Synthesis and electrochemical study of narrow band gap conducting polymers based on 2,2 '-dipyrroles linked with conjugated aza-spacers

• A series of 2,2'-dipyrrole monomers separated by aza-spacers (N,N'-bis-(1H-pyrrol-2-ylmethylene)-benzene-1,4-diamine; N-4,N-4'-bis(1H-pyrrol-2-ylmethylene)-biphenyl-4,4'-diamine; N,N'-bis-[1-(1H-pyrrol-2-yl)-ethylidene]-hydrazine; and 4,4'-bis[(1H-pyrrol-2-yl)-diazenyl] biphenyl) have been synthesised using modified Schiff and azo-coupling reactions. The new 2,2'-dipyrroles linked with conjugated aza-spacers have been evaluated as precursors of narrow band gap conducting polymers. Electrochemically synthesized poly(N,N'-bis-[1-(1H-pyrrol-2-yl)ethylidene]-hydrazine) displays a narrow band gap of just 0.7 eV, making it a suitable candidate for optoelectronic applications.

Ämnesord

NATURVETENSKAP  -- Kemi -- Organisk kemi (hsv//swe)

NATURAL SCIENCES  -- Chemical Sciences -- Organic Chemistry (hsv//eng)

Nyckelord

poly (dipyrroles)

aza-spacers

synthesis

cyclic voltammetry

electroluminescent polymers

magnetic-properties

metallic polymers

electron-acceptor

4th generation

pyrrole

monomers

units

polypyrrole

copolymers

Organic chemistry

Organisk kemi

Publikations- och innehållstyp

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art (ämneskategori)