Thermal analysis of hydrosilylation of 1-dodecene on porous silicon surface

Hydrosilylation of 1-dodecene on porous silicon surface has been studied by calorimetric methods. Using unpurified and purified 1-dodecene, it was possible to distinguish the reactions arising from oxidation from those due to hydrosilylation reactions. A surprising change from an exothermic reaction to an endothermic one was observed above 130 °C. A possible origin for this has been proposed, based on breaking of the double bond in the 1-dodecene molecule leaving CH_x-termination on the PSi surface. The density functional calculations and measured FTIR spectra are presented as supporting evidence for the explanation given.