Fluorescence quenching study on some substituted polysilanes

✍ Scribed by Fenglian Bai; Yiming Mo; Zhuting Wang; Deben Chen; Gaoquan Li; Huiping Hu

• Publisher: John Wiley and Sons
• Year: 1996
• Tongue: English
• Weight: 270 KB
• Volume: 7
• Category: Article
• ISSN: 1042-7147
• DOI: 10.1002/(sici)1099-1581(199602)7:2<92::aid-pat442>3.0.co;2-8

✦ Synopsis

The fluorescence spectra of polysilanes can be quenched by halohydrocarbons. The quenching processes are not simple diffusion-controlled processes but involve both dynamic and static quenching processes. The fluorescence of some electron-accepting compounds can be quenched by polysilanes. The quenching mechanism is mainly caused by charge transfer interaction between ji'uorophores and quenchers. All the results proved that the rapid energy migration along the polysilane main chain does really exist in the excited state whether it is homopolymer or copolymer.

coupled, but which communicate through very rapid energy migration. Most of the polysilanes are thermally stable but photochemically labile, and they produce lower molecular weight products when they are irradiated. This property has led to the active research of applications in the photoinitiation of vinyl polymerization, electrical conduction, photoconduction, microlithography, nonlinear optical properties and so on [3]. Our interest lies with the electronic structure study of polysilanes by fluorescence quenching methods. The results of this work may provide some points for the selection of photosensitizers, dopants for polysilanes in the photoresist and photoconductor application research.