A β-aminoacid ester was successfully derivatized to yield to 4H-1,2-4-triazol-4-yl-propionate (βAlatrz) which served as a neutral bidentate ligand in the 1D coordination polymer [Fe(βAlatrz)(3)](CF(3)SO(3))(2)·0.5H(2)O (1·0.5H(2)O). The temperature dependence of the high-spin molar fraction derived from (57)Fe Mossbauer spectroscopy recorded on cooling below room temperature reveals an exceptio...

Silicon micromachined calorimeters ("calorimeter on a chip") are used to measure heat capacities and phase transition enthalpies for thin film, single crystal, and powder samples (5-500 mug). The technology is thus compatible with the small samples produced in multianvil and large diamond anvil cells. Techniques for handling small samples and attaching them to the calorimetric devices have been...

This paper reviewed different analytical techniques to determine concentrations of the environmentally-friendly oxidant ferrate(VI) (Fe(VI)O(2-)(4), Fe(VI)) anion in solid and solution samples. The techniques included volumetric (chromite and arsenite), electrochemical (cyclic voltammetry and potentiometry), and spectrophotometric methods (Fourier transform infrared, Mossbauer, UV-Visible, 2,2-...

Matrix isolation techniques have been used in conjunction with Mossbauer spectroscopy to study europium atoms and clusters in solid argon. The measured isomer shift for Eu' monomers in argon was -6.1 mms-'. A value of 13 i: 2 lO-'fm* for the change in the mean square radius (A(?)) was calculated from the isomer shifts of Eu' and EuZ+S04. It was observed that the electron density at the lslEu nu...

— Iron 57-enriched, deoxygenated human (adult) hemoglobin (HbA), its isolated asHand /?sn-chains, and the partially iron 57-enriched, fully functional hemoglobin a2(Fe) j82(Fe) were investigated by Mossbauer spectroscopy in the temperature range 4.2 K-200 K. According to our experimental accuracy ( ± 0.006 mm s) the temperature dependent quadrupole splittings &EQ(T) of deoxygenated HbA, <XSHand...

Recently Raghavan [1] has proposed to measure the gravitational red shift of the electron anti-neutrino and the neutrino mixing angle θ13 using a tritium-metal matrix source and He-metal matrix target. The line width of the tritium source and capture cross-section in He are enhanced by a combined factor of ∼ 10 via the Mossbauer effect. We show how this technique can be used to directly measure...

Abstract We present the magnetic, structural and 57 Fe Mossbauer characterization of soils collected from an ancient mercury contaminated city named Huancavelica in Peru. The results indicate that silicates carbonates are main mineralogical constituents samples. In addition, Mössbauer spectra at room temperature reveal, presence two components: a magnetic component related to Fe-oxides (magneti...