作者:Sang Ho Lee、Bo-Bin Jang、Zakya H. Kafafi
DOI:10.1021/ja042762q
日期:2005.6.1
tetrachloride. These novel spiro-linked silacyclopentadienes (siloles) form transparent and stable amorphous films with relatively high glass transition temperatures (T(g) = 203-228 degrees C). The absorbance spectrum of each compound shows a significant bathochromic shift relative to that of the corresponding carbon analogue as a result of the effective sigma-pi conjugation between the sigma orbital of the exocyclic
一系列四种不对称芳基取代的 9,9'-spiro-9-silabifluorene (SSF) 衍生物,2,2'-di-tert-butyl-7,7'-diphenyl-9,9'-spiro-9- silabifluorene (PhSSF), 2,2'-di-tert-butyl-7,7'-dipyridin-2-yl-9,9'-spiro-9-silabifluorene (PySSF), 2,2'-di-tert-丁基-7,7'-dibiphenyl-4-yl-9,9'-spiro-9-silabifluorene (BPhSSF), 和 2,2'-di-tert-butyl-7,7'-bis(2',2 ' '-bipyridin-6-yl)-9,9'-spiro-9-silabifluorene (BPySSF) 是通过相应的 2,2'-二硫代联苯与四氯化硅环化制备的。这些新型螺连接