Photosensitization Ability of a Water Soluble Zinc(II)tetramethyltetrapyridinoporphyrazinium Salt in Aqueous Solution and Biomimetic Reverse Micelles Medium

TOMAS C. TEMPESTI; JUAN C. STOCKERT; EDGARDO N. DURANTINI

The Journal of Physical Chemistry B

American Chemical Society

Lugar: Washington, DC 200361, 155 Sixteenth Street N.W.; Año: 2008 vol. 112 p. 15701 - 15701

p class="articleBody_abstractText" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">The spectroscopic properties and the photodynamic activity of a highly water soluble zinc(II)tetramethyltetrapyridino[2,3-b:2¡Ç,3¡Ç-g:2¡Ç¡Ç,3¡Ç¡Ç-l:2¡Ç¡Ç¡Ç,3¡Ç¡Ç¡Ç-q]porphyrazinium salt (ZnTM2,3PyPz) were investigated in aqueous homogeneous solution and in biomimetic reverse micelles medium bearing photooxidizable biological substrates. Absorption and fluorescence spectroscopic studies indicate that ZnTM2,3PyPz is dissolved as monomer in water and in n-heptane/sodium bis(2-ethylhexyl)sulfosuccinate (AOT, 0.1 M)/water (W0 = 30) micellar system. Fluorescence quantum yields (¥ÕF) of 0.29 and 0.27 were calculated for ZnTM2,3PyPz in water and in AOT micelles, respectively. Spectroscopic analysis at different AOT concentrations showed interaction between ZnTM2,3PyPz and AOT reverse micelles wit