Chemoenzymatic polycondensation of para-benzylamino phenol

Yildirim, Pınar; Göktürk, Ersen; Turaç, Ersen; Demir, Hacı Ökkeş; Şahmetlioğlu, Ertuğrul

doi:10.1515/chempap-2015-0242

Cited by 6 publications

(6 citation statements)

References 55 publications

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“…At the end of the reaction, the precipitated polymer was centrifuged. The obtained product was washed with water and methanol and dried at 60 C. 36,37 Color of the products were black. The obtained polymers were soluble in dimethylformamide and dimethylsulfoxide, and insoluble in chloroform, tetrahydrofuran, acetone, and dichloromethane.…”

Section: Representative Polymerization Proceduresmentioning

confidence: 99%

Horseradish peroxidase‐based hybrid nanoflowers with enhanced catalytical activities for polymerization reactions of phenol derivatives

Göktürk

Öçsoy

Turaç

et al. 2020

Polymers for Advanced Techs

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Catalytic activity and stability of HRP‐Cu2+ hybrid nanoflowers (hCu‐NFs) in the polymerization reactions of phenol derivatives was investigated. It was observed that the catalytic activity and stability of hybrid nanoflowers on the polymerization of the phenol derivatives was considerably higher compared to free Horseradish peroxidase (HRP) enzyme. The hCu‐NFs effectively polymerized phenolic compounds as a novel nanobiocatalyst and led to polymers having quite high yields, molecular weights, and thermal stabilities compared to free HRP enzyme. The hCu‐NFs provide substantial repeated use and showed some degree of catalytic activity even after fourth cycle experiment in the polymerization reactions.

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Section: Representative Polymerization Proceduresmentioning

confidence: 99%

Horseradish peroxidase‐based hybrid nanoflowers with enhanced catalytical activities for polymerization reactions of phenol derivatives

Göktürk

Öçsoy

Turaç

et al. 2020

Polymers for Advanced Techs

Self Cite

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“…At the end of the reaction, the precipitated polymer was centrifuged. The obtained product was washed with water and methanol and dried at 60 °C [29,30]. The colors of the obtained products were black.…”

Section: Representative Polymerization Proceduresmentioning

confidence: 99%

Flowerlike hybrid horseradish peroxidase nanobiocatalyst for the polymerization of guaiacol

Göktürk¹

2020

Turk J Chem

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In this study, the catalytic activity and stability of flowerlike hybrid horseradish peroxidase (HRP) nanobiocatalyst (HRPCu2+) obtained from Cu2+ ions and HRP enzyme in the polymerization reaction of guaiacol were analyzed. We demonstrated that HRP-Cu2+ and hydrogen peroxide (H2O2) initiator showed significantly increased catalytic activity and stability on the polymerization of guaiacol compared to that of free HRP enzyme. Poly(guaiacol) was observed with quite high yields (88%) and molecular weights (38,000 g/mol) under pH 7.4 phosphate-buffered saline (PBS) conditions at 60 °C with 5 weight% of HRP-Cu2+ loading. HRP-Cu2+ also shows very high thermal stability and works even at 70 °C reaction temperature; free HRP enzyme denatures at that temperature. Furthermore, HRP-Cu2+ provided considerable repeated use and showed some degree of catalytic activity, even after the fourth recycle, in the polymerization of guaiacol.

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“…9,10 Many polymeric materials can be successfully synthesized through enzyme catalyzed radicalic polymerizations. 11 Flower-shaped hybrid organic-inorganic nanobiocatalysts were first discovered by Ge et al 12 Organic-inorganic hybrid nanoflowers were mainly prepared using different proteins as organic components and Cu(II) ions as inorganic component. Formation of complexes between Cu(II) ions and protein molecules generates micrometersized flower-shaped particles.…”

Section: Introductionmentioning

confidence: 99%

Production of flower‐shaped nanobiocatalysts from green tea and investigation of their peroxidase mimicking activity on the polymerization of phenol derivatives

Kalayci,

Kaplan,

Dadi

et al. 2023

Polymers for Advanced Techs

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Enzyme catalyzed reactions are known to be environmental friendly and easy method for many applications. However, utilization of enzymes in a variety of reactions is strictly limited due to their high cost, instability in aqueous solutions, denaturation in organic solvents and high temperatures. For this reason, it is important to discover new generation catalyst systems indicating enzyme‐like catalytic activity. Here, we report hybrid organic–inorganic flower‐shaped green tea‐Cu2+ nanobiocatalyst synthesized from green tea extract as an organic component and copper (II) ions (Cu2+) as inorganic component. The effect of the peroxidase‐mimicking activity of green tea‐Cu2+ nanobiocatalyst was investigated on the polymerization of phenol and derivatives (guaiacol and salicylic acid) through Fenton‐like reaction mechanism. Obtained successful outcomes showed that the synthesized nanobiocatalyst showed very high catalytic activity upon polymerization of phenol and guaiacol. The slight solubility of salicylic acid in water limited to achieve its polymerization under‐performed reaction conditions. The yields and molecular weights of the obtained polymers were found to be quite high. While free peroxidase enzymes like horseradish peroxidase (HRP) enzyme loses its catalytic activity at 60°C and above temperatures, green tea‐Cu2+ nanobiocatalyst exhibited very high catalytic activity upon polymerization reactions even at 60°C reaction temperature. This outcome provides significant advantages in some reactions requiring high temperatures. In order to understand the origin of the catalytic activity of the green tea‐Cu2+ nanoflowers, similar biocatalysts were also synthesized from caffeine and catechin alkaloids which are the active components of green tea. Caffeine‐Cu2+ and catechine‐Cu2+ nanobiocatalysts also exhibited quite high catalytic activity toward polymerization of phenol and derivatives. We suggest that green tea‐Cu2+ and similar types of nanobiocatalysts may expand their utilization in polymer chemistry as promising catalytic agents for radicalic polymerizations.

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Chemoenzymatic polycondensation of para-benzylamino phenol

Cited by 6 publications

References 55 publications

Horseradish peroxidase‐based hybrid nanoflowers with enhanced catalytical activities for polymerization reactions of phenol derivatives

Horseradish peroxidase‐based hybrid nanoflowers with enhanced catalytical activities for polymerization reactions of phenol derivatives

Flowerlike hybrid horseradish peroxidase nanobiocatalyst for the polymerization of guaiacol

Production of flower‐shaped nanobiocatalysts from green tea and investigation of their peroxidase mimicking activity on the polymerization of phenol derivatives

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