Multinuclear Solid-State NMR Studies on the Formation Mechanism of Aluminophosphate Molecular Sieves in Ionic Liquids

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	Multinuclear Solid-State NMR Studies on the Formation Mechanism of Aluminophosphate Molecular Sieves in Ionic Liquids
	Xu, Renshun 1; Zhang, Weiping 2; Xu, Jun 3; Tian, Zhijian 1; Deng, Feng 3; Han, Xiuwen 1; Bao, Xinhe 1
刊名	JOURNAL OF PHYSICAL CHEMISTRY C
	2013-03-21
卷号	117 期号:11 页码:5848-5854
英文摘要	In the present work, multinuclear solid-state NMR techniques together with power X-ray diffraction (XRD) and scanning electron microscopy (SEM) were employed to monitor the crystallization process of aluminophosphate AlPO4-11 molecular sieves in 1-ethyl-3-methylimidazolium bromide ([emim]Br) ionic liquids (LLs). The local environments of the selected solid samples were probed by one-dimensional Al-27, P-31, and F-19 MAS NMR experiments, and more information was obtained from two-dimensional Al-27 -> P-31 heteronuclear correlation (HETCOR) and Al-27 triple-quantum MAS (3QMAS) experiments. It is found that a large amount of amorphous aluminophosphates was formed with the F-Al-oct-O-P-par and Al-tet-O-P-par structures in the initial stage of aging. With increasing crystallization time, the partially condensed framework phosphorus species disappeared gradually and became fully condensed. Meanwhile, the octahedral Al was transformed into the pentahedra] and tetrahedral Al species with the structures of F-Al-penta-O-P-ful and Al-tet-O-P-ful in the AlPO4-11 frameworks. During the crystallization process, [emim] cations acting as the structure-directing agents were occluded into the channels, and F- anions were connected with pentahedral Al in the final AlPO4-11 phase. All of these findings can allow proposing a possible formation mechanism for the synthesis of AlPO4-11 in ionic liquids.
WOS标题词	Science & Technology ; Physical Sciences ; Technology
类目[WOS]	Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary
研究领域[WOS]	Chemistry ; Science & Technology - Other Topics ; Materials Science
关键词[WOS]	IONOTHERMAL SYNTHESIS ; ZEOLITE ; FRAMEWORKS ; SPECTROSCOPY ; INSIGHTS ; PHASES ; SYSTEM ; AMINES
收录类别	SCI
语种	英语
WOS记录号	WOS:000316773000039
公开日期	2015-07-14
内容类型	期刊论文
源URL	[http://ir.wipm.ac.cn/handle/112942/914]
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, Dalian Inst Chem Phys, Dalian Natl Lab Clean Energy, State Key Lab Catalysis, Dalian 116023, Peoples R China 2.Dalian Univ Technol, State Key Lab Fine Chem, Dalian 116024, Peoples R China 3.Chinese Acad Sci, State Key Lab Magnet Resonance & Atom & Mol Phys, Wuhan Ctr Magnet Resonance, Wuhan Inst Phys & Math, Wuhan 430071, Peoples R China
推荐引用方式 GB/T 7714	Xu, Renshun,Zhang, Weiping,Xu, Jun,et al. Multinuclear Solid-State NMR Studies on the Formation Mechanism of Aluminophosphate Molecular Sieves in Ionic Liquids[J]. JOURNAL OF PHYSICAL CHEMISTRY C,2013,117(11):5848-5854.
APA	Xu, Renshun.,Zhang, Weiping.,Xu, Jun.,Tian, Zhijian.,Deng, Feng.,...&Bao, Xinhe.(2013).Multinuclear Solid-State NMR Studies on the Formation Mechanism of Aluminophosphate Molecular Sieves in Ionic Liquids.JOURNAL OF PHYSICAL CHEMISTRY C,117(11),5848-5854.
MLA	Xu, Renshun,et al."Multinuclear Solid-State NMR Studies on the Formation Mechanism of Aluminophosphate Molecular Sieves in Ionic Liquids".JOURNAL OF PHYSICAL CHEMISTRY C 117.11(2013):5848-5854.