A twist in the non-slanted H-mers to control π-conjugation in 2-dimensions and optical properties

Das, Mrinal K.; Hameed, Fatima; Lillis, Ryan; Gavvalapalli, Nagarjuna

doi:10.1039/d0ma00424c

Cited by 7 publications

(6 citation statements)

References 52 publications

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“…24 kDa) and two-dimensional π-conjugated oligomers, without the need for pendant solubilizing chains. [37][38][39][40] Furthermore, we successfully synthesized conjugated porous polymer networks using adamantyl strapped building blocks and irreversible P-C bond forming reactions. 41 The incorporation of adamantyl straps not only reduced interchain π-π interactions but also enhanced the residence time of the network in the reaction mixture, resulting in a swollen network that allowed monomers to diffuse and react, enabling control over the network size and crosslinking density.…”

Section: Introductionmentioning

confidence: 99%

π-Face strapped monomers enable self-stabilized hyperbranched π-conjugated polymer particles

Mohanan,

Zhang,

Gavvalapalli

2024

Polym. Chem.

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Section: Introductionmentioning

confidence: 99%

π-Face strapped monomers enable self-stabilized hyperbranched π-conjugated polymer particles

Mohanan,

Zhang,

Gavvalapalli

2024

Polym. Chem.

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“…Research efforts are ongoing to explore the effects of the side chains on the optoelectrical properties of conjugated polymers. − These studies have garnered increasing interest in various fields due to the potential to enhance the mechanical properties and processability of the polymers. The size of the side chains influences the temperature for thermal transition, solubility, mechanical property, and packing/ordering of conjugated polymers, which ultimately affects their conductivity. , However, the investigation of novel side chains remains a relatively infrequent area of research .…”

Section: Introductionmentioning

confidence: 99%

Side Chain Effects on the Conductivity of Phenothiazine-Derived Polyaniline

Giri,

Ma,

Almtiri

et al. 2024

Chem. Mater.

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Side chain alkyl groups have become the standard for incorporating solubilizing groups into conjugated polymers. However, the variety of alkyl groups available and their location on the polymer's backbone can contribute to the packing of the polymer chains in many different ways, resulting in many different morphologies in the polymer that can affect its properties and performances. In this paper, we investigate the effects on the conductivity of nine phenothiazine-containing polyaniline derivatives (P1−P9) with alkyl or aryl side chains on the phenothiazine core while also varying the number of methyl groups on the pphenylenediamine unit. 1 H nuclear magnetic resonance spectroscopy, ultraviolet−visible spectroscopy, differential scanning calorimetry, scanning electron microscopy, atomic force microscopy, and wide-angle X-ray scattering (WAXS) were all used to study the polymers' structures, physical and thermal properties, and morphologies. The t-butylphenyl substituent on the phenothiazine core seems to provide more rigidity in the polymer's backbone resulting in higher T g for series 3, while series 2 containing the 2hexyldecyl-substituted polymers had the lowest T g , which is attributed to the large volume of the side chain, that limits interchain interactions. Consequently, series 2 had the lowest conductivity. However, the strongest effect on the conductivity was seen from the tetramethyl groups on the PPDA unit, which resulted in the lowest conductivity in each series due to torsional strain (twisting) in the polymer's backbone. The WAXS data suggest mostly amorphous films; thus, the conductivity in these materials seems to be dominated by a multiscale charge transport phenomenon that occurs in amorphous conjugated materials. Our results will aid in the understanding of side chain engineering of PANI derivatives for their optimum performances.

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“…33 We have shown that the strapped monomers generate soluble linear 1D-p-conjugated polymers of higher molecular weight (M n : 23 kDa) 33,34 without the need for pendant solubilizing chains, and 2D-oligomers without pendant solubilizing chains. 35 This is mainly because the straps reduce interchain interactions, allowing the polymer chains to grow in solution.…”

Section: Introductionmentioning

confidence: 99%

Using molecular straps to engineer conjugated porous polymer growth, chemical doping, and conductivity

Mohanan,

Ahmad,

Ajayan

et al. 2023

Chem. Sci.

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A twist in the non-slanted H-mers to control π-conjugation in 2-dimensions and optical properties

Abstract: Understanding the structural parameters that determine the extension of π-conjugation in 2-dimensions is key for controlling the optical, photophysical, and electronic properties of 2D-π-conjugated materials. In this article, three non-slanted...

Cited by 7 publications

References 52 publications

π-Face strapped monomers enable self-stabilized hyperbranched π-conjugated polymer particles

π-Face strapped monomers enable self-stabilized hyperbranched π-conjugated polymer particles

Side Chain Effects on the Conductivity of Phenothiazine-Derived Polyaniline

Using molecular straps to engineer conjugated porous polymer growth, chemical doping, and conductivity

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