期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 3, 期 22, 页码 11976-11984出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5ta00476d
关键词
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资金
- Doctorate Fellowship Foundation [163020070]
- Scientific Research Foundation for Advanced Talents of Nanjing Forestry University [GXL2014035]
- Natural Science Foundation of China [31100417, 31300482]
- Jiangsu province Science Foundation for Youths, China [BK20130975, BK20130966]
- Priority Academic Program Development of Jiangsu Higher Education Institution
- Natural Science and Engineering Research Council of Canada (NSERC)
- Canada Research Chair program
- NSERC Discovery Accelerator Award
- Leading Opportunity Fund from the Canadian Foundation for Innovation
- Early Researcher Award from the Ontario Ministry of Research and Innovation
alpha-Magnesium formate [alpha-Mg-3(HCOO)(6)], a representative lightweight Mg-based metal-organic framework (MOF), has the desirable properties of permanent porosity, unique stability and adsorption capacities for small molecules. Using in situ infrared (IR) and Raman spectroscopy, we investigated the structure and stability of the alpha-Mg-3(HCOO)(6) framework at high pressures up to 13 GPa. We found that the framework structure was chemically stable under compression, while an irreversible crystal-to-crystal structural transition was observed above 2 GPa. This new phase is likely isostructural with microporous gamma-Mg-3(HCOO)(6). In contrast, the alpha-Mg-3(HCOO)(6) framework loaded with guest molecules such as dimethylformamide and benzene exhibits higher stability to external pressure. Neither a new crystalline phase nor an amorphous material was observed under pressure up to 13 GPa.
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