We have determined the azimuthal orientation of an adsorbate on a metal surface from an intramolecular-transition-derived feature in reflectance anisotropy spectroscopy (RAS). Adsorption of 9-anthracene carboxylic acid onto $p(2\times 1)\mathrm{O}/\mathrm{Cu}\left(110\right)$ led to an ordered structure with a strong (2%), derivativelike feature at 4.5 eV. Fresnel theory predicts the measured intensity, functional behavior, and sense of the RAS signal for the molecule aligned along [110]. IR measurements confirm that the molecular plane is perpendicular to the surface and STM measurements support the azimuthal orientation. We reassign the sense of the clean Cu(110) surface RA spectrum.

Silver–gold BNPs with enhanced catalytic activity in the sodium borohydride mediated reduction of 4-nitrophenol were synthesized using a modified galvanic replacement reaction between F127 stabilized silver NPs and HAuCl₄.