摘要
利用密度泛函理论(DFT)方法,在B3LYP/Lan12dz水平下,对原子簇Mn2B2的十几种可能构型进行全参数优化计算和频率验证,获得3种单重态稳定构型,5种三重态稳定构型。利用这些构型,对其能量、键级、电子以及催化性质进行了分析。结果表明:(1)在原子簇Mn2B2各构型中,构型1(3)的稳定性最高。(2)对原子簇Mn2B2的稳定性做出主要贡献的是Mn-B键。(3)在Mn2B2团簇中各原子所带电荷受多重度的影响较大,Mn原子主要作为给电子体,带正电荷。(4)在原子簇Mn2B2所有构型中,Mn原子轨道在HU-MO和LUMO轨道中有较多贡献,很可能是潜在的催化活性中心。
By using the method of Density Functional Theory(DFT),under the level of B3LYP/Lan12dz,three singlet stable configurations and five triplet stable configurations are obtained by fully optimized calculation and frequency verification.The energy,bond order,electronic and catalytic property are analyzed,the results show that: Firstly,the configuration 1(3) is the most stable in cluster Mn2B2.Secondly,the main contribution to the stability of cluster Mn2B2 is Mn-B bond.Thirdly,in clusters Mn2B2,the multiplicity has more impact on the other charges of atom,as well as Mn atom with a positive charge serves as an electronic donor.Finally,Mn atom orbit makes more contributions to HUMO and LUMO orbit,which may be a catalytic activity center.
出处
《辽宁科技大学学报》
CAS
2013年第1期5-10,24,共7页
Journal of University of Science and Technology Liaoning
基金
2012年辽宁省大学生创新创业计划项目
国家自然科学基金资助项目(50774044)
辽宁省教育科学"十二五"规划立项课题(JG11DB140)
辽宁省高等教育本科教学改革研究项目