Electron－rich Polynuclear Transition Metal Clusters：Ⅰ． The Clusters with Chalcogen Bridges and Phosphine Ligands

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ChemInform Abstract: Structures of Silicon-Doped Carbon Clusters.

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.     

ChemInform Abstract: Polyhedral Skeletal Electron Pair Theory (PSEPT) of Bare Clusters. Part 1. Small Silicon Clusters.

A number of structures previously proposed as candidates for stable structures of a cluster of given nuclearity are ruled out by application of the PSEPT approach.     

ChemInform Abstract: C61 Clusters: AM1 Computations.

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.     

ChemInform Abstract: Local Density Functional Study of Copper Clusters: A Comparison Between Real Clusters,Model Surface Clusters,and the Actual Metal Surface.

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.     

ChemInform Abstract: Stable,Free, Dianionic Silicon-Carbon Clusters.

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.     

ChemInform Abstract: Reactions of Sodium Clusters with Oxygen Molecules.

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.     

A New Many-Body Expansion Scheme for Atomic Clusters: Application to Nitrogen Clusters

Although the many-body expansion (MBE) approach is widely applied to estimate the energy of large systems containing weak interactions, it is inapplicable to calculating the energies of covalent or metal clusters. In this work, we propose an interaction many-body expansion (IMBE) to calculate the energy of atomic clusters containing covalent bonds. In this approach, the energy of a system is expressed as the sum of the energy of atoms and the interaction energy between the atom and its surrounding atoms. The IMBE method is first applied to calculate the energies of nitrogen clusters, in which the interatomic interactions are truncated to four-body terms. The results show that the IMBE approach could significantly reduce the energy error for nitrogen clusters compared with the traditional MBE method. The weak size and structure dependence of the IMBE error with respect to DFT calculations indicates the IMBE method has good potential application in estimating energy of large covalent systems.     

ChemInform Abstract: Clusters of Aluminum,a Density Functional Study.

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.     

Particle formation: Clusters and nuclei

The study of fine particles is a growing area of interest in both the academic and industrial communities. Through investigation of the formation and properties of clusters one can elucidate mechanisms of nucleation and investigate the changing properties of matter as it transcends from gas-like through surface dominated and ultimately to bulk state behavior. This paper provides an overview of the importance of the field and shows examples of how research on small clusters is providing insight into diverse phenomena such as nucleation, changing electronic properties with cluster size, and concomitant influences on reactions.     

Excited Semiconductor Clusters: Magic Source

In this paper, we review the preparation and properties of CdS-like clusters as well as their important applications in several nanostructures. The clusters created by the reaction of S^2? ions generated by the decomposition of thioglycolic acid (TGA) and Cd²⁺ ions play important roles for the construction of novel nanocrystals (NCs), the assembly of the NCs, and the formation of nanostructures including 1D solid and tubal fibers, 2D dendritic morphology, and 3D crystals. The formation and property of the clusters depended strongly on the molar ratio of TGA and Cd²⁺ ions in solutions. When aqueous CdTe NCs coated with a hybrid SiO₂ shell containing the clusters, they revealed a drastic increase in photoluminescence (PL) efficiency (from 28 to 80 %) and temperature-dependent PL. These excellent PL properties were ascribed to the clusters very closed to CdTe cores. This is confirmed through the observation of a lengthening of the Auger recombination lifetime by a factor of ~3.5 in the presence of the clusters. The size of the clusters determined the PL properties of the hybrid SiO₂-coated NCs and those fibers. Because of their high PL, these biofunctional materials could provide a platform for various applications.     

ChemInform Abstract: Photoionization Spectra of Cesium and Cesium Oxide Clusters.

Seven cesium and 86 oxidized cesium clusters, CsnOm (0 < m < n; n = 3-14), are ionized in a one-photon process by means of a tunable cw dye laser and detected in a mass spectrometer.