Grafting of perylene and naphthalene fluorophores onto chitosan for improved thermal, optical and electrical properties
Yükleniyor...
Tarih
2024
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Polymer Society of Korea
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
The grafting of N-(4-hydroxyphenyl)-3,4,9,10-perylenetetracarboxylic-3,4-anhydride-9,10-imide (4) and N-(4-hydroxyphenyl)-1,4,5,8-naphthalenetetracarboxylic-1,8-anhydride-4,5-imide (8) onto low-molecular-weight chitosan (5) was performed. The fluorescence, stability, electroactivity, conductivity, and solubility properties of the grafted chitosan polymer 9 were highly enhanced compared to the original chitosan. The weight-average molecular weight (Mw) of 19,800 g/mol was obtained. Grafted chitosan has even more excellent thermal stability with a higher initial decomposition temperature of 285 degrees C and char yield at 900 degrees C up to 73%. The fluorescence quantum yield efficiencies for polymer 9 are very high in all studied solvents (70% in CH3CN). The polymer showed five stepwise, fast, reversible one-electron reductions in electrochemical investigations due to the conductive fluorophores 4 and 8. The HOMO/LUMO levels were calculated as - 5.56 and - 4.14 eV, corresponding to the low band gap of 1.42 eV. The spectroelectrochemistry investigations confirmed the nature of the electron transfers. The morphological characterization using AFM, SEM, and TEM methods indicated a highly crystalline character of the grafted chitosan. The modified chitosan has the potential to be applied in various organic photonics and as a significant substrate material.
Açıklama
Anahtar Kelimeler
Conducting polymer, Fluorescence, Grafted chitosan, Spectroelectrochemistry, Thermal stability
Kaynak
Macromolecular Research
WoS Q Değeri
Q3
Scopus Q Değeri
Cilt
Sayı
Künye
Temurlu, S., Abureesh, M. A. A., Abourajab, A., Karşılı, P., Dinleyici, M., Altınışık, S., … Icil, H. (2024). Grafting of perylene and naphthalene fluorophores onto chitosan for improved thermal, optical and electrical properties. Macromolecular Research, 1–17. https://doi.org/10.1007/s13233-023-00233-7
