Fluorescence behaviour of pyrene substituted tri- and hexa-silanes

✍ Scribed by D. Declercq; F.C. De Schryver; R.D. Miller

• Publisher: Elsevier Science
• Year: 1991
• Tongue: English
• Weight: 402 KB
• Volume: 186
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(91)90453-g

✦ Synopsis

The absorption and emission spectra of pyrene substituted tri-and hexa-silanes are reported. o(Si-Si) +rc*(pyrene) chargetransfer fluorescence is observed for I-( I-pyrenyl) tridecamethylhexasilane but not for I -( 1 -pyrenyl)hepta-methyltrisilane. This is explained by the difference in oxidation potential of the tri-and hexa-silane chain. The emission of the bichromophoric systems 1,6-di ( I-pyrenyl)dodecamethylhexasilane and I-(4_N,Ndimethylanilino)-6-( I-pyrenyl)dodecamethylhexasilane is mainly determined by the u+z* charge transfer. 1,3-di-( I-pyrenyl)hexamethylhexasilane and l-(4-N,Ndimethylanilino)-3-( l-pyrenyl)hexamethyltrisilane show respectively excimer and exciplex emission.