| A Novel Route to Size-Controlled Fe-MIL-88B-NH2 Metal-Organic Framework Nanocrystals. | |
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MedLine Citation:
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PMID: 22053750 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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A new approach for the synthesis of uniform metal-organic framework (MOF) nanocrystals with controlled- sizes and aspect ratios has been developed using simultaneously nonionic triblock copolymer F127 and acetic acid as stabilizing and deprotonating agents, respectively. The alkylene oxide segments of the triblock copolymer can coordinate with metal ions and stabilize MOF nuclei in the early stage of the formation of MOF nanocrystals. Acetic acid can control the deprotonation of carboxylic linkers during the synthesis, and thus enables to control the rate of nucleation, leading to tailor the size and aspect ratio (length/width) of nanocrystals. Fe-MIL-88B-NH2, as iron-based MOF crystals was selected as a typical example to illustrate our approach. The results reveal that this approach is not only used for the synthesis of uniform nanocrystals but also for the control of size and aspect ratio of the materials. The size and aspect ratio of nanocrystals increases with increasing the concentration of acetic acid in the synthetic mixture. Nonionic triblock copolymers F127 and acetic acid can be easily removed from the Fe-MIL-88B-NH2 nanocrystals products by washing with ethanol, and thus their amine groups are available for practical applications. The approach is expected to synthesize various nanosized carboxylate-based MOF members such as MIL-53, MIL-89, MIL-100, and MIL-101. |
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Authors:
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Minh-Hao Pham; Gia-Thanh Vuong; Anh-Tuan Vu; Trong-On Do |
Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-11-4 |
Journal Detail:
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Title: Langmuir : the ACS journal of surfaces and colloids Volume: - ISSN: 1520-5827 ISO Abbreviation: - Publication Date: 2011 Nov |
Date Detail:
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Created Date: 2011-11-7 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9882736 Medline TA: Langmuir Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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