采用密度泛函理论(DFT)的B3LYP方法,在6-31G(d)水平上对BmNn(m+n≤5)团簇及其阴离子的几何构型、电子结构和振动光谱等性质进行了理论研究.并在相同水平下计算了BmNnˉ(/m+n≤5)的垂直电离能和BmNn(m+n≤5)的绝热电子亲和势.结果表明:BmNnˉ(m+n≤5)团簇的基态构型中,BN、B2N、B3N、B2 N3和B3N:为线形结构,其余均为平面结构;BmNnˉ(m+n≤5)团簇的基态构型中,BN3ˉ、B2N3ˉ、BN4ˉ和B4Nˉ为平面结构,其余均为线形结构.
The geometries, electronic states and vibrational frequencies of BmNn (m + n≤ 5) neutral and anionic clusters have been investigated by using B3LYP method of the density functionnal theory (DFF) at the level of 6- 31 G (d). Moreover, the vertrical detachment of Bm Nnˉ ( m + n ≤5 ) and the adiabatic electron affinities of Bm Nn ( m + n ≤5 ) are discussed at the same level. The results show that the ground state structure of BmNn ( m + n≤ˉ5 ) clusters are planar except BN,B2N,B3N,B2N3 and B3N2 clusters due to linetype. For BmNnˉ (m + n ≤ˉ5 ) clusters,the ground state structures of BN3ˉ ,B2N3ˉ ,BN4ˉ and B4Nˉ are planar,while the other clusters are linear.