Magnetic circular dichroism spectroscopy of weakly exchange coupled transition metal dimers: A model study

Magnetic circular dichroism and computational study of mononuclear and dinuclear iron(iv) complexes

“…MCD magnetization data of complex 2 are presented in Fig. 6 , in which the dots represent experimental data collected at the selected wavelengths of 414, 520, 592, 637 and 853 nm as function of applied fields from 0 to 7 T at temperatures of 2, 5, 10 and 20 K. The data have been simulated by using a SH approach 12 , 41 for a ferromagnetically exchange-coupled dimer of two local spins S i = 1 with ZFS and exchange parameters as discussed below (Table S1 † ). As expected, the isothermal magnetization curves show significant nesting behavior, which indicates a considerable ZFS in the S = 2 ground state of complex 2 .…”

“…This method has been successfully applied to analyze MCD spectra of mono- 13 as well as di-nuclear transition metal complexes. 14 …”

Use of magnetic circular dichroism to study dinuclear metallohydrolases and the corresponding biomimetics

“…Several books, book chapters, and review articles describing the application of magnetic circular dichroism (MCD) spectroscopy to the study of metalloenzymes and proteins have appeared in the last 15 years (Solomon et al 1995(Solomon et al , 2000(Solomon et al , 2003Johnson 2000;Mason 2007;Piligkos et al 2009). Several of reviews on dinuclear metallohydrolases have also been published (Wilcox 1996;Ciurli et al 1999;Kimura 2000;Holz 2002;Lowther and Matthews 2002;Averill 2003;Weston 2005;Mitić et al 2006;Schenk et al 2012).…”

Frequency domain magnetic resonance and magnetic circular dichroism studies on Ni4 cubane molecular nanomagnets: A magnetic anisotropy investigation

“…These data provide qualitative support for the ZFS obtained from FDMRS in the solid state. The nesting of the magnetisation curves could be exploited for the quantitative determination of the ZFS in 1 as it has been achieved for mononuclear iron centres in non-heme metalloenzymes [60] and a quantitative estimation of the ZFS could follow the approaches developed for weakly exchange-coupled transition metal heterodimers [61]. Nevertheless, it is interesting to observe the different response of the SQUID and MCD techniques on 1 measured as powder and frozen solution respectively.…”