Optically non-linear active waveguiding material comprising donor and acceptor groups-containing triphenylcarbinols.

摘要

The invention relates to an optically non-linear active waveguiding material comprising an optically transparent polymer and a donor group and acceptor group-containing triphenylcarbinol as a dopant. Said dopants have a high hyperpolarisability and have a charge-transfer absorption band which is about the same as that of their corresponding compounds having only one donor- pi -acceptor unit. The triphenylcarbinols were found to display good solubility in polymers. Nitro-functionalised triphenylcarbinols are preferred because of their charge-transfer absorption band at a low wavelength ( lambda max at about 290 nm). Aldehyde-functionalised calix(4)arenes were also found to have this low wavelength charge-transfer absorption band ( lambda max at about 270 nm). Triphenyls comprising stilbene donor- pi -acceptor units are preferred because of their high hyperpolarisability.