Synthesis and characterization of a novel germanate material containing 16-ring channels and templated by a simple primary amine
Synthesis and characterization of a novel germanate material containing 16-ring channels and templated by a simple primary amine
复制标题
DOI：
10.1021/cm062241x
复制
发表时间：
2007-01-23
影响因子：
8.6
通讯作者：
Royal, Drew S.
中科院分区：
文献类型：
--
作者：
Attfield, Martin P.;Al-Ebini, Yousef;Royal, Drew S.
The new framework germanate (H3NC3H7)(5)(H3O)[Ge18O36(OH)(6)]center dot 3H(2)O (tetragonal, I4cm, a = 24.9728(6) angstrom, c = 9.8957(2) angstrom, Z = 4) has been synthesized by solvothermal methods and the crystal structure determined using single-crystal X-ray diffraction data. The framework of this novel material contains a three-dimensional intersecting channel system, the two largest channels of which are encompassed by large circular 16-rings and elliptical 14-rings, respectively. The material is synthesized in the presence of the relatively small structure-directing agent isopropylamine. (H3NC3H7)(5)(H3O)[Ge18O36(OH)(6)]center dot 3H(2)O is only the second material to be constructed from the secondary building unit [Ge-9(O,OH)(25)] cluster, and the frameworks of these two materials are shown to differ only by the number of chains of [Ge-9(O,OH)(25)] clusters that are used to construct the respective frameworks. Thermal stability studies indicate that the framework of the material is stable with respect to loss of the extraframework water molecules but is unstable with respect to the removal of the extraframework charge-compensating cations.
