磷酸盐基玻璃如纯锗磷酸盐可以在适度低温下通过可承受的化学物质获得。如今,它们变得更刺激,因为它们很容易被碱掺杂,过渡金属离子,和稀土氧化物,为纳米科学应用提供预期的物理和/或化学特征。在这里,我们报告了一项实验研究,涉及以20至70摩尔%的不同浓度制备的GeO2纯锗磷酸盐玻璃样品的结构。31P魔角旋转(MAS)核磁共振(NMR)光谱已用于表征由两种不同的玻璃形成氧化物共同形成的玻璃。通过分析MASNMR谱确定每个样品中的磷酸盐物质(Qn)的组分。有趣的是,发现每个样品的31PMASNMR光谱是中间单元Q2的特征粉末图案。本文发现的Q2单元具有一个与一个锗原子键合的氧原子(非桥连),并且另外两个氧与磷酸基团(PO4)的两个磷原子键合(桥连)。结果表明,Q2分为两个单元,Q2I和Q2II,由于下一个最近邻原子提供的磷原子核的不同屏蔽。根据磷酸基团的每个结构单元的结构来解释化学位移。本文获得的结果阐明了如何探索制备的玻璃的显示结构以开发负载型催化剂的方式。的确,由于其高化学/热稳定性,所获得的共形成的锗磷酸盐玻璃可以证明是潜在纳米催化剂的有用基底。
Phosphate-based glasses such as pure germanophosphate can be achieved at moderately low temperature by means of affordable chemical substances. Nowadays, they become more stimulating because they can be easily doped with alkali, transition metal ions, and rare earth oxides to afford the anticipated physical and/or chemical features for nanoscience applications. Herein, we report an experimental study dealing with the structure of pure germanophosphate glass samples of GeO 2 prepared with different concentrations ranging from 20 up to 70 mole%. 31 P magic angle spinning (MAS) nuclear magnetic resonance (NMR) spectroscopy has been employed to characterize the co-formed glasses by two different glass-forming oxides. The components of the phosphate species ( Q n ) in each sample were determined by analyzing the MAS NMR spectra. Interestingly, 31 P MAS NMR spectrum for each sample was found to be characteristic powder patterns of the middle units Q2 . Q2 unit found herein has one oxygen atom bonded towards one germanium atom (non-bridging) and the other two oxygens are bonding towards two phosphorus atoms (bridging) of phosphate group (PO4 ). The results show that Q2 split into two units, Q2 I and Q2 II, due to different shielding of the phosphorus nucleus provided by the next nearest neighbor atoms. The chemical shift is interpreted in terms of the structure of each building unit of the phosphate group. The results obtained herein shed light on the way how to explore the revealed structure of the prepared glasses for the development of supported catalysts. Indeed, owing to their high chemical/thermal stability, the co-formed germanophosphate glasses obtained may prove as useful substrates for potential nanocatalysts.