Yasushi Shibuta*, Shigeo Maruyama Department of Materials Engineering, The University of Tokyo 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan Department of Mechanical Engineering, The University of Tokyo 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan Abstract A classical multi-body potential for transition metal carbide cluster is developed in the form of the bond-order type potential function. T...

Relativistic density functional calculations have been carried out on the model cluster Au55(PH3)12Cl6 assuming a cuboctahedral or an icosahedral Au55 metal core to model the experimentally suggested cluster compound assigned as Au55[P(C6H5)3]12Cl6. Besides the overall shape of the metal core, the study focused on the unresolved issue at which sites the chlorine ligands are attached. The calcul...

The frequency dependent polarizabilities of closed-shell alkali metal clusters containing up to ten lithium, potassium, and rubidium atoms have been calculated using the linear complex polarization propagator approach in conjunction with Hartree–Fock and Kohn–Sham density functional theory. In combination with polarizabilities for C60 from a previous work [J. Chem. Phys. 123, 124312 (2005)], th...

A crystal structure of the anaerobic Ni-Fe-S carbon monoxide dehydrogenase (CODH) from Rhodospirillum rubrum has been determined to 2.8-A resolution. The CODH family, for which the R. rubrum enzyme is the prototype, catalyzes the biological oxidation of CO at an unusual Ni-Fe-S cluster called the C-cluster. The Ni-Fe-S C-cluster contains a mononuclear site and a four-metal cubane. Surprisingly,...

The discovery of young globular clusters in merging galaxies and other environments provides an opportunity to study directly the process of globular cluster formation. Empirically it appears that globular cluster formation occurs preferentially in regions in which star formation occurs at a high rate and efficiency. Further, the interstellar medium in such regions is likely to be at a higher p...

We investigate the effects of intermittent strong jets from an Active Galactic Nuclei (AGN) of a massive galaxy in the core of a cool core galaxy cluster, on the dynamics and metal distribution of the intra-cluster medium (ICM). We use a simple model for the metal distribution within the host galaxy which includes metal injection via star formation. We carry out 2D axisymmetric hydrodynamic sim...

Late-transition-metal (low-oxidation state) clusters, with p-acceptor ligands and early-transition-metal (high-oxidation state) clusters, with p-donor ligands, have been intensively studied for several decades. Apart from the fascinating structural aspects of cluster compounds and rationalization of their bonding, much motivation for their study has been driven by potential applications. It was...

One of the most important aspects of metal clusters is that they provide a window into the rather ill-defined area of chemistry that lies between isolated molecular species and solid-state compounds with extended structures. Small, cage-like clusters have been relatively well studied and are found to generally follow established rules for electron counting and isolobal relationships. Their stru...

This review presents the results of ongoing studies of the formation histories of metal-poor and metal-rich globular clusters and their host galaxies. I first discuss the strong observational evidence that the globular cluster systems of most elliptical galaxies have bimodal metallicity distributions. I then focus on new results for metal-poor and metal-rich globular cluster systems. Metalpoor ...

We present moderate-resolution Keck spectra of nine candidate globular clusters in the possible merger-remnant elliptical galaxy NGC 3610. Eight of the objects appear to be bona fide globular clusters of NGC 3610. We find that two of the clusters belong to an old metal-poor population, five to an old metal-rich population, and only one to an intermediate-age metal-rich population. The estimated...