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Title: Electrostatically self-assembled polyoxometalates on molecular-dye- functionalized diamond
Authors: Zhong, Y.L.
Ng, W.
Yang, J.-X. 
Loh, K.P. 
Issue Date: 30-Dec-2009
Citation: Zhong, Y.L., Ng, W., Yang, J.-X., Loh, K.P. (2009-12-30). Electrostatically self-assembled polyoxometalates on molecular-dye- functionalized diamond. Journal of the American Chemical Society 131 (51) : 18293-18298. ScholarBank@NUS Repository.
Abstract: We have successfully immobilized phosphotungstic acid (PTA), a polyoxometalate, on the surface of boron-doped diamond (BDD) surface through electrostatic self-assembly of PTA on pyridinium dye-functionalized-BDD. The inorganic/organic bilayer structure on BDD is found to exhibit fast surface-confined reversible electron transfer. The molecular dye-grafted BDD can undergo controllable electrical stripping and regeneration of PTA which can be useful for electronics or sensing applications. Furthermore, we have demonstrated the use of PTA as a molecular switch in which the direction of photocurrent from diamond to methyl viologen is reversed by the surface bound PTA. Robust photocurrent converter based on such molecular system-diamond platform can operate in corrosive medium which is not tolerated by indium tin oxide electrodes. © 2009 American Chemical Society.
Source Title: Journal of the American Chemical Society
ISSN: 00027863
DOI: 10.1021/ja908131t
Appears in Collections:Staff Publications

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