Publication: Symmetry driven: The synthesis of co-substituent octasilsesquioxanes
Issued Date
2021-08-21
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ISSN
13699261
11440546
11440546
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2-s2.0-85112379028
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Mahidol University
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SCOPUS
Bibliographic Citation
New Journal of Chemistry. Vol.45, No.31 (2021), 14141-14148
Suggested Citation
Nicha Prigyai, Supphachok Chanmungkalakul, Mongkol Sukwattanasinitt, Vuthichai Ervithayasuporn Symmetry driven: The synthesis of co-substituent octasilsesquioxanes. New Journal of Chemistry. Vol.45, No.31 (2021), 14141-14148. doi:10.1039/d1nj02381k Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/76513
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Title
Symmetry driven: The synthesis of co-substituent octasilsesquioxanes
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Abstract
Octasilsesquioxane cages with co-substituent characteristics were synthesized through polyhydrolytic-condensation reactions involving two mixed monomers, namelyi-butyl(triethoxysilane) and organotrialkoxysilanes (e.g., phenyl, vinyl, ethyl, propyl, and 3-chloropropyl groups). Only mild and simple methods were required to obtain crystalline products as all products consisted octameric silsesquioxane (T8) cubes with normal distribution betweeni-butyl and other substituents. The formation was confirmed by NMR and ESI-MS spectra. Thei-butyl group on the silane monomer was not only a controller to yield cage-like structural products with mixed substituents, but also their highly symmetricalOhin the cubic Si-O core, which drives the product separation through crystallization. The crystalline structure of the products was validated by the correlation between the endothermic peak at the melting temperature (Tm) from the DSC analysis and sharp peaks observed in the XRD diffraction patterns.