Near-Infrared Electrochromism in Electroactive Pentacenediquinone-Containing Poly(aryl ether)s

Abstract

The synthesis and near-infrared electrochromic properties of pentacenediquinone-containing monomers and polymers are reported. The electroactive pentacenediquinone units were incorporated into poly(aryl ether)s in varying degrees by copolymerization. The polymers possessed good thermal stabilities and high glass transition temperatures, and could undergo two reversible steps of electrochemical reduction. Near-infrared electrochromic properties of pentacenediquinone-containing poly(aryl ether)s were studied by spectroelectrochemical analysis, which showed that the radical anions possess intense near-infrared absorption with λ max values between 1331 and 1430 nm, while the dianions also exhibit absorption between 880 and 965 nm. The reduced polymer film displayed intense and broad near-infrared absorption, which was surprisingly stable in air over a long period. The neutral and reduced polymers had electrical conductivity of 1 × 10 -6 and 3 × 10 -3 S/cm, respectively.

Characterization of Three Paralogous Members of the Mammalian Vaccinia Related Kinase Family

“…Among the ϳ200 viral proteins encoded by the genome are two protein kinases, vvB1 1 and vvF10, each of which plays an essential role in the viral life cycle (15-19). The B1 kinase regulates the replication of the viral genome (18), and F10 is required for the onset and progression of virion morphogenesis (16,17). Analysis of the structure and function of these proteins has been facilitated by the ease with which vaccinia virus can be analyzed by both biochemical and genetic means.…”

“…Pathogens that interface with eukaryotic cells also utilize protein kinases to coordinate intrinsic facets of their life cycle and/or to manipulate the host cell. In viruses, for example, modulation of protein phosphorylation may down-regulate the host's response to infection (4 -7), divert the host translation machinery to preferentially translate viral RNAs (8 -12), regulate the replication of the viral genome (13,14), or facilitate viral assembly (15)(16)(17).…”

Orthopoxvirus Targets for the Development of Antiviral Therapies

“…The product of this essential gene exhibits both autophosphorylation and transphosphorylation activity primarily on serine residues [142], but also appears to be involved in the phosphorylation of tyrosine residues on the A17 protein, which is one of the natural substrates for this kinase [143]. Mutant viruses with ts lesions in F10 appear to arrest at a very early stage in virion morphogenesis [144,145].…”

Synthesis and properties of new aromatic polyimides containing redox‐active anthraquinone moieties

“…AQ‐based polymers have been recently reported as potential high‐performance cathode materials for rechargeable lithium batteries . Furthermore, some AQ derivatives and polymers have been reported to be candidates as redox‐active and near‐infrared (NIR) electrochromic materials because they exhibit intense NIR absorptions when the AQ units are electrochemically reduced to a radical anionic state or a dianionic state …”