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Abstract <p>The microstructure of a series of diphenyl oxide–diphenyl sulfide (co)poly(arylene diphthalides) was studied by <sup>13</sup>C NMR spectroscopy. The compositional heterogeneity of these polymers is determined not only by the ratio of aromatic fragments but also by the different stereochemistry of the diphthalide groups along the polymer chain. It was shown that analysis of the split signals of the bridgehead quaternary <i>sp</i><sup>3</sup>-hybridized carbon atoms of the phthalide rings allows the content of homo- (AA and BB) and heterodiads (AB) of <i>racemic</i> and <i>meso</i> configurations in the (co)polymers to be estimated with satisfactory accuracy. The effect of synthesis conditions on the microstructure of (co)poly(arylene diphthalides) was investigated.</p>

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Microstructure Study of (Co)poly(arylene diphthalides) by 13C NMR Spectroscopy

  • 期刊论文

  • 发表日期：

    2026年5月2日

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  • Tagir A. Yangirov,
  • Natalia G. Gileva,
  • Akhnef A. Fatykhov,
  • Vladimir A. Kraikin

摘要

Abstract

The microstructure of a series of diphenyl oxide–diphenyl sulfide (co)poly(arylene diphthalides) was studied by 13C NMR spectroscopy. The compositional heterogeneity of these polymers is determined not only by the ratio of aromatic fragments but also by the different stereochemistry of the diphthalide groups along the polymer chain. It was shown that analysis of the split signals of the bridgehead quaternary sp3-hybridized carbon atoms of the phthalide rings allows the content of homo- (AA and BB) and heterodiads (AB) of racemic and meso configurations in the (co)polymers to be estimated with satisfactory accuracy. The effect of synthesis conditions on the microstructure of (co)poly(arylene diphthalides) was investigated.