Article
Chemistry, Multidisciplinary
Chu Chu, Yuancheng Qin, Cailing Ni, Jianping Zou
Summary: A series of adjustable Donor-acceptor (D-A) benzothiodiazole-based conjugated polymers were designed and synthesized in this study. The photocatalytic performance of the polymers could be improved by fine-tuning the chemical structure through halogen substitution. The polymers exhibited excellent optoelectronic properties and showed effective catalytic activity in the degradation of dyes and the coupling of benzylamines. The findings provide insights into the design and synthesis of benzothiadiazole-based conjugated polymers as promising organic photocatalysts for solar energy conversion.
CHINESE CHEMICAL LETTERS
(2022)
Article
Nanoscience & Nanotechnology
Changzhi Han, Liwen Hu, Shenglin Jin, Jiaxin Ma, Jia-Xing Jiang, Chong Zhang
Summary: Conjugated microporous polymer (CMP) photocatalysts with D-p-A-A structure, especially with optimized content of BTDO acceptor, exhibit enhanced photocatalytic activity for solar-driven hydrogen generation due to their electronic structure, reaction sites availability, and the separation of photoexcited charges.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Review
Materials Science, Multidisciplinary
Xuelong Huang, Ning Lan, Weiming Chen, Yunnan Yan, Wei Zeng, Shengjian Liu
Summary: Low-bandgap conjugated polymers with photocurrent response to near-infrared wavelength play a crucial role in optoelectronic technologies. These polymers can achieve a wide range of spectral responses and enhance the short-circuit current in photovoltaics. Future research directions should focus on addressing challenges and exploring new possibilities in the design of NIR polymers.
JOURNAL OF MATERIALS SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Nimisha Kaippamangalath, Arunkumar Chitteth Rajan, Praveen C. Ramamurthy
Summary: Alkylated fluorene-based conjugated porous polymers (CPPs) were developed for electrochemical detection of nitroaromatics (NAs). Two CPPs with modified morphologies, PPHF and PPTHF, exhibited improved porosity and charge transfer to NAs. PPTHF, featuring a thiophene moiety, showed superior sensing capabilities for 1,2-dinitrobenzene (1,2-DNB). Computational analysis confirmed strong bindings. This work introduces a novel approach for real-time safety monitoring and effective electrochemical sensing of NAs.
Article
Chemistry, Physical
Lening Shen, Tao Zhu, Xinwen Zhang, Keven Gong, He Wang, Xiong Gong
Summary: This study presents high-performance perovskite solar cells (PSCs) based on a composite of perovskite and a low optical gap conjugated polymer. The composite film exhibits enhanced charge carrier mobility, larger crystal sizes, and suppressed non-radiation charge carrier recombination. Additionally, a photo-induced charge transfer occurs within the composite film, leading to improved power conversion efficiency (PCE) of the PSCs. The un-encapsulated PSCs also demonstrate enhanced stability and reduced photocurrent hysteresis compared to those based on pristine perovskite films.
Article
Polymer Science
S. Karpagam, P. Anupriya, N. Supraja
Summary: This study investigated the property changes of conjugated polymers composed of BTTP and BTTP-CN during the chemical doping process. The absorption peaks and emission wavelengths of the polymers were significantly shifted after doping, and the electrochemical band gap decreased while the conductivity increased. The introduction of dopants to the conjugated polymers opens up opportunities for increasing conjugation, controlling fluorescence, and shifting energy levels in solar cell applications.
Article
Mechanics
Shu-liang Cheng, Xiao-feng Li, Qun Yan, Bin Wang, Yong-tao Sun, Ya-jun Xin, Qian Ding, Hao Yan, Liang Wang
Summary: This paper presents two novel cruciate ligament structures that contribute significantly to lightweight design of metamaterials, band gap tuning, and ultra-wide and ultra-low frequency vibration and noise reduction, as well as providing a new design idea. The novelty of this paper lies in combining Bloch's theorem and finite element method to calculate the band gap, using the transfer function to verify the evaluation; using structural optimization and applying active strain to test the structural tunability; and illustrating the wave propagation and band gap opening mechanism from the vibration mode and energy perspectives. The results show that the structure has excellent vibration and sound insulation effect, with a wide range of band gap opening under active strain.
EUROPEAN JOURNAL OF MECHANICS A-SOLIDS
(2023)
Article
Chemistry, Physical
Kenneth-John J. Bell, Allison M. Kisiel, Evan Smith, Aimee L. Tomlinson, Graham S. Collier
Summary: Researchers have successfully synthesized a new conjugated polymer through a simple synthetic method, demonstrating its excellent performance in terms of absorption, oxidation, and electrochromism. The study shows that this polymer offers a synthetically simple alternative to current state-of-the-art conjugated polymers.
CHEMISTRY OF MATERIALS
(2022)
Article
Engineering, Civil
Linyun Zhou, Wenwen Han, Shui Wan
Summary: This article investigates the band gap structure of elastic metamaterials, focusing on the design challenges of lightweight and low frequency band gaps. The use of inerter-based dynamic vibration absorbers is proposed to achieve low frequency band gaps.
THIN-WALLED STRUCTURES
(2022)
Article
Chemistry, Multidisciplinary
Haifen Liu, Zixuan Zhu, Huafeng Li, Weili Fan, Kaihua Ning, Chao Su, Jingpeng Ren, Lixin Wang
Summary: Non-fullerene acceptors have garnered significant attention in the field of organic solar cells in recent years for their ability to boost power conversion efficiencies. This study introduces a novel wide bandgap donor polymer with promising potential to improve efficiency, highlighting the importance of molecular design in developing high-performance conjugated molecules.
NEW JOURNAL OF CHEMISTRY
(2021)
Article
Chemistry, Physical
Tsubasa Mikie, Masahiro Hayakawa, Kenta Okamoto, Keitaro Iguchi, Shuhei Yashiro, Tomoyuki Koganezawa, Masatomo Sumiya, Hiroyuki Ishii, Shigehiro Yamaguchi, Aiko Fukazawa, Itaru Osaka
Summary: The charge carrier mobility of pi-conjugated polymers has significantly improved over the past two decades by increasing the pi-pi stacking ability. A new pi-conjugated polymer based on a quinoidal bithiophene moiety was synthesized, showing significantly extended pi-electron delocalization and higher intrachain charge carrier transport compared to its isomer. This study provides new guidelines for designing pi-conjugated polymers with high intrachain charge carrier transport.
CHEMISTRY OF MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Jinming Chen, Dongyan Li, Mingbin Su, Yonghong Xiao, Hui Chen, Man Lin, Xiaolan Qiao, Li Dang, Xiao-Chun Huang, Feng He, Qinghe Wu
Summary: In this study, a multifluorinated unit 4,5,6,7-tetrafluoronaphtho[2,1-b:3,4-b']dithio-phene (FNT) and its polymers PFNT-F and PFNT-Cl were reported. The advantages of multifluorination include low-lying HOMO and wide band gap, high film crystallinity and efficient hole transport, as well as well-defined nanofibrous morphology and face-on orientation in blend films. The PFNT-F/Cl:N3 based OSCs achieved impressive FF values of 0.80 and remarkable PCEs of 17.53% and 18.10%, making them the best donor materials in OSCs. This work provides new insights into the rational design of high-performance polymers through the multifluorination strategy.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Fei Ye, Qiang Liu, Hongliang Dong, Kailin Guan, Zhaoyang Chen, Na Ju, Linfeng Hu
Summary: A novel poly(phenazine-alt-pyromellitic anhydride) (PPPA) has been synthesized as a promising cathode material in organic zinc-ion batteries. The PPPA cathode exhibits a reversible Zn2+-coordination mechanism and an ultrahigh Zn2+ diffusion coefficient, which is the highest among all organic cathode materials for zinc-ion batteries. The extended pi-conjugated plane in PPPA sample contributes to a significant reduction in energy gap, promoting intramolecular electron transfer during charge/discharge process.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Multidisciplinary
Tugba Haciefendioglu, Erol Yildirim
Summary: This study models, analyzes, and compares over 50 different acceptor units using computationally extracted data from density functional theory. It finds that the structural properties of acceptor units have a dominant effect on their frontier electronic energy levels, particularly the dihedral angle between the acceptor, donor, and bridge units, bond order, and hyperpolarizability.
Article
Chemistry, Multidisciplinary
Byoung Yun Jeon, Alemayehu Kidanemariam, Juran Noh, Chohee Hyun, Hyun Jung Mun, Kangho Park, Seung-Jin Jung, Yejee Jeon, Pil J. Yoo, JaeHong Park, Hee-Tae Jung, Tae Joo Shin, Juhyun Park
Summary: We have developed aqueous dispersions of conjugated polymer nanowires with enhanced light absorption properties through a series of processes, forming highly organized layer structures in CPNWs for aqueous-based applications. This approach opens up a new route to fabricate nanowires of low-band-gap linear conjugated polymers with improved charge transfer efficiencies.
Article
Polymer Science
Yuanzhang Jiang, Xuyi Wang, Yanting Han, Dakai Gong, Yingchun Gu, Lin Tan
Summary: In this study, FeCl3 and poly(acrylic acid) (PAA) were doped into waterborne polyurethanes (WPUs) to create multifunctional materials with self-healing and antimicrobial properties. WPU/Fe/PAA-5.5, containing 5.5 wt % PAA, exhibited excellent mechanical properties, strong self-healing capabilities, and an impressive antimicrobial rate of over 90%. These supramolecular films were also highly recyclable through hot-pressing.
Article
Polymer Science
Longyu Tian, Min Wang, Guangming Liao, Baoliang Liu, Sujuan Zhang, Yucheng Sun, Zhen Meng, Jintao Zhang, Zaijun Lu
Summary: Two kinds of benzoxazine monomers were synthesized and used to prepare polybenzoxazine anion exchange membranes (AEMs) with quaternary ammonium functionalization. The LQPBZ AEM exhibited better ion conductivity and alkaline stability.
Article
Polymer Science
Claire A. Lemarchand
Summary: This study investigates the shock behavior of three different polymers through molecular dynamics simulations. The results reveal specificities in the shock behavior of polymers, including deviations from the linear relation between shock velocity and particle velocity, as well as differences in shear stress relaxation behind the shock front. It is found that the deviation of the Hugoniot locus is related to the change in the relative contribution of bonding and non-bonding potential energies, while polymers with higher glass transition temperatures exhibit slower shear stress relaxation.
Article
Polymer Science
Zengquan Liu, Xiaochun Yin, He Zhang, Shuo Gao, Qinglin Kuang, Yanhong Feng
Summary: A powder solid-state extension (PSSE) technology was proposed to address the high melt viscosity issue of UHMWPE. By uniaxial extension and sintering in the solid state, a highly self-reinforced material was prepared. X-ray diffraction and scattering techniques were used to study the structural evolution during the PSSE process, and a solid-phase induced transformation model was established.
Article
Polymer Science
Zhike Li, Anyu Luo, Rui Zhou, Xin Li, Haiyan Li
Summary: A novel high temperature resistance IL@SiO2 nanocapsules were successfully prepared and their friction and wear properties in PA6 composites were studied. The addition of IL@SiO2 nanocapsules reduced the friction coefficient and wear rate without affecting the mechanical properties of PA6. The synergy between the IL core and SiO2 wall in the nanocapsules improved the self-lubricating performance of the PA6 composites.
Article
Polymer Science
Xin Liu, Xuhong Guo, Qi Liao
Summary: In this study, an algorithm for accurately estimating viscosity is developed using molecular dynamics simulations and the Green-Kubo formula. This algorithm can be applied to complex systems with long correlations, such as macromolecular and biological simulation systems.
Article
Polymer Science
Hao Pu, Yun-Lei Hou, Jing -Zhou Chen, Dong -Lin Zhao
Summary: The use of modified graphene improves the interfacial adherence of carbon fibers to epoxy resin, resulting in enhanced interfacial and bending properties of CF and matrix in CF/EP composites, as well as increased interlaminar shear strength and flexural strength.
Article
Polymer Science
Wei-Chung Ke, Jin-Wei Lin, Manohar Reddy Busireddy, Yueh-Hsing Lee, Jiun-Tai Chen, Chain-Shu Hsu
Summary: This study introduces a crosslinkable monomer, TAIC, to synthesize three crosslinked polyimide films, which exhibit improved thermal, mechanical, and dielectric properties. The introduction of TAIC enhances the tensile strength, reduces the dielectric constant and dielectric loss, and decreases the coefficient of thermal expansion of the polyimide films.
Article
Polymer Science
Alex Kwasi Kumi, Ruiling Fan, Ye Chen, Yumei Zhang
Summary: The difference in leaching of amylopectin from cellulose/amylopectin/1-butyl-3-methylimidazolium chloride ([Bmim][Cl]) blends during regeneration in water and aqueous ethanol has been studied. Molecular dynamics simulations showed that the dissolution and regeneration mechanisms of amylopectin in [Bmim][Cl] are similar to cellulose in ionic liquids. Water regeneration leads to weak electrostatic interactions, resulting in high leaching of amylopectin. In contrast, ethanol-water interactions enhance electrostatic interactions among amylopectin chains, limiting amylopectin leaching in aqueous ethanol.
Article
Polymer Science
Xi Zeng, Junwei Zhou, Junbiao Peng, Chunsheng Zhang, Danling Wang, Yihu Song, Qiang Zheng
Summary: This study utilizes an oligomer deep eutectic solvent (DES) based on polyethylene glycol to regulate the vulcanization kinetics of rubber. The results show that the DES can accelerate vulcanization at low temperatures without affecting the crosslinking density and Mullins effect.
Article
Polymer Science
Qianqian Yue, Yongfei Peng, Xingjian Liu, Aihua He, Huarong Nie
Summary: The addition of metal deactivators can effectively suppress the aging of TBIR, prolong its lifespan, and have no negative effects on its physical and processing properties. These research findings are of great importance for improving the stability and aging resistance of polymers.
Article
Polymer Science
J. Gomez-Caturla, J. Ivorra-Martinez, R. Tejada-Oliveros, V Moreno, D. Garcia-Garcia, R. Balart
Summary: This work focuses on the development of environmentally friendly PLA formulations by using different esters derived from geraniol as plasticizers. The results show that these esters have good compatibility with PLA, and they can effectively enhance the elongation and plasticity of PLA, reduce its glass transition temperature, and slightly improve its water absorption capabilities.
Article
Polymer Science
Dandan Li, Zhaohui Lu, Zhao Ke, Ke Xu, Fengna Dai, Youhai Yu, Guangtao Qian, Chunhai Chen
Summary: In this study, cross-linked PI aerogel membranes with low dielectric constant and high moisture resistance were prepared by co-polymerization and scraping coating technology. The incorporation of fluorinated blocks and benzimidazole ring structures resulted in novel PI aerogel membranes with fascinating dielectric properties and outstanding moisture resistance.
Article
Polymer Science
Zhaoyang Chu, Qing Zhang, Haihua Luo, Han Zhou, Fapei Zhang, Wei Chen, Wenhua Zhang
Summary: Multi-physical fields solution processing strategy is a universal and facile method for preparing various conjugated polymer films and high-performance devices. In this study, we employed a combined microfluidic flow and ultrasonication strategy (FU) for processing CP solutions, and found a pronounced synergetic effect in promoting the pre-ordering of chains in solution. The conformation order and anisotropy of the solution were revealed through various characterizations. A non-classical nucleation model for polymer crystallization in non-equilibrium solution processing was confirmed. The roles of microfluidic flow and ultrasonication in chain aggregation and crystallization were addressed through multi-physical simulations. Compared to pristine solutions, the FU strategy showed improved solution anisotropy and crystallization kinetics, resulting in higher crystallinity in films and increased mobilities in OFET devices. The FU processing strategy provides a universal approach for regulating chain conformation and aggregation in conjugated polymer solutions.