Preparation of substituted network polysilanes by a disproportionation reaction of ethoxydisilane initiated by a small amount of organolithium reagents

✍ Scribed by Keiji Kabeta; Shigeru Wakamatsu; Takafumi Imai

• Book ID: 102659047
• Publisher: John Wiley and Sons
• Year: 1997
• Tongue: English
• Weight: 721 KB
• Volume: 35
• Category: Article
• ISSN: 0887-624X
• DOI: 10.1002/(sici)1099-0518(199702)35:3<455::aid-pola8>3.0.co;2-r

✦ Synopsis

Network methylethoxypoly silanes containing various substituents such as phenyl, butyl, phenylene, thiophene, and anthracene groups were prepared by a dlsproportionation reaction of 1,1,2,2-tet raethoxy -1,2-dimethyldisilane initiated by addition of a small amount of organolithium reagents that have the corresponding substituents. The reaction was considered to be catalyzed by lithium etboxide, which was formed by the substitution reaction of the ethoxydisilane with the lithium reagents. Both the substituted and pristine disilanes participated in tbe disproportionation reaction to yield the network polysilanes. The amount of the substituents and the molecular weight of the polysilanes varied, depending on what and how much of the lithium reagent were used. Tbe electrical conductivity of some polysilanes was measured, and polymers with thiophene or anthracene groups were found to show relatively higher conductivity of 10-4 Scm-' after iodine doping. c ]997 -John W'iley & Sons, Inc.