Transient processes in photogalvanic cells: Part II. The ru (bipy)32+/Fe3+ cell

The transient processes in photogalvanic cells using the ^*Ru(bipy)₃²⁺+Fe³⁺→Ru(bipy)₃³⁺+Fe²⁺ system are investigated by measurement of the current-time and the potential-time characteristics. Under conditions of high light intensity and low to medium workloads of the cell, a pronounced maximum in the voltage-time curve is observed. This maximum appears after some milliseconds and it amounts to four times the stationary value. The experimental results are explained and the transients simulated, using the theoretical model developed in Part I of this series.     

Synthesis and Conformation of (5R,8R,10R)-8-(Methylthiomethyl)ergoline-6-carboxamidine

The title compound 7 and two related novel ergolines have been synthesised from (5R,8R,10R)-8-(methyl-thiomethyl)ergoline-6-carbonitrile ( 4 ). The guanidine function of 7 induces a boat conformation of ergoline-ring D, as demonstrated by a careful NMR spectroscopic analysis of 7 and its N-hydroxy congener 6 . Diphenylphosphinodithioic acid has been used to convert the cyanamide function of 4 into the thiourea function at (5R,8R,10R)-8-(methylthiomethyl)ergoline-6-thiocarboxamide ( 5 ).     

Quantitative Rietveld texture analysis of CaSiO(3) perovskite deformed in a diamond anvil cell

The Rietveld method is used to extract quantitative texture information from a single synchrotron diffraction image of a CaSiO(3) perovskite sample deformed in axial compression in a diamond anvil cell. The image used for analysis was taken in radial geometry at 49?GPa and room temperature. We obtain a preferred orientation of {100} lattice planes oriented perpendicular to the compression direction and this is compatible with [Formula: see text] slip.