Accession Number : ADA251985


Title :   3-D Periodic Packaging: Sodalite, a Model System


Descriptive Note : Technical rept.,


Corporate Author : CALIFORNIA UNIV SANTA BARBARA DEPT OF CHEMISTRY


Personal Author(s) : Stucky, G. D. ; Srdanov, V. I. ; Harrison, W. T. ; Gier, T. E. ; Keder, N. L.


Full Text : http://www.dtic.mil/get-tr-doc/pdf?AD=ADA251985


Report Date : 15 MAY 1992


Pagination or Media Count : 16


Abstract : The 3-d periodicity of molecular sieve surfaces coupled with the ability to vary pore size, topology and chemical potential of the framework permits considerable latitude in the assembly of confined atomic and molecular arrays. Sodalite, one of the simplest zeolite analogue structures with a 60 atom cage can be synthesized with a broad range of different atoms to give effective cage charges varying from 0 to -6. Non-hydrogen atom clusters of up to 9 atoms and hydrogen atom containing clusters with as many as 17 atoms can be assembled within the cage during synthesis or by gas phase or ion exchange inclusion. The optical and structural properties of the included clusters can be systematically modified by changes in the cage dimensions and framework electric field. The structure of both the frameworks and the clusters within the cages of sodalite structural analogues can be precisely determined. In addition to new framework compositions with the sodalite structure, approaches to synthesize new classes of materials consisting of semiconductor, metal or molecular clusters confined within open framework structures are discussed.


Descriptors :   *ARRAYS , *OPTICAL PROPERTIES , *MOLECULAR SIEVES , PHASE , INCLUSIONS , SURFACES , TOPOLOGY , ION EXCHANGE , PERIODIC VARIATIONS , ELECTRIC FIELDS , STRUCTURAL PROPERTIES , SYNTHESIS , HYDROGEN


Subject Categories : INDUSTRIAL CHEMISTRY AND CHEMICAL PROCESSING
      OPTICS


Distribution Statement : APPROVED FOR PUBLIC RELEASE