Li C, Xiong G, Xin Q, Liu Jk, Ying Pl, Feng Zc, Li J, Yang Wb, Wang Yz, Wang Gr, Liu Xy, Lin M, Wang Xq, Min Ez
State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023 (China).
Angew Chem Int Ed Engl. 1999 Aug;38(15):2220-2222.
Framework titanium atoms in titanium-substituted silicalite (TS-1) can be identified by UV resonance Raman spectroscopy since the associated Raman bands at 1125, 530, and 490 cm(-1) (see figure) are observed only when the charge transfer transition associated with the framework Ti atoms is excited by a UV laser. Thus, framework Ti atoms can be distinguished from nonframework Ti atoms and other defect sites. This method can be applicable to identifying transition metal atoms in the frameworks of other molecular sieves.
钛取代硅沸石（TS-1）中的骨架钛原子可以通过紫外共振拉曼光谱法来识别，因为只有当与骨架钛原子相关的电荷转移跃迁被紫外激光激发时，才会观察到位于1125、530和490 cm⁻¹处的相关拉曼谱带（见图）。因此，骨架钛原子可以与非骨架钛原子及其他缺陷位点区分开来。该方法可适用于识别其他分子筛骨架中的过渡金属原子。
