Effect of 2,2-Dialkyl/Diaryl substituents on the opto-electronics of poly (propylene-3,4-ethylenedioxythiophenoimine)-co-poly(3,4- propylenedioxythiophene) dendritic star copolymers

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dc.contributor.authorMdluli, Siyabonga
dc.contributor.authorRamoroka, Morongwa
dc.contributor.authorJohn-Denk, Vivian
dc.contributor.authorIwuoha, Emmanuel
dc.date.accessioned2025-11-03T08:04:51Z
dc.date.available2025-11-03T08:04:51Z
dc.date.issued2025
dc.description.abstractA series of four dendritic star copolymers that consist of G2poly(propyleneamine) dendrimer core, and pendants of poly(propylene-3,4-ethylenedioxythiophene) substituted with 2,2- dibenzyl, 2,2-dicyclohexylmethyl, 2,2-dimethyl, and 2,2-dihexyl that grew out from the core, were synthesized using a combination of Schiff base condensation and chemical oxidative copolymerization techniques. Chemical structures of dendritic star copolymers were examined and confirmed using nuclear magnetic resonance (NMR), Raman, and Fourier transform infrared spectroscopies (FTIR). The effect of the 2,2-dialkyl substituents on the opto- electronics and thermal stability of the dendritic star copolymers was evaluated using ultraviolet-visible spectroscopy (UV–Vis), thermogravimetric analysis (TGA), and photoluminescence (PL). Insertion of long chains of 2,2-dicyclohexyl showed a bathochromic shift and reduction in optical band gap compared to other substituents. TGA revealed less thermal resistance and fast degradation rates at temperatures above 300 °C associated with copolymers decomposition. This work revealed that modification of copolymers with alkyl or aryl substituents alter significantly with their thermal and optical properties by changing the decomposition temperature and optical bandgap.
dc.identifier.citationMdluli, S. B. et al. (2025) Effect of 2,2-Dialkyl/Diaryl substituents on the opto-electronics of poly(propylene-3,4-ethylenedioxythiophenoimine)-co-poly(3,4- propylenedioxythiophene) dendritic star copolymers. Results in Chemistry. [Online] 17.
dc.identifier.urihttps://doi.org/10.1016/j.rechem.2025.102642
dc.identifier.urihttps://hdl.handle.net/10566/21358
dc.language.isoen
dc.publisherElsevier B.V.
dc.subjectpoly (propylene amine) dendrimer
dc.subjectopto-electronics
dc.subjectstar copolymer
dc.subjectphotoluminescence
dc.subjectinfrared spectroscopies
dc.titleEffect of 2,2-Dialkyl/Diaryl substituents on the opto-electronics of poly (propylene-3,4-ethylenedioxythiophenoimine)-co-poly(3,4- propylenedioxythiophene) dendritic star copolymers
dc.typeArticle

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