para-Benzylamine substituted oligophenol was synthesized via enzymatic oxidative polycondensation of 4-(benzylamino)phenol (BAP). Polymerization involved only the phenolic moiety without oxidizing the sec-amine (benzylamine) group. Chemoselective polycondensation of BAP monomer using HRP enzyme yielded oligophenol with sec-amine functionality on the side-chain. Effects of various factors including solvent system, reaction pH and temperature on the polycondensation were studied. Optimum polymerization process with the highest yield (63 %) and molecular weight (Mn = 5000, degree of polymerization ≈ 25) was achieved using the EtOH/ buffer (pH 5.0; 1 : 1 vol. ratio) at 25 °C in 24 h under air. Characterization of the oligomer was accomplished by 1H NMR and 13C NMR, Fourier transform infrared spectroscopy (FT-IR), gel permeation chromatography (GPC), ultraviolet-visible spectroscopy (UV-Vis), cyclic voltammetry (CV) and thermogravimetric analysis (TGA). The polymerization process involved the elimination of hydrogen from BAP, and phenolic-OH end groups of the oligo(BAP), confirmed using 1H NMR and FT-IR analyses. The oligomer backbone possessed phenylene and oxyphenylene repeat units, and the resulting oligomer was highly soluble in common organic solvents such as acetone, CHCl3, 1,4-dioxane, N,N-dimethylformamide (DMF), tetrahydrofurane (THF) and dimethylsulfoxide (DMSO). Oligo(BAP) was thermally stable and exhibited 5 % and 50 % mass loss determined by thermogravimetric analysis at 247°C and 852°C, respectively.
Acknowledgements.
Ersen Gokturk would like to acknowledge the Turkish Ministry of National Education for his Ph.D. scholarship.
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© 2015 Institute of Chemistry, Slovak Academy of Sciences
Articles in the same Issue
- Original Paper
- Preparation and characterisation of gelatine hydrogels predisposed to use as matrices for effective immobilisation of biocatalystst‡
- Original Paper
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- Influence of solvents and novel extraction methods on bioactive compounds and antioxidant capacity of Phyllanthus amarus
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- Innovative approach to treating waste waters by a membrane capacitive deionisation system
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- Liquid—liquid equilibria of ternary systems of 1-hexene/hexane and extraction solvents
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- Design of extractive distillation process with mixed entraineri‡
- Original Paper
- Kinetic study of non-reactive iron removal from iron-gall inks
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- Chemoenzymatic polycondensation of para-benzylamino phenol
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- Copper corrosion behaviour in acidic sulphate media in the presence of 5-methyl-lH-benzotriazole and 5-chloro-lH-benzotriazole
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- Synthesis of new 5-bromo derivatives of indole and spiroindole phytoalexins
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- Convenient amidation of carboxyl group of carboxyphenylboronic acids
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- A novel intramolecular reversible reaction between the hydroxyl group and isobutenylene chain in a cyclophane-type macrocycle
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- Erratum to “Adriana Bakalova, Boryana Nikolova-Mladenova, Rossen Buyukliev, Emiliya Cherneva, Georgi Momekov, Darvin Ivanov: Synthesis, DFT calculations and characterisation of new mixed Pt(II) complexes with 3-thiolanespiro-5′-hydantoin and 4-thio-1H-tetrahydropyranspiro-5′-hydantoin”, Chemical Papers 70 (1) 93–100 (2016)*
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- Erratum to “Martyna Rzelewska, Monika Baczyńska, Magdalena Regel-Rosocka, Maciej Wiśniewski: Trihexyl(tetradecyl)phosphonium bromide as extractant for Rh(III), Ru(III) and Pt(IV) from chloride solutions”, Chemical Papers 70 (4) 454–460 (2016)*
Articles in the same Issue
- Original Paper
- Preparation and characterisation of gelatine hydrogels predisposed to use as matrices for effective immobilisation of biocatalystst‡
- Original Paper
- Photocatalytic reduction of nitro aromatic compounds to amines using a nanosized highly active CdS photocatalyst under sunlight and blue LED irradiation
- Original Paper
- Synthesis of butyrate using a heterogeneous catalyst based on polyvinylpolypyrrolidone
- Original Paper
- Behaviour of selected pesticide residues in blackcurrants (Ribes nigrum) during technological processing monitored by liquid-chromatography tandem mass spectrometry
- Original Paper
- Influence of solvents and novel extraction methods on bioactive compounds and antioxidant capacity of Phyllanthus amarus
- Original Paper
- Investigation of phytochemicals and antioxidant capacity of selected Eucalyptus species using conventional extraction
- Original Paper
- Innovative approach to treating waste waters by a membrane capacitive deionisation system
- Original Paper
- Liquid—liquid equilibria of ternary systems of 1-hexene/hexane and extraction solvents
- Original Paper
- Design of extractive distillation process with mixed entraineri‡
- Original Paper
- Kinetic study of non-reactive iron removal from iron-gall inks
- Original Paper
- Chemoenzymatic polycondensation of para-benzylamino phenol
- Original Paper
- Copper corrosion behaviour in acidic sulphate media in the presence of 5-methyl-lH-benzotriazole and 5-chloro-lH-benzotriazole
- Original Paper
- Synthesis of new 5-bromo derivatives of indole and spiroindole phytoalexins
- Original Paper
- Design, synthesis and anti-mycobacterial evaluation of some new iV-phenylpyrazine-2-carboxamides
- Short Communication
- Convenient amidation of carboxyl group of carboxyphenylboronic acids
- Short Communication
- A novel intramolecular reversible reaction between the hydroxyl group and isobutenylene chain in a cyclophane-type macrocycle
- Erratum
- Erratum to “Adriana Bakalova, Boryana Nikolova-Mladenova, Rossen Buyukliev, Emiliya Cherneva, Georgi Momekov, Darvin Ivanov: Synthesis, DFT calculations and characterisation of new mixed Pt(II) complexes with 3-thiolanespiro-5′-hydantoin and 4-thio-1H-tetrahydropyranspiro-5′-hydantoin”, Chemical Papers 70 (1) 93–100 (2016)*
- Erratum
- Erratum to “Martyna Rzelewska, Monika Baczyńska, Magdalena Regel-Rosocka, Maciej Wiśniewski: Trihexyl(tetradecyl)phosphonium bromide as extractant for Rh(III), Ru(III) and Pt(IV) from chloride solutions”, Chemical Papers 70 (4) 454–460 (2016)*