Synthesis and structure of as-prepared ITQ-4, a large pore pure silica zeolite: the role and location of fluoride anions and organic cations

Article Abstract:

Pure silica ITQ-4 was synthesized in the presence of fluoride ions and N-benzylquinuclidinium cations within a wide range of synthesis hydrogen-ion concentration to study the location and role of fluoride anions during crystallizations and the structure of the pure silica zeolite. Results showed that the sinuosity of the channel ITQ-4 coincides with the bent structure for the N-benzylquinuclidinium cation. The fluoride anions were found to be located with a small cage near the periphery of the central pore space.

Silica, Molecular structure, Cations, Fluorides, Hydrogen-ion concentration, Anions, Silicon dioxide

---

Mobility and clustering of Rh and Ru in zeolite. Experiment and theory

Article Abstract:

A study was conducted to analyze the mobility and clustering of rhodium and ruthenium in zeolites. Transition metal clusters were utilized to examine surface phenomena. The dangling bonds of oxygen and silicon at the surface were saturated with hydrogen atoms. Results indicated that some Rh(I) species can occupy adjacent surface sites and are mobile to some extent. Findings also showed that Rh(super 0) surface species are more mobile than Rh(I) surface species.

Rhodium, Ruthenium

---

effects of coadsorbed water on the mobility of polyaromatic hydrocarbons in zeolite Y

Article Abstract:

A new study investigates the effects of coadsorbed H2O on the diffusion of polyaromatic hydrocarbons in zeolite Y.

Chemistry, Physical and theoretical, Physical chemistry, Diffusion, Diffusion (Physics), Aromatic compounds

Similar abstracts:

• Abstracts: Synthesis and structural studies of polyphilic mesogens with central or terminal perfluoroalkyl chains. The electronic structures and formation mechanisms of the single-walled BN nanotube with small diameter
• Abstracts: Picosecond dynamics of silver nanoclusters. Photoejection of electrons and fragmentation. Peroxyester decarboxylation studied by picosecond transient IR spectroscopy
• Abstracts: A density functional theory study of the hydrates of NH3.H2SO4 and its implications for the formation of new atmospheric particles
• Abstracts: Chemical and electrostatic association of various metal ions by poly(acrylic acid) and poly(methacrylic acid) as studied by potentiometry
• Abstracts: Fractional Stokes-Einstein relationship in biological colloids: role of mixed stick-slip boundary conditions. Film tension and film rupture of alkanes at the air-water interface using axisymmetric drop shape analysis

This website is not affiliated with document authors or copyright owners. This page is provided for informational purposes only. Unintentional errors are possible.