Spectroscopy magnetic circular dichroism

The MCD spectra of furan and pyrrole are similar and quite different to those of the foregoing heterocycles. Both are soft chromophores and give rise to negative absorptions. 

Such marked disparities are not observed in the MCD spectra of indole, benzo[6]furan and benzo[6 Jthiophene (80T1521, 81BCJ1511), nor those of dibenzofuran and dibenzothioph-ene (81BCJ1511). 

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Xie X L and Simon J D 1990 Picosecond magnetic circular dichroism spectroscopy J. Rhys. Chem. 94 8014-16... 

Mack, J. Stillman, M. J. Kobayashi, N. Coord. Chem. Rev. 2007, 251, 429. Mason, W. R. A Practical Guide to Magnetic Circular Dichroism Spectroscopy Wiley Hoboken, NJ, 2007. 

All three AAH enzymes require iron in order to be catalytically active (2,17-19), and a vast amount of information has accumulated on the direct and extensive involvement of the metal in the catalytic reaction (5). A solid proof for a vacant position on Fe for coordination of dioxygen was obtained by Kemsley et al. (42) using circular dichroism and magnetic circular dichroism spectroscopy and suggested a direct involvement of the metal in the catalytic reaction. 

Cole et al. (97) studied the electronic structure of the laccase trinuclear copper active site by the use of absorption, circular dichroism, and low-temperature magnetic circular dichroism spectroscopies. The assigned ligand field transition energies indicated that all three coppers have tetragonal geometries and that the two type-3 coppers are inequivalent. 

Smith NV, Padmore HA (1995) X-ray magnetic circular dichroism spectroscopy and microscopy. Mater Res Soc Bull October 41-44... 

TL2221). The mechanism of this proton transfer was also investigated using the temperature-jump relaxation technique (77JA4438). 3-Hydroxypyridine tautomer-ism has also been studied by magnetic circular dichroism spectroscopy (80BCJ3069). 

Dooley, D. M., and J. H. Dawson. Bioinorganic applications of magnetic circular dichroism spectroscopy Copper, rare-earth ions, cobalt, and non-heme iron systems. Coord. Chem. Rev. 60 (1984), 1-66. 

Schaffer, A. Absorption, Circular Dichroism, and Magnetic Circular Dichroism Spectroscopy of Metallothionein. In Methods in Enzymology, Riordan, J. F. Vallee, B. L., Eds. Academic Press San Diego, 1991 Vol. 205, pp 529-540. 

Since the discovery of slow relaxation in lanthanide complexes [11], lanthanides [184, 185] and, more recently, actinides [12, 186] have become very popular in molecular magnetism. Most of the analysis of the magnetic properties of these complexes involved powder d.c. and a.c. susceptibility and magnetization measurements [187, 188]. Other techniques used for the investigation of lanthanide-containing MNMs have included single crystal susceptibihty [189], Mossbauer spectroscopy [190], muon spin relaxation [191], and magnetic circular dichroism spectroscopy [192]. 

Six symmetrically disubstituted derivatives of r-tetrazine have been studied by linear dichroism spectroscopy in the UV-Vis region, magnetic circular dichroism spectroscopy, and theoretical calculations of structures and spectra <1995CPH(200)201>. A detailed discussion of the sensitivity and of the optothermal detection scheme for the study of nonfluorescing excited states of the r-tetrazine-argon van der Waals complex has been presented <2000MI183>. 

Application of magnetic circular dichroism spectroscopy to porphyrinoids ... 

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