Steady/transient state spectral researches on the solvent-triggered and photo-induced novel properties of metal-coordinated phthalocyanines

Cao, Hongyu; Gong, Meina; Wang, Mengyan; Tang, Qian; Wang, Lihao; Zheng, Xiaohui

doi:10.1039/d1ra08345g

Cited by 7 publications

(2 citation statements)

References 23 publications

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“…In chloroform, the bound CoPC complex was highly fluorescent. The maximum emission peak appeared at 706 nm (Figure c), very close to that of CoPC, as reported previously. ,− The dissolving was much faster under stirring, and the solubility of CoPC could reach 0.3 mg/mL after 48 h.…”

Section: Resultssupporting

confidence: 86%

“…The solubilization of CoPC was evidenced by the bright green solution (Figure b), while it was nearly colorless in the absence of 3-propanol pyridine. The dissolving of CoPC was monitored by UV–vis spectroscopy. − A strong absorption peak at around 665 nm was assigned to the Q-band (π → π*) excitation arising from CoPC. The peak intensity increased with time as the concentration of bound CoPC increased.…”

Section: Resultsmentioning

confidence: 99%

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Single-Atom Cobalt Catalysts Coupled with Peroxidase Biocatalysis for C–H Bond Oxidation

Liaqat,

Kankanamage,

Duan

et al. 2023

ACS Appl. Mater. Interfaces

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This paper reports a robust strategy to catalyze in situ C–H oxidation by combining cobalt (Co) single-atom catalysts (SACs) and horseradish peroxidase (HRP). Co SACs were synthesized using the complex of Co phthalocyanine with 3-propanol pyridine at the two axial positions as the Co source to tune the coordination environment of Co by the stepwise removal of axial pyridine moieties under thermal annealing. These structural features of Co sites, as confirmed by infrared and X-ray absorption spectroscopy, were strongly correlated to their reactivity. All Co catalysts synthesized below 300 °C were inactive due to the full coordination of Co sites in octahedral geometry. Increasing the calcination temperature led to an improvement in catalytic activity for reducing O2, although molecular Co species with square planar coordination obtained below 600 °C were less selective to reduce O2 to H2O2 through the two-electron pathway. Co SACs obtained at 800 °C showed superior activity in producing H2O2 with a selectivity of 82–85% in a broad potential range. In situ production of H2O2 was further coupled with HRP to drive the selective C–H bond oxidation in 2-naphthol. Our strategy provides new insights into the design of highly effective, stable SACs for selective C–H bond activation when coupled with natural enzymes.

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Section: Resultssupporting

confidence: 86%

Section: Resultsmentioning

confidence: 99%

Single-Atom Cobalt Catalysts Coupled with Peroxidase Biocatalysis for C–H Bond Oxidation

Liaqat,

Kankanamage,

Duan

et al. 2023

ACS Appl. Mater. Interfaces

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An Enhanced Extend Interface via the π–π Interaction to Achieve the Soluble Light‐Assisted Lithium–Oxygen Batteries

Wang,

Song,

Wang

et al. 2024

Adv Funct Materials

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The light‐assisted strategy is considered as an effective way to reduce the overpotential of lithium‐oxygen (Li─O2) batteries, however, the generated solid discharge products are prone to cover active sites of the solid‐state photocatalyst, causing the premature death of the cell. Herein, for the first time, the feasibility of soluble photocatalysts in Li─O2 battery system using Iron (II) Phthalocyanine (FePc) is verified. A micro reaction channel is constructed between the sp2‐carbon cathode and the soluble photocatalyst‐phthalein iron through π–π interaction, which can effectively increase the three‐phase reaction interface, facilitating the rapid separation and the transportation of photogenerated electrons and holes, thus improving the photocatalytic efficiency and the reaction kinetics of Li─O2 battery. Moreover, the FePc soluble photocatalysts induced the dual growth modes of surface growth and solution‐mediated growth pathways for the discharge products lead to an additional discharge capacity in the Li─O2 battery. Accordingly, the battery exhibits a lower overpotential of 0.33 V between discharge and charge plateaus at a current density of 0.01 mA cm−2, displaying the excellent cyclic stability (remaining a round‐trip efficiency of 81.1% after 130 cycles). The novel strategy provides new approaches for the construction of the light‐assisted Li─O2 batteries with reduced overpotential and boosted energy efficiency.

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Biomaterial-based metal-phthalocyanine/metal oxide microspheres for photocatalytic degradation of organic pollutants under visible light

Jiang

Luo

Gong

et al. 2023

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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Steady/transient state spectral researches on the solvent-triggered and photo-induced novel properties of metal-coordinated phthalocyanines

Abstract: The large conjugated system and the d orbitals of metallic phthalocyanines (MPcs) are easily triggered by solvent molecules and light to cause variations in photo-physical and photo-chemical properties.

Cited by 7 publications

References 23 publications

Single-Atom Cobalt Catalysts Coupled with Peroxidase Biocatalysis for C–H Bond Oxidation

Single-Atom Cobalt Catalysts Coupled with Peroxidase Biocatalysis for C–H Bond Oxidation

An Enhanced Extend Interface via the π–π Interaction to Achieve the Soluble Light‐Assisted Lithium–Oxygen Batteries

Biomaterial-based metal-phthalocyanine/metal oxide microspheres for photocatalytic degradation of organic pollutants under visible light

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