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Cristian Tirapegui
Cristian Tirapegui

Public Documents 1
Photophysical an electrochemical insight of azo-functionalized phthalocyanines
Cristian Tirapegui
Italo Orellana

Cristian Tirapegui

and 2 more

August 02, 2024
This study focuses on the synthesis and characterization of azophthalocyanines (MAzoPc) by incorporating azobenzene moieties onto metallophthalocyanines. The investigation explores the electrochemical, spectral, photophysical behaviors, and aggregation phenomena of these com-pounds in dimethyl sulfoxide and dimethylformamide. The synthesized Pcs include nitrophthalo-cyanines (MNO2Pc), aminophthalocyanines (MNH2Pc), and azophthalocyanines (MAzoPc) for zinc (Zn), copper (Cu), and cobalt (Co). The absorption spectra reveal distinct characteristics, such as the B-band and Q band, providing insights into their electronic properties. Irradiation experiments with Uv light indicate photochemical dissociation of the azobenzene fraction, po-tentially leading to the regeneration of precursor species. However, visible light irradiation shows no reversible photoisomerization. Aggregation studies confirm the absence of aggregation effects within the working concentration range. Electrochemical characterization using cyclic voltam-metry and square wave voltammetry provides insights into the redox behavior of these com-pounds. The findings contribute to a comprehensive understanding of the electronic properties of azophthalocyanines, emphasizing their potential applications in various fields such as optoe-lectronics and photodynamic therapy.

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