ChemInform Abstract: The Nature of the Bonding Between Metalloporphyrins (Fe(II), Co(II), Mn(II)) and Oxygen Species (×O‐O×, H<sub>2</sub>+O×/HO×, HOO×,×O×)

Sawyer, Donald T.

doi:10.1002/chin.200225271

Cited by 2 publications

(2 citation statements)

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“…Third, O 2 binding caused a red shift of just 2.2 nm (Δλ3; Δ E = 1.3 kJ/mol), which is anomalous considering the geometric and electronic effects described above. It is well-known that the formation of an M-O 2 complex benefits from the presence of effective charge feedback from M to O 2 as well as weak σ-coordination from O 2 to M . Therefore, this small red shift is the result of a charge balance between π-feedback and σ-coordination, and the π-feedback plays a strong pull role.…”

Section: Resultsmentioning

confidence: 99%

Horizontal and Vertical Push Effects in Saddled Zinc Porphyrin Complexes: Implications for Heme Distortion

et al. 2019

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A heme oxygen binding behavior was described through a unique geometric and electronic comparison of zinc porphyrin complexes. In this work, a charge transfer model for saddled metalloporphyrin complexes outlined the push effects of the ring nonplanarity and axial imidazole, and the pull effect of the axial dioxygen. The origin and role of the horizontal (ring nonplanarity) push effect and its relationship to the vertical (axial ligand) push/pull effect and its contribution to dioxygen binding were considered from the perspectives of crystal structures, theoretical calculations, and bathochromic shifts. Single-point energy and molecular orbital calculations starting from crystal structures were used to obtain the electronic structures of zinc porphyrin complexes. This study not only revealed that the electronic behavior of metalloporphyrins is driven by ring nonplanarity and axial ligation but also afforded new insight into the oxygen carrier mechanism in heme.

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Section: Resultsmentioning

confidence: 99%

Horizontal and Vertical Push Effects in Saddled Zinc Porphyrin Complexes: Implications for Heme Distortion

et al. 2019

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“…After ion‐ligand breaking the complex PcM(X) = O formed which is the active species, and the chemical bond of the complex breaks to form a radical. The order of the energy of the complex chemical bond breaking to form a radical is FePc< CoPc, giving an order of catalytic activity FePc > CoPc 37 . In the coordination field, molecular O 2 is difficult to coordinate with Cu(II) by the Jahn–Tellar effect, so the catalytic activity of CuPc is lower 38 …”

Section: Resultsmentioning

confidence: 99%

Catalytic oxidation of toluene by metal phthalocyanine loaded on cordierite honeycomb

Wang

Liu

Zhang

et al. 2022

J of Chemical Tech & Biotech

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BACKGROUND As one of the common VOCs, toluene is not only hazardous to human health, leading to respiratory disease, cancers, but also harmful to the environment, causing destruction of the ozone layer, photochemical smog and global warming. Catalytic oxidation is one of the most advanced technologies for eliminating VOCs and can convert VOCs to benign components such as carbon dioxide (CO2) and water. As catalysts are important in the catalytic process, finding highly active, low cost catalysts is critical. Metal phthalocyanine(MPc) has potential practical value and wide application prospects as catalysts for its uniquely high catalytic activity and selectivity. Thus, four monolithic catalysts were prepared by impregnating MPc onto cordierite honeycomb. RESULTS Characterization by scanning electron microscopy, X‐ray diffraction, Fourier transform infrared and energy‐dispersive X‐ray spectroscopy showed that the metal phthalocyanines were successfully loaded on the cordierite honeycomb. A fixed‐bed reactor was used to examine the catalytic oxidation effects of metal phthalocyanine species, catalyst amount, feed concentration, feed flow and temperature on toluene. The result showed that the catalytic activity of phthalocyanine iron (FePc) to toluene was better than other three MPcs. The optimal reaction conditions were 120 mg catalyst, 6.3 × 10−3 mol m−3feed concentration and 250 mL min−1 feed flow. The conversion of toluene increased with increasing temperature. CONCLUSION FePc/C also had a good catalytic oxidation effect on different aromatic hydrocarbon compounds (benzene and 1,4‐dimethyl‐benzene). The oxidation products of the catalytic system were CO2 and H2O, which met the requirements of green chemistry. FePc/C is a promising catalytic material because it has high catalytic activity and can be operated in simple conditions, such as low temperatures. © 2022 Society of Chemical Industry (SCI).

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ChemInform Abstract: The Nature of the Bonding Between Metalloporphyrins (Fe(II), Co(II), Mn(II)) and Oxygen Species (×O‐O×, H₂+O×/HO×, HOO×,×O×)

Cited by 2 publications

References 1 publication

Horizontal and Vertical Push Effects in Saddled Zinc Porphyrin Complexes: Implications for Heme Distortion

Horizontal and Vertical Push Effects in Saddled Zinc Porphyrin Complexes: Implications for Heme Distortion

Catalytic oxidation of toluene by metal phthalocyanine loaded on cordierite honeycomb

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ChemInform Abstract: The Nature of the Bonding Between Metalloporphyrins (Fe(II), Co(II), Mn(II)) and Oxygen Species (×O‐O×, H2+O×/HO×, HOO×,×O×)

Cited by 2 publications

References 1 publication

Horizontal and Vertical Push Effects in Saddled Zinc Porphyrin Complexes: Implications for Heme Distortion

Horizontal and Vertical Push Effects in Saddled Zinc Porphyrin Complexes: Implications for Heme Distortion

Catalytic oxidation of toluene by metal phthalocyanine loaded on cordierite honeycomb

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ChemInform Abstract: The Nature of the Bonding Between Metalloporphyrins (Fe(II), Co(II), Mn(II)) and Oxygen Species (×O‐O×, H₂+O×/HO×, HOO×,×O×)