Poly(dibenzosilole)s

Wong, Wallace W. H.; Holmes, Andrew B.

doi:10.1007/12_2008_148

Cited by 11 publications

(14 citation statements)

References 45 publications

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“…Recently, accumulated lines of evidence suggest that SP provide cardioprotection for stroke survivors and nonischemic dilated cardiomyopathy patients [21,22]. Consistent with these previous findings, our results demonstrated that SP pretreatment significantly ameliorated prolongation of QTc and cardiac function in DOX-treated rats, confirming its cardioprotection property.…”

Section: Discussionsupporting

confidence: 91%

Spironolactone Attenuates Doxorubicin‐induced Cardiotoxicity in Rats

Liu

Wang

et al. 2016

Cardiovascular Therapeutics

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Section: Discussionsupporting

confidence: 91%

Spironolactone Attenuates Doxorubicin‐induced Cardiotoxicity in Rats

Liu

Wang

et al. 2016

Cardiovascular Therapeutics

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“…Silicon-bridged phenylthiophenes were faintly fluorescent in solution and in the solid state. The weak fluorescence of 5,7-dihydro-5,5,7,7-tetrakis(1-methylethyl)bis [1]benzosilolo[2,3-b:3',2'-d]thiophene (5) was attributed to intersystem crossing from S 1 to T 1 , which was confirmed by the observation of the green phosphorescence at 77 K. In contrast, indole-and benzosilole-fused dibenzosiloles 6 and 7 exhibited violet fluorescence in a microcrystalline state with excellent quantum yields. The high efficiency of solid-state violet fluorescence makes the dibenzosiloles very attractive candidates for OLED applications [56].…”

Section: Resultsmentioning

confidence: 99%

“…Yield: 77 %, a colorless solid. Mp: 203.0-203.8 °C.TLC: R f 0.58 (hexane/AcOEt 10:1) 1. H NMR (400 MHz, CDCl 3 ):  1.09 (d, J = 7.3 Hz, 12H), 1.10 (d, J = 7.5 Hz, 12H), 1.44 (qq, J = 7.5, 7.3 Hz, 4H), 7.25 (dt, J = 7.1, 0.7 Hz, 2H), 7.44 (dt, J = 7.5, 1.3 Hz, 2H), 7.62 (d, J = 7.0 Hz, 2H), 7.89 (d, J = 7.9 Hz, 2H), 8.04 (s, 2H); 13 C NMR (100 MHz, CDCl 3 ):  11.3, 18.3, 18.4, 120.5, 125.4, 126.6, 129.8, 133.5, 136.2, 138.3, 147.4, 148.9.…”

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confidence: 99%

Photophysical properties of heteroaromatic ring-fused (di)benzosiloles

et al. 2011

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Benzosiloles fused to heterocycles such as thiophene, benzothiophene, and benzofuran, and indole-and benzosilole-fused dibenzosiloles were prepared by palladium-catalyzed intramolecular coupling of the corresponding 2-(arylsilyl)aryl triflates in good to high yields. Molecular and crystal structures of 5,7-dihydro-5,5,7,7-tetrakis(1-methylethyl)bis[1]benzosilolo-[2,3-b:3', 2'-d]thiophene, 6-methyl-12,12-diisopropyl-12H-indololo[3,2-b][1]silafluorene, and 5,5,11,11-tetraisopropyl-5,11H-benzosilolo[3,2-c]silafluorene were determined by X-ray diffraction analysis. The UV absorption spectra of the (di)benzosilole derivatives in cyclohexane red-shifted when compared to 1,1-diisopropyldibenzosilole, indicating that replacing a benzene ring of dibenzosilole by the heterocycles as well as fusion of indole and benzosilole moieties onto dibenzosilole narrowed the HOMO-LUMO gaps of the -conjugation system. The thiophene-fused benzosiloles were faintly fluorescent in solution and in the solid state, whereas the dibenzosiloles exhibited luminescence with moderate and high quantum yields in cyclohexane and in microcrystals, respectively. In other words, aggregation-induced emission was observed for the dibenzosiloles. Notably,5,5,11,silafluorene in microcrystals exhibited violet fluorescence ( max = 396 nm) with a quantum yield of 0.70. Density functional theory (DFT) calculations of the prepared (di)benzosiloles were also performed. absorption, benzosilole, fluorescence, silicon, solid-state emission

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“…A benzosilole is an attractive compound due to its emission property and potential use as of optical materials [1][2][3][4]. These features are associated with the low-lying LUMOs of the siloles, which originate from orbital interaction between the σ* orbital of the silylene moiety and the π* orbital of the butadiene moiety [5].…”

Section: Introductionmentioning

confidence: 99%

Intramolecular Chain Hydrosilylation of Alkynylphenylsilanes Using a Silyl Cation as a Chain Carrier

et al. 2016

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Diorganyl[2-(trimethylsilylethynyl)phenyl]silanes 1a-c and methyl-substituted phenylsilanes 1d and 1e were treated with a small amount of trityl tetrakis(pentafluorophenyl)borate (TPFPB) as an initiator in benzene to afford the corresponding benzosiloles (2a-e) in moderate to good yields. However, no reaction was observed for the reaction using [2-(1-hexynyl)phenyl]diisopropylsilane lf. The methyl substituent was tolerated under the reaction conditions and increased the yield of the corresponding benzosilole depending on the substitution position. From the result using 1f, the current reaction was found to require the trimethylsilyl group, which can stabilize intermediary alkenyl carbocations by the β-silyl effect. The current reaction can be considered an intramolecular chain hydrosilylation of alkynylarylsilanes involving silyl cations as chain carriers. Therefore, the silyl cations generated by hydride abstraction from hydrosilanes 1 with the trityl cation causes intramolecular electrophilic addition to the C-C triple bond to form ethenyl cations, which abstract a hydride from 1 to afford benzosiloles 2 with the regeneration of the silyl cations.

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Poly(dibenzosilole)s

Cited by 11 publications

References 45 publications

Spironolactone Attenuates Doxorubicin‐induced Cardiotoxicity in Rats

Spironolactone Attenuates Doxorubicin‐induced Cardiotoxicity in Rats

Photophysical properties of heteroaromatic ring-fused (di)benzosiloles

Intramolecular Chain Hydrosilylation of Alkynylphenylsilanes Using a Silyl Cation as a Chain Carrier

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