ELECTROSYNTHESIS OF POLY-2,5-PYRIDINE PROMOTED BY NICKEL-COMPLEXES

被引：11

作者：

SCHIAVON, G ^{[1
]}

ZOTTI, G ^{[1
]}

BONTEMPELLI, G ^{[1
]}

LOCOCO, F ^{[1
]}

机构：

[1] UNIV UDINE,INST CHEM,I-33100 UDINE,ITALY

来源：

SYNTHETIC METALS | 1988年 / 25卷 / 04期

关键词：

Catalysts--Nickel - Electrochemistry - Plastics--Electric Conductivity - Sodium Compounds - Solids--Doping;

D O I：

10.1016/0379-6779(88)90576-0

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A nickel-catalysed electrochemical method for the synthesis of poly-2,5-pyridine is suggested. It is based on the reduction of 2,5-dibromopyridine carried out by generating electrochemically and continuously recycling nickel(0) from nickel(II) in the presence of both bipyridyl and triphenyl-phosphine. The simultaneous presence of these ligands is required to avoid the abstraction of the nickel promoter from the electrocatalytic cycle, thus allowing a very satisfactory yield (89 percent) to be achieved. Bipyridyl is in fact a ligand suitable for binding the metal in the 2+ oxidation state, so that it is able to compete with the nitrogen-coordination sites present in the polymer originated in the process, thus maintainng nickel(II) in the solution, while triphenylphosphine is able to stabilize nickel(0), thus preventing side reactions of this very reactive species with the solvent.

引用

页码：365 / 373

页数：9

共 20 条

[11] EASY PREPARATION OF ELECTRODES MODIFIED BY CONJUGATED POLYPYRIDINE FILMS DISPLAYING COORDINATIVE PROPERTIES AND THEIR EFFECTIVENESS AS MEDIATORS OF ELECTROCATALYTIC PROCESSES [J].