Synthesis and Nonlinear-Optical Properties of Vinyl-Addition Poly(norbornene)s
摘要:
Vinyl-addition poly(norbornene) copolymers functionalized with nonlinear optical chromophore side groups have been prepared using (eta(6)-toluene)Ni(C6F5)(2), and their electrooptic properties have been characterized. The nickel complex used to polymerize the norbornene monomers is tolerant to many functional groups found in nonlinear optical chromophores although nitriles and amines other than trisubstituted amines strongly inhibit the reaction. A vinyl-addition copolymer of hexylnorbornene and a norbornene-functionalized Disperse Red 1 chromophore was scaled up and studied in detail. Initial studies indicate that electric field poling is effective but that relaxation of polar order in the poly(norbornene) is faster than in a comparable methacrylate copolymer.
Thermally Stable, Dye-Bridged Nanohybrid-Based White Light-Emitting Diodes
作者:Seung-Yeon Kwak、SeungCheol Yang、Na Ree Kim、Jae Hong Kim、Byeong-Soo Bae
DOI:10.1002/adma.201103077
日期:2011.12.22
Thermally stable red and green light-emitting nanohybrids are introduced as an organic luminescent converter with broad color tunability and a high color rendering index for white light-emitting diodes (LEDs). Nanohybrid-based white LEDs are thermally stable and the color coordination is not changed by heat exposure.