Volume 71, Issue 1 pp. 53-59
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Photophysical Properties of Neutral and Cationic Tetrapyridinoporphyrazines

Cristina Martí

Cristina Martí

Institut Químic de Sarrià, Universitat Ramon Llull, Barcelona, Spain

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Santi Nonell

Corresponding Author

Santi Nonell

Institut Químic de Sarrià, Universitat Ramon Llull, Barcelona, Spain

*To whom correspondence should be addressed at: Institut Químic de Sarrià, Universitat Ramon Llull, Via Augusta, 390, E-08017 Barcelona (Spain); [email protected]Search for more papers by this author
Mónica Nicolau

Mónica Nicolau

Dpto. Química Orgánica C-I. Universidad Autónoma de Madrid, Cantoblanco, Madrid, Spain

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Tomás Torres

Corresponding Author

Tomás Torres

Dpto. Química Orgánica C-I. Universidad Autónoma de Madrid, Cantoblanco, Madrid, Spain

*To whom correspondence should be addressed at: Institut Químic de Sarrià, Universitat Ramon Llull, Via Augusta, 390, E-08017 Barcelona (Spain); [email protected]Search for more papers by this author

ABSTRACT

We describe the synthesis and photophysical properties of a series of neutral and cationic 3,4-tetrapyridinoporphyrazines, potential lead photosensitizers for photodynamic inactivation of bacteria. Tetracationic TPyPzs exist essentially as monomers in aqueous systems, but the presence of trialkylated compounds due to incomplete quaternization of the outer nitrogen atoms induces severe aggregation. The absorption, fluorescence, triplet, and singlet oxygen quantum yields for both the neutral and cationic compounds are comparable to those of the related phthalocyanines.

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