Tetramethylsilane was used as an internal shift standard. Thermal gravimetric analysis (TGA) was performed using a TGA instrument (Mettler-Toledo, TGA/SDTA 851, USA) calibrated with indium.
Tetramethylsilane was used as aninternal shift standard. Thermal gravimetric analysis (TGA)was performed using a TGA instrument (Mettler-Toledo,TGA/SDTA 851, USA) calibrated with indium.