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Monomerization and photodynamic activity of Zn(II) tetraalkyltetrapyridinoporphyrazinium derivatives in AOT reverse micelles by Carlos A. Suchetti; Edgardo N. Durantini is a Materials Science article available to read on EtoBox.

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Monomerization and photodynamic activity of cationic Zn(II) tetraalkyltetrapyridinoporphyrazinium derivatives bearing N-alkyl chains of different length (ZnPc 1 R: eCH 3 , ZnPc 2 R: e(CH 2 ) 11 CH 3 , ZnPc 3, R: e(CH 2 ) 15 CH 3 ) were evaluated in n-heptane/sodium bis(2-ethylhexyl)sulfosuccinate (AOT)/water micellar system. Absorption and fluorescence spectroscopic studies of these sensitizers were analyzed in n-heptane/ AOT (0.1 M)/water system by varying the amount of water dispersed in the reverse micelles (W 0 1⁄4 [H 2 O]/[AOT]). Under these conditions, the absorbance of the monomeric Q-band (w686 nm) of ZnPcs 1e3 increases rapidly until W 0 w 30 and then the increase becomes steady. These results were also confirmed by fluorescence studies. Analysis of the Q-band at different AOT concentrations, keeping W 0 1⁄4 30 as constant, was carried out to determine the binding constant (K b ) between these sensitizers and AOT reverse micelles. The values of K of 210, 150 and 34 were found for ZnPcs 1, 2 and 3, respectively. Photodynamic activity of these sensitizers was evaluated in AOT system using 9,10-dimethylanthracene (DMA). The photooxidation rate of DMA sensitized by these phtha

Who reads Monomerization and photodynamic activity of Zn(II) tetraalkyltetrapyridinoporphyrazinium derivatives in AOT reverse micelles?

Author

Carlos A. Suchetti; Edgardo N. Durantini

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0143-7208)

Published

2007

Language

EN

Field

Materials Science (Physical Sciences)