Pc. Ray et Pk. Das, FIRST-ORDER HYPERPOLARIZABILITIES OF OCTUPOLAR AROMATIC-MOLECULES - SYMMETRICALLY SUBSTITUTED TRIAZINES, Chemical physics letters, 244(1-2), 1995, pp. 153-156
The first hyperpolarizabilities of some symmetrically substituted tria
zines have been measured and compared with those of the corresponding
symmetrically substituted benzenes. The octupolar triazines have highe
r quadratic polarizabilities than the corresponding octupolar benzenes
. The triazine ring seems to be a better central acceptor than the ben
zene ring, but if it acts as a donor as in sym-triphenyl triazine, the
nonlinearity improves further.