1,1,2,2,2,3,3,3-Octa-carbonyl-1,1,2,3-tetra-kis-(1,3,5-tri-aza-7-phosphatri-cyclo-[3.3.1.1]decane-κ)--triosmium(0).

The title compound, [Os(CHNP)(CO)], crystallizes in the ortho-rhom-bic space group with = 8. The mol-ecule consists of a triangular triosmium(0) core surrounded by eight carbonyl ligands and four 1,3,5-tri-aza-7-phosphatri-cyclo-[3.3.

Measurement Challenges in Dynamic and Nonequilibrium Nanoscale Systems.

Biological systems exhibit strikingly sophisticated properties, including adaptability, directed motion, regulation, and self-organization. Such systems are often described as being "nonequilibrium" or "out-of-equilibrium", and it can be instructive to think of them as adopting thermodynamic states that require a constant supply of energy to maintain. Despite their ubiquity, systems that demonstrate these abilities require a remarkably stringent set of chemical requirements to exist.

Asymmetric diosmium sawhorse complexes.

Three asymmetric diosmium(I) carbonyl sawhorse complexes have been prepared by microwave heating. One of these complexes is of the type Os(μ-OCR)(μ-OCR')(CO)L, with two different bridging carboxylate ligands, while the other two complexes are of the type Os(μ-OCR)(CO)L, with one axial CO ligand and one axial phosphane ligand. The mixed carboxylate complex Os(μ-acetate)(μ-propionate)(CO)[P(p-tolyl)], (1), was prepared by heating Os(CO) with a mixture of acetic and propionic acids, isolating Os(μ-acetate)(μ-propionate)(CO), and then replacing two CO ligands with two phosphane ligands.

Controlling the Morphology of Au-Pd Heterodimer Nanoparticles by Surface Ligands.

Controlling the morphology of noble-metal nanoparticles is mandatory to tune specific properties such as catalytic and optical behavior. Heterodimers consisting of two noble metals have been synthesized, so far mostly in aqueous media using selective surfactants or chemical etching strategies. We report a facile synthesis for Au@Pd and Pd@Au heterodimer nanoparticles (NPs) with morphologies ranging from segregated domains (heteroparticles) to core-shell structures by applying a seed-mediated growth process with Au and Pd seed nanoparticles in 1-octadecene (ODE), which is a high-boiling organic solvent.

Polycrystallinity of Lithographically Fabricated Plasmonic Nanostructures Dominates Their Acoustic Vibrational Damping.

The study of acoustic vibrations in nanoparticles provides unique and unparalleled insight into their mechanical properties. Electron-beam lithography of nanostructures allows precise manipulation of their acoustic vibration frequencies through control of nanoscale morphology. However, the dissipation of acoustic vibrations in this important class of nanostructures has not yet been examined.