scholarly journals Linear/Ladder-Like Polysiloxane Block Copolymers with Methyl-, Trifluoropropyl- and Phenyl- Siloxane Units for Surface Modification

Polymers ◽  
2021 ◽  
Vol 13 (13) ◽  
pp. 2063
Author(s):  
Stepan A. Ostanin ◽  
Alexei V. Kalinin ◽  
Yurij Yu. Bratsyhin ◽  
Natalia N. Saprykina ◽  
Vjacheslav V. Zuev
Keyword(s):  
Mechanical Properties ◽  
Surface Modification ◽  
Solid State ◽  
Nmr Spectroscopy ◽  
29Si Nmr ◽  
Multiblock Copolymers ◽  
Adhesion Properties ◽  
Sem Study ◽  
One Step ◽  
29Si Nmr Spectroscopy

Multiblock copolymers containing linear polydimethylsiloxane or polymethyltrifluoropropylsiloxane and ladder-like polyphenylsiloxane were synthesized in a one-step pathway. The functional homopolymer blocks and final multiblock copolymers were characterized using solution and solid-state multinuclear 1H, 13C, 19F, and 29Si NMR spectroscopy. It was shown that the ladder-like block contains silanol units, which influence the adhesion properties of multiblock copolymers and morphology of their casted films. The adhesion to metals and mechanical properties of multiblock copolymers were tested. The SEM study of casted films of multiblock copolymers shows the variety of formed morphologies, including long-strip-like or globular.

X-ray structure and solid state 29Si NMR spectroscopy of the octahalocyclotetrasilanes, Si4Cl8 and Si4Br8

Polyhedron ◽  
1998 ◽  
Vol 17 (10) ◽  
pp. 1791-1793 ◽  
Author(s):  
Julian R. Koe ◽  
Douglas R. Powell ◽  
Jarrod J. Buffy ◽  
Robert West
Keyword(s):  
Solid State ◽  
Nmr Spectroscopy ◽  
29Si Nmr ◽  
X Ray ◽  
29Si Nmr Spectroscopy

ChemInform Abstract: Perchloropolysilane: X-Ray Structure, Solid-State 29Si NMR Spectroscopy, and Reactions of [SiCl2]n.

ChemInform ◽  
2010 ◽  
Vol 29 (32) ◽  
pp. no-no
Author(s):  
J. R. KOE ◽  
D. R. POWELL ◽  
J. J. BUFFY ◽  
S. HAYASE ◽  
R. WEST
Keyword(s):  
Solid State ◽  
Nmr Spectroscopy ◽  
29Si Nmr ◽  
X Ray ◽  
29Si Nmr Spectroscopy

Solid-state high-resolution 29Si NMR spectroscopy of synthetic 14 Å, 11 Å and 9 Å tobermorites

1982 ◽  
Vol 12 (3) ◽  
pp. 333-339 ◽  
Author(s):  
W. Wieker ◽  
A.-R. Grimmer ◽  
A. Winkler ◽  
M. Mägi ◽  
M. Tarmak ◽  
...  
Keyword(s):  
Solid State ◽  
Nmr Spectroscopy ◽  
High Resolution ◽  
29Si Nmr ◽  
29Si Nmr Spectroscopy

scholarly journals Thermosetting Mechanism Study of Poly[(Phenylvinylsilylene)ethynylene-1,3-phenyleneethynylene] by Solid-State and High-Resolution 1H, 13C, 29Si NMR Spectroscopy.

2000 ◽  
Vol 57 (1) ◽  
pp. 23-29 ◽  
Author(s):  
Hideaki KIMURA ◽  
Kouichi OKITA ◽  
Motokuni ICHITANI ◽  
Kazuhiro OKADA ◽  
Toshiya SUGIMOTO
Keyword(s):  
Solid State ◽  
Nmr Spectroscopy ◽  
High Resolution ◽  
29Si Nmr ◽  
Mechanism Study ◽  
29Si Nmr Spectroscopy

scholarly journals Oligosilanylated Silocanes

Molecules ◽  
2021 ◽  
Vol 26 (1) ◽  
pp. 244
Author(s):  
Mohammad Aghazadeh Meshgi ◽  
Alexander Pöcheim ◽  
Judith Baumgartner ◽  
Viatcheslav V. Jouikov ◽  
Christoph Marschner
Keyword(s):  
Cyclic Voltammetry ◽  
Solid State ◽  
Xrd Analysis ◽  
29Si Nmr ◽  
Single Crystal Xrd ◽  
Substitution Pattern ◽  
Silyl Group ◽  
Steric Factors ◽  
Single Crystal Xrd Analysis ◽  
29Si Nmr Spectroscopy

A number of mono- and dioligosilanylated silocanes were prepared. Compounds included silocanes with 1-methyl-1-tris(trimethylsilyl)silyl, 1,1-bis[tris(trimethylsilyl)silyl], and 1,1-bis[tris(trimethylsilyl)germyl] substitution pattern as well as two examples where the silocane silicon atom is part of a cyclosilane or oxacyclosilane ring. The mono-tris(trimethylsilyl)silylated compound could be converted to the respective silocanylbis(trimethylsilyl)silanides by reaction with KOtBu and in similar reactions the cyclosilanes were transformed to oligosilane-1,3-diides. However, the reaction of the 1,1-bis[tris(trimethylsilyl)silylated] silocane with two equivalents of KOtBu leads to the replacement of one tris(trimethylsilyl)silyl unit with a tert-butoxy substituent followed by silanide formation via KOtBu attack at one of the SiMe3 units of remaining tris(trimethylsilyl)silyl group. For none of the silylated silocanes, signs of hypercoordinative interaction between the nitrogen and silicon silocane atoms were detected either in the solid state. by single crystal XRD analysis, nor in solution by 29Si-NMR spectroscopy. This was further confirmed by cyclic voltammetry and a DFT study, which demonstrated that the N-Si distance in silocanes is not only dependent on the energy of a potential N-Si interaction, but also on steric factors and through-space interactions of the neighboring groups at Si and N, imposing the orientation of the pz(N) orbital relative to the N-Si-X axis.

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