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题名: New Insights into the Role of Amines in the Synthesis of Molecular Sieves in Ionic Liquids
作者: Xu, Renshun1;  Zhang, Weiping1;  Guan, Jing1;  Xu, Yunpeng1;  Wang, Lei1;  Ma, Huaijun1;  Tian, Zhijian1;  Han, Xiuwen1;  Lin, Liwu1;  Bao, Xinhe1
通讯作者: 张维萍 ;  包信和
关键词: density functional calculations ;  ionic liquids ;  molecular sieves ;  NMR spectroscopy ;  synthesis mechanisms
刊名: CHEMISTRY-A EUROPEAN JOURNAL
发表日期: 2009
DOI: 10.1002/chem.200802590
卷: 15, 期:21, 页:5348-5354
收录类别: SCI
文章类型: Article
部门归属: 5
项目归属: 502,802
产权排名: 1;1
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Multidisciplinary
研究领域[WOS]: Chemistry
英文摘要: A combination of state-of-the art in situ one- and two-dimensional NMR spectroscopy and density functional theory (DFT) calculations have been employed for the first time to investigate the role of amines in the synthesis of aluminophosphate molecular sieves in ionic liquids (ILs). In situ rotating-frame nuclear Overhauser effect spectroscopy (ROESY) was used to demonstrate that the hybrid of imidazolium ionic liquids with organic amines, such as morpholine, connected through a hydrogen bond can be formed in the gel during the crystallization of molecular sieves. By combining the characterizations of the final solid products obtained by using XRD analyses, solid-state NMR spectroscopy, thermogravimetric analysis, and DFT calculation results, it was verified that the hybrid between morpholine and the imidazolium cation in the initial preparation stage can act as the structure-directing agent (SDA) for the synthesis of AFI-structured aluminophosphate molecular sieves. Our findings may suggest a synthesis mechanism of molecular sieves in ionic liquids in which the IL-organic amine hybrid is required in the nucleation step, whereas the crystal growth occurs through the occlusion of ionic liquids in the zeolite channels.
关键词[WOS]: STRUCTURE-DIRECTING AGENTS ;  IN-SITU NMR ;  IONOTHERMAL SYNTHESIS ;  HYDROTHERMAL SYNTHESIS ;  MICROPOROUS MATERIALS ;  REACTION-MECHANISM ;  ZEOLITES ;  TEMPLATE ;  ALUMINOPHOSPHATE ;  FRAMEWORK
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000266419600022
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/102273
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China

Recommended Citation:
Xu, Renshun,Zhang, Weiping,Guan, Jing,et al. New Insights into the Role of Amines in the Synthesis of Molecular Sieves in Ionic Liquids[J]. CHEMISTRY-A EUROPEAN JOURNAL,2009,15(21):5348-5354.
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