A5009807200- Silicone and Siloxane Chemistry
- Boron Compounds in Chemistry
- Photopolymerization techniques and applications
- Marine Biology and Environmental Chemistry
- Radiopharmaceutical Chemistry and Applications
- Adsorption, diffusion, and thermodynamic properties of materials
- Material Properties and Applications
- X-ray Diffraction in Crystallography
- Boron and Carbon Nanomaterials Research
- Catalysis and Oxidation Reactions
- Mesoporous Materials and Catalysis
- Chemical Synthesis and Characterization
- biodegradable polymer synthesis and properties
- Crystallization and Solubility Studies
- Organoboron and organosilicon chemistry
- Machine Learning in Materials Science
- Nuclear Materials and Properties
- Catalytic Processes in Materials Science
- Chemical Synthesis and Reactions
- Polyoxometalates: Synthesis and Applications
- Radioactive element chemistry and processing
- Synthesis and characterization of novel inorganic/organometallic compounds
- Carbon dioxide utilization in catalysis
- Organometallic Compounds Synthesis and Characterization
- Synthesis and properties of polymers
A. N. Nesmeyanov Institute of Organoelement Compounds
2020-2024
Tula State Pedagogical University named after L.N. Tolstoy
2023-2024
This work presents a new approach to recycling silicone waste such as depolymerization in ammonia. Optimal conditions (150 °C, 0.25 mL H2O, 24 h) achieve complete polymer conversion...
In this work we propose an approach for obtaining of polydimethylsiloxanes various structures, both linear and branched, by a ring-opening polymerization (ROP) hexamethylcyclotrisiloxane initiated silanols in liquid...
A series of mono- and polyfunctional carborane organosilicon derivatives were prepared with good yields based on the hydrosilylation reactions allylcarboranes hydride-containing compounds such as tetramethyldisiloxane, decamethylpentasiloxane triethoxysilane in presence Karstedt's catalyst.
The synthesis of novel stereoregular carborane-containing phenylcyclosiloxanes (4, 5, 6, 8, and 12 –SiO– units in the ring) has been developed.
This study presents the synthesis of organoboron derivatives stereoregular 4-, 6-, and 12-unit phenylcyclosilsesquioxanes. All compounds obtained were isolated in good yields (70-80 %) fully characterized by 1 H, 13 C, 29 Si, 11 B NMR, IR spectroscopy, HRMS ESI, elemental microanalysis. The structure key modifier, for first time, 4-(tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl) dimethylvinylsilane, was also confirmed single-crystal XRD.
In this work, polycarboranosiloxanes with well-defined structures and a varying content of the carborane moiety (2–15 wt%) were obtained. Data rheological studies indicate that phase separation occurs in such hybrid carboranosiloxane systems.
The experiments on ring-opening polymerization of 1,3,5-trimethyl-1,3,5-triphenylcyclotrisiloxane (D3MePh) in liquid ammonia the presence initiators such as diphenylsilanediol (Ph2Si(OH)2) and triphenylsilanol (Ph3Si(OH)) were carried out. effect reaction time molecular weight characteristics resulting polymers was studied.
Functional polydimethylsiloxanes (PDMSs) containing an alkoxy group at one end of the polymer chain and a hydroxy other were obtained by ring-opening polymerization hexamethylcyclotrisiloxane (D3) in liquid ammonia initiated alcohols different structures. This method implies absence organic solvents, which eliminates stages their purification regeneration, allows for obtaining telechelic PDMSs full agreement with green chemistry principles.
A new efficient approach to the production of high molecular weight polydimethylsiloxanes (PDMSs) is developed based on condensation α,ω-oligodimethylsiloxanols in ammonia. This method provides control over molar mass target PDMSs a wide range (Mw = 11.0–82.0 kg/mol). The use cyclic silazanes as dehydrating agents allows for suppressing side cyclization processes.
The polymerization of hexamethylcyclotrisiloxane (D3Me2) in liquid ammonia using water as an initiator has been studied. These polymers are practical importance for a wide range applications the silicone industry. effect factors such temperature, reaction time, and concentration reactants on process was evaluated. As result, environmentally friendly procedure preparation narrowly dispersed telechelic polydimethylsiloxanes (Mn = 8.0 kDa, PDI 1.11) with monomer conversion up to 98% developed....
The synthesis of new precursors for producing HOFs: systems that are capable reversible structure reorganization reported. A simple and convenient method is described creation a class borosiloxane compounds by combination very flexible siloxane framework with fragments boric acid derivatives. Organoboron derivatives stereoregular phenylcyclosilsesquioxanes were obtained in high yields. Such can be used preparation macro initiators synthesizing macromolecular scaffolds Suzuki cross-coupling...