Low-Temperature Magnetic Susceptibility of Ferrous Oxalate Dihydrate

De, S. K.; Barros, Simone de; Friedberg, S. A.

doi:10.1103/physrev.141.637

Cited by 21 publications

(1 citation statement)

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“…As such, they may otherwise be expected to exhibit similar pre-edge features but this is not the case due to differences in spin state, with lowspin Co III (Zarić & Niketić, 1991) and high-spin Fe II (de S. Room-temperature ($ 293 K) XAS spectra of aqueous solutions of K 3 [Fe(ox) 3 ] (15 mM) with 0.2 M KCl from static solutions (green and pink) and solutions subject to a 41 : 40 pulse flow (blue, three spectra). Barros & Friedberg, 1966;Wendlandt & Simmons, 1966). For the low-spin, (t 2g ) 6 , complex the pre-edge transitions will be of 1s !…”

Section: Resultsmentioning

confidence: 99%

XAS spectroelectrochemistry: reliable measurement of X-ray absorption spectra from redox manipulated solutions at room temperature

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Levina

Glover

et al. 2016

J Synchrotron Radiat

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The design and operation of a low-volume spectroelectrochemical cell for X-ray absorption spectroscopy (XAS) of solutions at room temperature is described. Fluorescence XAS measurements are obtained from samples contained in the void space of a 50 µL reticulated vitreous carbon (sponge) working electrode. Both rapid electrosynthesis and control of the effects of photoreduction are achieved by control over the flow properties of the solution through the working electrode, where a good balance between the rate of consumption of sample and the minimization of decomposition was obtained by pulsing the flow of the solution by 1-2 µL with duty cycle of ∼3 s while maintaining a small net flow rate (26-100 µL h(-1)). The performance of the cell in terms of control of the redox state of the sample and minimization of the effects of photoreduction was demonstrated by XAS measurements of aqueous solutions of the photosensitive Fe(III) species, [Fe(C2O4)3](3-), together with that of the electrogenerated [Fe(C2O4)3](4-) product. The current response from the cell during the collection of XAS spectra provides an independent measure of the stability of the sample of the measurement. The suitability of the approach for the study of small volumes of mM concentrations of protein samples was demonstrated by the measurement of the oxidized and electrochemically reduced forms of cytochrome c.

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Section: Resultsmentioning

confidence: 99%