Compounds of formula corresponding to either formula or : . The water control fixture includes at least one operating valve disposed in the housing for controlling a flow of water from the hot water inlet port to the fixture outlet port, and a bypass valve disposed in the housing for controlling a flow of water through a bypass path between the hot water inlet port and the bypass port. As a result, undesired printing in the surface of the substrate may be minimized. In addition, these additives can improve the charge injection and power efficiency of light emitting devices manufactured from the screen printable electroluminescent polymer ink.