Coordination of niobium and tantalum oxides by Ar, Xe and O2: Matrix isolation infrared spectroscopic and theoretical study of NbO2(Ng)2 (Ng=Ar, Xe) and MO4(X) (M=Nb, Ta; X=Ar, Xe, O2) in solid argon
作者:Yanying Zhao、Xuming Zheng、Mingfei Zhou
DOI:10.1016/j.chemphys.2008.03.026
日期:2008.7
which are coordinated by one argon atom in solid argon matrix. The coordinated Ar atom in MO4(Ar) can be replaced by O2 or Xe in forming the MO6 and MO4(Xe) complexes. The results indicate that the NbO2, NbO4 and TaO4 molecules trapped in solid noble gas matrixes should be regarded as the NbO2(Ng)2 and MO4(Ng) (Ng = Ar, Xe; M = Nb, Ta) complexes instead of “isolated” metal oxide species.
基质隔离红外光谱和量子化学计算结果的结合表明,NbO 2分子在固体稀有气体基质中形成NbO 2(Ng)2(Ng = Ar,Xe)配合物时,由两个稀有气体原子协调。相反,TaO 2分子不能形成类似的稀有气体络合物。铌和二氧化钽还与双氧反应形成侧键结合的超氧二氧化物配合物MO 4(M = Nb,Ta),它们在固体氩气基质中被一个氩原子配位。在形成MO 6和MO 4时,MO 4(Ar)中配位的Ar原子可被O 2或Xe取代(Xe)配合物。结果表明,应将捕集在固体稀有气体基质中的NbO 2,NbO 4和TaO 4分子视为NbO 2(Ng)2和MO 4(Ng)(Ng = Ar,Xe; M = Nb,Ta)配合物而不是“分离的”金属氧化物。