The quenching rate constants of CH(A and B) by alcohol Molecules were measured by using laser photolysis (at 266nm) of CHBr3 to produce CH(A,B) and the observation oftime resolved fluorescence CH(A,B→X) methods. The measured results are as follows (units of kq in 10^-^1^0cm^3.molecule^-^1.s^-^1; the uncertainty is a standard deviation of least-squares fitting): A discussion of the effect of OH group in alcohol on the quenching of CH(A,B) is presented based on the collision complex model.

Key words: ALCOHOL, KINETIC STUDY, QUENCHING, COLLISON