Synthesis of phosphate and silane-based conjugated polymers derived from bis-azomethine: Photophysical and thermal characterization
Yükleniyor...
Tarih
2021
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Elsevier
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
Polyazomethines including phosphate and silane groups were studied in this work. In the first step, two Schiff
base monomers, SBs with two hydroxyl functional groups were synthesized as a result of a condensation reaction
between diamine and aldehyde. Then, Schiff bases were polymerized by HCl elimination between hydroxyl
groups of the SBs and chlorine of phenyl dichlorophosphate (P) or dichlorodiethylsilane (Si) to obtain two
different polyazomethines for each. FT-IR, 1H NMR, 13C NMR and thermal analysis were utilized to characterize
the synthesized SBs, P-polyazomethines and Si-polyazomethines. The optical band gap values (Eg) of the syn-
thesized P-polyazomethines and Si-polyazomethines were calculated using UV–Vis spectrophotometer. The study
of solvent effects on the absorption of P-polyazomethines and Si-polyazomethines was also included into this
work. Low band gaps of the synthesized polyazomethines could be evaluated as semi-conductive material for the
production of electronic and optoelectronic materials. Photoluminescence (PL) measurements revealed that
P–P1 gave a greenish-yellow color emission upon excitation at blue light of 480 nm with a 16.2% of quantum
yield although the response of Si–P1 had white light emitting property. Besides, P–P2 had multicolor emission
property and Si–P2 had white light emitting property. No obvious fluorescence changes were observed within
3600 s under the same conditions, serving as evidence of stability of PL emission of P–P1, Si–P1, P–P2 and
Si–P2 to be steady along with wavelength of the exciting light. Thermal properties of the synthesized poly-
azomethines indicated that they were thermal stable materials up to 300 ◦C. The residual of P-polyazomethines
and Si-polyazomethines was observed between 39.8% and 64.7% at 1000 ◦C.
Açıklama
Anahtar Kelimeler
P-polyazomethines, Si-polyazomethines, Fluorescence, Thermal stability, Quantum yield
Kaynak
Reactive and Functional Polymers
WoS Q Değeri
Q1
Scopus Q Değeri
Cilt
166
Sayı
Künye
Çulhaoğlu, S., Kolcu, F., & İsmet, Kaya (2021). Synthesis of phosphate and silane-based conjugated polymers derived from bis-azomethine: Photophysical and thermal characterization. Reactive and Functional Polymers, 166 doi:10.1016/j.reactfunctpolym.2021.104978
