Modification of poly(N-vinyl-carbazole) thin films by bromine doping

Touihri, S.; Bérnède, J.C.; Molinié, Philippe; Legoff, D.

doi:10.1016/s0032-3861(02)00118-0

Cited by 11 publications

(12 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The polymer is an electron donor and the dopant should be an electron acceptor. 1 It should be noted that formation of stable metal particles inside the polymer system is also of interest for potential applications such as 3D storage of optical data, shielding of electromagnetic radiation, flexible elements for resistive heating, 2 laser systems, polymer optical fiber amplifier, optical lenses, and integrated waveguides. 3 Electron spin resonance (ESR) has been successfully applied to get information about transition metal ions in the polymer system.…”

Section: Introductionmentioning

confidence: 99%

Electron spin resonance and optical studies of poly(methylmethacrylate) doped with CuCl₂

Abdelaziz

2008

J of Applied Polymer Sci

View full text Add to dashboard Cite

Poly(methyl methacrylate) doped with CuCl 2 was prepared and its electron spin resonance (ESR) spectra and optical properties were studied. The ESR spectra can be accounted for by the presence of two radicals: R a and R b . FTIR spectroscopy reveals that there is no main difference of the spectra due to the addition of CuCl 2 . The structural modifications are identified by investigating the doping level dependence of the peak heights of certain IR absorption peaks. The optical absorption, transmittance, and reflectance measurements were performed for prepared samples. The doping level (W) dependence on the g-factor (g), asymmetry factor (A), peak-to-peak separation (DH pp ), spin concentration (N), optical energy gap (E opt ), Urbach energy (E u ), refractive index (n), average oscillator wavelength (k o ), and average oscillator strength (S o ) were estimated. It was found that these parameters are changed with doping level. These changes suggest high sensitivity of these films to doping that would suggest the applicability in magnetic and/or optical devices.

show abstract

Section: Introductionmentioning

confidence: 99%

Electron spin resonance and optical studies of poly(methylmethacrylate) doped with CuCl₂

Abdelaziz

2008

J of Applied Polymer Sci

View full text Add to dashboard Cite

show abstract

“…The peak at 70.0 eV originated from covalently bonded bromine. Meanwhile, the peaks located at 68.4 and 65.8 eV were assigned to

{Br}_{3}^{-}

and Br – , respectively . The covalently bonded bromine came from the reaction between bromine and composites, which had a destructive effect on the conjugated system and the conductivity.…”

Section: Resultsmentioning

confidence: 99%

Highly improved conductivity of polyaniline–carbon nanotubes Composites doped by liquid bromine with a synergistic effect

2017

Polymer Composites

View full text Add to dashboard Cite

In order to obtain highly conductive carbon nanotubes (CNTs)–polymer composite materials, we prepared polyaniline wrapped carbon nanotubes composites (CNTs‐PANI) by in situ polymerization, and used three different treated methods to fabricate bromine‐doped compounds. Only with the method of liquid bromine processing could we highly improve the conductivity of composites. When treating by liquid bromine, the conductivity of 10%CNTs‐PANI significantly improved nearly 3 × 106 times, which was already near that of pure CNTs we used. Compared with pure PANI doped by bromine, we found that there was a synergistic effect in CNTs‐PANI composites between bromine and CNTs. Based on Fourier transform infrared spectroscopy, X‐ray photoelectron spectroscopy, and heat treatment experiment, we proposed that the interaction between bromine and CNTs‐PANI had both the doped effect as a promoter and the destructive effect on the electrical conductivity. POLYM. COMPOS., 39:E1034–E1040, 2018. © 2017 Society of Plastics Engineers

show abstract

“…The chemical shifts at ca 6.00–8.00 ppm are attributed to the aromatic ring protons. The 1 H NMR spectra of the homopolymer poly(9‐vinylcarbazole) (PVK) and of the copolymer P(ADN‐ co ‐VK 1:6) show a distinct signal at 4.86 ppm corresponding to proton 1 of the aromatic ring of the carbazole unit (Figs and ) …”

Section: Resultsmentioning

confidence: 99%

Blue fluorescent conductive poly(9,10‐di(1‐naphthalenyl)‐2‐vinylanthracene) homopolymer and its highly soluble copolymers with styrene or 9‐vinylcarbazole

Wang

Leung

et al. 2013

Polymer International

View full text Add to dashboard Cite

A new blue fluorescent monomer, 9,10‐di(1‐naphthalenyl)‐2‐vinylanthracene, was designed and synthesized in good yield. Its homopolymer poly(9,10‐di(1‐naphthalenyl)‐2‐vinylanthracene) (P(ADN)) and soluble conductive vinyl copolymers poly[(9,10‐di(1‐naphthalenyl)‐2‐vinylanthracene)‐co‐styrene] (P(ADN‐co‐S)) and poly[(9,10‐di(1‐naphthalenyl)‐2‐vinylanthracene)‐co‐(9‐vinylcarbazole)] (P(ADN‐co‐VK)) were synthesized using free radical solution polymerization. All the polymers showed high glass transition mid‐point temperatures (203 to 237 °C) and good thermal stabilities. The photoluminescence emission of the copolymers was similar to that of P(ADN) (with two maxima at 423 and 442 nm). The lifetimes of P(ADN‐co‐S) (6.82 to 7.91 ns) were all slightly less than that of P(ADN) (8.40 ns). The lifetime of P(ADN‐co‐VK) increased from 7.8 to 8.8 ns with an increase in VK content. The fluorescence quantum yields of P(ADN‐co‐S) showed an overall increasing tendency from 0.42 to 0.58. The quantum efficiencies of P(ADN‐co‐VK) decreased from 0.36 to 0.19 with an increase of VK fraction. With increasing S/VK content, the highest occupied molecular orbital of P(ADN‐co‐S)/P(ADN‐co‐VK) ranged from −5.58 to −5.73 eV, which was similar to that of P(ADN) (−5.71 eV). The band gaps of P(ADN‐co‐S) and P(ADN‐co‐VK) were about 2.97 eV, which were equal to that of P(ADN), and smaller than that of 2‐methyl‐9,10‐di(1‐naphthalenyl)anthracene (MADN) (3.04 eV) and poly(9‐vinylcarbazole) (3.54 eV). Preliminary electroluminescence results were obtained for a homojunction device with the configuration ITO/MoO3 (20 nm)/P(ADN)/LiF (1 nm)/Al (100 nm), which achieved only 30–50 cd m−2, due to P(ADN) having a low mobility of 4.7 × 10−8 cm2 V−1 s−1 compared to that of its model compound MADN of 6.5 × 10−4 cm2 V−1 s−1. © 2013 Society of Chemical Industry

show abstract

Modification of poly(N-vinyl-carbazole) thin films by bromine doping

Cited by 11 publications

References 18 publications

Electron spin resonance and optical studies of poly(methylmethacrylate) doped with CuCl₂

Electron spin resonance and optical studies of poly(methylmethacrylate) doped with CuCl₂

Highly improved conductivity of polyaniline–carbon nanotubes Composites doped by liquid bromine with a synergistic effect

Blue fluorescent conductive poly(9,10‐di(1‐naphthalenyl)‐2‐vinylanthracene) homopolymer and its highly soluble copolymers with styrene or 9‐vinylcarbazole

Contact Info

Product

Resources

About

Modification of poly(N-vinyl-carbazole) thin films by bromine doping

Cited by 11 publications

References 18 publications

Electron spin resonance and optical studies of poly(methylmethacrylate) doped with CuCl2

Electron spin resonance and optical studies of poly(methylmethacrylate) doped with CuCl2

Highly improved conductivity of polyaniline–carbon nanotubes Composites doped by liquid bromine with a synergistic effect

Blue fluorescent conductive poly(9,10‐di(1‐naphthalenyl)‐2‐vinylanthracene) homopolymer and its highly soluble copolymers with styrene or 9‐vinylcarbazole

Contact Info

Product

Resources

About

Electron spin resonance and optical studies of poly(methylmethacrylate) doped with CuCl₂

Electron spin resonance and optical studies of poly(methylmethacrylate) doped with CuCl₂