CHED 1038 |
| Photoreaction kinetics of p-nitrobenzoic acid (PNBA) on Ag-coated Au nanoparticle slides were studied using surface-enhanced Raman scattering (SERS). PNBA was adsorbed to the slides by soaking the slides in 0.1 M PNBA. The photoreduction of PNBA to form azodibenzoic acid (ADBA) on the prepared surfaces was observed in real time with SERS spectra (532 nm excitation) under ambient conditions. Spectral features consistent with ADBA were clearly observed, with the most significant growth within the first 10 min of irradiation. The intensity of a characteristic photorproduct band was monitored in order to measure photoreaction progress. An exponential kinetic curve was fit to the data and the rate constant was determined to be 0.13 ± 0.01 s-1. |
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Undergraduate Research Poster Session: Physical Chemistry
2:00 PM-4:00 PM, Monday, April 7, 2008 Morial Convention Center -- Hall A, Poster
Division of Chemical Education |