A series of novel derivatives with giant second hyperpolarizabilities, based on radiaannulenes, tetrathiafulvalene, nickel dithiolene, and their lithiated analogues

1. Avramopoulos, A.
2. Reis, H.
3. Otero, N.
4. Karamanis, P.
5. Pouchan, C.
6. Papadopoulos, M.G.