Search citation statements
Paper Sections
Citation Types
Year Published
Publication Types
Relationship
Authors
Journals
Open‐shell conjugated polymers with a high intrinsic conductivity and high‐spin ground state hold considerable promise for applications in organic electronics and spintronics. Herein, two novel acceptor‐acceptor (A‐A) conjugated polymers based on a highly electron‐deficient quinoidal benzodifurandione unit have been developed, namely DPP‐BFDO‐Th and DPP‐BFDO. The incorporation of the quinoidal moiety into the polymers backbones enables deeply aligned lower‐lying lowest unoccupied molecular orbital (LUMO) levels of below −4.0 eV. Notably, DPP‐BFDO exhibits an exceptionally low LUMO (−4.63 eV) and a high‐spin ground state characterized by strong diradical characters. Moreover, a self‐doping through intermolecular charge‐transfer is observed for DPP‐BFDO, as evidenced by X‐ray photoelectron spectroscopy (XPS) studies. The high carrier concentration in combination with a planar and linear conjugated backbone yields a remarkable electrical conductivity (σ) of 1.04 S cm−1 in the “undoped” native form, ranking among the highest values reported for n‐type radical‐based conjugated polymers. When employed as an n‐type thermoelectric material, DPP‐BFDO achieves a power factor of 12.59 μW m−1 K−2. Furthermore, upon n‐doping, the σ could be improved to 65.68 S cm‐1. This study underscores the great potential of electron‐deficient quinoidal units in constructing dopant‐free n‐type conductive polymers with a high‐spin ground state and exceptional intrinsic conductivity.
Open‐shell conjugated polymers with a high intrinsic conductivity and high‐spin ground state hold considerable promise for applications in organic electronics and spintronics. Herein, two novel acceptor‐acceptor (A‐A) conjugated polymers based on a highly electron‐deficient quinoidal benzodifurandione unit have been developed, namely DPP‐BFDO‐Th and DPP‐BFDO. The incorporation of the quinoidal moiety into the polymers backbones enables deeply aligned lower‐lying lowest unoccupied molecular orbital (LUMO) levels of below −4.0 eV. Notably, DPP‐BFDO exhibits an exceptionally low LUMO (−4.63 eV) and a high‐spin ground state characterized by strong diradical characters. Moreover, a self‐doping through intermolecular charge‐transfer is observed for DPP‐BFDO, as evidenced by X‐ray photoelectron spectroscopy (XPS) studies. The high carrier concentration in combination with a planar and linear conjugated backbone yields a remarkable electrical conductivity (σ) of 1.04 S cm−1 in the “undoped” native form, ranking among the highest values reported for n‐type radical‐based conjugated polymers. When employed as an n‐type thermoelectric material, DPP‐BFDO achieves a power factor of 12.59 μW m−1 K−2. Furthermore, upon n‐doping, the σ could be improved to 65.68 S cm‐1. This study underscores the great potential of electron‐deficient quinoidal units in constructing dopant‐free n‐type conductive polymers with a high‐spin ground state and exceptional intrinsic conductivity.
Open‐shell conjugated polymers with a high intrinsic conductivity and high‐spin ground state hold considerable promise for applications in organic electronics and spintronics. Herein, two novel acceptor‐acceptor (A‐A) conjugated polymers based on a highly electron‐deficient quinoidal benzodifurandione unit have been developed, namely DPP‐BFDO‐Th and DPP‐BFDO. The incorporation of the quinoidal moiety into the polymers backbones enables deeply aligned lower‐lying lowest unoccupied molecular orbital (LUMO) levels of below −4.0 eV. Notably, DPP‐BFDO exhibits an exceptionally low LUMO (−4.63 eV) and a high‐spin ground state characterized by strong diradical characters. Moreover, a self‐doping through intermolecular charge‐transfer is observed for DPP‐BFDO, as evidenced by X‐ray photoelectron spectroscopy (XPS) studies. The high carrier concentration in combination with a planar and linear conjugated backbone yields a remarkable electrical conductivity (σ) of 1.04 S cm−1 in the “undoped” native form, ranking among the highest values reported for n‐type radical‐based conjugated polymers. When employed as an n‐type thermoelectric material, DPP‐BFDO achieves a power factor of 12.59 μW m−1 K−2. Furthermore, upon n‐doping, the σ could be improved to 65.68 S cm‐1. This study underscores the great potential of electron‐deficient quinoidal units in constructing dopant‐free n‐type conductive polymers with a high‐spin ground state and exceptional intrinsic conductivity.
The rapid development of flexible conductive materials has promoted the research on conductive polymer (CP)‐based materials. However, CPs have relatively low thermal conductivity (TC), which can result in severe heat dissipation problems for device applications. In this work, core–sheath structured polyaniline@boron nitride (BN@PANI) composites were prepared by in‐situ growth strategy, in which PANI nanowire arrays were uniformly anchored to the surface of BN microrods. Thanks to the particular structure, the as‐prepared BN@PANI composite shows excellent thermal management capabilities. Specifically, the TC of the BN@PANI composite is 4.32 W/m·K at low BN loading of 10 wt%, which is almost 17.8 times that of pure PANI. Moreover, the excellent heat dissipation performance is intuitively presented through infrared imaging technology. Impressively, the PANI nanowire arrays are vertically arranged on the BN surface to form a conductive pathway, which results in conductivity comparable to pure PANI. This work broadens the ideas for preparing high‐performance CP‐based composites by using insulating fillers.Highlights Core–sheath structured BN@PANI composites were prepared by an in‐situ growth strategy. The thermal conductivity of composite was 4.32 W/m·K at 10 wt% BN loading. The introduction of BN had little effect on the conductivity of PANI. The BN@PANI composites possessed excellent thermal management capability. This work contributes to understanding heat transport in conductive polymers.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.