Syntheses of novel fluorinated dibenzo[a,c]phenazine comprising polymers for electrochromic device applications
| Autor: | Serife O. Hacioglu, Ece Aktas, Gonul Hizalan, Naime Akbasoglu, Ali Cirpan, Levent Toppare |
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| Přispěvatelé: | Mühendislik ve Doğa Bilimleri Fakültesi -- Mühendislik Temel Bilimleri Bölümü, Hacıoğlu, Şerife Özdemir |
| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: |
Redoxpotential
Synthesised Quinoxaline Polymers Performance Redox potentials Conjugated polymers Silafluorene Catalysis Ethylene Copolymer Electrochemical behaviors Unit Materials Chemistry Acceptor groups Redox reactions Spectroelectrochemistry Band-gap Conductivity Electrochromism Benzodithiophene Device application Polymer chains General Chemistry Low oxidation potential Energy gap Red shift Spectroelectrochemical behavior Chemistry Polymer Solar Cells Electrochromic behavior Electrochromic devices Chemistry - Photocatalysts - Electrochromism Organic Photovoltaics Electron-rich |
| Popis: | In this study, two novel fluorinated dibenzo[a,c]phenazine derivatives, 2,7-bis(5-bromo-4-hexylthiophen-2-yl)-11-fluorodibenzo[a,c]phenazine (TFBPz) and 2,7-bis(2,3-dihydrothieno[3,4-b][1,4]dioxin-5-yl)-11-fluorodibenzo[a,c]phenazine (EFBPz), were synthesized by coupling fluorodibenzo[a,c]phenazine (FBPz) with electron rich 3-hexylthiophene and ethylene dioxythiophene (EDOT) units. The monomers were polymerized electrochemically and their electrochemical, spectroelectrochemical and electrochromic behaviors were studied. Then, PTFBPz and PEDOT comprising electrochromic device was constructed and reported. Comparing both polymers in terms of their redox potentials, as expected, PEFBPz showed a lower oxidation potential due to the insertion of an electron rich EDOT unit into the polymer chain, which increased the electron density significantly. EDOT comprising dibenzo[a,c]phenazine derivative PEFBPz exhibited a red shifted neutral state absorption with lower optical band gap values compared to those of PTFBPz. Furthermore, three novel D-A type dibenzo[a,c]phenazine comprising polymers (PBDT-TFBPz, PBDT-FBPz and PSi-TFBPz) were synthesized chemically and all polymers were investigated in terms of their electrochromic and physicochemical behaviors. |
| Databáze: | OpenAIRE |
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