Accession Number : ADA264631


Title :   Ordered Molecular Arrays as Templates: A New Approach to Synthesis of Mesoporous Materials


Descriptive Note : Technical rept. 1 Jun 92-31 May 93,


Corporate Author : CALIFORNIA UNIV SANTA BARBARA DEPT OF CHEMISTRY


Personal Author(s) : Behrens, P ; Stucky, G


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a264631.pdf


Report Date : Jan 1993


Pagination or Media Count : 9


Abstract : There has been a growing interest in the extension of the microporous molecular sieve synthesis and applications to mesoscopic dimensions. Typical areas for the application of mesoscopic zeolite-type structures are in separation (e.g., protein separation and selective adsorption of large organic molecules from waste waters) and catalysis (e.g., processing of tar sand and of the high distillates of crude oils to valuable low-boiling products). Another is in the supramolecular assembly of molecular array and polymers for electronic and optical applications. In a new concept in the synthesis of porous material the templating agent is no longer a single, solvated, organic molecule or metal ion, but rather a self-assembled molecular array. This template leads to mesoporous materials with adjustable pore sizes between 16 and 100 Angstrom, covering well the mesophorous range of greatest interest. The periodic arrangement of pores is very regular, and the pore size distribution measured by absorption is nearly as sharp as that of conventional zeolites.


Descriptors :   *MOLECULAR PROPERTIES , *MOLECULAR SIEVES , ELECTRONICS , IONS , METALS , MOLECULES , ADSORPTION , MATERIALS , POLYMERS , PROTEINS , SYNTHESIS(CHEMISTRY) , ARRAYS , TEMPLATES , QUANTUM EFFICIENCY , SEPARATION , CATALYSIS , COVERINGS , ABSORPTION , ASSEMBLY , CRUDE OIL , TAR , BOILING , POROUS MATERIALS , OILS


Subject Categories : Inorganic Chemistry


Distribution Statement : APPROVED FOR PUBLIC RELEASE