Structure-directing agents novel

Both piperidine and pyridine serve as structure-directing agents in the commercial production of Ferrierite zeolite. More recently, use of DMAP has allowed preparation of novel metallo-aluminophosphate molecular sieves with both small- <2006W02006037437> and large-pore architecture <2006USA074267>. 

Novel Blocked Macromolecular Amphiphiles as Structure-Directing Agents for Silica-Type Materials... 

This new family of mesoporous silica and aluminosilicate compounds were obtained by the introduction of supramolecular assemblies. Micellar aggregates, rather than molecular species, were used as structure-directing agents. Then, the growth of inorganic or hybrid networks templated by structured surfactant assemblies permitted the construction of novel types of nanostructured materials in the mesoscopic scale (2-100 nm) [110,113,117],... 

Novel methods of preparation of vanadium phosphate catalysts have been explored by several groups these methods include hydrothermal synthesis, gas-phase s)mthesis, supercritical antisolvent precipitation, and the use of templates and structure-directing agents to modify the bulk... 

Zeolites have micropores with ordered size and solid acidity, and there has been growing interest in the application of zeolites as catalysts as well as molecular sieves. We investigated the synthesis of novel zeolites by using ammonium salts as structure-directing agents (SDAs) [1, 2]. 

Where are the acid sites in zeolites A novel NMR approach to measure B/Al ordering around structure directing agents... 

Where are the acid sites in zeolites A novel NMR approach to measure B/Al ordering around structure directing agents H. Koller, M. Kalwei, C. Fild, R.F. Lobo, M.A. Camblor, LA. Villaescusa and L. van Wiillen... 

Scheme 5.1 Synthetic routes to novel alkylammonium ions as structure directing agents.

The discovery of a novel family of mesoporous molecular sieves (M41-S) has opened the way to new mesostmctured materials [1]. The synthesis involves a templating mechanism in which not single molecules, but supramolecular arrangements such as the liquid crystalline phases of surfactant molecules, serve as structure-directing agents. 

In the present work, iron species were incorporated into a thin film silica matrix by a novel one pot synthesis route recently developed by Hiising et al. [176], in which a non-ionic PEO-based surfactant not only acts as a structure-directing agent, but also can enable to control and slow down the hydrolysis and condensation rate of the metal alkoxide. 

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