Pc. Ray et Pk. Das, FIRST-ORDER HYPERPOLARIZABILITIES AND PK(A) OF WEAK ORGANIC-ACIDS IN PROTIC SOLVENTS ARE LINEARLY RELATED, Current Science, 68(5), 1995, pp. 526-528
Second-order nonlinearities (beta) of five weak organic acids in proti
c solvents have been measured by the double-quantum Rayleigh scatterin
g (DRS) technique. beta is found to bear a linear relationship to the
pK(a) of these compounds in those solvents. A direct implication of th
is observation is that the DRS technique can be used to determine the
pK(a) of weak organic acids in any solvent.