Synthesis and properties of pillared montmorillonite formed by intercalation of transition metal macrocyclic complexes

✍ Scribed by Guo-Hua Liu; An-Nan Ko; Yuan-Chang Chang

• Publisher: Elsevier Science
• Year: 1995
• Tongue: English
• Weight: 485 KB
• Volume: 5
• Category: Article
• ISSN: 0927-6513
• DOI: 10.1016/0927-6513(95)00036-9

✦ Synopsis

The transition metal macrocyclic complex cations M-(trans-14-diene) 2+ (M = Co, Ni, Cu and Zn) were introduced into the interlayers of a sodium montmorillonite clay. The resulting clays were calcined at various temperatures. All samples were thermally stable up to 300°C with interlayer distances of 4.9 ~ 5.1 .~ and specific surface areas of 57~86 m 2 g-1. Both the Lewis and the Br6nsted acid sites were identified by Fourier transform infrared (FTIR) measurements of adsorbed pyridine. The catalyst acidity was obtained from the temperature-programmed desorption (TPD) of ammonia. The catalytic activities in the dehydration of both 2-propanol and 2-butanol were correlated to the surface area and the strong acid amount of these intercalated clays.