Abstract: A compound of Formula I, is provided. In Formula I, one of Z1, Z2, and Z3 is N and the remainder are C; each of L1 and L2 is independently selected from a direct bond and a linking group; at least one of R1, R2, RA, RB, RC, RD, and RE comprises a group R* having a structure selected form the group consisting of Formula II, -Q(R3)(R4)a(R5)b, Formula III, and Formula IV, Each R, R?, R?, R1, R2, R3, R4, R5, RA, RB, RC, RD, RE, RF, RG, and RH is independently hydrogen or a General Substituent, with the proviso that group R* is not adamantyl. Formulations, OLEDs, and consumer products containing the compound are also provided.

Abstract: High performance, light-weight skate wheels are produced with special permeable cores and without air bubbles for in-line roller skates to attain greater strength, speed, maneuverability and control. In order to facilitate rotation, one or more bearings are seated in the hub of the gas permeable core. The gas permeable core which is preferably made of high-impact plastic can be reinforced with fibers. The gas permeable core can also comprise complementary core sections and can have an array of spokes which connect a hub and an inner rim. In the preferred form, the gas permeable core has an outer portion providing a hollow shell upon which a high performance non-pneumatic tire is secured. In order to prevent air bubbles from forming in the solidified core during molding, the core is formed with gas passageways, such as vent holes, openings, tunnels, air channels, micropores or apertures. Preferably, the micropores or apertures are formed in the tire-engaging surface of the gas permeable core.

Abstract: A set of high speed, light weight wheels are provided for in-line roller skates. The high performance wheels each have a single large, light weight bearing, a special hub with a light weight fiber-reinforced core, and a high strength tire.

Abstract: High speed, light weight wheels are provided for in-line roller skates. The high performance wheels each have at least one bearing, a special hub with a light weight fiber-reinforced core, and a high performance tire. The core can comprise symmetrical core sections and can have an array of spokes which connect a hub and an inner rim. Desirably, the light weight core can have a hollow shell upon which the tire is secured.