Toshiki Tsubota, T. Ohno, H. Yoshida
Apr 1, 2006
Citations
0
Influential Citations
16
Citations
Journal
Diamond and Related Materials
Abstract
Abstract Chemical reaction of hydrogenated diamond surface with nitrobenzoic acid (NO 2 -C 6 H 4 -COOH) and the radical species was investigated. The IR peak assigned to the NO 2 group appeared after the reaction process. The peak intensity of the NO 2 group depended on the steric structure of the reacted nitrobenzoic acid. The NO 2 peak intensity of the diamond reacted with p -nitrobenzoic acid is much smaller than that of the diamond reacted with o -, or m -nitrobenzoic acid. In this study, 3,4-dinitorobenzoic acid or 3,5-dinitorobenzoic acid was also used. The IR spectra for the diamond treated with 3,4-dinitorobenzoic acid were unclear. On the other hand, the IR spectra for the diamond treated with 3,5-dinitorobenzoic acid showed the peak assigned to the NO 2 group. From the experimental results, we may assume that the NO 2 group at para-position against the COOH group hindered the reaction of the COOH group with diamond surface. The NO 2 peak intensity for the diamond treated with 3,5-dinitorobenzoic acid was comparable with that for the diamond treated with o - or m -nitrobenzoic acid. These results should means that the amount of the NO 2 group introduced on diamond surface was comparable. The introduction of NO 2 group on diamond surface was realized by the method applied in this study.