New cyanopyridine based conjugated polymers carrying auxiliary electron donors: From molecular design to blue emissive PLEDs

Pilicode, Naveenchandra; Naik, Praveen; Nimith, K.M.; Acharya, Madhukara; Satyanarayan, M. N.; Adhikari, Airody Vasudeva

doi:10.1016/j.dyepig.2019.108046

Cited by 11 publications

(14 citation statements)

References 47 publications

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“…The reaction pathways followed for the preparation of respective monomers and new polymeric materials [45][46][47][48] The monomer used for the polymerization, viz. 4,6-bis(3 0 -formyl-[1,1 0 -biphenyl]-4-yl)-2-(heptyloxy) nicotinonitrile (7) was obtained in good yield by reacting 3-formylphenyl boronic acid (6) with the aforementioned intermediate, (4).…”

Section: Synthesismentioning

confidence: 99%

“…However, in LUMOs, the electron cloud density is highly localized on the electron-withdrawing cyanopyridine unit except for VPPy 1 where mostly localized on cyanovinylene linkage, clearly demonstrating the donor-acceptor interactions . [45][46][47][48]…”

Section: Theoretical Simulationsmentioning

confidence: 99%

“…[44] Also, our group reported a series of cyanopyridine based D-A type conjugative polymeric luminogens and successfully employed in the construction of PLEDs. [45][46][47][48] Based on what has been discussed above, the present paper describes the molecular engineering and synthesis of three new photo-responsive polymers containing an electron-deficient 2-(alkyloxy)-4,6-diphenylnicotinonitrile scaffold attached to (un)substituted phenylene rings in their main chain along with vinylene bridges, as potential luminogens for PLED application. In this D-A-D type design, the strong electron-accepting nicotinonitrile scaffold was introduced along with electron-donating biphenylene units on either side of it.…”

Section: Introductionmentioning

confidence: 99%

“…[ 44 ] Also, our group reported a series of cyanopyridine based D‐A type conjugative polymeric luminogens and successfully employed in the construction of PLEDs. [ 45‐48 ]…”

Section: Introductionmentioning

confidence: 99%

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Nicotinonitrile centered luminescent polymeric materials: Structural, optical, electrochemical, and theoretical investigations

Pilicode

Naik

Adhikari

2020

Polymer Engineering & Sci

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Herein, we describe the design, synthesis, and structural characterization of three new push-pull type conjugative polymers, that is, VPPy 1-3 comprising strong electron-withdrawing N-heterocyclic nicotinonitrile scaffold coupled with electron-donating phenylene units through vinylene bridges, as promising candidates for optoelectronic applications. They were successfully synthesized from their respective co-monomers by simple polycondensation synthetic routes, viz. Knoevenagel and Wittig reactions. All the polymers were subjected to photophysical, electrochemical, thermal, and theoretical studies in order to ascertain their suitability in polymer light-emitting diode applications as blue emitters. Evidently, they are readily soluble in most of the organic solvents, enabling them easy solution-processable. These new polymers display strong blue photoluminescence at the peak in the range of 431 to 462 nm with a wide optical bandgap in the order of 2.55 to 2.63 eV. The obtained electrochemical data were employed to evaluate their HOMO/LUMOs. The density functional theory calculations generated useful information on their FMO, molecular geometries, and electronic properties. Also, the influence of their structural modification on the above-said properties was discussed in detail to reveal the structure-property relationship. Conclusively, these results illustrate the great prospective of this class of polymeric materials for the application in solutionprocessable blue LEDs.

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Section: Synthesismentioning

confidence: 99%

Section: Theoretical Simulationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…[ 44 ] Also, our group reported a series of cyanopyridine based D‐A type conjugative polymeric luminogens and successfully employed in the construction of PLEDs. [ 45‐48 ]…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Nicotinonitrile centered luminescent polymeric materials: Structural, optical, electrochemical, and theoretical investigations

Pilicode

Naik

Adhikari

2020

Polymer Engineering & Sci

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“…35,36 Recently, our research group reported such PLEDs with ITO/PEDOT:PSS/polymer/Al architecture, here polymer centered on cyanopyridine scaffold was used as a blue light emitter. [37][38][39][40] Accordingly, all the polymers Py 1-4 were employed in the device fabrication and their pertinent results were discussed.…”

Section: Introductionmentioning

confidence: 99%

New cyanopyridine‐based π‐conjugative poly(azomethine)s: Synthesis, characterization and electroluminescence studies

Pilicode

Naik

Nimith

et al. 2020

Polymers for Advanced Techs

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Four new Schiff-base type conjugative polymers (CPs), that is, Py 1-4 carrying a strong electron-withdrawing cyanopyridine scaffold coupled with different electrondonating aromatic/heteroaromatic moieties were synthesized from their respective co-monomers by simple poly-condensation route. They were subjected to structural, thermal, photophysical, and electrochemical characterizations and theoretical investigations in order to identify their suitability in polymer light-emitting diode (PLED) application. All these polymers showed good film-forming ability and exhibited favorable photophysical behaviors with an optical bandgap in the order of 2.54-2.68 eV. Further, their electrochemical data were used to evaluate highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO) levels. Finally, Py 1-4 were successfully employed as blue-light emitter in the construction of new ITO/PEDOT:PSS/ Py 1-4 /Al configured light-emitting diodes (LED), and the fabricated devices demonstrated stable blue electroluminescence behavior endorsing an effective electrons injection in the PLEDs.

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Bis(azolyl)pyridine‐2,6‐dicarboxamide Derivatives: Synthesis, Bioassay Analysis and Molecular Docking Studies

kumar

Hariprasad

Joshi³

et al. 2023

ChemistrySelect

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A new class of bis(azolyl) pyridine‐2,6‐dicarboxamides based derivatives were designed and synthesized by employing ultrasonication methodology. In this work, we studied the role of different heteroaromatic azole units such as oxazole, thiazole and imidazole moieties along with different donating/withdrawing substituents on the pyridine scaffold and anticipated to display good biological activities. The detailed molecular docking studies validates the antimicrobial activities of these targeted molecules. Further, to evaluate their antioxidant properties, the target compounds were exposed to three different invitro free radical scavenging assay methods. Further, using the disc diffusion method, the targeted molecules were screened for invitro antibacterial activities against the pathogenic stains. Besides, the targeted molecules were also tested against A. niger and P. chrysogenum strains to assess their antifungal activity. The screening results reveals that, the most of the compounds form the series demonstrating reasonable to decent antioxidant and antimicrobial activities against pathogenic stains in comparison with the standard drug.

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New cyanopyridine based conjugated polymers carrying auxiliary electron donors: From molecular design to blue emissive PLEDs

Cited by 11 publications

References 47 publications

Nicotinonitrile centered luminescent polymeric materials: Structural, optical, electrochemical, and theoretical investigations

Nicotinonitrile centered luminescent polymeric materials: Structural, optical, electrochemical, and theoretical investigations

New cyanopyridine‐based π‐conjugative poly(azomethine)s: Synthesis, characterization and electroluminescence studies

Bis(azolyl)pyridine‐2,6‐dicarboxamide Derivatives: Synthesis, Bioassay Analysis and Molecular Docking Studies

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