Binuclear Mn(III) and Fe(III) porphyrin nanostructured materials in catalytic reduction of 4-nitrophenol

Corrêa, Gabriela A.; Castro, Baltazar de; Rebelo, Susana L.H.

doi:10.1016/j.cattod.2023.114149

Cited by 3 publications

(2 citation statements)

References 37 publications

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“…In material CNT-P, although the absence of sarcosine was deduced from the N1s spectrum, the percentages of C4 and C5 are nearly identical to those of CNT-F5 (~2% and ~0.5%, respectively). This can be explained by imine bonds (C=N) from the porphyrin nucleus that overlap C4 and protonated imine bonds (C=N + -H) that overlap C5 [32]. These results support the presence on the CNT of the ZnP and indicate a small fraction of protonated porphyrin [H 4 TPP] 2− (see fluorescence studies in Section 2.3).…”

Section: Physicochemical Characterization 221 Xps Data and Analysismentioning

confidence: 56%

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

Rebelo,

Laia,

Szefczyk

et al. 2023

Molecules

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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.

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Section: Physicochemical Characterization 221 Xps Data and Analysismentioning

confidence: 56%

“…For material CNT-P, upon ZnβNH 2 TPP immobilization, the N1s spectrum shows components N1 and N3; the latter at 498.3 eV is ascribed to pyrrolic N from the porphyrin core [32]. Non-detection of the N2 component might be explained by leaching of the aa upon the second functionalization step.…”

Section: Physicochemical Characterization 221 Xps Data and Analysismentioning

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

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show abstract

Rationally engineering magadiite heavy metal adsorbent for p-nitrophenol hydrogenation reduction

Yan,

Wu,

Wang

et al. 2023

Applied Clay Science

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Synergistic effect of two metal porphyrins in a polymer catalyst for oxygen electroreduction

Kuzmin,

Chulovskaya,

Filimonova

et al. 2023

Journal of Electroanalytical Chemistry

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Binuclear Mn(III) and Fe(III) porphyrin nanostructured materials in catalytic reduction of 4-nitrophenol

Cited by 3 publications

References 37 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

Rationally engineering magadiite heavy metal adsorbent for p-nitrophenol hydrogenation reduction

Synergistic effect of two metal porphyrins in a polymer catalyst for oxygen electroreduction

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