Chemical modification of poly(N‐vinylcarbazole). II. Some properties of poly(N‐vinylcarbazole‐3,6‐diphthalimide)

Biswas, Mukul; Das, Sajal Kumar

doi:10.1002/pol.1982.130200608

Cited by 10 publications

(1 citation statement)

References 11 publications

(5 reference statements)

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“…P 9 and poly[11-(4‘-heptoxy-4-biphenylcarbonylxoy)-1-phenyl-1-undecyne]} (P 13 ), give t 1/2 values of 5.12 and 5.67 s, respectively . It has been known that introduction of a phthalimido group into poly(9-vinylcarbazole) can dramatically improve its PC performance due to the formation of charge-transfer complexes . The much lower t 1/2 value of P 3 , in comparison to those of P 9 and P 13 , indicates that the introduction of the phthalimido chromophore also helps to enhance the photoconduction in the disubstituted PA system.…”

Section: Resultsmentioning

confidence: 99%

Functional Perovskite Hybrid of Polyacetylene Ammonium and Lead Bromide: Synthesis, Light Emission, and Fluorescence Imagining

Sun

Qin

et al. 2006

J. Phys. Chem. B

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A highly photoresponsive perovskite hybrid containing an electroactive organic component (H1) was fabricated. A disubstituted polyacetylene (PA) with a hidden amino functionality (P3) was synthesized, hydrolysis and quaternization of which afforded the desired PA ammonium salt (P5). Mixing P5 with lead bromide readily yielded H1, which was stable, soluble, and film-forming. The inorganic framework induced the polymer chains to align in an ordered fashion, which helped to populate the chain segments with long conjugation lengths. The hybrid emitted a blue light (457 nm) in a high quantum yield (62%), thanks to the enhanced electronic conjugation, the weakened interaction between the layer-segregated chains, and the efficient energy transfer from the inorganic sheets to the organic layers. P3 exhibited a half-discharge time as short as approximately 0.7 s, representing the first example of an efficient photoconductive disubstituted PA. While stable to normal light illumination, H1 was rapidly bleached upon exposure to high-power UV irradiation, enabling facile generation of two-dimensional luminescent photopatterns. After the UV irradiation, the emissions of P9 and P9/H12 were enhanced and weakened, respectively, proving that the inorganic perovskite framework works as a photocatalyst for accelerating the bleaching process of the conjugated PA chains.

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Section: Resultsmentioning

confidence: 99%

Functional Perovskite Hybrid of Polyacetylene Ammonium and Lead Bromide: Synthesis, Light Emission, and Fluorescence Imagining

Sun

Qin

et al. 2006

J. Phys. Chem. B

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Synthesis and some properties of anthracene and anthraquinone incorporated poly(vinyl chloride) and the ion exchange resin therefrom

Biswas

Majumdar

1989

J of Applied Polymer Sci

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SUMMARY:The chlorine displacement reaction between PVC and N-methylcarbazole-3,6-diamine affords a condensate which is insoluble in all possible solvents of PVC. The overall thermal stability of this condensate is appreciably higher than that of PVC. The dielectric behavior is also significantly different from that of unmodified PVC. Sulfonation of the PVC-carbazole condensate affords a cation-exchange resin with -SO,H and -COOH functional moieties. ZUSAMMENFASSUNG:Durch Substitution von Chlor in PVC durch 3,6-Diamino-N-methyl-carbazol entsteht ein Kondensat, das in allen Losungsmitteln fur PVC unloslich ist. Dieses Kondensat ist thermisch stabiler als PVC. Auch die dielektrischen Eigenschaften unterscheiden sich deutlich von denen von PVC. Die Sulfonierung des PVC-CarbazolKondensats liefert ein Kationenaustauscherharz mit SO, H-und COOH-Gruppen.

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Synthesis and electrical and optoelectronic properties of poly[(N‐benzyldiphenylamino)methane]

Akhter

Pramanik

Biswas

1987

J Polym Sci B Polym Phys

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Poly[(N‐benzyldiphenylamino)methane] was synthesized by the condensation polymerization of benzyldiphenylamine and formalin (30% HCOH in water) and examined for electrical and optoelectronic properties. Dark conductivity and photoconductivity of the polymer film were investigated by steady‐state measurements. Current‐voltage characteristics and intrinsic photoconduction of the polymer in the visible wavelength range were studied. A superlinear current increase is tentatively explained in the light of the Poole‐Frenkel effect. Dielectric constant and dielectric loss parameters of the polymer are independent of frequency (50 Hz–10 kHz) and temperature (273–323 K), respectively. The growth and decay rates of the photocurrent depend on the applied voltage, and the photocurrent varies directly with the light intensity. The activation energies for dark conductivity and photoconductivity are 1.16 eV and 1.05 eV, respectively, and the optical energy band gap as evaluated from absorption coefficient spectra is 2.86 eV.

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Chemical modification of poly(N‐vinylcarbazole). II. Some properties of poly(N‐vinylcarbazole‐3,6‐diphthalimide)

Cited by 10 publications

References 11 publications

Functional Perovskite Hybrid of Polyacetylene Ammonium and Lead Bromide: Synthesis, Light Emission, and Fluorescence Imagining

Functional Perovskite Hybrid of Polyacetylene Ammonium and Lead Bromide: Synthesis, Light Emission, and Fluorescence Imagining

Synthesis and some properties of anthracene and anthraquinone incorporated poly(vinyl chloride) and the ion exchange resin therefrom

Synthesis and electrical and optoelectronic properties of poly[(N‐benzyldiphenylamino)methane]

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