3rd Workshop on the Simultaneous Combination of Spectroscopies with X-ray Absorption, Scattering and Diffraction Techniques

Session

Materials & Time Resolution Session

TR1

4 Jul 2012, 15:50

Auditorium HG E 3 (<a href="http://www.ethz.ch/index_EN">ETH Zurich</a>)

37. Modulation Excitation Spectroscopy applied to Crystallography

Dr Wouter van Beek (SNBL at ESRF)

04/07/2012, 15:50

Invited oral contribution

This presentation will focus on our recent methodological developments. Periodic external stimulations such as concentration light flux, pressure and temperature were introduced. Periodic perturbations are already used frequently in spectroscopic investigations because they enhance the sensitivity and introduce selectivity into experiments. This technique has been called Modulation Excitation...

40. Combined, Modulation Enhanced X-ray Powder Diffraction and Raman Spectroscopic Study of Structural Transitions in the Spin Crossover Material [Fe(Htrz)(trz)](BF)

Dr Marco Milanesio Milanesio (Universita' Piemonte Orientale)

04/07/2012, 16:20

Materials / Nanomaterials

Invited oral contribution

The structure of [Fe(Htrz)2(trz)]BF4 (1, Htrz )1,2,4-4-H-triazole, trz ) 1,2,4-triazolate) at the low-spin (LS) and high-spin (HS) states and structural transitions between the two states were investigated by in situ high- resolution synchrotron X-ray powder diffraction (XRPD) combined with Raman spectroscopy using a modulation-enhanced technique. The differences in the behavior of the spin...

47. Modulation excitation spectroscopy coupled with synchrotron X-ray methods to unravel dynamic processes on supported Pd catalysts

Dr Davide Ferri (Empa), Dr GIan Luca Chiarello (Empa)

04/07/2012, 16:50

Catalysis

Oral contribution

Automotive catalysts operate under fast transients and periodic reaction conditions that are challenging to reproduce for mechanistic studies. Improved data evaluation is required to separate the contribution of dynamic species from that of typically overwhelming static signals. This is achieved by a demodulation technique that has been applied to synchrotron techniques in an effort to capture...

52. Probing the structure of proteins in physiological conditions by X-ray absorption and UV/Visible spectroscopies

Ms Mahsa Silatani (École Polytechnique Federal de Lausanne)

04/07/2012, 17:10

Biological / Pharmaceutical Research

Oral contribution

Myoglobin (Mb) is one of the best-characterized metalloproteins found in mammalian muscle cells, which facilitates oxygen diffusion in muscle cells. It has the ability to bind small ligand molecules to the Fe atom at the center of its heme plane. Despite extensive studies, a microscopic description of ligand detachment and rebinding in Mb remains unclear. X-ray absorption spectroscopy (XAS) is...

42. Time-resolved X-ray absorption studies on charge carrier dynamics in aqueous TiO2 nanoparticles

Mrs Mercedes Hannelore Rittmann-Frank (Ecole Polytechnique Fedrale de Lausanne)

04/07/2012, 17:30

Materials / Nanomaterials

Oral contribution

Significant effort has been put into understanding electron/hole dynamics in electronically excited TiO2 nanoparticles (NPs) and how the kinetics of the charge carriers are affected by changes in the electronic and structural properties of such systems. This is necessary in order to understand the underlying mechanisms occurring in photocatalysis and in dye-sensitized solar cells, for which...