Application of Spectroscopic Methods in the Studies of Polysiloxanes, Cubic  Oligomeric Silsesquioxanes, and Spherosilicates Modified by Organic Functional Groups via Hydrosilylation

Chechelska-Noworyta, Aleksandra; Mrówka, Jan; Owińska, Maria; Hasik, Magdalena

doi:10.1007/978-3-030-01355-4_12

Cited by 5 publications

(5 citation statements)

References 108 publications

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“…Silsesquioxanes can be used as additives in the production of composite materials (significantly improving their thermal and mechanical properties), in optoelectronics, microelectronics, pharmacy (drug carriers), medicine and dentistry. [5][6][7][8][9][10][11] An especially interesting group of silsesquioxanes are octasubstituted cubic cage silsesquioxanes. Their preparation is carried out using a simple hydrolytic condensation reaction of such compounds as trichlorosilanes or trialkoxysilanes.…”

Section: Introductionmentioning

confidence: 99%

Silane‐Bearing Borasilsesquioxanes: Synthetic Protocol and Unsuspected Redistribution Reactions

et al. 2023

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The presented work is a continuation of research on the reactivity of unsaturated borasilsesquioxanes under the conditions of common organometallic transformations. The catalytic hydrosilylation reaction with silanes, siloxanes and silsesquioxanes in presence of platinum catalyst was explored. The majority of the products were obtained in high yields (> 90 %) and their structures were confirmed and characterized by spectroscopy and spectrometry, i. e. NMR and MALDI-TOF-MS.The most significant segment of the work is research on the spontaneous redistribution reaction of the alkoxy group from silane to borane moiety occurring in the obtained products, not being limited to the heterosilsesquioxane chemistry, however. The products were confirmed using GC-MS, ESI-MS methods and B3LYP exchange-correlation, in order to ascertain formation of the silicon-boron hybrid molecule.

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Section: Introductionmentioning

confidence: 99%

Silane‐Bearing Borasilsesquioxanes: Synthetic Protocol and Unsuspected Redistribution Reactions

et al. 2023

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“…There is a growing demand for hybrid materials with specific and designed properties that are deposited as a coating or a thin film to modify the tactile, optical, electrical, or wetting properties of surfaces. − The development of thin films that are both hydrophobic and porous is particularly valuable to be used in a.o. gas sensing applications where high humidity levels decrease the sensing sensitivity (e.g., the detection of volatile organic compounds). − Within the silica world, polyhderal oligomeric silsesquioxanes (POSS) and the related spherosilicates are considered the ideal nanoprecursors for such materials. ,,,− Both compounds are built up from a symmetrical core with different chemical groups attached to its corners. Most often the core is an octameric cyclosilicate cage, also known as the double four ring or D4R with chemical formula [Si 8 O 12 ].…”

Section: Introductionmentioning

confidence: 99%

“…Additionally, the process of making such films can be quite complex. On the one hand, complexity arises from the synthesis of the POSS or spherosilicate precursor used for the deposition of the thin film, which often consists of multiple steps including purification/separation. ,− ,,,,,− On the other hand, the development of POSS or spherosilicate containing thin films often uses complex deposition procedures or uses more expensive methods such as physical vapor deposition. − ,,,,,,,,, In the previous work, we have presented the straightforward synthesis of the reactive spherosilicate that could provide a more direct approach to the development of functionalized hybrid thin films. By reacting dichlorodimethylsilane with the D4R oligomers of cyclosilicate hydrate crystals, [Si 8 O 12 ][OSi(CH 3 ) 2 Cl] 8 spherosilicate is obtained with high yield and high purity …”

Section: Introductionmentioning

confidence: 99%

Cross-Linking Nanometer-Sized Reactive Spherosilicates to Synthesize Tuneable Hydrophobic POSiSil Foams Suitable for Applications as Sensors

Smet,

Vallaey,

Sree

et al. 2023

ACS Appl. Nano Mater.

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Thin hydrophobic polyoligosiloxysilicone (POSiSil) films were synthesized on silicon wafer substrates by spin coating reactive nanometer-sized spherosilicate solutions. Surface roughness was spontaneously induced due to the generation of HCl gas bubbles during the coating procedure, involving the cross-linking and solidification of spherosilicates. Variations in the coating solution and/or relative humidity during the curing phase allowed for a degree of precision in controlling this roughness, thereby impacting parameters such as the porosity and the static contact angle of water on the surface. The introduction of Pluronic 123 into the coating solution, followed by a calcination step after curing, was employed to further augment the surface roughness and porosity. Coatings characterized by uniform foam-like morphologies were synthesized, exhibiting static water contact angles as elevated as 135°. These hydrophobic POSiSil thin films with thicknesses in the nanometer scale have minimal interaction with water, as evidenced by wetting experiments conducted during the ellipsometry. The films also demonstrate the high chemical and thermal stability with no change in the morphology or static contact angle with water. The presence of significant surface area, resulting from the foam-like matrix, coupled with its innate hydrophobic properties and a relatively simple and easily attainable synthesis process, bestows upon the POSiSil coatings considerable potential across a broad spectrum of applications. One noteworthy application includes their use in the detection of volatile organic compounds.

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“…They found many applications, including composite materials (as an additive that considerably improves thermal and mechanical properties), catalysis, biomedical applications (drug carriers, dentistry), surface coatings, optoelectronics, microelectronics, etc. [ 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 ].…”

Section: Introductionmentioning

confidence: 99%

New Ethynylphenylborasilsesquioxanes—Their Reactivity and Behavior during Thermal Decomposition

Frydrych,

Sztorch,

Przekop

et al. 2023

IJMS

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In this paper, a new type of borasilsesquioxanes was synthesized through a condensation process, and its reactivity in catalytic hydrosilylation reactions with silanes, siloxanes, and silsesquioxanes was investigated. The obtained compounds were mostly obtained in >90% yield. They were fully characterized using spectroscopic (1H, 13C, 29Si NMR) and spectrometric (MALDI-TOF-MS) methods. The next stage of the research involved studying the thermogravimetric properties of the borasilsesquioxanes. By analyzing the different stages of decomposition using spectroscopic techniques (NMR, ATR-FTIR, Raman) and microscopic imaging, it was found that the structure of the borasilsesquioxanes changed during the pyrolysis process and polymer compounds were formed.

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Application of Spectroscopic Methods in the Studies of Polysiloxanes, Cubic Oligomeric Silsesquioxanes, and Spherosilicates Modified by Organic Functional Groups via Hydrosilylation

Cited by 5 publications

References 108 publications

Silane‐Bearing Borasilsesquioxanes: Synthetic Protocol and Unsuspected Redistribution Reactions

Silane‐Bearing Borasilsesquioxanes: Synthetic Protocol and Unsuspected Redistribution Reactions

Cross-Linking Nanometer-Sized Reactive Spherosilicates to Synthesize Tuneable Hydrophobic POSiSil Foams Suitable for Applications as Sensors

New Ethynylphenylborasilsesquioxanes—Their Reactivity and Behavior during Thermal Decomposition

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