• Kapkowski, Maciej
• Kotowicz, Sonia
• Korzec, Mateusz
• Pająk, Agnieszka Katarzyna

Abstract

<jats:title>Abstract</jats:title><jats:p>This paper presents the photophysical investigations of two organic compounds synthesised directly by the aminolysis depolymerisation of the waste poly(ethylene terephthalate) (rPET) with aromatic amines, i.e., aniline and 3-amino-N-hexyl-1,8-naphthalimide without use of a catalyst. The chemical structure was confirmed by <jats:sup>1</jats:sup>H-NMR and <jats:sup>13</jats:sup>C-NMR, as well as FT-IR. The thermal, electrochemical and optical studies of the obtained derivatives were performed. The presented compounds were thermally stable up to 360 °C, and the glass transition temperature (<jats:italic>T</jats:italic><jats:sub>g</jats:sub>) occurred for the compound with the 1,8-naphthalimide units. The electrochemical investigations of the synthesised compounds have revealed one oxidation process and two reduction processes for the compound with the 1,8-naphthalimide fragments. The tested derivatives were characterised by a low-lying highest occupied molecular orbital (HOMO) level (below –6.09 eV) and an energy-band gap (<jats:italic>E</jats:italic><jats:sub>g</jats:sub>) below 3.10 eV. The obtained molecules were absorbed in the range of 204 nm - 445 nm and emitted light from a purple to a green spectral region deepened on the used solvent with low quantum yields. The blends with poly(3-hexylthiophene-2,5-diyl) (P3HT), which is used as a donor in the bulk heterojunction solar cells (BHJ), and amide derivative with 1,8-naphthalimide fragments were made, and the emission quenching of poly(3-hexylthiophene-2,5-diyl) (P3HT) was recorded. The presented results of the photophysical investigations have opened new possibilities for obtaining functional materials from recycled poly(ethylene terephthalate) (rPET).</jats:p>

Topics

• impedance spectroscopy
• compound
• glass
• glass
• glass transition temperature
• Nuclear Magnetic Resonance spectroscopy
• amine
• quenching