DETERMINING THE BONDING ORIENTATION OF MOLECULAR ADSORBATES ON METAL-SURFACES BY ANGLE-RESOLVED PHOTOEMISSION

The application of symmetry and selection rules to valence band angle resolved photoemission of molecular adsorbates on surfaces will be rev iewed. Determining the bonding orientation by angle resolved photoemis sion was initially applied to simple molecular adsorbate systems like CO and N-2. The characterization of the preferential bonding orientati ons of much larger molecular adsorbates has proved to be equally succe ssful. This paper provides demonstrations that these simple rules for photoemission can be applied to increasingly complex adsorbate systems . There exist opportunities to investigate the surface chemistry of la rge molecules using photoemission - at a time when intellectual invest ment in technical improvements to photoemission are bearing fruit.