Electrosyntheses of poly(2,3-benzofuran) films in boron trifluoride diethyl etherate containing poly(ethylene glycol) oligomers

Xu, Jingkun; Nie, Guangming; Zhang, Shusheng; Han, Xuejun; Pu, Shouzhi; Shen, Liang; Xiao, Qiang

doi:10.1016/j.eurpolymj.2005.01.014

Cited by 47 publications

(25 citation statements)

References 28 publications

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“…Under these circumstances, BFEE serves not only as the solvent but also as the supporting electrolyte and no other supporting electrolyte is needed. On the other hand, investigations on the electrochemical polymerization of fused ring compounds, such as thianaphthene [42], naphthalene [43], benzofuran [44] and indole [45], have been carried out in BFEE. However, as far as we know there have been no reports on the electrochemical polymerization of carbazole in BFEE.…”

Section: Introductionmentioning

confidence: 99%

Electrodeposition of High-quality Polycarbazole Films in Composite Electrolytes of Boron Trifluoride Diethyl Etherate and Ethyl Ether

Nie

Zhang

et al. 2006

J Appl Electrochem

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High-quality polycarbazole (PCZ) films were synthesized electrochemically by direct oxidation of carbazole in boron trifluoride diethyl etherate (BFEE) containing vol. 20% ethyl ether (EE). The oxidation potential of carbazole in this medium was measured to be only 0.90 V vs. SCE, which was lower than that determined in acetonitrile containing 0.1 mol l )1 Bu 4 NBF 4 (1.35 V vs. SCE). PCZ films obtained from this medium showed better electrochemical behavior, better thermal stability with conductivity of 7.5 Â 10 )3 S cm )1 being one order of magnitude higher than those reported previously, indicating that BFEE/EE was a better medium than acetonitrile for the electrosyntheses of PCZ films. As-formed PCZ films can be partly dissolved in acetone, acetonitrile and tetrahydrofuran. Spectral analysis provided evidence for the existence of the conjugated structure of the PCZ chain. Fluorescent spectra indicate that electrosynthesized PCZ is an ideal blue light emitter.

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Section: Introductionmentioning

confidence: 99%

Electrodeposition of High-quality Polycarbazole Films in Composite Electrolytes of Boron Trifluoride Diethyl Etherate and Ethyl Ether

Nie

Zhang

et al. 2006

J Appl Electrochem

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“…7 could be interpreted as that the photocurrent density is not simply proportional to the molecular density on the substrates. This insight indicates several possibilities to improve the photocurrent generation properties of thin films at the interfaces, for example, a certain degree of ordered arrangement of film molecules may be necessary for efficient generation of photocurrents, or the electron donating nature of ethylene oxide (EO) group efficiently worked to increase electron density in the π-cloud of helicene moiety [24,25], and so on. Further studies are now under progress using oxa [9]helicene derivatives with the different number of EO units.…”

Section: Resultsmentioning

confidence: 99%

Fabrication and Characterization of Molecular Films of 11-Oxa[9]helicene and 9-Diethyleneglycoxy-11-oxa[9]helicene

Miah

Shahabuddin

Kayes

et al. 2016

Trans. Mat. Res. Soc. Japan

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A highly π-conjugated helical compound, 11-oxa [9]helicene (O9H), and its derivative 9-diethyleneglycoxy-11-oxa[9]helicene (2EO9H) were used to prepare thin films by the Langmuir technique, and their structures and photoelectrochemical properties were evaluated. Brewster angle microscopic (BAM) observation implied that 2EO9H molecules formed a homogeneous, flat monolayer but O9H molecules three-dimensionally aggregated at the air-water interface. The same morphological features were also observed for films deposited on silicon wafers using atomic force microscopy (AFM). The film structures on solid supports were estimated by X-ray reflectivity (XR) measurements. The XR fitting analysis and theoretical calculation suggested that in the 2EO9H monolayer the hydrophobic aromatic planes of helicene moiety oriented perpendicularly to the monolayer plane and the hydrophilic diethyleneglycoxy group (DEG) was bended/twisted. It was also indicated that optical band gaps estimated from UV-visible spectra are not much changed due to introduction of DEG chain to the O9H moiety, but the 2EO9H monolayer showed larger photocurrent densities.

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“…The direct anodic oxidation of 2,3-benzofuran on stainless steel sheet in boron trifluoride di-Et etherate (BFEE) contained 10% poly(ethylene glycol) (PEG) with a molar mass of 400 (by vol.) affords a visible-light transparent high-quality substratesupported poly(2,3-benzofuran) (PBF) film [111]. The oxidation potential of 2,3-benzofuran in this medium was measured to be only 1.0 V vs SCE, which is lower than that determined in acetonitrile þ 0.1 M Bu 4 NBF 4 (1.2 V vs SCE).…”

Section: Uses Of Benzofuran In Materials Sciencementioning

confidence: 99%

Five‐Membered Heterocycles: Benzofuran and Related Systems

2011

Modern Heterocyclic Chemistry

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Electrosyntheses of poly(2,3-benzofuran) films in boron trifluoride diethyl etherate containing poly(ethylene glycol) oligomers

Cited by 47 publications

References 28 publications

Electrodeposition of High-quality Polycarbazole Films in Composite Electrolytes of Boron Trifluoride Diethyl Etherate and Ethyl Ether

Electrodeposition of High-quality Polycarbazole Films in Composite Electrolytes of Boron Trifluoride Diethyl Etherate and Ethyl Ether

Fabrication and Characterization of Molecular Films of 11-Oxa[9]helicene and 9-Diethyleneglycoxy-11-oxa[9]helicene

Five‐Membered Heterocycles: Benzofuran and Related Systems

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