An insight into the synthesis of cationic porphyrin-imidazole derivatives and their photodynamic inactivation efficiency against Escherichia coli

Xavier Moreira, Patrícia Santos, M. Amparo F. Faustino, M. Manuela M. Raposo, Susana P. G. Costa, Nuno M.M. Moura*, Ana T. P. C. Gomes, Adelaide Almeida, M. G. P. M. S. Neves

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

28 Citations (Scopus)

Abstract

New porphyrin-imidazole derivatives were synthesised by Radziszewski reaction between 2-formyl-5,10,15,20-tetraphenylporphyrin 1 and several (hetero)aromatic 1,2-diones, which after cationization afforded promising monocationic photosensitizers 3a-d. Singlet oxygen studies have demonstrated that all the cationic porphyrin-imidazole conjugates 3a–d were capable to produce cytotoxic species. These photosensitizers were able to photoinactivate Eschericha coli and their inactivation profile was improved in the presence of KI.
Original languageEnglish
Article number108330
JournalDyes and Pigments
Volume178
DOIs
Publication statusPublished - Jul 2020
Externally publishedYes

Keywords

  • Antimicrobial photodynamic therapy
  • Gram-negative E. coli
  • N-Heterocycles
  • Photosensitizer
  • Porphyrin

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