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مقالات شیمیایی 2013
جزئیات رویداد
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همایش ، رویداد ، ژورنال
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  • spectral characterisation of new organic fluorescent dyes with an alkoxysilane moiety and their utilisation for the labelling of layered silicates

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    • تاریخ ارائه: 1392/07/24
    • تاریخ انتشار در تی پی بین: 1392/07/24
    • تعداد بازدید: 807
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
     new fluorescence dyes with an alkoxysilane moiety were synthesised by the condensation of 3-(triethoxysilyl)-1-propanamine (3-aminopropyltriethoxysilane) with 4,10-benzothioxanthene-3,1′-dicarboxylic acid anhydride (btxa) and n,n-dimethylaminonaphthalene-1,8-dicarboxylic acid anhydride (dmana), which was accompanied by the formation of an imidic bridge. the compoundsn-(3-(triethoxysilyl)propyl)-thioxantheno[2,1,9-dej]isoquinoline-1,3-dione (btx-s) and 4-(n′, n′-dimethyl)-n-(triethoxysilyl)propyl-1,8-naphthalene dicarboxylic acid imide (dman-s) were characterised by steady-state and time-resolved fluorescence spectroscopy in chloroform and ethanol. both conjugates (btx-s and dman-s) exhibited absorption and emission bands in the same region as the un-substituted btxa and dmana. an important stokes shift was observed for dman-s in ethanol. a high fluorescence quantum yield was observed for btx-s in both solvents and for dman-s in chloroform. in addition, the newly developed fluorescent silane dyes were covalently attached to the microscopic particles of layered silicates and on the surface of sio2 wafers as a proof of concept for fluorescence particle (surface) visualisation. the surface wafer modification was precisely characterised by x-ray photoelectron spectroscopy (xps). successful covalent linkage onto the particles of layered silicates was proved by confocal laser scanning microscopy technique.

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