Chemical reaction of hydrogenated diamond surface with peroxide radical initiators

摘要

The reactivity of hydrogenated diamond surfaces with peroxide radical initiators such as benzoyl peroxide, lauroyl peroxide, dicumyl peroxide and di-t-butyl peroxide was investigated in this study. With benzoyl peroxide as the radical initiator, the intensity of the peaks assigned to the aliphatic C-H stretching vibration decreased with increasing reaction time, as well as with increasing amount of benzoyl peroxide. Moreover, peaks assigned to the aromatic C-H and C=O stretching vibrations appeared following the reaction. For the reaction with lauroyl peroxide, the area under the peaks assigned to the C-H bond increased with treatment time and amount of lauroyl peroxide, and a C=0 stretching vibration peak appeared. The shape of the IR spectra of diamond powder treated with dicumyl peroxide or di-t-butyl peroxide is virtually the same as that of hydrogenated diamond powder surface.