Exceptional chemical and thermal stability of zeolitic imidazolate frameworks
Exceptional chemical and thermal stability of zeolitic imidazolate frameworks
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DOI：
10.1073/pnas.0602439103
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发表时间：
2006-07-05
影响因子：
11.1
通讯作者：
Yaghi, Omar M.
中科院分区：
文献类型：
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作者：
Park, Kyo Sung;Ni, Zheng;Yaghi, Omar M.
通过含咪唑型键的锌(II)(ZIF-1~-4，-6~-8，-10~-11)或Co(II)(ZIF-9和-12)的共聚反应，合成了12个分子筛咪唑骨架(ZIF-1~12)。ZIF的晶体结构是基于7个不同的铝硅酸盐分子筛的网状结构：四面体的Si(AI)和桥联的O分别被过渡金属离子和咪唑键取代。此外，还报道了一个基于石榴石的锌(II)和铟(III)(ZIF-5)的混配咪唑酸盐的例子。对ZIF-8和ZIF-11两个典型分子的气体吸附、热稳定性和化学稳定性的研究表明，它们的永久孔隙率(朗缪尔比表面积=1,810 m(2)/g)、高热稳定性(高达550℃)以及对沸腾的碱性水和有机溶剂具有显著的耐化学性。
Twelve zeolitic imidazolate frameworks (ZIFs; termed ZIF-1 to -12) have been synthesized as crystals by copolymerization of either Zn(II) (ZIF-1 to -4, -6 to -8, and -10 to -11) or Co(II) (ZIF-9 and -12) with imidazolate-type links. The ZIF crystal structures are based on the nets of seven distinct aluminosilicate zeolites: tetrahedral Si(AI) and the bridging O are replaced with transition metal ion and imidazolate link, respectively. In addition, one example of mixed-coordination imidazolate of Zn(II) and In(III) (ZIF-5) based on the garnet net is reported. Study of the gas adsorption and thermal and chemical stability of two prototypical members, ZIF-8 and -11, demonstrated their permanent porosity (Langmuir surface area = 1,810 m(2)/g), high thermal stability (up to 550 degrees C), and remarkable chemical resistance to boiling alkaline water and organic solvents.