Status: Bibliographieeintrag
Standort: ---
Exemplare:
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| Online-Ressource |
Verfasst von: | Shao, Guang [VerfasserIn]  |
| Gleiter, Rolf [VerfasserIn]  |
Titel: | Synthesis and spectroscopic studies of Arylethynylsilanes |
Verf.angabe: | Guang Shao, Akihiro Orita, Koji Nishijima, Kanako Ishimaru, Makoto Takezaki, Kan Wakamatsu, Rolf Gleiter, and Junzo Otera |
Umfang: | 10 S. |
Fussnoten: | Gesehen am 28.09.2017 |
Titel Quelle: | Enthalten in: Chemistry |
Jahr Quelle: | 2007 |
Band/Heft Quelle: | 2(2007), 4, S. 489-498 |
ISSN Quelle: | 1861-471X |
Abstract: | A variety of arylethynylsilanes (Ar-CCC6H4CC)nSiMe4−n were prepared successfully by reaction of the corresponding chlorosilanes Me4−nSiCln with ArCCC6H4CCM (M=Li, MgBr), which was prepared by treatment of ethynyl(diarylethyne)s ArCCC6H4CCH with BuLi or MeMgBr. The ethynyl(diarylethyne)s were readily prepared in good yields by the double-elimination method: addition of lithium hexamethyldisilazide to a mixture of ArCH2SO2Ph, TMSCCC6H4CHO, and ClP(O)(OEt)2, followed by desilylation. In the tetrakis(arylethynyl)silanes (ArCCC6H4CC)4Si thus prepared, through-space conjugation of four triple bonds on the silicon atom emerges as a result of participation of the silicon orbitals in the acetylenic π orbitals. This participation enhances the emissive quantum yields of arylethynylsilanes with an increase in the number of arylethynyl moieties on silicon: quantum yields of emission (ΦF) of 0.72 for (MeOC6H4CCC6H4CC)4Si, 0.53 for (MeOC6H4CCC6H4CC)2SiMe2, and 0.47 for MeO-C6H4CCC6H4CCSiMe3 were obtained. Although this enhancement effect was also observed in the phenylethynylarylsilane (MeOC6H4CCC6H4)2SiMe2, the bis(arylethynyl)disilane (MeOC6H4CCC6H4CC-SiMe2)2 exhibited non-enhanced emission. |
DOI: | doi:10.1002/asia.200700007 |
URL: | Bitte beachten Sie: Dies ist ein Bibliographieeintrag. Ein Volltextzugriff für Mitglieder der Universität besteht hier nur, falls für die entsprechende Zeitschrift/den entsprechenden Sammelband ein Abonnement besteht oder es sich um einen OpenAccess-Titel handelt.
Verlag: http://dx.doi.org/10.1002/asia.200700007 |
| Verlag: http://onlinelibrary.wiley.com/doi/10.1002/asia.200700007/abstract |
| DOI: https://doi.org/10.1002/asia.200700007 |
Datenträger: | Online-Ressource |
Sprache: | eng |
K10plus-PPN: | 1563916916 |
Verknüpfungen: | → Zeitschrift |
Synthesis and spectroscopic studies of Arylethynylsilanes / Shao, Guang [VerfasserIn] (Online-Ressource)
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