Unlike aromatic polycarbonates, aliphatic polycarbonates (APCs) have been little explored commercially. However, their low toxicity and biodegradability make them excellent candidates for biomedical applications. Recently, they have also been investigated as thermoplastics, binders for photovoltaics, polymer electrolytes and adhesives. Part of this renewed attention stems from the possibility t...

The synthesis of aromatic poly(ether imide)s containing spirobifluorene units in the polymer backbone is described. 2,29-Bis(3,4-dicarboxyphenoxy)-9,99-spirobifluorene dianhydride, which was used as a new monomer, was synthesized with 2,29-dihydroxy-9,99-spirobifluorene as the starting material. In the spiro-segment, the rings of the connected bifluorene were orthogonally arranged. This bis(eth...

Porous aromatic frameworks (PAFs) incorporating a high concentration of acid functional groups possess characteristics that are promising for use in separating lanthanide and actinide metal ions, as required in the treatment of radioactive waste. These materials have been shown to be indefinitely stable to concentrated acids and bases, potentially allowing for multiple adsorption/stripping cycl...

The different triplet sequences in high molecular weight aromatic copolyimides comprising pyromellitimide units ("I") flanked by either ether-ketone ("K") or ether-sulfone residues ("S") show different binding strengths for pyrene-based tweezer-molecules. Such molecules bind primarily to the diimide unit through complementary π-π-stacking and hydrogen bonding. However, as shown by the magnitude...

Front Cover: Article 2200737 by Dennis W. Smith, Jr. and co-workers highlights the versatile scalable electrophilic synthesis of a forgotten semi-fluorinated polyaryl ether from diphenyl hexafluoroacetone hydrate catalyzed triflic acid. Despite presence 6F linkages, anomalous crystallinity is observed for very first time this polymer. This interfacial aromatic polymerization applicable to other...

Chemically prepared hevein domains (HDs), N-terminal domain of an antifungal protein from Nicotiana tabacum (CBP20-N) and an antimicrobial peptide from Amaranthus caudatus (Ac-AMP2), were examined for their affinity for chitin, a beta-1,4-linked polymer of N-acetylglucosamine. An intact binding domain, CBP20-N, showed a higher affinity than a C-terminal truncated domain, Ac-AMP2. The formation ...

Two series of novel aromatic polyamides containing pendent dimethyltriphenylamine moieties were prepared based on N,N-bis(4-aminophenyl)-N′,N′-di(4-methylphenyl)-1,4-phenylenediamine (4) and N,Nbis(4-carboxyphenyl)-N′,N′-di(4-methylphenyl)-1,4-phenylenediamine (4′). These compounds with similar structures were successfully synthesized by amination reactions of 4-amino-4′,4′′-dimethyltriphenylam...

A novel PMR polyimides (TMBZ-15) based on substituted benzidines is examined and compared to state-of-the-art PMR-15. The mechanism for the thermal decomposition of two specific PMR polyimides is obtained using TG/FTIR/MS techniques. In order to verify the pathway of polyimide degradation, a pyrolysis/GC-MS technique was employed to evaluate the organic degradation products, particularly the la...

BACKGROUND Natural aromatic polymers, mainly melanins, have potential and current applications in the cosmetic, pharmaceutical and chemical industries. The biotechnological production of this class of compounds is based on tyrosinase-dependent conversion of L-tyrosine and other aromatic substrates into melanins. The purpose of this work was to apply metabolic engineering for generating Escheric...

Aromatic bis-aldehydes have been used as building blocks in the synthesis of polyazomethines (a class of conjugated Schiff bases) and their physicochemical properties have been studied. Six dialdehydes have been synthesized, 3a-3f, via etherification reaction between aromatic diols (2a-2f) and 4-fluorobenzaldehyde (1) (see Scheme 1), and then polymerized with 1,4-phenylenediamine (4a) and 4,4'-...