title: Unravelling the mechanisms of reactive oxygen species formation in nanohybrid systems of porphyrins and enriched (6,5) single-walled carbon nanotubes for photosensitization.
abstract: Nanohybrids of enriched (6,5) single-walled semiconducting carbon nanotubes (E-SWCNTs) and porphyrin can be used synergistically as photodynamic therapy (PDT) agents. The efficiency of different porphyrins within the nanohybrids was investigated and compared with results obtained from porphyrins in previous studies. Reactive oxygen species singlet oxygen (1)O2 and for the first time hydroxyl radical ˙OH generation by the nanohybrids under illumination were detected by electron paramagnetic resonance using spin trapping molecules TEMP and PBN. Based on the analysis, we improve the modelling of charge transport within the nanohybrids, which is also detected by Raman scattering. It is shown that the 5,10,15,20-tetrakis(4-trimethylammoniumphenyl)porphyrin [H2TTMAPP(OTs)4] and E-SWCNT form very efficient nanohybrids for PDT applications in the visible spectral range.
authors.affiliation: Departamento de Química, Instituto de Ciências Exatas, Universidade Federal de Minas Gerais, Belo Horizonte-MG, 31270-901, Brazil.
authors.forename: Camila S
authors.initials: CS
authors.lastname: Monteiro
authors.affiliation: Departamento de Física, Instituto de Ciências Exatas, Universidade Federal de Minas Gerais, Belo Horizonte-MG, 31270-901, Brazil. klauskrambrock@yahoo.com.br.
authors.forename: Daniele C
authors.initials: DC
authors.lastname: Ferreira
authors.affiliation: Departamento de Física, Instituto de Ciências Exatas, Universidade Federal de Minas Gerais, Belo Horizonte-MG, 31270-901, Brazil. klauskrambrock@yahoo.com.br.
authors.forename: Gustavo A M
authors.initials: GA
authors.lastname: Sáfar
authors.affiliation: Departamento de Física, Instituto de Ciências Exatas, Universidade Federal de Minas Gerais, Belo Horizonte-MG, 31270-901, Brazil. klauskrambrock@yahoo.com.br.
authors.forename: Rafael N
authors.initials: RN
authors.lastname: Gontijo
authors.affiliation: Departamento de Física, Instituto de Ciências Exatas, Universidade Federal de Minas Gerais, Belo Horizonte-MG, 31270-901, Brazil. klauskrambrock@yahoo.com.br.
authors.forename: Cristiano
authors.initials: C
authors.lastname: Fantini
authors.affiliation: Departamento de Química, Instituto de Ciências Exatas, Universidade Federal de Minas Gerais, Belo Horizonte-MG, 31270-901, Brazil.
authors.forename: Dayse C S
authors.initials: DC
authors.lastname: Martins
authors.affiliation: Departamento de Química, Instituto de Ciências Exatas, Universidade Federal de Minas Gerais, Belo Horizonte-MG, 31270-901, Brazil.
authors.forename: Ynara M
authors.initials: YM
authors.lastname: Idemori
authors.affiliation: Departamento de Física, Instituto de Ciências Exatas, Universidade Federal de Minas Gerais, Belo Horizonte-MG, 31270-901, Brazil. klauskrambrock@yahoo.com.br.
authors.forename: Maurício V B
authors.initials: MV
authors.lastname: Pinheiro
authors.affiliation: Departamento de Física, Instituto de Ciências Exatas, Universidade Federal de Minas Gerais, Belo Horizonte-MG, 31270-901, Brazil. klauskrambrock@yahoo.com.br.
authors.forename: Klaus
authors.initials: K
authors.lastname: Krambrock