Unravelling the mechanisms of reactive oxygen species formation in nanohybrid systems of porphyrins and enriched (6,5) single-walled carbon nanotubes for photosensitization

Monteiro, Camila S.; Ferreira, Daniele C.; Sáfar, G. A. M.; Gontijo, Rafael N.; Fantini, C.; Martins, Dayse Carvalho da Silva; Idemori, Ynara Marina; Pinheiro, M. V. B.

doi:10.1039/c6cp03366k

Cited by 8 publications

(1 citation statement)

References 60 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Hybrid materials MP/H 2 P-CNT have shown donoracceptor behavior and effective charge separation for photo-induced electron transfer. These nanohybrids have promising applications in solar cells [9], photocatalytic oxidations [10], photo-generation of reactive oxygen species (ROS) [11], microbial photodynamic therapy for biomedical [12], and food applications [13]. MP-CNT hybrids also showed good performance in electrocatalysis for an oxygen reduction reaction (ORR) [14] and CO 2 reduction reaction (CO 2 RR) [15], and in electroanalysis as bio-analyte sensors [16].…”

Section: Introductionmentioning

confidence: 99%

Hybrid Zn-β-Aminoporphyrin–Carbon Nanotubes: Pyrrolidine and Direct Covalent Linkage Recognition, and Multiple-Photo Response

Rebelo,

Laia,

Szefczyk

et al. 2023

Molecules

View full text Add to dashboard Cite

To unveil and shape the molecular connectivity in (metallo)porphyrin–carbon nanotube hybrids are of main relevance for the multiple medicinal, photoelectronic, catalytic, and photocatalytic applications of these materials. Multi-walled carbon nanotubes (MWCNTs) were modified through 1,3-dipolar cycloaddition reactions with azomethine ylides generated in situ and carrying pentafluorophenyl groups, followed by immobilization of the β-amino-tetraphenylporphyrinate Zn(II). The functionalities were confirmed via XPS and FTIR, whereas Raman spectroscopy showed disruptions on the graphitic carbon nanotube surface upon both steps. The functionalization extension, measured via TGA mass loss and corroborated via XPS, was 0.2 mmol·g−1. Photophysical studies attest to the presence of the different porphyrin–carbon nanotube connectivity in the nanohybrid. Significantly different emission spectra and fluorescence anisotropy of 0.15–0.3 were observed upon variation of excitation wavelength. Vis-NIR absorption and flash photolysis experiments showed energy/charge transfer in the photoactivated nanohybrid. Moreover, evidence was found for direct reaction of amino groups with a carbon nanotube surface in the presence of molecular dipoles such as the zwitterionic sarcosine amino acid.

show abstract

Section: Introductionmentioning

confidence: 99%

Hybrid Zn-β-Aminoporphyrin–Carbon Nanotubes: Pyrrolidine and Direct Covalent Linkage Recognition, and Multiple-Photo Response

Rebelo,

Laia,

Szefczyk

et al. 2023

Molecules

View full text Add to dashboard Cite

show abstract

Bismuth oxide/carbon nanodots/indium oxide heterojunctions with enhanced visible light photocatalytic performance

Chen

Tao

et al. 2022

J Mater Sci: Mater Electron

View full text Add to dashboard Cite

Photodynamic Inactivation of Botrytis cinerea Spores by Curcumin—Effect of Treatment Factors and Characterization of Photo-generated Reactive Oxygen Species

Damyeh

Netzel

Mereddy

et al. 2023

Food Bioprocess Technol

View full text Add to dashboard Cite

Botrytiscinerea is the main cause of gray mold in a wide range of fresh produce, which causes huge losses in pre- and/or post-harvest stages and is therefore considered the second major plant pathogen globally. Since the application of synthetic fungicides is not allowed in postharvest conditions, alternative natural approaches are required to reduce the resulting spoilage. The aim of this study was to investigate the efficacy of photodynamic treatment in inactivating B. cinerea spores in vitro, for which the interactive effect of influential treatment parameters on curcumin phototoxicity was studied using an I-optimal design. Results showed that the antifungal activity of the treatment was significantly dependent on solvent, curcumin concentration, and irradiance, except for light dose. A complete photoinactivation of spores was obtained in an aqueous ethanolic environment (optimum condition: 13 μM, 31.75 mW cm−2, 19.05 J cm−2), compared to when curcumin was dissolved in medium-chain-triglyceride (MCT) oil. Furthermore, the photogeneration of superoxide anion and hydroxyl radicals was demonstrated by electron paramagnetic resonance spectroscopy, which indicates the occurrence of a type-I photodynamic reaction. These findings suggest that curcumin-based photosensitization can inhibit/reduce fungal infection, which can be employed in pre/post-harvest stages to reduce the waste caused by spoilage.

show abstract

Unravelling the mechanisms of reactive oxygen species formation in nanohybrid systems of porphyrins and enriched (6,5) single-walled carbon nanotubes for photosensitization

Cited by 8 publications

References 60 publications

Hybrid Zn-β-Aminoporphyrin–Carbon Nanotubes: Pyrrolidine and Direct Covalent Linkage Recognition, and Multiple-Photo Response

Hybrid Zn-β-Aminoporphyrin–Carbon Nanotubes: Pyrrolidine and Direct Covalent Linkage Recognition, and Multiple-Photo Response

Bismuth oxide/carbon nanodots/indium oxide heterojunctions with enhanced visible light photocatalytic performance

Photodynamic Inactivation of Botrytis cinerea Spores by Curcumin—Effect of Treatment Factors and Characterization of Photo-generated Reactive Oxygen Species

Contact Info

Product

Resources

About