Linear and star-shaped π-conjugated oligoanilines: a review on molecular design in syntheses and properties

Moini, Nasrin; Jahandideh, Arash; Shahkarami, Fatemeh; Kabiri, Kourosh; Piri, Farideh

doi:10.1039/d2py00038e

Cited by 6 publications

(6 citation statements)

References 245 publications

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“…The higher T m may postpone the curing process, that is, T m = 84°C and T curing_peak = 135°C, compared to T m = 70°C and T curing_peak = 125°C. In fact, the symmetric structure of the S‐TAH with four oligoanilines as arms can be self‐assembled and represent columnar order on account of hydrogen bonding and π‐π stacking 29 . Polyaniline crystals also melt at around 100°C while they have a much more repeating units and a tendency for crystallization 71 .…”

Section: Resultsmentioning

confidence: 99%

“…Another important thermal parameter which can be characterized by DSC is the glass transition temperature (T g ) of the resin before and 29 Polyaniline crystals also melt at around 100 C while they have a much more repeating units and a tendency for crystallization. 71 This behavior might affect the network properties favorably and unfavorably.…”

Section: Thermal Cure Behaviormentioning

confidence: 99%

“…Employing nonlinear architectures, that is, star‐shaped geometries, may provide a means to merge the advantages of polyaniline and linear oligoaniline. It offers narrow molecular weight dispersity, high processability, better applicability, appropriate crystallinity (order), and proper electrical and mechanical properties 29–32 …”

Section: Introductionmentioning

confidence: 99%

“…It offers narrow molecular weight dispersity, high processability, better applicability, appropriate crystallinity (order), and proper electrical and mechanical properties. [29][30][31][32] A conductive non-symmetrical and functional hanger-type starshaped oligoaniline (S-TA) has previously been synthesized using microwave irradiation. 33 This material may find possible application in biobased anaerobic adhesives.…”

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confidence: 99%

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Synthesis of multitask star‐shaped oligoaniline: Introducing a novel, efficient epoxy hardener

Shahkarami

Moini

Kabiri

et al. 2023

Polymers for Advanced Techs

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Multitask star-shaped oligoaniline (S-TAH) was synthesized using microwave irradiation in three steps: preparation of phthalic acid-capped tetra-aniline (as the arm), synthesis of a tetrafunctional biobased core, and subsequently, coupling arms to the core, using a divergent approach. A biobased core was synthesized through a direct condensation reaction of pentaerythritol, with L-lactic acid. The chemical structures were extensively characterized using Fourier-transform infrared and proton nuclear magnetic resonance spectroscopy. The performance of S-TAH, as a multitask hardener for bisphenol A-based epoxy resin (EP), was evaluated using differential scanning calorimetry, thermal gravimetric analysis, dynamic thermomechanical analyses (DMTA), and four-prob conductometry. Peaks of cure exotherms for S-TAH/EP (1:1) systems appear at 135 C with a tail-like peak around 175 C. Compared to conventional amine-cured EP, the thermal stability of the S-TAH/EP cured was significantly higher, that is, $ 40 C enhancement in half weight loss temperature (T 50 ). A threefold improvement in char yield was observed. From DMTA, the material cured with S-TAH displays representative storage moduli in glassy (9.4 GPa) and rubbery (5.2 GPa) states reflecting a uniform network and viscoelastic behavior. The electrical conductivities (σ) of the pure S-TAH and the epoxy systems cured with S-TAH/EP are 4.3 Â 10 À4 , and 2.65 Â 10 À4 , respectively. T star-shaped oligoaniline is a promising multitask hardener-functioning as hardener, thermal stabilizer, electrically conductive and toughening agents-which can be versatilely applied in thermal resistance anticorrosive coatings and conductive adhesives.

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Section: Resultsmentioning

confidence: 99%

Section: Thermal Cure Behaviormentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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confidence: 99%

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Synthesis of multitask star‐shaped oligoaniline: Introducing a novel, efficient epoxy hardener

Shahkarami

Moini

Kabiri

et al. 2023

Polymers for Advanced Techs

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“…This diversity in architecture has overcome certain limitations in drug delivery by personalizing nanoparticles with greater precision. These structures have unique physical and chemical properties that make them attractive for use in drug delivery systems [23]. Dendrimers, for instance, possess a highly branched, tree-like structure that provides precise control over their size and surface properties [24].…”

Section: Introductionmentioning

confidence: 99%

Recent Advances in Nanoparticle Development for Drug Delivery: A Comprehensive Review of Polycaprolactone-Based Multi-Arm Architectures

et al. 2023

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Controlled drug delivery is a crucial area of study for improving the targeted availability of drugs; several polymer systems have been applied for the formulation of drug delivery vehicles, including linear amphiphilic block copolymers, but with some limitations manifested in their ability to form only nanoaggregates such as polymersomes or vesicles within a narrow range of hydrophobic/hydrophilic balance, which can be problematic. For this, multi-arm architecture has emerged as an efficient alternative that overcame these challenges, with many interesting advantages such as reducing critical micellar concentrations, producing smaller particles, allowing for various functional compositions, and ensuring prolonged and continuous drug release. This review focuses on examining the key variables that influence the customization of multi-arm architecture assemblies based on polycaprolactone and their impact on drug loading and delivery. Specifically, this study focuses on the investigation of the structure–property relationships in these formulations, including the thermal properties presented by this architecture. Furthermore, this work will emphasize the importance of the type of architecture, chain topology, self-assembly parameters, and comparison between multi-arm structures and linear counterparts in relation to their impact on their performance as nanocarriers. By understanding these relationships, more effective multi-arm polymers can be designed with appropriate characteristics for their intended applications.

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Engineered Conductive Green Epoxy Hardener: Star-Shaped Bio-based Core Functionalized with Conjugated Oligoaniline via Microwave Irradiation

et al. 2023

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Linear and star-shaped π-conjugated oligoanilines: a review on molecular design in syntheses and properties

Abstract: Molecular Design and Synthesis of Linear and Star-shaped π-conjugated Oligoanilines with reversible optoelectrochemical properties.

Cited by 6 publications

References 245 publications

Synthesis of multitask star‐shaped oligoaniline: Introducing a novel, efficient epoxy hardener

Synthesis of multitask star‐shaped oligoaniline: Introducing a novel, efficient epoxy hardener

Recent Advances in Nanoparticle Development for Drug Delivery: A Comprehensive Review of Polycaprolactone-Based Multi-Arm Architectures

Engineered Conductive Green Epoxy Hardener: Star-Shaped Bio-based Core Functionalized with Conjugated Oligoaniline via Microwave Irradiation

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