�A�j�����͐��n�t���C��N��d����Ԃɂ����Ė�60�s�R�b�Ńv���g���𗣔������N�������Ƃ����������ɂ����ɕ񍐂���Ă���B����C�A�j�����̃I���g�ʂɃ��`�����u�������U���̂�o-toluidine��2,6-xylidine�ɂ‚��Ď������s�����Ƃ���C���`����̑����ɔ����v���g���𗣑��x���������x���Ȃ邱�Ƃ������o���ꂽ�B�v���g���𗣑��x���x�z������q�Ƃ̊֘A�ɂ‚��ĕ񍐂���B

We have reported that aniline in the excited singlet state releases a proton with a rate constant of 60ps in aqueous solution. In this study, we found that the proton dissociation rates of aniline derivatives, o-toluidine and 2,6-xylidine, were much slower than that of aniline because of the effects of o-methyl group(s).