The partial molar volumes of hydrated proton and electron determined with time-resolved photoacoustic

C.D. BORSARELLI

JOURNAL DE PHYSIQUE IV

EDP Sciences

Lugar: Les Ulis Cedex A - France; Año: 2005 vol. 125 p. 11 - 13

1155-4339

Photoinduced charge-transfer reactions in solution produce the formation or destruction of ionic species. Therefore, important structural rearrangements in the solutes and their solvent spheres can be expected, with a net (positive or negative) reaction volume change, DVR, which in turn represents difference between the partial molar volume, Vo, of the products and reactants. The partial molar volume is an important thermodynamic magnitude used in solution chemistry. In this presentation, the DVR information obtained with time-resolved photoacoustics (TRP) for a couple of photoinduced charge-transfer processes was used to estimate the Vo of fundamental ionic species in aqueous solutions, such the solvated proton and electron.