COLL 8 |
| Michael A. Filler, James A. Van Deventer, David W. Porter, and Stacey F. Bent. Department of Chemical Engineering, Stanford University, Stanford, CA 94305 |
| The field of organic functionalization of group-IV semiconductor surfaces is currently evolving from investigations of single functional groups toward a broader attempt to understand the factors that govern the thermodynamics and kinetics of complex multifunctional molecules at the interface. Our recent work with a series of carboxylic acids, aldehydes, and ketones on Ge(100)-2x1 demonstrates how in situ infrared spectroscopy, paired with density functional theory calculations, is a powerful tool to identify surface reaction products as well as to gain insight into complex bonding geometries that include inter- and intra-dimer interactions. Several molecules including acetyl chloride, acetic acid, formic acid, formaldehyde, acetaldehyde, and acetone have been studied. Reactivity trends analogous to those from classic organic chemistry will be highlighted, including nucleophilic attack, dative-bonding, Lewis acid/base chemistry, and enolization. In addition, isotope labelling will be shown to provide compelling spectroscopic evidence of multiple complex interdimer bonding geometries and pathways. |
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Vibrational Analyses of Dry and Wet Surfaces
9:00 AM-11:30 AM, Sunday, March 28, 2004 Marriott -- Grand Ballroom H, Oral
Division of Colloid and Surface Chemistry |