Optically non-linear active waveguiding material comprising...

C - Chemistry – Metallurgy – 08 – K

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C08K 5/00 (2006.01) G02F 1/35 (2006.01) G02F 1/361 (2006.01)

Patent

CA 2130283

ABSTRACT 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-?-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 (Amax at about 290 nm). Aldehyde-functionalised calix(4)arenes were also found to have this low wavelength charge-transfer absorption band (Amax at about 270 nm). Triphenyls comprising stilbene donor-?-acceptor units are preferred because of their high hyperpolarisability.

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