Truncated conjugation in fused heterocycle-based conducting polymers: when greater planarity does not enhance conjugation

Marín-Beloqui, José Manuel; Gómez, Sandra; Gonev, Hristo Ivov; Comí, Marc; Al‐Hashimi, Mohammed; Clarke, Tracey M.

doi:10.1039/d2sc06271b

Cited by 4 publications

(2 citation statements)

References 67 publications

(78 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

Section: Introductionmentioning

confidence: 99%

“…Studying these processes enhances our understanding of fundamental physical phenomena, facilitates the development of new theoretical models, and guides the design of novel materials with tailored properties. [6][7][8] Polycyclic aromatic hydrocarbons (PAHs) are p-conjugated organic molecules that consist of multiple fused aromatic rings. They are naturally found as products from the incomplete combustion of organic materials, forest fires, and volcanic eruptions.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Coronene: a model for ultrafast dynamics in graphene nanoflakes and PAHs

Martín Santa Daría,

González-Sánchez,

Gómez

2024

Phys. Chem. Chem. Phys.

Self Cite

View full text Add to dashboard Cite

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Coronene: a model for ultrafast dynamics in graphene nanoflakes and PAHs

Martín Santa Daría,

González-Sánchez,

Gómez

2024

Phys. Chem. Chem. Phys.

Self Cite

View full text Add to dashboard Cite

show abstract

Spiral‐Structured Dielectric Polymers Exhibiting Ultrahigh Energy Density and Charge–Discharge Efficiency at High Temperatures

Ran

Wang

et al. 2023

Advanced Materials

View full text Add to dashboard Cite

The growing need for high‐power and compact‐size energy storage in modern electronic and electrical systems demands polymer film capacitors with excellent temperature capability. However, conventional polymer dielectrics feature dramatic deterioration in capacitive performance under concurrent high temperature and electric field, because the high thermal stability traditionally relies on the conjugated, planar molecular segments in the polymer chains. Herein, inspired by the stable double helix structures of deoxyribonucleic acid, we demonstrate spiral‐structured dielectric polymers that exhibit simultaneous high thermal stability and great capacitive performance. Both the experimental results and computational simulations confirm that the spiral groups serve to weaken the electrostatic molecular interaction, induce proper molecular chain stacking structure, and regulate the charge transfer process by breaking the conjugated planes and introducing deep trap sites. The resultant polymer exhibits the maximum discharged energy densities of 7.29 and 6.13 J/cm3 with the charge‐discharge efficiency above 90% at 150 and 200 °C, respectively, more than 10 times those of the original dielectric at the same conditions. The present work offers a completely new dimension for the molecular design of polymers, giving rise to well‐balanced thermal and dielectric properties, and ultimately the desired capacitive energy storage performance at high temperatures.This article is protected by copyright. All rights reserved

show abstract

Copper/Polyaniline Interfaces Confined CO₂ Electroreduction for Selective Hydrocarbon Production

Xu,

Zhao,

Kochubei

et al. 2024

ChemSusChem

View full text Add to dashboard Cite

Polyaniline (PANI) provides an attractive organic platform for CO2 electrochemical reduction due to the ability to adsorb CO2 molecules and in providing means to interact with metal nanostructures. In this work, a novel PANI supported copper catalyst has been developed by coupling the interfacial polymerization of PANI and Cu nanoparticles. The hybrid catalyst demonstrates excellent activity towards production of hydrocarbon products including CH4 and C2H4, compared with the use of bare Cu nanoparticles. A faradaic efficiency of 71.8% and a current density of 16.9 mA/cm2 were achieved at ‐0.86V vs. RHE, in contrast to only 22.2% and 1.0 mA/cm2 from the counterpart Cu catalysts. The remarkably enhanced catalytic performance of the hybrid PANI/Cu catalyst can be attributed to the synergistic interaction between the PANI underlayer and copper nanoparticles. The PANI favours the adsorption and binding of CO2 molecules via its nitrogen sites to form *CO intermediates, while the Cu/PANI interfaces confine the diffusion or desorption of the *CO intermediates favouring their further hydrogenation or carbon‐carbon coupling to form hydrocarbon products. This work provides insights into the formation of hydrocarbon products on PANI‐modified Cu catalysts, which may guide the development of conducting polymer‐metal catalysts for CO2 electroreduction.

show abstract

Truncated conjugation in fused heterocycle-based conducting polymers: when greater planarity does not enhance conjugation

Abstract: A Raman spectroscopy and theoretical study to find an unconventional structure-property relationship. A larger planarity forms an alternative truncated conjugation pathway that hinders the beneficial a-conjugation selenophene pathway.

Cited by 4 publications

References 67 publications

Coronene: a model for ultrafast dynamics in graphene nanoflakes and PAHs

Coronene: a model for ultrafast dynamics in graphene nanoflakes and PAHs

Spiral‐Structured Dielectric Polymers Exhibiting Ultrahigh Energy Density and Charge–Discharge Efficiency at High Temperatures

Copper/Polyaniline Interfaces Confined CO₂ Electroreduction for Selective Hydrocarbon Production

Contact Info

Product

Resources

About

Truncated conjugation in fused heterocycle-based conducting polymers: when greater planarity does not enhance conjugation

Abstract: A Raman spectroscopy and theoretical study to find an unconventional structure-property relationship. A larger planarity forms an alternative truncated conjugation pathway that hinders the beneficial a-conjugation selenophene pathway.

Cited by 4 publications

References 67 publications

Coronene: a model for ultrafast dynamics in graphene nanoflakes and PAHs

Coronene: a model for ultrafast dynamics in graphene nanoflakes and PAHs

Spiral‐Structured Dielectric Polymers Exhibiting Ultrahigh Energy Density and Charge–Discharge Efficiency at High Temperatures

Copper/Polyaniline Interfaces Confined CO2 Electroreduction for Selective Hydrocarbon Production

Contact Info

Product

Resources

About

Copper/Polyaniline Interfaces Confined CO₂ Electroreduction for Selective Hydrocarbon Production