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Novel Synthetic Methodologies for Organosilicon Materials

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A special issue of Polymers (ISSN 2073-4360). This special issue belongs to the section "Polymer Chemistry".

Deadline for manuscript submissions: 31 May 2024 | Viewed by 4456

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Special Issue Editors

Dr. Dengxu Wang

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Guest Editor

National Engineering Technology Research Center for Colloidal Materials & Key Laboratory of Special Functional Aggregated Materials, Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China
Interests: new method of organic silicon synthesis; organic silicon porous material; organic silicon light-emitting materials; special organic silicon materials; polymer synthesis; organosilicon
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Dr. Yuetao Liu

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Guest Editor

College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
Interests: organosilicon compounds and polymers; functional organosilicon polymers; organosilicon/inorganic hybrid materials

Special Issue Information

Dear Colleagues,

Organosilicon materials have found wide applications in many areas, such as aerospace, construction, electronics, and bio-medicine, and their unique and valuable properties have rendered them virtually irreplaceable. However, unlike numerous organic synthetic methods, the methodologies to generate organosilicon materials remain limited, and their species and applications are not comparable to conventional carbon-based materials. In the past several decades, researchers have devoted massive efforts to introduce a variety of organic or polymer synthetic methodologies in the area of silicon chemistry, and have developed diversified organosilicon materials with novel structures and specific functionalities which have expanded their applications in new areas, such as sensors, catalysis, organic light-emitting diodes, organic semiconductors, and wearable and flexible electronic devices, among others.

This Special Issue aims to assemble results about novel methodologies for the design, synthesis, and application of organosilicon materials.

Dr. Dengxu Wang
Dr. Yuetao Liu
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Polymers is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2700 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

organosilicon materials
synthetic methodology
silicone
silicone elastomers
silicone resin
siloxane
polysiloxane
silsesquioxane
silane

Published Papers (3 papers)

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Research

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13 pages, 4094 KiB

Open AccessArticle

The Impact of the Molecular Weight of Degradation Products with Silicon from Porous Chitosan–Siloxane Hybrids on Neuronal Cell Behavior

by Yuki Shirosaki, Federica Fregnan, Luisa Muratori, Saki Yasutomi, Stefano Geuna and Stefania Raimondo

Polymers 2023, 15(15), 3272; https://doi.org/10.3390/polym15153272 - 1 Aug 2023

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Abstract

Silicon (Si) is an essential trace element in the human body and it exists in connective tissue as aqueous orthosilicic acid. Porous chitosan–3-glycidoxypropyltrimethoxysilane (GPTMS) hybrids can regenerate nerve tissue and recover sensor and motor functions. However, the structures and roles of the degradation products with Si extracted from the hybrids in nerve regeneration are not clear. In this study, we prepared porous chitosan–GPTMS hybrids with different amounts of GPTMS to amino groups of chitosan (chitosan:GPTMS = 1:0.5 and 1:1 molar ratios). The structures of the degradation products with Si from the hybrids were examined using time-of-flight mass spectrometry, and biological assessments were conducted in order to evaluate their potential use in the preparation of devices for nerve repair. Glial and motor cell lines and ex vivo explants of dorsal root ganglia were used in this study for evaluating their behavior in the presence of the different degradation products with Si. The structure of the degradation products with Si depended on the starting composition. The results showed that glial cell proliferation was lower in the medium with the higher-molecular-weight degradation products with Si. Moreover, motor cell line differentiation and the neurite outgrowth of dorsal root ganglion explants were improved with the lower-molecular-weight degradation products with Si. The results obtained could be useful for designing a new nerve regeneration scaffold including silicon components. Full article

(This article belongs to the Special Issue Novel Synthetic Methodologies for Organosilicon Materials)

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13 pages, 9667 KiB

Open AccessArticle

Molecular Aggregation Strategy for Pore Generation in SiOC Ceramics Induced by the Conjugation Force of Phenyl

by Gang Yi and Yuxi Yu

Polymers 2023, 15(12), 2676; https://doi.org/10.3390/polym15122676 - 14 Jun 2023

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Abstract

Porous silicon oxycarbide (SiOC) ceramics with tailorable microstructure and porosity were fabricated using phenyl-substituted cyclosiloxane (C-Ph) as a molecular-scale porogen are analyzed in this study. A gelated precursor was synthesized via the hydrosilylation of hydrogenated and vinyl-functionalized cyclosiloxanes (CSOs), followed by pyrolysis at 800–1400 °C in flowing N₂ gas. Tailored morphologies, such as closed-pore and particle-packing structures, with porosities in the range 20.2–68.2% were achieved by utilizing the high boiling point of C-Ph and the molecular aggregation in the precursor gel induced by the conjugation force of phenyl. Moreover, some of the C-Ph participated in pyrolysis as a carbon source, which was confirmed by the carbon content and thermogravimetric analysis (TGA) data. This was further confirmed by the presence of graphite crystals derived from C-Ph, as determined by high-resolution transmission electron microscopy (HRTEM). In addition, the proportion of C-Ph involved in the ceramic process and its mechanism were investigated. The molecular aggregation strategy for phase separation was demonstrated to be facile and efficient, which may promote further research on porous materials. Moreover, the obtained low thermal conductivity of 27.4 mW m⁻¹ K⁻¹ may contribute to the development of thermal insulation materials. Full article

(This article belongs to the Special Issue Novel Synthetic Methodologies for Organosilicon Materials)

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Review

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21 pages, 5680 KiB

Open AccessReview

Organosilicon Fluorescent Materials

by Zixu Chen, Shengyu Feng and Dengxu Wang

Polymers 2023, 15(2), 332; https://doi.org/10.3390/polym15020332 - 9 Jan 2023

Cited by 8 | Viewed by 2350

Abstract

In the past few decades, organosilicon fluorescent materials have attracted great attention in the field of fluorescent materials not only due to their abundant and flexible structures, but also because of their intriguing fluorescence properties, distinct from silicon-free fluorescent materials. Considering their unique properties, they have found broad application prospects in the fields of chemosensor, bioimaging, light-emitting diodes, etc. However, a comprehensive review focusing on this field, from the perspective of their catalogs and applications, is still absent. In this review, organosilicon fluorescent materials are classified into two main types, organosilicon small molecules and polymers. The former includes fluorescent aryl silanes and siloxanes, and the latter are mainly fluorescent polysiloxanes. Their synthesis and applications are summarized. In particular, the function of silicon atoms in fluorescent materials is introduced. Finally, the development trend of organosilicon fluorescent materials is prospected. Full article

(This article belongs to the Special Issue Novel Synthetic Methodologies for Organosilicon Materials)

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