Excited-state dynamics of carotenoids in light-harvesting complexes. 1. Exploring the relationship between the S(sub 1) and S(super *) states

Article Abstract:

Excitation-intensity-dependent pump-probe (PP) measurements have helped in gaining insight into the light-induced dynamics of the light-harvesting 2 (LH2) complex isolated from Rhodopseudomonas acidophila. The S(super *) state has exhibited a different response to the increase of excitation intensity than S(sub 1) state and hence two new models that can describe both the time-resolved and the intensity-dependent data are proposed.

Carotenoids, Excited state chemistry

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Pressure-driven phase transitions in NaB[H.sub.4]: theory and experiments

Article Abstract:

Several theoretical and experimental studies are conducted to study the pressure-driven phase transitions in Na[BH.sub.4]. The calculations confirm that the cubic phaseremains stable up to 5.4 GPa and an orthorhombic phase occurs above 8.9 GPa.

Analysis, Observations, Molecular dynamics, X-rays, X-ray diffraction, Binding energy, Mechanical properties, Structure

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Synthesis of lead chalcogenide nanocrystals by sequential ion implantation in silica

Article Abstract:

Lead chalcogenide nanocrystals were synthesized by sequential implantation of Pb and one of the chalcogen species into pure silica. PbS nanocrystal-doped silica is shown to emit intense photoluminescence in the 1.5-2 Mum wavelength range.

Lead compounds, Photoluminescence

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