The Influence of the Methylene Blue Dye on the Rate and the Mechanism of the Oxidative Polymerization of Aniline

被引：0

作者：

Mezhuev, Yaroslav ^{[1
,2
]}

Motyakin, Mikhail ^{[3
,4
]}

Vorobev, Igor ^{[1
,2
]}

Ionova, Irina ^{[4
]}

Baranov, Oleg ^{[1
]}

Dvorikova, Raisa ^{[1
]}

Tsatsakis, Aristidis ^{[5
]}

Soldatova, Anastasia ^{[1
,2
]}

Svistunova, Alina ^{[2
]}

机构：

[1] Russian Acad Sci, Lab Heterochain Polymers, AN Nesmeyanov Instituite Organoelement Cpds, Vavilova St 28, Moscow 119334, Russia

[2] Mendeleev Univ Chem Technol Russia, Dept Biomat, Miusskaya Sq 9, Moscow 125047, Russia

[3] Russian Acad Sci, Emanuel Inst Biochem Phys, Kosygina St 4, Moscow 119334, Russia

[4] Russian Acad Sci, Semenov Fed Res Ctr Chem Phys, Kosygina St 4, Moscow 119991, Russia

[5] Univ Crete, Ctr Toxicol Sci & Res, Med Sch, Div Morphol, Voutes Campus, Iraklion 71003, Crete, Greece

来源：

MACROMOLECULAR CHEMISTRY AND PHYSICS | 2024年 / 225卷 / 16期

关键词：

aniline polymerization; autoacceleration; methylene blue; oxidative polymerization; polyaniline; DISPERSION POLYMERIZATION; CHEMICAL POLYMERIZATION; POLYANILINE; KINETICS; COPOLYMERIZATION; ACID; ADSORPTION; MEDIATOR; H-1-NMR; CELL;

D O I：

10.1002/macp.202400082

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

It is shown that one-electron oxidation of aniline with methylene blue is possible only at low temperatures under UV radiation. The kinetics of aniline polymerization under the action of ammonium persulfate in the presence of catalytic amounts of methylene blue is studied. Kinetic curves are obtained by electron paramagnetic resonance (EPR) spectroscopy at various temperatures and concentrations of methylene blue. The catalytic action of the unassociated form of methylene blue and the deactivation of reactive complexes by the dye dimers are shown to compete. In the context of the obtained results the autocatalysis mechanism of oxidative polymerization is considered, which suggests the formation of complexes of aniline and polyaniline that are subject to subsequent rapid oxidation by the persulfate anion. The unassociated form of methylene blue (MB), which simulates the Q of the emeraldine salt catalyzes the polymerization of M through the formation of charge transfer complexes. The dimeric form of MB deactivates QM. Polyaniline is not a direct oxidizer for M and the autocatalysis mechanism includes the formation and subsequent oxidation of QM with the release of active centers M+.. image

引用

页数：10

共 55 条

[1] Adsorption of Cationic Dye (Methylene Blue) from Water Using Polyaniline Nanotubes Base [J].