Cl. Yang et al., SYNTHESIS AND 3RD-ORDER OPTICAL NONLINEARITY OF ORGANOMETALLIC SALTS(CPFEBZ)(N)M(L)(2) (L = MNT OR DMIT), Huaxue xuebao, 55(9), 1997, pp. 846-852
Two series of new organometallic salts (CpFeBz)(n)M(mnt)(2) and (CpFeB
z)(n)M(dmit)(2) (M = Ni, Pd, Pt, Cu or Co; Cp = Cyclopentadienyl, Bz =
Benzene, H(2)mnt = maleonitriledithiol; H(2)dmit = 4,5 - dimercapto -
1,3 - dithiole - 2 - thione, n = 1 or 2) were synthesized by metathet
ical reaction. They were characterized by EA, LR and H-1 NMR. The thir
d - order optical nonlinearity of organometallic salts was studied by
DFWM method for the first time. These molecules exhibit second hyperpo
larizability which is in the order of 10(-30)esu. The results also sho
w that the nonlinearity mainly comes from the contribution of the plan
ar conjugated anions.