Chemical and Thermal Stability of Isotypic Metal-Organic Frameworks: Effect of Metal Ions

被引:263
作者
Kang, In Joong [1 ,2 ]
Khan, Nazmul Abedin [1 ,2 ]
Haque, Enamul [1 ,2 ]
Jhung, Sung Hwa [1 ,2 ]
机构
[1] Kyungpook Natl Univ, Dept Chem, Taegu 702701, South Korea
[2] Kyungpook Natl Univ, Green Nano Mat Res Ctr, Taegu 702701, South Korea
关键词
chemical stability; metal-organic frameworks; oxides; thermal stability; thermochemistry; MICROPOROUS COORDINATION POLYMERS; SELECTIVE ADSORPTION; GAS-ADSORPTION; XYLENE ISOMERS; HYDROGEN; SEPARATION; MIL-53; BENZENEDICARBOXYLATE; NANOPARTICLES; TRANSITION;
D O I
10.1002/chem.201100316
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Chemical and thermal stabilities of isotypic metal-organic frameworks (MOFs) like Al-BDC (Al-benzenedicarboxylate called MIL-53-Al), Cr-BDC (MIL-53-Cr) and V-BDC (MIL-47-V), after purification to remove uncoordinated organic linkers, have been compared to understand the effect of the central metal ions on the stabilities of the porous MOF-type materials. Chemical stability to acids, bases, and water decreases in the order of Cr-BDC > Al-BDC > V-BDC, suggesting stability increases with increasing inertness of the central metal ions. However, thermal stability decreases in the order of Al-BDC > Cr-BDC > V-BDC, and this tendency may be explained by the strength of the metal-oxygen bond in common oxides like Al2O3, Cr2O3, and V2O5. In order to evaluate precisely the stability of a MOF, it is necessary to remove uncoordinated organic linkers that are located in the pores of the MOF, because a filled MOF may be more stable than the same MOF after purification.
引用
收藏
页码:6437 / 6442
页数:6
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