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First-order kinetic decay rates can be obtained by measuring the time-dependent reflection spectra of ultraviolet-sensitive objects as they returned from their excited, colored state back to the ground, colorless state. In this paper, a procedure is described which provides an innovative and unique twist on standard, undergraduate, kinetics experiments. Specifically, UV-sensitive beads and threads are utilized as the time changing system, as opposed to more conventional wet chemical systems. The spectral data is collected and analyzed by the students during a standard laboratory session, and the class results are pooled so that the reflection spectra and decay curves of all colors for both UV sensitive beads and threads can be compared. This new approach to a kinetics experiment increases student interest in a safe, inexpensive, and environmentally friendly way.

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Chemically modified electrodes with supported titanium complexes have been generated for the first time by the reaction of T1CI4 with hydroxylated surfaces of glassy carbon or platinum electrodes. The resulting monolayers of titanium oxychloride species are not electroactive, but they can be evaluated with scanning Auger microprobe analysis and with a subsequent derivatization that uses (hydroxymethyl)ferrocene as a redox probe. The modified electrodes are stable under inert atmosphere but readily degrade upon exposure to air. Treatment of electrodes with other Ti complexes such as Ti(OEt)4, Cp2TiCl2, and CpTiCL gives either no reaction or electrochemically unstable surface moieties.