Synthetic fluorotetrasilisic mica as a support for stereoselective catalysts

✍ Scribed by T. Nakayama; S. Yoshida; H. Kanai

• Book ID: 104735182
• Publisher: Springer
• Year: 1993
• Tongue: English
• Weight: 444 KB
• Volume: 28
• Category: Article
• ISSN: 0022-2461
• DOI: 10.1007/bf00351248

✦ Synopsis

Synthetic fluorotetrasilisic mica (TSM) is a layered compound which has exchangeable cations between layers. Cupric cations were intercalated into TSM. X-ray diffraction study indicated that layered structures remained after calcination, but the interlayer spacings decreased. The hydrogenation of dienes with copper-exchanged TSM were investigated as heterogeneous catalysts. Ar + ion-beam bombardment on the copper-exchanged TSM proved that copper was intercalated into the interlayer space. The turnover frequency (TOF) of 1,3butadiene hydrogenation over Cu/TSM was 0.57 times lower than that over Cu/AI203 which has no structural obstacles around the active site, while the TOF of 2,3-dimethyl-1,3butadiene hydrogenation as a bulky molecule over Cu/TSM was 0.03 times lower than that over Cu/A[203. TSM possesses an advantage over conventional supports in that bulky substrates have hardly any access to catalytically active sites in the interlayer space.