Adsorption Structure of Hydromuconic Acid on Cu(110) Surface

Abstract

  We have investigated thermal stability and adsorption structure of trans-beta-hydromuconic acid (HOOC-CH2-CH=CH-CH2-COOH) on Cu(110) surface as a function of sample temperature using Temperature Programmed Desorption (TPD), Low Energy Electron Diffraction (LEED) and Fourier Transform Infrared Absorption Spectroscopy (IRAS). From 350 to 500 K, hydromuconic acid adsorbed as monohydromuconiate (HOOC-CH2-CH=CH-CH2-COO^-) form, corresponding to the structure of c(2×2). As the temperature increases to about 600 K, monohydromuconiate changes to bihydromuconiate (^-OOC-CH2-CH=CH-CH2-COO^-) corresponding to the structure of p(1×2) or p(6×2). Bihydromuconiate structure decomposed at around 600 K.