Identification of double four-ring units in germanosilicate ITQ-13 zeolite by solid-state NMR spectroscopy
文献类型：期刊论文
| 作者 | Liu, Xiaolong; Deng, Feng; Xu, Jun; Wang, Chao; Wang, Weiyu; Wang, Qiang; Chu, Yueying |
| 刊名 | SOLID STATE NUCLEAR MAGNETIC RESONANCE
 |
| 出版日期 | 2017-10-01 |
| 卷号 | 87页码:1-9 |
| 关键词 | Germanosilicate Zeolites Solid State Synthesis Double Four Ring Solid State Nmr Spectroscopy |
| DOI | 10.1016/j.ssnmr.2017.05.002 |
| 文献子类 | Article |
| 英文摘要 | Well-crystallized Ge-free and Ge-ITQ-13 were successfully obtained by solid state synthesis method. The Ge/Si ratio and the water content that are the two important factors in the synthesis of germanosilicate zeolites were explored for the formation of ITQ-13. The effect of the mineralizing agents (NH4F and NH4Cl) on the ITQ-13 synthesis was investigated as well. The obtained pure silica ITQ-13 and Ge-ITQ-13 were characterized by one- and two-dimensional solid-state NMR techniques. One-dimensional (1D) F-19 MAS, H-1 -> Si-29 CP/MAS and F-19 -> Si-29 CP/MAS NMR spectroscopy evidenced the formation of pure Si-D4R (double four ring) and Ge-D4R units, with the latter being generated by substitution of Si atom from the former units. The detailed configurations of the Ge-D4R units in ITQ-13 was revealed by two-dimensional (2D) Si-29{F-19} HETCOR NMR spectroscopy. With the help of theoretical calculations on the F-19 and Si-29 NMR chemical shifts, six types of D4R units were determined. The formation of the specific D4R unit confirms the structural directing roles of Ge atom and F ions in the formation of the D4R units in zeolite framework. The identification of the SiOSi bonds in the D4R units that connects the layers of ITQ-13 framework provided rationale for the high stability of the ITQ-13 in the degermanation treatment. |
| WOS关键词 | SOLVENT-FREE SYNTHESIS ; CATALYTIC BEHAVIOR ; RING PORES ; FRAMEWORK ; ITH ; GE |
| WOS研究方向 | Chemistry ; Physics ; Spectroscopy |
| 语种 | 英语 |
| WOS记录号 | WOS:000415816200001 |
| 资助机构 | National Natural Foundation of China(21303253 ; National Natural Foundation of China(21303253 ; 21473246 ; 21473246 ; 21403290 ; 21403290 ; 21622311) ; 21622311) ; National Natural Foundation of China(21303253 ; National Natural Foundation of China(21303253 ; 21473246 ; 21473246 ; 21403290 ; 21403290 ; 21622311) ; 21622311) |
| 源URL | [http://ir.wipm.ac.cn/handle/112942/11548]  |
| 专题 | 武汉物理与数学研究所_磁共振应用研究部 |
| 作者单位 | Chinese Acad Sci, Natl Ctr Magnet Resonance Wuhan, State Key Lab Magnet Resonance & Atom & Mol Phys, Wuhan 430071, Hubei, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, Xiaolong,Deng, Feng,Xu, Jun,et al. Identification of double four-ring units in germanosilicate ITQ-13 zeolite by solid-state NMR spectroscopy[J]. SOLID STATE NUCLEAR MAGNETIC RESONANCE,2017,87:1-9. |
| APA | Liu, Xiaolong.,Deng, Feng.,Xu, Jun.,Wang, Chao.,Wang, Weiyu.,...&Chu, Yueying.(2017).Identification of double four-ring units in germanosilicate ITQ-13 zeolite by solid-state NMR spectroscopy.SOLID STATE NUCLEAR MAGNETIC RESONANCE,87,1-9. |
| MLA | Liu, Xiaolong,et al."Identification of double four-ring units in germanosilicate ITQ-13 zeolite by solid-state NMR spectroscopy".SOLID STATE NUCLEAR MAGNETIC RESONANCE 87(2017):1-9. |
入库方式： OAI收割
来源：武汉物理与数学研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。