Solid State NMR Techniques Study the Structural Characteristics of As-Synthesized ITQ-33
文献类型：期刊论文
| 作者 | Liu, Xiaolong1; Zhang, Zhanpei1,2; Guo, Youmin2 |
| 刊名 | JOURNAL OF PHYSICAL CHEMISTRY C
 |
| 出版日期 | 2017-06-01 |
| 卷号 | 121期号:21页码:11568-11575 |
| DOI | 10.1021/acs.jpcc.7b02968 |
| 文献子类 | Article |
| 英文摘要 | Multinuclear solid state NMR techniques have been applied to study the structural characteristics of extra-large-pore zeolite ITQ-33. Through analysis of 2D Si-29{F-19} HETCOR NMR spectra, the configurations of Ge-D4R units in ITQ-33 can be confirmed to have the most separation between Si and Ge atoms. Because F anions are not in the center of D4R units for shorter Ge-F bond lengths and Ge-D4R units with Ge F bonds in the crystals are related by mirror symmetries, Si-29 NMR signals of D4R units are magnetically inequivalent, therefore two Si-29 peaks are observed in F-19-Si-29 CP/MAS and F-19-Si-29 HETCOR spectra. The formation of specific D4R configurations proves that Ge atoms and F- anions play important structural directing roles in the formation process of zeolite ITQ-33. Al-27 SQMAS experimental results confirm that a major amount of Al atoms is incorporated into the 3-ring in the framework. 1D C-13-Al-27 S-RESPDOR experimental results show that Al atoms in the framework are spatially close to the methyl groups of HM2+ cations in the 18-ring channels. Therefore, it can be suggested that the delicate electrostatic balances between the negative charge centers such as F- anions in Ge-D4R units and Al atoms in 3-ring in the zeolite framework and the HM2+ cations orient the formation of ultralarge pores (18R) in zeolite ITQ-33. Our observations could be helpful in the design and synthesis of new extra-large-pore zeolites. |
| WOS关键词 | LARGE-PORE ZEOLITE ; MOLECULAR-SIEVE ; PREFERENTIAL LOCATION ; FRAMEWORK DENSITY ; HIGH-SILICA ; RING PORES ; SPECTROSCOPY ; GERMANIUM ; SPECTRA ; TOPOLOGY |
| WOS研究方向 | Chemistry ; Science & Technology - Other Topics ; Materials Science |
| 语种 | 英语 |
| WOS记录号 | WOS:000402775200061 |
| 资助机构 | National Natural Foundation of China(21303253 ; National Natural Foundation of China(21303253 ; 21673282) ; 21673282) ; National Natural Foundation of China(21303253 ; National Natural Foundation of China(21303253 ; 21673282) ; 21673282) |
| 源URL | [http://ir.wipm.ac.cn/handle/112942/11497]  |
| 专题 | 武汉物理与数学研究所_磁共振应用研究部 |
| 作者单位 | 1.Chinese Acad Sci, State Key Lab Magnet Resonance & Atom Mol Phys, Wuhan Ctr Magnet Resonance, Key Lab Magnet Resonance Biol Syst,Wuhan Inst Phy, Wuhan 430071, Peoples R China 2.Anhui Univ, Sch Phys & Mat Sci, 111 Jiulong Rd, Hefei 230601, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, Xiaolong,Zhang, Zhanpei,Guo, Youmin. Solid State NMR Techniques Study the Structural Characteristics of As-Synthesized ITQ-33[J]. JOURNAL OF PHYSICAL CHEMISTRY C,2017,121(21):11568-11575. |
| APA | Liu, Xiaolong,Zhang, Zhanpei,&Guo, Youmin.(2017).Solid State NMR Techniques Study the Structural Characteristics of As-Synthesized ITQ-33.JOURNAL OF PHYSICAL CHEMISTRY C,121(21),11568-11575. |
| MLA | Liu, Xiaolong,et al."Solid State NMR Techniques Study the Structural Characteristics of As-Synthesized ITQ-33".JOURNAL OF PHYSICAL CHEMISTRY C 121.21(2017):11568-11575. |
入库方式： OAI收割
来源：武汉物理与数学研究所
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