DigitalCommons@Linfield

Reduction Kinetics in Heteropoly Blue Species of Organically Modified Polyoxotungstates

Jereld R. Nicholson Library

Polyoxometalates (POMs) are soluble metal-oxide clusters of increasing interest due to their unique physical properties. These properties make them attractive building blocks for molecular assemblies and materials science applications. A heteropoly blue species appears in POMs when held at certain reduction potentials during Electrolysis. Investigation in the spectroscopic states of POM’s has not been well investigated. Dawson-Wells Polyoxotungstates, 1 {[C₄H₉]₄N}₆{[C₈H₃₇Si]₂OP₂W₁₇O₆₁}, 2 {[C₄H₉]₄N}₆{[C₁₂H₃₇Si]₂OP₂W₁₇O₆₁}, 3 {[C₄H₉]₄N}₆{[C₁₈H₃₇Si]₂OP₂W₁₇O₆₁}, and 4 {[C₄H₉]₄N}₆{[C₁₈H₃₇Si]₂OP₂W₁₇O₆₁} were synthesized. Ultra Violet Spectroscopy was used to determine rate of reduction in the heteropoly blue species. Reduction rates were highest in 3 and 4, which also had a higher maximum absorbance at 860 nm. These results indicate longer tailed POMs produce a higher maximum reduction absorbance and have a larger rate of reduction.