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Synlett 2011(4): 435-448  
DOI: 10.1055/s-0030-1259541
ACCOUNT
© Georg Thieme Verlag Stuttgart ˙ New York

Synthesis and Application of Redox-Active Hybrid Catalytic Systems Consisting of Polyanilines and Transition Metals

Toru Amaya, Toshikazu Hirao*
Department of Applied Chemistry, Graduate School of Engineering, Osaka University, Yamada-oka, Suita, Osaka 565-0871, Japan
Fax: +81(6)68797415; e-Mail: hirao@chem.eng.osaka-u.ac.jp;
Further Information

Publication History

Received 1 September 2010
Publication Date:
11 February 2011 (online)

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Abstract

Polyanilines, well-known conductive polymers, serve as a redox mediator for catalysis in organic redox reactions. This account describes the synthesis and application of hybrid catalysts consisting of polyanilines and transition metals or metal nanoparticles.

1 Introduction

2 Hybrid Systems Consisting of Polyanilines and Transition Metals

2.1 Dehydrogenative Oxidation with Polyaniline/Cu(II) or Fe(III) Complex

2.2 Complexation of Polyaniline with Cu(II) and Redox Behavior

2.3 Complexation of Polyaniline with Pd(II) and V(III)

2.4 Palladium-Catalyzed Oxidation Based on Redox of Poly­aniline

2.5 Catalytic Aerobic Oxidation of V(IV) by Poly(2-methoxyaniline-5-sulfonic acid)

2.6 Cu(II)-Induced Conformational Change of Poly(2-methoxyaniline-5-sulfonic acid)

3 Hybrid Systems Consisting of Polyanilines and Transition Metals Nanoparticles

3.1 Metal Nanoparticles Synthesis

3.1.1 Direct Reduction Approach

3.1.2 Template Approach

3.1.3 Ligand Exchange Approach

3.1.4 Polyaniline/Pd Nanoparticles

3.2 Polyaniline/Iron Oxide Nanoparticles

3.3 Poly(2-methoxyaniline-5-sulfonic acid)/Au Nanoparticles

4 Summary and Outlook

Key words

catalysis - oxidation - oxygen - polymers - transition metals