[235]. A.M. Ako, V. Mereacre, I.J. Hewitt, R. Clérac, L. Lecren, C.E. Anson, A.K. Powell, “Enhancing single molecule magnet parameters. Synthesis, crystal structures and magnetic properties of mixed-valent Mn4 SMMs”, J. Mater. Chem., (2006), 16, 2579-2586 / 10.1039/b604611h