Vertical Aluminophosphate Molecular Sieve Crystals Grown at Inorganic-Organic Interfaces

Tubular aluminophosphate molecular sieve crystals were grown at an organic interface with their channels (7 angstroms in cross section) vertical to the substrate. To induce surface nucleation and oriented growth of AIPO4-5 crystals, organophosphonate layers cross-linked with Zr(IV) were assembled on a gold substrate and the modified substrate was immersed in a hydrothermal bath containing reagents for the synthesis of the molecular sieve. Reflection-absorption infrared studies demonstrated the stability of the phosphonate layers under these conditions. Drastic changes in the morphology of the surface-grown crystals from spherical agglomerates to vertical needles to thin tilted needles could be achieved by adjusting the water content of the synthesis bath. Nitrogen sorption in these structures on a piezoelectric device confirmed the presence of zeolitic microporosity.

[1]  Sungmin Hong,et al.  Greenland Ice Evidence of Hemispheric Lead Pollution Two Millennia Ago by Greek and Roman Civilizations , 1994, Science.

[2]  S. Bent,et al.  Structural Characterization of Self-Assembled Multilayers by FTIR , 1994 .

[3]  Stephen Mann,et al.  Molecular tectonics in biomineralization and biomimetic materials chemistry , 1993, Nature.

[4]  S. Mann,et al.  Crystallization at Inorganic-organic Interfaces: Biominerals and Biomimetic Synthesis , 1993, Science.

[5]  Brian L. Frey,et al.  Vibrational spectroscopic studies of the attachment chemistry for zirconium phosphonate multilayers at gold and germanium surfaces , 1993 .

[6]  Mark E. Davis.  NEW VISTAS IN ZEOLITE AND MOLECULAR SIEVE CATALYSIS , 1993 .

[7]  J. C. Jansen,et al.  Oriented growth of silica molecular sieve crystals as supported films , 1993 .

[8]  Thomas E. Mallouk,et al.  LAYERED METAL PHOSPHATES AND PHOSPHONATES : FROM CRYSTALS TO MONOLAYERS , 1992 .

[9]  Raul F. Lobo,et al.  Zeolite and molecular sieve synthesis , 1992 .

[10]  J. Tsikoyiannis,et al.  Synthesis and characterization of a pure zeolitic membrane , 1992 .

[11]  S. Suib,et al.  Growth of zeolite crystallites and coatings on metal surfaces , 1990 .

[12]  T. M. Putvinski,et al.  Self-assembly of organic multilayers with polar order using zirconium phosphate bonding between layers , 1990 .

[13]  S. Qiu,et al.  Synthesis and structure of the [AlPO4]12 Pr4NF molecular sieve with AFI structure , 1989 .

[14]  T. Mallouk,et al.  Adsorption of ordered zirconium phosphonate multilayer films on silicon and gold surfaces , 1988 .

[15]  J. Weitkamp.  Zeolites and related microporous materials : state of the art 1994 : proceedings of the 10th International Zeolite Conference, Garmisch-Partenkirchen, Germany, July 17-22, 1994 , 1994 .

[16]  T. Bein,et al.  Growth of oriented molecular sieve crystals on organophosphonate films , 1994, Nature.

[17]  T. Bein,et al.  Molecular recognition on acoustic wave devices: sorption in chemically anchored zeolite monolayers , 1992 .

[18]  P. Budd,et al.  Materials chemistry communications. Synthesis of a zeolite NaA membrane , 1992 .

[19]  M. D. Exter,et al.  Synthesis and characterization of zeolite (MFI) membranes on porous ceramic supports , 1992 .