title: Structure and vibrations of AlnNn (n = 3-9) clusters.
abstract: The structure and harmonic vibrations of Al(n)N(n) (n = 3-9) clusters have been investigated using the B3LYP (Becke 3-parameter-Lee-Yang-Parr) density functional theory. All structures are found to be cumulenic D(nh) rings (equal bonds, alternating angles), with one intense out-of-plane mode and three infrared-active degenerate modes, of which the highest one is extremely intense and asymptotically increases to 1217 cm(-1) for n = 9. Comparisons with C2n clusters and B(n)N(n) clusters, the structure and bonding type for the Al(n)N(n) clusters are consistent with those of the C2n (n = 3, 5, 7, ...) clusters and the B(n)N(n) clusters.
authors.affiliation: Key Laboratory of Liquid Structure and Heredity of Materials, Ministry of Education, Shandong University, Shandong, Jinan 250100, PR China. qyh88@eyou.com
authors.forename: Yuhui
authors.initials: Y
authors.lastname: Qu
authors.forename: Xiufang
authors.initials: X
authors.lastname: Bian
mesh_terms: D017607:Aluminum Compounds / Q000737:chemistry*; D008968:Molecular Conformation; D015394:Molecular Structure; D009566:Nitrates / Q000737:chemistry*; D016011:Normal Distribution; D012984:Software; D013053:Spectrophotometry / Q000379:methods*
chemical_list: D017607:Aluminum Compounds; D009566:Nitrates; C052045:aluminum nitride; C050609:aluminum nitrate