Abstracts

Chemicals, plastics and rubber industries

Search abstracts:

(super 29)Si NMR studies of zeolite precursor solutions

Article Abstract:

Solution (super 29)Si NMR spectroscopy results of zeolite precursor solutions of composition 1 SiO2:4 C2H5Oh: 0.36/n R(super +n)[OH(super -)](sub n):20 H2O is reported. The spectra of solutions containing tetrapropyammonium hydroxide using both one-dimensional and two-dimensional methods are wholly consistent with the existing silicate chemistry literature and indicate that the majority of the species are high-symmetry silicate clusters.

Silicon & Inorganic Compounds, Nuclear magnetic resonance spectroscopy, Silicon compounds

---

Incorporation of 2-arylhexa-1,5-diene into pentasil zeolite: A distorted 1-arylcyclohexane-1,4-diyl radical cation at room temperature

Article Abstract:

The incorporation of redox-active pentasil zeolite [(Na,H)-ZSM-5] converts 2-arylhexa-1,5-dienes into 1-arylcyclohexane-1,4-diyl radical cations. The ESR spectra of 1-arylcyclohexane-1,4-diyl radical cations indicated the presence of five essentially equivalent nuclei, indicating limited delocalization of spin and charge into the phenyl group.

New Jersey, Observations, Chemical bonds, Chemical properties, Phenyl compounds

---

Step-scan FT-IR monitoring of transient HCO radicals in a room temperature zeolite

Article Abstract:

The detection of HCO radicals in zeolite NaY by step-scan FT-IR spectroscopy has revealed an unexpectedly long lifetime at room temperature. For the glycoaldehyde precursor, the final products recorded by static FT- IR spectroscopy indicate that they exclusively involve reactions of HCO and CH2OH radicals.

Radicals (Chemistry)

Similar abstracts:

• Abstracts: Acetone chemistry on oxidized ad reduced TiO2(110). Photooxidation of acetone on TiO2(110): Conversion to acetate via methyl radical ejection
• Abstracts: (super 27)Al and (super 19)F solid-state NMR studies of zeolite H-beta dealuminated with ammonium hexafluorosilicate
• Abstracts: Molecular orbital calculations on the protonation of hydrogen-bonded formamide chains. Implications for peptides
• Abstracts: Optimized biorecognition of cytochrome c 551 and azurin immobilized on thiol-terminated monolayers assembled on Au(111) substrates
• Abstracts: Structural characteristics of a 0.23 mole fraction aqueous solution of tetrahydrofuran at 20 degree Celsius. Structure and thermal expansivity of tetrahydrofuran deuterate determined by neutron powder diffraction

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