期刊
CHEMISTRY OF MATERIALS
卷 24, 期 3, 页码 444-450出版社
AMER CHEMICAL SOC
DOI: 10.1021/cm202593h
关键词
metal-organic frameworks; coordination modulation; crystal growth; nucleation; nanocrystals
资金
- Postdoctoral National Natural Science Foundation of China [20090461043]
- Chinese Academy of science
- National Natural Science Foundation of China [20631040, 20602035, 20610102007]
- MOST of China [2006CB601103, 2006DFA42610]
Precise control over size and morphology of metal organic frameworks (MOFs) is challenging but important for extending these hybrid materials to many more advanced applications, in particular for nanotechnology and device integration. Through studying parameters for the fabrication of nanosized Dy(BTC)(H2O) MOF crystals using sodium acetate as the modulator, this paper discloses two essential parameters for miniaturizing the size of MOF crystals to the nanometer scale. One is the proper acid base environment of the reaction medium which governs deprotonation of the organic linker, and, hence, the nucleation process. The other is the use of capping groups capable of inhibiting crystallites from growing. Combining these two parameters makes it possible to control the size and change the morphology of Dy(BTC)(H2O) crystals. A mechanism based on coordination modulation together with pH adjustment is proposed for the growth of nanosized MOF crystals.
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