Silicon-oxygen-bonded oligomers having thermoelectric switching properties

The electrical properties of siloxane oligomers prepared from the reaction of 1,4-naphthalenediol or 1,4-naphthoquinone with diphenylsilane using diff erent palladium catalysts, such as PdCl2, Pd(TMEDA)Cl-2, Pd(TEEDA)Cl-2 (whe re TMEDA = N,N ' -tetramethylethylenediamine, TEEDA = N,N ' -tetraethylethy lenediamine), are dependent on the catalyst. Thermoelectric switching prope rties can be obtained from the siloxane prepared from the coupling reaction of diphenylsilane with 1,4-naphthoquinone or 1,4-naphthalenediol using Pd( TMEDA)Cl-2 as catalyst. Copyright (C) 2001 John Wiley & Sons, Ltd.