Journal of Non-Crystalline Solids ( IF 3.5 ) Pub Date : 2020-07-09 , DOI: 10.1016/j.jnoncrysol.2020.120280 Tongyao Zhao , Xuyang Zhang , Jinjun Ren
A series of glasses with the compositions of 10NaF-(90-x) NaPO3-xYF3 (x = 5, 10, 15 and 20 mol%) were prepared via the conventional melt-quenching method. The structures of these glasses were characterized by multiple advanced solid-state nuclear magnetic resonance (SSNMR) techniques. Multiple phosphorus species QmnY were resolved at atomic level. Here, the value m and n denote the number of P–O–P bonds and the number of Y3+ ion bounding to phosphorus oxygen tetrahedron, respectively, which were identified by two dimensional (2D) J-resolved spectroscopy. 19F MAS spectra, 19F↔23Na and 19F↔31P rotational echo double resonance (REDOR) prove that F−ions are involved into the glass networks through Y-F•••Na and P-F•••Na linkages. The 31P {19F} J-coupling based heteronuclear multiple quantum coherence (J-HMQC) spectrum proves that F− ions selectively connect with Q1 species. F− ions show significant preference to connecting with Y3+ over P5+.
中文翻译:
固态核磁共振技术研究稀土掺杂的氟磷酸盐玻璃的结构
通过常规的熔融淬火方法制备了一系列具有10NaF-(90-x)NaPO 3 -xYF 3(x=5、10、15和20mol%)组成的玻璃。这些玻璃的结构通过多种先进的固态核磁共振(SSNMR)技术进行了表征。在原子水平上解析了多种磷物质Q m nY。此处,m和n分别表示通过二维(2D)J解析光谱确定的与磷氧四面体键合的P–O–P键数和Y 3+离子数。19 ˚FMAS光谱,19 F↔ 23 Na和19 F↔ 31 P旋转回波双共振(REDOR)证明˚F -离子参与到通过YF•••Na和PF•••娜键的玻璃网络。的31 p { 19 F} Ĵ -耦合基于异核多量子相干(Ĵ -HMQC)光谱证明˚F -离子选择性具有Q连接1种。˚F -离子显示显著偏好为Y连接3+用P 5+。