M=Cd, Zn, Mn, and Ni. These experimental spectra provide rare examples of high nuclearity polymetallic systems where detailed information on the spin‐Hamiltonian parameters of the ground and excited spin states is observed. We interpret the EPR spectra by use of restricted size effective subspaces obtained by the rigorous solution of spin‐Hamiltonians of dimension up to 10<jats:sup>5</jats:sup> by use of the Davidson algorithm. We show that transferability of spin‐Hamiltonian parameters across complexes of the Cr<jats:sub>7</jats:sub>M family is possible and that the spin‐Hamiltonian parameters of Cr<jats:sub>7</jats:sub>M do not have sharply defined values, but are rather distributed around a mean value.</jats:p>