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antonio-carella
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BackCover: Second order NLO properties oftwo series of copolymers were investigated.The figure on the cover shows that chromo-phores with an ethyl substituent on the imi-dazole unit give polymers with better NLO
performances. Further details can be foundin the Full Paper by A. Carella, R. Centore,*P. Riccio, A. Sirigu, A. Quatela, C. Palazzesi,and M. Casalboni on page 1399.