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Stable and reactive nonlinear optical materials are synthesized by reacting heteroatomic chromophores with polymer backbone. Polymeric materials are now being used for nonlinear optical devices because of their low costs. A typical NLO material includes an electron-accepting group, a bridge and an eletron-donating group. Spectral analysis of a NLO material show that the charge-transfer transition depends on stilbene skeleton and its substituents. The material could be inserted in polymeric matrices by host-guest systems, side-chain, main-chain and cross linked polymers.