Layered and molecular-structural control in polyoxomolybdate hybrid crystals by surfactant chain length

作者：Ito Takeru^*; Nakagawa Masashi; Kobayashi Jun; Matsumoto Takashi; Otobe Said; Naruke Haruo

来源：Journal of Molecular Structure, 2016, 1106: 220-226.

DOI：10.1016/j.molstruc.2015.10.093

• Inorganic-organic hybrid
• Layered crystal
• Surfactant
• Polyoxometalate
• Isomer

Polyoxomolybdate-surfactant hybrid layered crystals were synthesized by using single-tailed alkyl-trimethylammonium ([CnH2n+1N(CH3)(3)](+) (C-n), n = 8, 10, 12, 14, 16, and 18) cations. The crystal structures consisted of alternate stacking of octamolybdate ([Mo8O26](4-), Mos) anionic layers and surfactant cationic layers. The layered distance of the hybrid crystals became longer from 18.5 A to 26.5 A with an increase in alkyl chain length. Interestingly, the molecular structures of Mos, which has several isomers, depended on the alkyl chain length of the employed surfactants. Shorter surfactant (C-8 and C-10) formed hybrid crystals containing beta-type Mos isomer, while surfactant with longer alkyl chain (C-12, C-14, C-16, and C-18) gave crystals containing 8-type Mos isomer. This structural controllability will lead to the precise functional control in the polyoxomolybdate-surfactant hybrid layered crystals.

• 出版日期2016-2-15