Reflection absorption infrared study of the adsorption of dimethylamine on copper (1 1 0) and nickel (1 1 1) surfaces |
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Authors: | S Chalker TS Nunney |
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Institution: | Surface Science Research Centre, University of Liverpool, Oxford Street, Liverpool, L69 3BX, UK |
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Abstract: | The adsorption of dimethylamine on Cu(1 1 0) and Ni(1 1 1) has been studied by reflection absorption infrared spectroscopy. For Cu(1 1 0), adsorption was molecular at 80 and 300 K and for submonolayer dimethylamine the appearance of A′ and not A″ modes indicated Cs symmetry. Similar bonding was found for Ni(1 1 1) at 170 K. Annealing the adlayer to 350 K resulted in the formation of a new species on Ni(1 1 1), similar to that which has been identified as methylaminocarbyne on Pt(1 1 1). In contrast only molecular dimethylamine was identified on Cu(1 1 0), with H-bonded interactions at high coverage and a potential surface dimer. |
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Keywords: | Reflection absorption infrared spectroscopy Chemisorption Hydrogen-bonding Dimerization Copper Nickel Dimethylamine Methylaminocarbyne |
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