Gas-phase copper/selenium and silver/selenium clusters

• Published in: Chemistry of materials Vol. 5; no. 8; pp. 1085 - 1088
• Main Authors: Yamada, Y, Deng, H. T, Castleman, A. W
• Format: Journal Article
• Language: English
• Published: Washington, DC American Chemical Society 01.08.1993
• Subjects: 400201 - Chemical & Physicochemical Properties; ATOMIC CLUSTERS; CATIONS; CHARGED PARTICLES; Clusters, nanoparticles, and nanocrystalline materials; Condensed matter: structure, mechanical and thermal properties; COPPER COMPOUNDS; Exact sciences and technology; Fullerenes and fullerene-related materials; INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; IONS; MASS SPECTROSCOPY; MOLECULAR STRUCTURE; Physics; SELENIUM COMPOUNDS; SILVER COMPOUNDS; SPECTROSCOPY; STOICHIOMETRY; Structure of solids and liquids; crystallography; TRANSITION ELEMENT COMPOUNDS; Cationic complex; Inorganic compounds; Transition element complexes; Ionic cluster; Time-of-flight method; Mass spectroscopy; Crystal growth from vapors; Experimental study; Seleno complex; Solid clusters; Electronic structure; Magic number; Silver complexes; Atomic clusters; Copper complexes; Crystal structure
• ISSN: 0897-4756; 1520-5002
• DOI: 10.1021/cm00032a010

Binary clusters Cu sub n Se sub m exp + and Ag sub n Se sub m exp + are produced by a gas aggregation source and investigated by time-of-flight mass spectrometry following ionization with a KrF excimer laser. Dominant species in the mass spectra are assigned as (M sub 2 Se) sub n exp + and M(M sub 2 Se) sub n exp + (M = copper or silver), which reflect stable compositions of neutral precursors and charged clusters. In these series, magic numbers appear at n = 6. Additionally, especially prominent peaks are observed for M sub n Se sub m exp + ; (n,m) = (7,4), (9,5), and (11,6). From an investigation of the magic numbers and prominent abundances of various species, it is suggested that these binary clusters have structures related to an antifluorite structure.