The Faraday effect

Schatz, P. N.; McCaffery, A. J.

doi:10.1039/qr9692300552

Cited by 346 publications

(114 citation statements)

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“…These are mainly a result of the very much greater relative intensities of the spin forbidden bands as compared to spin allowed bands in rncd (2). It proves possible to assign transitions to both of the triplet bands that are expected in octahedral d6 complexes and as well to assign the position of the previously unreported quintet.…”

Section: Introductionmentioning

confidence: 72%

Magnetic circular dichroism spectra of cobalt(III) amine complexes of photochemical importance

Hollebone¹,

Langford²,

Malkhasian³

1985

Can. J. Chem.

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. 63, 1918 (1985). Magnetic circular dichroism spectra of several acidoamine cobalt(ll1) complexes are reported which reveal B terms for the spin allowed bands and A terms for the spin forbidden bands. It is shown that ligand field parameters derived from fitting of a full set of spin forbidden bands, including the quintet, gives Racah B and C electron repulsion parameters closer to those anticipated from theory than has been common using mainly the singlets and a single weak low energy absorption feature assigned to a triplet. The spectra indicate that the quintet which has figured in numerous photochemical speculations lies at relatively high energy. This conclusion is a consequence of both the recognition of an A term assignable to the quintet and the best fit ligand field parameters for all bands. 1918 (1985).On a dCterminC les spectres mcd de plusieurs complexes d'acidoamine de cobalt(1ll) qui mettent en evidence les termes B des bandes permises de spin et les termes A des bandes interdites de spin. On montre que les paramktres de champs de ligand que I'on peut obtenir en ajustant un ensemble complet de bandes interdites de spin, y compris le quintuplet, donne des paramktres de rCpulsion Clectronique du type Racah B et C qui se rapprochent d'avantage de ceux que l'on a gCnCralement obtenus en faisant principalement appel aux singulets et ? I une caractkristique unique et faible d'absorption de basse Cnergie qui Ctait attribuCe Bun triplet. Les spectres indiquent que I'Cnergie du quintuplet que l'on invoque dan~-~lusieurs spCculations photochimiques se situe i un niveau relativement ClevC. Cette conclusion rksulte i la fois de la reconnaissance du terme A attribuable au quintuplet ainsi qu'i un meilleur ajustement des paramktres de champ du ligand pour toutes les bandes.[Traduit par le journal] Introduction The assignment of the ligand field states and appropriate ligand field parameters to complexes of the d 6 Co(II1) acido amine complexes is a classic problem in ligand field theory (1). Yet it remains incomplete in the sense that empirical information on the spin forbidden states is sparse.This report concerns the gains in information which result from the use of magnetic circular dichroism (rncd) spectra. These are mainly a result of the very much greater relative intensities of the spin forbidden bands as compared to spin allowed bands in rncd (2). It proves possible to assign transitions to both of the triplet bands that are expected in octahedral d6 complexes and as well to assign the position of the previously unreported quintet. These accomplishments in cobalt spectroscopy are not without precedent. In earlier work, it has proven possible to use rncd to resolve a spin forbidden ligand field band from under the tail of an allowed charge transfer transition (3) and to assign a doublet band which occurs between the two spin allowed bands in the spectrum of an octahedral d 3 Cr(II1) complex (4).The bands are interpreted in terms of octahedral local splitting~. Reductions in symmetry are not large enoug...

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Section: Introductionmentioning

confidence: 72%

Magnetic circular dichroism spectra of cobalt(III) amine complexes of photochemical importance

Hollebone¹,

Langford²,

Malkhasian³

1985

Can. J. Chem.

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“…and resembles the first derivative of the absorption spectrum; in contrast, the ! and ~terms .are 11 bell-shaped 11 and approximate the shape of the absorption band (see Schatz and McCaffery, 1969~ and Stephens~ 1974, for recent reviews). While electron paramagnetic resonance (EPR) studies are also useful for investigating heme chemistry, they are restricted to Fe(III) complexes; also low temperatures are required due to the rapid spin-lattice relaxation of the iron in these compounds, whereas physiological temperatures and rapid kinetic -6-measurements can be obtained by.the MCD technique.…”

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confidence: 99%

Magnetic circular dichroism studies on microsomal aryl hydrocarbon hydroxylase: Comparison with cytochrome b5 and cytochrome P-450cam

Vickery

Salmon

Sauer

1975

Biochimica et Biophysica Acta (BBA) - Protein Structure

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“…The application of additional perturbations, as it happens when external and not necessarily uniform electric and magnetic fields are introduced in the experimental design, yields further complications to the picture, implying the combination of first-order, linear and nonlinear properties, bearing the signature of the various multipoles excited by the combined effect of light and fields. 1,3 Examples which have been studied in some depth in our groups are Kerr,8,9 Optical Kerr, [10][11][12] Cotton-Mouton, [13][14][15][16][17][18][19][20] Buckingham, [21][22][23][24][25][26][27] magnetoelectric and Jones [28][29][30][31][32][33][34] linear birefringences; Faraday 4,[35][36][37] and optical Faraday 38 circular birefringences; magnetochiral axial birefringence; 39,40 or magnetic circular [41][42][43][44][45][46][47][48][49] and magnetochiral …”

Section: Introductionmentioning

confidence: 99%

A density functional theory study of magneto-electric Jones birefringence of noble gases, furan homologues, and mono-substituted benzenes

Fahleson

Norman

Coriani

et al. 2013

The Journal of Chemical Physics

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We report on the results of a systematic ab initio study of the Jones birefringence of noble gases, of furan homologues, and of monosubstituted benzenes, in the gas phase, with the aim of analyzing the behavior and the trends within a list of systems of varying size and complexity, and of identifying candidates for a combined experimental/theoretical study of the effect. We resort here to analytic linear and nonlinear response functions in the framework of time-dependent density functional theory. A correlation is made between the observable (the Jones constant) and the atomic radius for noble gases, or the permanent electric dipole and a structure/chemical reactivity descriptor as the para Hammett constant for substituted benzenes.

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The Faraday effect

Cited by 346 publications

References 1 publication

Magnetic circular dichroism spectra of cobalt(III) amine complexes of photochemical importance

Magnetic circular dichroism spectra of cobalt(III) amine complexes of photochemical importance

Magnetic circular dichroism studies on microsomal aryl hydrocarbon hydroxylase: Comparison with cytochrome b5 and cytochrome P-450cam

A density functional theory study of magneto-electric Jones birefringence of noble gases, furan homologues, and mono-substituted benzenes

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