New organically templated gallium oxalate-phosphate structures based on Ga4(PO4)4(C2O4) building unit

✍ Scribed by Zhenxia Chen; Songliang Tan; Linhong Weng; Yaming Zhou; Xiang Gao; Dongyuan Zhao

• Publisher: Elsevier Science
• Year: 2006
• Tongue: English
• Weight: 629 KB
• Volume: 179
• Category: Article
• ISSN: 0022-4596
• DOI: 10.1016/j.jssc.2006.03.031

✦ Synopsis

Five organic-inorganic hybrid gallium oxalate-phosphates, [Ga 2 (PO 4 ) 5), have been synthesized by using 1,3-diaminopropane, ethylenediamine and diethylene triamine as structuredirecting agents under hydrothermal condition. The structures of 1-5 are based on Ga 4 (PO 4 ) 4 (C 2 O 4 ) building unit made up from Ga 2 O 8 (C 2 O 4 ) oxalate-bridging dimer and alternating PO 4 and GaO 4 tetrahedral units. Compound 1 is layered structure where the building units link together in the same orientation. Corner sharing of these similar layers result in three-dimensional (3-D) structure 2. However, in compound 3, the building units arrange in a wave-like way to generate two types of eight member ring (8MR) channels. Both 4 and 5 contain the layers where the building units have an opposite orientation. Those layers are linked by H 2 PO 4 group and Ga(PO 4 )(H 2 O) 3 cluster, respectively, to form 3-D frameworks with 12MR large pore channels. Compounds 2-5 exhibit intersecting 3-D channels where the protoned amines are located.