Ligand Exchange Reaction between Ferrocene and Multiwalled Carbon Nanotubes: A Contemporary Approach.

Ligand exchange reaction (LER) between carbon nanoparticles and ferrocene (CpFe) was conducted several times, but there was no convincing evidence of half-sandwich CpFe coordination to multiwalled carbon nanotubes (MWCNT). In this study, MWCNT is modified by LER with ferrocene using AlCl/Al as a catalytic system. The modified MWCNT (Fc-MWCNT) are investigated for better understanding of the processes taking place on the surface of MWCNT using different spectroscopic and electrochemical methods.

Holmium-Containing Metal-Organic Frameworks as Modifiers for PEBA-Based Membranes.

Recently, there has been an active search for new modifiers to create hybrid polymeric materials for various applications, in particular, membrane technology. One of the topical modifiers is metal-organic frameworks (MOFs), which can significantly alter the characteristics of obtained mixed matrix membranes (MMMs). In this work, new holmium-based MOFs (Ho-MOFs) were synthesized for polyether block amide (PEBA) modification to develop novel MMMs with improved properties.

-Interactions in 1,8-bis(dimethylamino)naphthalene -ketimine cations facilitate [1,5]-hydride shift: selective synthesis of 1,2,3,4-tetrahydrobenzo[]quinazolines.

Selective heterocyclization leading to 1,2,3,4-tetrahydrobenzo[]quinazolines from -ketimines of 1,8-bis(dimethylamino)naphthalene () under acid catalysis has been revealed. In contrast to the rather unreactive ,-dimethylaniline -ketimine, readily undergo this transformation without an additional catalyst. This distinction in the reactivity underscores the importance of the second -NMe group in , which facilitates a [1,5]-hydride shift and the subsequent cyclization.

Conditions for Production of Composite Material Based on Aluminum and Carbon Nanofibers and Its Physic-Mechanical Properties.

Aluminum-based metallic matrix composites reinforced by carbon nanofibers (CNFs) are important precursors for development of new light and ultralight materials with enhanced properties and high specific characteristics. In the present work, powder metallurgy technique was applied for production of composites based on reinforcement of aluminum matrices by CNFs of different concentrations (0~2.5 wt%).