Adsorption of Zn2+ to glucosamine-functionalized and undecanol-functionalized fused silica/water interfaces is studied using second harmonic generation (SHG). We characterize the surface using vibrational sum frequency generation (SFG) and X-ray photoelectron spectroscopy (XPS), and employ the SHG ?(3) technique to track Zn2+ adsorption directly at the fused silica/aqueous interface, at pH 7 and 10 mM NaCl. We determine the thermodynamic binding parameters using standard electrical double layer models to quantify the change in interfacial potential upon zinc adsorption. The results presented here allow for the possibility of 2:1 to 3:1 carbohydrate:metal coordination complexes and suggest the possibility for multivalent interactions which have not been observed with glucose in bulk aqueous phase, where 1:1 complexes dominate. We compare these results to undecanol-functionalized fused silica�our simplified carbohydrate system�and show that interactions between metal ions and carbohydrate arrays may be stronger at interfaces, with direct implications for controlling and predicting coordination chemistry.

Zn<sup>2+</sup> adsorption at glucosamine- and undecanol-functionalized fused silica/water interfaces

243rd National Meeting (2012)

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.

Zn2+ adsorption at glucosamine- and undecanol-functionalized fused silica/water interfaces

Zn²⁺ adsorption at glucosamine- and undecanol-functionalized fused silica/water interfaces