Active site nature of pyrogenic alumina/silica and water bound to surfaces

VM Gun'Ko, VV Turov, VI Zarko, EF Voronin… - Langmuir, 1997 - ACS Publications
The natures of the pyrogenic alumina/silica (AS) surface and water adsorbed on AS were
studied by 1H NMR, infrared (IR), dielectric relaxation (DRS), and optical spectroscopies …

Connection between chemisorption kinetics and adsorption equilibria of organic compounds on oxide surfaces

VI Bogillo, VM Gun'ko - Langmuir, 1996 - ACS Publications
Quantum chemical computations of potential energy surface sections along the reaction
pathway for interaction of some molecules with silica surface OH groups in a cluster …

Application of the MNDO method to investigation of properties and reactivity of molecules

AA Voityuk - Journal of Structural Chemistry, 1988 - Springer
The calculation scheme and parametrization of the MNDO method have been briefly
considered. Values of the semiempirical parameters have been presented. A modification of …

Investigation of the electronic structure and properties of cluster models of silica by the MNDQ method

YI Gorlov, VA Zaets, AA Chuiko - Theoretical and experimental chemistry, 1987 - Springer
Abstract Using the LCAO MO SCF method in the MNDO valence approximation, we have
carried out a systematic study of the electronic and spatial structure of cluster models of the …

Water adsorption at pyrogenic silica surfaces modified by phosphorus compounds

VV Turov, VM Gun'ko, VI Zarko, VM Bogatyr'ov… - Langmuir, 1996 - ACS Publications
Water adsorbed on pyrogenic silica modified by phosphorus chlorides, which were then
hydrolyzed, was studied by 1H NMR, dielectric, and IR spectroscopies and quantum …

A form of the MINDO/3 method for hydrogen-bonded complexes

NU Zhanpeisov, AG Pel'menshchikov… - Journal of Structural …, 1987 - elibrary.ru
A modified form of the MINDO/3 method has been devised for calculating energies of
formation and geometries for hydrogen-bonded complexes (the MINDO/3-HB method). The …

New ideas on phase transfer catalysts: SN2 reaction with a solid ionophoric salt

SS Yufit, IA Esikova - Journal of physical organic chemistry, 1991 - Wiley Online Library
A new mechanism of substitution between n‐hexyl bromide (RBr) and solid potassium
chloride in toluene under phasetransfer catalysis conditions is suggested, involving the …

Cluster structures for water adsorbed on SiO2

YI Gorlov, VA Zaets, AA Chuiko - Theoretical and Experimental Chemistry, 1989 - Springer
Abstract The MO LCAO SCF method has been used in the MNDO approximation to examine
the electronic structures and formation energies for adsorption complexes for water on SiO 2 …

The role of molecular complexes in the preparation of highly pure materials

GG Devyatykh, PG Sennikov… - Russian Chemical …, 1986 - iopscience.iop.org
Various aspects of the influence of molecular complexes on the efficiency of two-phase
methods for purifying substances have been examined (for the case of the volatile inorganic …

Parametrization in the AM 1 method

AT Pilipenko, VA Zaets, ER Falendysh… - Theoretical and …, 1988 - Springer
Parameter definition is considered for the AM 1 method, which is a new modification of
MNDO incorporating better correction for atomic-core repulsion, so the promising approach …