Synthetic principles for bandgap control in linear pi-conjugated systems
Article Abstract:
Reduction of bandgap in linear pi-conjugated systems (LCSs) leads to the generation of true 'organic metals' that exhibit intrinsic electrical conductivity due to the enhancement of the thermal population of the conduction band. Structures with small bandgaps, however, are known to be unstable. It is thus important to consider the following factors in the design and synthesis of LCSs: the energy related to bond length alternation; the mean deviation from planarity E(super theta); the aromatic resonance energy of the cycle E(super Res), the inductive or mesometric electronic effects of eventual substitution E(super Sub) and the intermolecular or interchain coupling in the solid state E(super int).
Publication Name: Chemical Reviews
Subject: Chemistry
ISSN: 0009-2665
Year: 1997
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Conjugated poly(thiophenes): synthesis, functionalization, and applications
Article Abstract:
Poly(thiophene) (PT) possesses conductive and electroactive properties that enable it to function as an efficient conducting polymer. Its electrical, electronic and electrochemical properties make it useful in a wide range of devices which include photoelectrodes, photovoltaic cells and rechargeable batteries. However, mechanical and environmental instabilities provide disadvantages in its application. Recent advances in composite materials and copolymerization allow the manipulation of the PT monomer structure which results in materials with better mechanical properties.
Publication Name: Chemical Reviews
Subject: Chemistry
ISSN: 0009-2665
Year: 1992
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Functionalization of polymers by metal-mediated processes
Article Abstract:
Metals can mediate the creation of polymer products with the desired density of some particular functional groups, obtained from the catalytic reaction of the template polymer. Base polymers can be transformed to multifunctional systems with controlled molecular weight and functional density of attached groups. Applications include adhesives and drug delivery systems.
Publication Name: Chemical Reviews
Subject: Chemistry
ISSN: 0009-2665
Year: 1995
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