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Progress in Silicon and Organosilicon Chemistry
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Progress in Silicon and Organosilicon Chemistry

A special issue of Molecules (ISSN 1420-3049). This special issue belongs to the section "Organic Chemistry".

Deadline for manuscript submissions: closed (30 September 2017) | Viewed by 23482

Special Issue Editors

Prof. Dr. Shengyu Feng

E-Mail Website
Guest Editor
Key Laboratory of Special Functional Aggregated Materials, Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, Jinan 250199, China
Interests: organosilicon chemistry; organosilicon polymer; polymer chemistry; polymer materials
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Qingzeng Zhu

E-Mail Website
Guest Editor
Key Laboratory of Special Functional Aggregated Materials, Ministry of Education; School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China
Interests: functional silanes; silicone polymers; organosilicon-based polymer materials; processing, manufacturing; polymer biomaterials; high-perfomance polymers and applications of silicone polymers
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Caihong Xu

E-Mail Website
Guest Editor
Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
Interests: silicon-based polymers; polymer precursors for advanced ceramics; elemental organic functional materials
Prof. Dr. Chunming Cui

E-Mail Website
Guest Editor
Nankai University, China
Interests: silicon; boron; main group chemistry; organometallics; catalysis

Special Issue Information

Dear Colleagues,

The international symposium on silicon chemistry (ISOS) represents the highest level of international conferences regarding worldwide research and technical developments in the area of silicon and organosilicon chemistry. ISOS is held triennially at various places around the world. The 1st ISOS was held in 1964, and ISOS has been successfully held 17 times. The 18th ISOS (ISOS-XVIII) will be hosted by Shandong University in China. Meanwhile, the 6th Asian Silicon Symposium (ASiS-6) will be jointly held with this symposium. ISOS XVIII JINAN 2017 and ASiS-6 will bring together scientists, industrial researchers, and students from around the globe in order to present and discuss the latest and most exciting aspects of silicon, organosilicon chemistry, and related materials. This symposium is also beneficial for expanding the application prospects of silicone technology, and promotes the advancements of science, technology, and industry.

The Special Issue will focus on progress in silicon and organosilicon chemistry. Welcome submission of unpublished original work on silicon, organosilicon chemistry and related materials. The manuscript submission dealine is set for 30 September 2017.

For more details on ISOS-XVIII and ASiS-6, please click on: http://www.isos2017.cn.

Prof. Dr. Shengyu Feng
Prof. Dr. Qingzeng Zhu
Prof. Dr. Caihong Xu
Prof. Dr. Chunming Cui
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. Molecules 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

  • Silicon
  • Siloxane
  • Organosilicone
  • Organosilicon Chemistry
  • Polysiloxane
  • Silsequioxane
  • Silane

Related Special Issues

Published Papers (4 papers)

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Research

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2335 KiB  
Article
Incorporating Methyl and Phenyl Substituted Stannylene Units into Oligosilanes. The Influence on Optical Absorption Properties
by Filippo Stella, Christoph Marschner and Judith Baumgartner
Molecules 2017, 22(12), 2212; https://0-doi-org.brum.beds.ac.uk/10.3390/molecules22122212 - 12 Dec 2017
Cited by 2 | Viewed by 3706
Abstract
Molecules containing catenated heavy group 14 atoms are known to exhibit the interesting property of σ-bond electron delocalization. While this is well studied for oligo- and polysilanes the current paper addresses the UV-absorption properties of small tin containing oligosilanes in order to evaluate [...] Read more.
Molecules containing catenated heavy group 14 atoms are known to exhibit the interesting property of σ-bond electron delocalization. While this is well studied for oligo- and polysilanes the current paper addresses the UV-absorption properties of small tin containing oligosilanes in order to evaluate the effects of Sn–Si and Sn–Sn bonds as well as the results of substituent exchange from methyl to phenyl groups. The new stannasilanes were compared to previously investigated oligosilanes of equal chain lengths and substituent pattern. Replacing the central SiMe2 group in a pentasilane by a SnMe2 unit caused a bathochromic shift of the low-energy band (λmax = 260 nm) of 14 nm in the UV spectrum. If, instead of a SnMe2, a SnPh2 unit is incorporated, the bathochromic shift of 33 nm is substantially larger. Keeping the SnMe2 unit and replacing the two central silicon with tin atoms causes shift of the respective band (λ = 286 nm) some 26 nm to the red. A similar approach for hexasilanes where the model oligosilane [(Me3Si)3Si]2(SiMe2)2 (λmax = 253 nm) was modified in a way that the central tetramethyldisilanylene unit was exchanged for a tetraphenyldistannanylene caused a 50 nm bathochromic shift to a low-energy band with λmax = 303 nm. Full article
(This article belongs to the Special Issue Progress in Silicon and Organosilicon Chemistry)
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2437 KiB  
Article
Synthesis of Siloxyalumoxanes and Alumosiloxanes Based on Organosilicon Diols
by Galina Shcherbakova, Pavel Storozhenko and Alexander Kisin
Molecules 2017, 22(10), 1776; https://0-doi-org.brum.beds.ac.uk/10.3390/molecules22101776 - 20 Oct 2017
Cited by 1 | Viewed by 3969
Abstract
We have drawn a few interesting conclusions while studying reaction products of Ph2Si(OH)2 with Al(iBu)3 and tetraisobutylalumoxane. In the first place, this is the production (at a Ph2Si(OH)2 and Al(iBu)3 equimolar [...] Read more.
We have drawn a few interesting conclusions while studying reaction products of Ph2Si(OH)2 with Al(iBu)3 and tetraisobutylalumoxane. In the first place, this is the production (at a Ph2Si(OH)2 and Al(iBu)3 equimolar ratio) of an oligomer siloxyalumoxane structure with alternating four- and six-member rings. In addition, it shows isobutyl and phenyl group migration between aluminum and silicon due to the formation of an intramolecular four-member cyclic complex [Ph2(OH)SiO]Al(iBu)2 → [(iBu)Ph(OH)SiO]Al(iBu)Ph. Ph2Si(OH)2 interaction with Al(iBu)3 not only starts from intramolecular complex production, but the chain is terminated for the same reason, which in the case of the Ph2Si(OH)2 reaction with tetraisobutylalumoxane results in failure of to obtain high-polymer siloxyalumoxane compounds. When Al(iBu)3 interacts with α- and γ-diols, no oligomer compounds are produced. In the Al(iBu)3 reaction with α, γ-diols are created in monomer compounds that are likely to have a cyclic structure. Notably, when Al(iBu)3 interacts with only α-diol, a double excess of Al(iBu)3 allows for full replacement of hydrogen in the α-diol hydroxyl groups by aluminum alkyl residue with 1,3-bis(diisobutylalumoxymethyl)-1,1,3,3-tetramethyldisiloxane production. At an equimolar ratio of initial reagents, the second isobutyl radical at Al does not interact with the second hydroxyl group of α-diol, apparently due to the steric hindrance, and 1-(diisobutylalumoxymethyl)-3-(hydroxymethyl)-1,1,3,3-tetramethyl-disiloxane is produced. Al(iBu)3 reactions with γ-diol also result in monomer compounds, but the presence of a chain consisting of three CH2-groups between Si and the hydroxyl group facilitates interaction between the second hydroxyl group of γ-diol and the second isobutyl radical Al(iBu)3. Tetraisobutylalumoxane reactions with α- and γ-diols result in oligomer compounds. Full article
(This article belongs to the Special Issue Progress in Silicon and Organosilicon Chemistry)
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2074 KiB  
Article
Cs2CO3-Initiated Trifluoro-Methylation of Chalcones and Ketones for Practical Synthesis of Trifluoromethylated Tertiary Silyl Ethers
by Cheng Dong, Xing-Feng Bai, Ji-Yuan Lv, Yu-Ming Cui, Jian Cao, Zhan-Jiang Zheng and Li-Wen Xu
Molecules 2017, 22(5), 769; https://0-doi-org.brum.beds.ac.uk/10.3390/molecules22050769 - 18 May 2017
Cited by 5 | Viewed by 7579
Abstract
It was found that 1,2-trifluoromethylation reactions of ketones, enones, and aldehydes were easily accomplished using the Prakash reagent in the presence of catalytic amounts of cesium carbonate, which represents an experimentally convenient, atom-economic process for this anionic trifluoromethylation of non-enolisable aldehydes and ketones. [...] Read more.
It was found that 1,2-trifluoromethylation reactions of ketones, enones, and aldehydes were easily accomplished using the Prakash reagent in the presence of catalytic amounts of cesium carbonate, which represents an experimentally convenient, atom-economic process for this anionic trifluoromethylation of non-enolisable aldehydes and ketones. Full article
(This article belongs to the Special Issue Progress in Silicon and Organosilicon Chemistry)
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Review

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1481 KiB  
Review
Synthesis and Properties of MQ Copolymers: Current State of Knowledge
by Elena Tatarinova, Nataliya Vasilenko and Aziz Muzafarov
Molecules 2017, 22(10), 1768; https://0-doi-org.brum.beds.ac.uk/10.3390/molecules22101768 - 23 Oct 2017
Cited by 24 | Viewed by 7532
Abstract
In this review, we discuss currently available studies on the synthesis and properties of MQ copolymers. The data on methods of producing hydrolytic and heterofunctional polycondensation of functional organosilanes as well as the obtaining MQ copolymers based on silicic acids and nature silicates [...] Read more.
In this review, we discuss currently available studies on the synthesis and properties of MQ copolymers. The data on methods of producing hydrolytic and heterofunctional polycondensation of functional organosilanes as well as the obtaining MQ copolymers based on silicic acids and nature silicates are considered. The ratio of M and Q monomers and the production method determine the structure of MQ copolymers and, accordingly, their physicochemical characteristics. It is shown that the most successful synthetic approach is a polycondensation of organoalkoxysilanes in the medium of anhydrous acetic acid, which reduces the differences in reactivity of M and Q monomers and leads to obtaining a product with uniform composition in all fractions, with full absence of residual alkoxy-groups. The current concept of MQ copolymers is that of organo-inorganic hybrid systems with nanosized crosslinked inorganic regions limited by triorganosilyl groups and containing residual hydroxyl groups. The systems can be considered as a peculiar molecular composites consisting of separate parts that play the role of a polymer matrix, a plasticizer, and a nanosized filler. Full article
(This article belongs to the Special Issue Progress in Silicon and Organosilicon Chemistry)
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