This paper describes the formation of a porous silver surface by a convenient two-step process involving electrochemical formation of a binary silver-zinc alloy film on a silver surface followed by electrochemical etching of the zinc from the alloy. Both the deposition and the dealloying steps were performed in a single bath of low-temperature zinc chloride-1-ethyl-3-methylimidazolium chloride ionic liquid at temperatures below 150 degrees C without using any other corrosive acids or bases. The effects of the deposited zinc quantity, deposition potential, current, and temperature on the structures and morphologies of the porous silver film were examined. In comparison with conventional molecular electrolyte solutions, ionic liquids provide a more versatile environment for fabricating porous metals. Because the zinc(II) species consumed during the deposition step was recovered during the dealloying step, the ionic liquid is reusable.

Four novel red phosphorescent emitter compounds bis(1-phenylisoquinolinato-N,C 2' )iridium(acetylacetonate), (piq) 2 Ir(acac), bis(1-(1'-naphthyl)isoquinolinato-N,C 2' )iridium(acetylacetonate), (1-niq) 2 Ir(acac), bis(1-(2'naphthyl)isoquinolinato-N,C 2' )iridium(acetylacetonate), (2-niq) 2 Ir(acac) and bis(1-phenyl-5methylisoquinolinato-N,C 2' )iridium(acetylacetonate), (m-piq) 2 Ir(acac), have been synthesized and fully characterized. Electroluminescent devices with a configuration of ITO/NPB/CBP:dopant/BCP/AlQ 3 /Al were fabricated. All devices emitted in the red region with an emission ranging from 624 to 680 nm. (m-piq) 2 Ir(acac) shows a maximum brightness of 17 164 cd m 22 at a current density of J ~300 mA cm 22 and the best luminance efficiency of 8.91 cd A 21 at a current density of J ~20 mA cm 22 . (1-niq) 2 Ir(acac) exhibits pure-red emission with 1931 CIE (Commission International de L'Eclairage) chromaticity coordinates x ~0.701, y ~0.273.

Synthesis of guanidine-linked NHC can be achieved easily through reacting amino-NHC with carbodiimide. Subsequently, guanidine-NHC Ag and Cu complexes were isolated and fully characterized. These Cu complexes are found to be versatile catalysts for hydroboration, semihydrogenation and carboboration of alkynes in a highly stereo- and regioselective fashion.