Activation of phase boundary and current-generating processes in plasma-electrochemical systems

This paper reviews and presents the principles for implementing

Phase boundary texturing influence on laminated compound durability under local thermal effect

Destruction process modeling has been conducted for a laminated material under a local pointed thermal effect. Temperature field dependence on the coating surface texturing parameters has been studied. A mathematical model of the load distribution in the laminated material with wavy coating surface texturing under thermal effect is presented

Functionalized Poly(3-hexylthiophene)s via Lithium–Bromine Exchange

Poly(3-hexylthiophene) (P3HT) is one of the most extensively investigated conjugated polymers and has been employed as the active material in many devices including field-effect transistors, organic photovoltaics and sensors. As a result, methods to further tune the properties of P3HT are desirable for specific applications. Herein, we report a facile postpolymerization modification strategy to functionalize the 4-position of commercially available P3HT in two simple steps–bromination of the 4-position of P3HT (Br–P3HT) followed by lithium−bromine exchange and quenching with an electrophile. We achieved near quantitative lithium–bromine exchange with Br–P3HT, which requires over 100 thienyl lithiates to be present on a single polymer chain. The lithiated-P3HT is readily combined with functional electrophiles, resulting in P3HT derivatives with ketones, secondary alcohols, trimethylsilyl (TMS) group, fluorine, or an azide at the 4-position. We demonstrated that the azide-modified P3HT could undergo Cu-catalyzed or Cu-free click chemistry, significantly expanding the complexity of the structures that can be appended to P3HT using this method.National Science Foundation (U.S.) (ECCS-0939514

Studying the regularities of high-energy flow localization in micro- and nano-layers at the interface of solid and liquid media

The paper presents the results of research performed by the modeling method and focusing on the distribution of material and energy flows at the interface of solid and liquid media under non-steady-state conditions. Modeling was performed using the case of two parallel oxidation-reduction reactions that occur under the impact of an external current supply of unlimited power. The identified regularities can be used when designing and arranging specific heterogeneous oxidation-reduction processes, in order to arrange local energy impact, including when one needs to form the nano-structured non-metallic inorganic coatings by microplasma method. Modeling demonstrates that nanosized localization of high-energy flows is possible at the media interface. Depending on pulse duration, the instantaneous energy can exceed the bond energy of chemical compounds. The identified regularities are true for description of non-steady-state heterogeneous oxidation-reduction reactions in chemistry, electrochemistry, catalysis and other areas of science and technology

Studying the regularities of high-energy flow localization in micro- and nano-layers at the interface of solid and liquid media

The paper presents the results of research performed by the modeling method and focusing on the distribution of material and energy flows at the interface of solid and liquid media under non-steady-state conditions. Modeling was performed using the case of two parallel oxidation-reduction reactions that occur under the impact of an external current supply of unlimited power. The identified regularities can be used when designing and arranging specific heterogeneous oxidation-reduction processes, in order to arrange local energy impact, including when one needs to form the nano-structured non-metallic inorganic coatings by microplasma method. Modeling demonstrates that nanosized localization of high-energy flows is possible at the media interface. Depending on pulse duration, the instantaneous energy can exceed the bond energy of chemical compounds. The identified regularities are true for description of non-steady-state heterogeneous oxidation-reduction reactions in chemistry, electrochemistry, catalysis and other areas of science and technology

Synthesis of nanostructured nonmetallic inorganic coatings at high energy localization in interfacial nanolayers

The paper presents the mathematical model of the microplasma process in an electrolyte solution and the main equation of the nanostructured nonmetallic inorganic coating growth during the coating formation on the material surface under conditions of the high energy localization in interfacial nanolayers. The microplasma process is considered as a microplasma collective discharge. The proposed physicochemical model links the main parameters of electrochemical and microplasma processes (concentration, temperature, polarization voltage, pulse duration, time of microplasma treatment) in electrolyte solutions with the parameters of the coating synthesis (growth rate, thickness, grain size). The total microplasma discharge current is limited by the current passing through the nonmixed interlayer

Synthesis of Mono-, Di-, and Trisilyl-Substituted Alkenes via the Hydrosilylation of Methylenecyclopropanes Catalyzed by Rh(I) Complexes

International audienc

Activation of phase boundary and current-generating processes in plasma-electrochemical systems

This paper reviews and presents the principles for implementing

Phase boundary texturing influence on laminated compound durability under local thermal effect

Destruction process modeling has been conducted for a laminated material under a local pointed thermal effect. Temperature field dependence on the coating surface texturing parameters has been studied. A mathematical model of the load distribution in the laminated material with wavy coating surface texturing under thermal effect is presented