Kinetics of the reduction of nitroxyl radicals by hydrazo compounds in the meso phase of a liquid crystal. The effect of nematic ordering

Journal Article · Mon Sep 01 04:00:00 EDT 1986 · Kinet. Catal. (Engl. Transl.); (United States)

OSTI ID:6812299

Sergeev, G B; Batyuk, V A; Boronina, T N; Chudinov, G E

A study was carried out on the kinetics of thermal bimolecular reactions leading to the reduction of nitroxyl radicals by hydrazo compounds in a nematic liquid crystal. A positive deviation in the experimental reaction rate constant from the Arrhenius curve obtained in the isotropic phase at higher temperatures is found in the pretransition region of the isotropic phase and in the meso phase. A possible mechanism for the effect of the meso phase on the activation energy of the reactions studied was examined. A method was proposed for describing the temperature dependence of the experimental rate constant in the nematic phase and an equation was obtained relating the rate constant with the order parameter of the liquid crystal and other physical parameters of the solventreagent system.

• Research Organization: Chemistry Faculty, M.V. Lomonosov Moscow State Univ.
• OSTI ID: 6812299
• Journal Information: Kinet. Catal. (Engl. Transl.); (United States), Journal Name: Kinet. Catal. (Engl. Transl.); (United States) Vol. 27:2; ISSN KICAA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ACTIVATION ENERGY
ALKANES
AROMATICS
ARRHENIUS EQUATION
BENZENE
CARBAZONES
CARBONIC ACID DERIVATIVES
CATALYTIC EFFECTS
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
CRYSTALS
DIPHENYLCARBAZONES
ENERGY
EQUATIONS
FLUIDS
HEPTANE
HYDRAZONES
HYDROCARBONS
KINETICS
LIQUID CRYSTALS
LIQUIDS
NITROXYL RADICALS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
PHASE STUDIES
RADICALS
REACTION KINETICS
REDUCTION
SOLVENT PROPERTIES
TEMPERATURE DEPENDENCE