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Spectrochim Acta A Mol Biomol Spectrosc. 2009 Apr;72(3):496-501. doi: 10.1016/j.saa.2008.10.021. Epub 2008 Oct 28.

Photoinduced electron transfer from phycoerythrin to colloidal metal semiconductor nanoparticles.

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  • 1School of Chemistry, Bharathidasan University, Tiruchirappalli 620 024, Tamil Nadu, India.


Phycoerythrin is a water soluble pigment which absorbs in the visible region at 563 nm. The interaction of phycoerythrin with colloidal metal semiconductors was studied by absorption, FT-IR and fluorescence spectroscopy. Phycoerythrin adsorbed strongly on the surface of TiO(2) nanoparticles, the apparent association constant for the association between colloidal metal-TiO(2) nanoparticles and phycoerythrin was determined from fluorescence quenching data. The free energy change (DeltaG(et)) for electron transfer process has been calculated by applying Rehm-Weller equation.

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