Article
Environmental Sciences
Serhat Uzan
Summary: The existing reducing agents for methylene blue decolorization are soluble in water and the reduction process is carried out in a homogeneous redox reaction medium. However, these reducing agents often remain in the reaction medium after decolorization, leading to chemical pollution of textile wastewater. To address this issue, a water-insoluble redox active azo polymer was synthesized for heterogeneous reduction of methylene blue. The kinetic parameters of this redox reaction were investigated and compared with those of the azo polymer monomer (1,4-dihydroxybenzene).
ENVIRONMENTAL POLLUTION
(2023)
Article
Chemistry, Multidisciplinary
Xiyue Peng, Yuan Xie, Ardeshir Baktash, Jiayong Tang, Tongen Lin, Xia Huang, Yuxiang Hu, Zhongfan Jia, Debra J. Searles, Yusuke Yamauchi, Lianzhou Wang, Bin Luo
Summary: The development of cost-effective and long-life rechargeable aluminium ion batteries with a new cathode material has promising prospects for sustainable energy storage applications. By using a low-cost AlCl3/urea electrolyte, a heteroatom pi-conjugated polymer featuring synergistic C=O and C=N active centres is reported to show high discharge capacity and long cycle life, outperforming most Al-organic batteries reported to date.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Multidisciplinary
Daohao Li, Binbin Wang, Xiaojing Long, Wenjia Xu, Yanzhi Xia, Dongjiang Yang, Xiangdong Yao
Summary: Introducing an asymmetry strategy by designing conjugated polymer catalysts with different degrees of asymmetry can adjust the charge distribution of active centers, leading to improved catalytic activity in the oxygen reduction reaction.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Multidisciplinary
Xinlei Wang, Jijun Xiao, Weihua Tang
Summary: The study presents the design of polymer cathodes for highly efficient and robust aqueous zinc-ion batteries, investigating the impact of pendant configuration on their performance. It demonstrates potential for large-scale applications by showing outstanding molecular planarity and reversible redox reaction of the hydroquinone-derived cathode.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Energy & Fuels
Mengna Qin, Meng Qin, Yanjun Shi, Juan Xu, Jianyu Cao
Summary: In this study, a redox-active anthraquinone-based conjugated polymer was synthesized via electrochemical polymerization and used as a high-capacity anode material for aqueous hybrid flow batteries. The polymer displayed a two-electron-transfer redox reaction at -0.616V in alkaline electrolytes and exhibited fast redox kinetics. When paired with a potassium ferrocyanide catholyte, the battery achieved an open circuit voltage of approximately 1.09V, high specific capacity (103.6 mA h g-1 at 2 A g-1), and large mass power density (9.41 W g-1 at 100 % SOC), with excellent capacity retention (99.948 % per cycle) and energy efficiency (74.1 %) after 100 cycles.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Chemistry, Multidisciplinary
Xiang Zhao, Xuan Qiu, Haodong Xue, Si Liu, Dingli Liang, Chuan Yan, Weinan Chen, Yonggang Wang, Gang Zhou
Summary: Organic p-type cathode materials have gained attention for their higher redox potentials and rate capabilities. However, most of the p-type cathodes based on one-electron redox still have limited stability and low specific capacity. In this study, two polymers, CPP and NCPP, containing two-electron redox dihydrophenazine, were developed as p-type cathode materials. The results show that the conjugated linkage in CPP is more favorable for charge delocalization and oxidation at higher potentials, leading to a higher reversible specific capacity of 184 mAh g(-1) and excellent cycling stability.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Polymer Science
Hao-Xuan Guo, Yuriko Takemura, Daisuke Tange, Junichi Kurata, Hiroyuki Aota
Summary: In this study, redox-active polymers were synthesized step by step on a gold electrode to optimize their electrochemical performance. An automatic sequential polymerization equipment was designed to minimize human intervention in the stepwise polymerization reaction. The degree of polymerization of the polymer grown on the gold electrode can be controlled by adjusting the cycle of the sequential operation. As the number of cycles increases, the amount of accumulated charge increases proportionally, indicating the potential for enhanced electrochemical performance.
Article
Chemistry, Multidisciplinary
Miao Zhao, Edward Leggett, Struan Bourke, Souzana Poursanidou, Sadie Carter-Searjeant, Steve Po, Marciano Palma do Carmo, Lea Ann Dailey, Philip Manning, Sean G. Ryan, Laura Urbano, Mark A. Green, Aliaksandra Rakovich
Summary: Conjugated polymer nanoparticles (CPNs) based on PTB7 were prepared and evaluated for their potential in theranostic applications involving bioimaging and photosensitization. The CPNs showed efficient NIR-I transparency for bioimaging and demonstrated photosensitizing capabilities in both aqueous solutions and cell cultures. The photosensitizing ability of CPNs was found to be influenced by the stabilizing shell material, with Pluronic F-127 leading to enhanced ROS production and poly[styrene-co-maleic anhydride] completely quenching the process.
Article
Chemistry, Physical
Yu-Jen Shao, Tzu-Chieh Yen, Chien-Chieh Hu, Guey-Sheng Liou
Summary: To investigate the diffusivity of counter ions in polymers with intrinsic microporous structures during the electrochemical process, non-planar and V-shaped Troger's base (TB) was introduced. The TB-incorporated polyamides showed enhanced electrochromic properties and high switching response speeds while maintaining similar transmittance change. Furthermore, the triarylamine-based polyamide demonstrated excellent charge-discharge ability and distinct color changes, making it suitable for electrochromic supercapacitor materials.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Chemistry, Organic
Michela Lupi, Stefano Menichetti, Paola Stagnaro, Roberto Utzeri, Caterina Viglianisi
Summary: A series of thia-bridged triarylamine[4]helicene-functionalized polynorbornenes were successfully synthesized via ROMP, showing reversible electrochromic behavior in response to pH changes.
SYNTHESIS-STUTTGART
(2021)
Article
Chemistry, Analytical
Xiaofeng Jin, Guanhua Li, Tailin Xu, Lei Su, Dan Yan, Xueji Zhang
Summary: The study focused on immobilizing glucose oxidase on ruthenium-based conjugated polymer and metal-organic framework nanocomposites to fabricate a novel glucose sensor, improving performance and reducing applied potential. The sensor demonstrated satisfactory accuracy in simulated blood samples.
Article
Energy & Fuels
Qinzheng Hu, Shuzhen Cui, Kanjun Sun, Xiuting Shi, Wenxing Miao, Xiangbing Wang, Hui Peng, Guofu Ma
Summary: The focus of recent research on flexible supercapacitors is to improve their energy density. A recent study has reported an improved energy storage method by adding suitable redox additives to gel electrolytes to enhance their redox activity. This study presents a novel stretchable and redox-active hydrogel electrolyte, prepared through polymerization and solvent displacement, which shows superior stretchability and high energy density. The introduction of a redox additive further enhances the specific capacitance and energy density. This study provides a new strategy for designing multifunctional redox hydrogel electrolytes.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Chemistry, Multidisciplinary
Zhipeng Xiang, Wenjin Li, Kai Wan, Zhiyong Fu, Zhenxing Liang
Summary: This work develops an electrochemical method to quantitatively study the aggregation behavior of methyl viologen dichloride molecules and finds that aggregation behavior can effectively regulate the molecule's energy level and redox potential. It not only provides a method to investigate molecular aggregation, but also demonstrates the feasibility to tune the performance of redox flow batteries by regulating aggregation behavior.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Physical
Zhongjie Yang, Yang Gao, Lulu Zuo, Chang Long, Caoyu Yang, Xiaofei Zhang
Summary: A diatomic hetero-cyclization strategy was employed to construct efficient 2e-ORR catalysts based on poly-benzimidazole, poly-benzoxazole, and poly-benzothiazole. The sulfuration of poly-benzothiazole resulted in higher H2O2 selectivity and electrochemical durability, achieving one of the highest values for PBXs as 2e-ORR catalysts.
Article
Chemistry, Multidisciplinary
Yahao Dai, Shilei Dai, Nan Li, Yang Li, Maximilian Moser, Joseph Strzalka, Aleksander Prominski, Youdi Liu, Qingteng Zhang, Songsong Li, Huawei Hu, Wei Liu, Shivani Chatterji, Ping Cheng, Bozhi Tian, Iain McCulloch, Jie Xu, Sihong Wang
Summary: Organic electrochemical transistors (OECTs) have high amplification and sensitivity to biological signals, making them a promising platform for next-generation bioelectronics. However, achieving seamless tissue-electronics interfaces with softness and stretchability has been a challenge due to the lack of stretchable redox-active semiconducting polymers. This study reports a stretchable semiconductor for OECT devices, which exhibits exceptional stretchability and high OECT performance. The polymer's design features, including a nonlinear backbone architecture, moderate side-chain density, and high molecular weight, enable the combination of stretchability and OECT performance. The highly stretchable polymer semiconductor allows for fabricating intrinsically stretchable OECTs with high transconductance and biaxial stretchability, and demonstrates on-skin electrocardiogram recording with built-in amplification and unprecedented skin conformability.
ADVANCED MATERIALS
(2022)
Article
Polymer Science
Tomoyuki Kurioka, Takahiro Komamura, Naoki Shida, Teruaki Hayakawa, Ikuyoshi Tomita, Shinsuke Inagi
Summary: The ordered structure of poly(3-(2-ethylhexyl)thiophene) (P3EHT) films can be controlled by changing the solvent used to prepare them. The successful electrochemical post-functionalization (ePF) of P3EHT films is attributed to their greater electrochemical conductivity compared to amorphous P3EHT films.
MACROMOLECULAR CHEMISTRY AND PHYSICS
(2022)
Article
Polymer Science
Alvin Tanudjaja, Ryoyu Hifumi, Shinsuke Inagi, Ikuyoshi Tomita
Summary: In this study, an organometallic polymer monomer containing fused metallacyclic building block was successfully synthesized. By controlling the synthesis conditions, a black-colored polymer with good solubility in organic solvents and stability was obtained, and its optical properties were investigated.
Editorial Material
Chemistry, Organic
Shinsuke Inagi, Mahito Atobe
BEILSTEIN JOURNAL OF ORGANIC CHEMISTRY
(2022)
Article
Chemistry, Analytical
Yulin Shi, Elena Villani, Yequan Chen, Yaqian Zhou, Zhenghao Chen, Altaf Hussain, Guobao Xu, Shinsuke Inagi
Summary: Bipolar electrochemistry has gained renewed interest as an effective approach for materials synthesis due to its unique features compared to conventional electrochemistry, such as wireless electrode reactions and gradient potential distribution. In this study, we report the high-throughput electrosynthesis of gradient polypyrrole films using a new electrochemical cell design called the single-electrode electrochemical system (SEES). The SEESs consist of multiple microelectrochemical cells attached to an indium tin oxide electrode, allowing for parallel electrochemical reactions to be carried out simultaneously and controlled by a single electrode. The use of SEES has been shown to be a convenient and cost-effective strategy for high-throughput electrosynthesis and has opened up a new approach for rapid condition screening in gradient film preparation.
ANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Analytical
Tomoki Hirohata, Susumu Kawauchi, Ikuyoshi Tomita, Shinsuke Inagi
Summary: This paper investigates the electrochemical reduction behavior of the new redox-active hexagonal macrocycle pillar[6]quinone (P[Q]6) in the presence of Li+ ions dissolved in an aprotic solvent using density functional theory calculations. The results show that the electrostatic repulsion between quinone units determines the multi-electron reduction behavior of P[Q]6, which is consistent with the voltammetric measurements. The lithiation process involves bridging of adjacent carbonyl groups by Li+ ions and the formation of coordination bonds outside the macrocycle, and the calculated lithiation potentials correspond to the voltammogram waveform. Preliminary calculations involving two macrocycles confirm intermolecular lithium coordination. These findings enhance our understanding of the electrochemical properties of P[Q]6 and its potential application in redox materials.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Hideyuki Nojima, Takashi Shimoda, Shinsuke Inagi, Toshio Fuchigami
Summary: Various anodic substitution reactions, including fluorination, methoxylation, acetoxylation, and cyanation, of heteroatom compounds containing sulfur or nitrogen were comparatively studied using boron-doped diamond (BDD), Pt, and glassy carbon (GC) anodes. It was found that BDD anode, similar to Pt anode, is highly effective for these reactions despite both BDD and GC electrodes being carbon-based materials.
ISRAEL JOURNAL OF CHEMISTRY
(2023)
Article
Electrochemistry
Toshiyasu Fujita, Shinsuke Inagi, Toshio Fuchigami
Summary: Anodic oxidation of PhTeR (R = CF3CH2, CF2H, Me, Ph) was performed in methanol with various supporting electrolytes (YO- M+) such as p-tosylate, benzenesulfonate, acetate, and benzoate salts using a divided cell, yielding predominantly monomeric PhRTe(OY)(2) and dimeric PhR(OY)Te-O-TePhR(OY) compounds in moderate to good yields.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Zhenghao Chen, Yaqian Zhou, Elena Villani, Naoki Shida, Ikuyoshi Tomita, Shinsuke Inagi
Summary: Recently, it has been found that poly(3,4-ethylenedioxythiophene) (PEDOT) fibers can be produced from bipolar electrodes in acetonitrile solution using alternating current (AC)-bipolar electro-polymerization. This study extends this method to ionic liquid (IL) media and explores the growth of PEDOT fibers in three different ILs. The obtained PEDOT morphologies were found to be influenced by the physicochemical properties of the ILs.
Article
Chemistry, Organic
Yushi Ohno, Shogo Ando, Daisuke Furusho, Ryoyu Hifumi, Yuuya Nagata, Ikuyoshi Tomita, Shinsuke Inagi
Summary: Here, a facile and selective synthesis of cationic azatriphenylene derivatives was achieved through electrochemical intramolecular cyclization, where the key step involves atom-economical C-H pyridination without a transition-metal catalyst or an oxidant. This proposed strategy provides a practical approach for introducing cationic nitrogen (N (+)) into pi-electron systems, thus expanding the molecular design of N (+)-doped polycyclic aromatic hydrocarbons.
Article
Chemistry, Multidisciplinary
Tomoki Shirokura, Tomoki Hirohata, Kosuke Sato, Elena Villani, Kazuyasu Sekiya, Yu-An Chien, Tomoyuki Kurioka, Ryoyu Hifumi, Yoshiyuki Hattori, Masato Sone, Ikuyoshi Tomita, Shinsuke Inagi
Summary: We report a novel synthetic methodology that utilizes an electrogenerated acid (EGA) as an effective Bronsted acid catalyst for imine bond formation and provides the corresponding COF film deposited on the electrode surface. The COF structures obtained with this method exhibited high crystallinities and porosities, and the film thickness could be controlled. Furthermore, this process was applied for the synthesis of various imine-based COFs, including a three-dimensional (3D) COF structure.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Materials Science, Multidisciplinary
Elena Villani, Yanyun Zhang, Zhenghao Chen, Yaqian Zhou, Mariko Konishi, Ikuyoshi Tomita, Shinsuke Inagi
Summary: In this study, we developed poly(3,4-ethylenedioxythiophene)(PEDOT) thin films and their composites, such as PEDOT-copper (PEDOT-Cu) and PEDOT-polythiophene (PEDOT-PT), on a nonconductive substrate using AC-bipolar electropolymerization. These films were then utilized as wireless electrodes for the generation of luminol electrochemiluminescence (ECL). The intensity and spatial distribution of the ECL light emission were found to be correlated with the conductivity and composition of the different polymer films.
ACS APPLIED POLYMER MATERIALS
(2023)
Article
Polymer Science
Yoshimasa Matsumura, Alvin Tanudjaja, Mizuki Fukushima, Makoto Higuchi, Shin Ogino, Makoto Ishidoshiro, Yasuyuki Irie, Hiroaki Imoto, Kensuke Naka, Ryoyu Hifumi, Shinsuke Inagi, Ikuyoshi Tomita
Summary: Donor-acceptor type p-conjugated polymers with heterole units were synthesized by reacting a regioregular organometallic polymer containing both reactive titanacyclopentadiene and electron-donor thiophene-2,5-diyl units in the main chain with electrophiles. A polymer with an electron-accepting phosphole unit was obtained with a 54% yield and a number-average molecular weight (M(n)) of 3,000 and a molecular weight distribution (M(w)/M(n)) of 1.9. The obtained polymer showed a narrow band gap energy level (E(g)) of 1.78 eV due to the alternating structure of thiophene and phosphole.
DESIGNED MONOMERS AND POLYMERS
(2023)
Article
Chemistry, Multidisciplinary
Olesja Koleda, Tobias Prenzel, Johannes Winter, Tomoki Hirohata, Maria de Jesus Galvez-Vazquez, Dieter Schollmeyer, Shinsuke Inagi, Edgars Suna, Siegfried R. Waldvogel
Summary: Cathodic synthesis enables the sustainable access to 1-hydroxy- and 1-oxy-quinazolin-4-ones utilizing easily accessible nitro starting materials. This method features mild reaction conditions, inexpensive and reusable carbon-based electrode materials, an undivided electrochemical setup, and constant current conditions. The use of sulphuric acid as a supporting electrolyte and cyclization catalyst, along with the broad applicability demonstrated with 27 differently substituted derivatives achieving high yields (up to 92%), emphasizes its significance for preparative applications. Mechanistic studies based on cyclic voltammetry measurements reveal the selective reduction of nitro substrates to hydroxylamines as a crucial step.
Article
Chemistry, Multidisciplinary
Yaqian Zhou, Elena Villani, Tomoyuki Kurioka, Yanyun Zhang, Ikuyoshi Tomita, Shinsuke Inagi
Summary: In this study, an electrochemical strategy for precise control of the location of aggregation-induced emission (AIE) molecules on patterned electrodes is reported, resulting in photoluminescent and electrochemiluminescent patterns with a variety of colors. Combining the electrooxidation process with various conducting polymers (CPs) and bipolar electrochemistry, gradient luminescent patterns can be easily achieved. The findings suggest that this electrochemical method provides a way to develop abundant luminescent patterns.
Article
Polymer Science
Alvin Tanudjaja, Makoto Higuchi, Tomohiro Imai, Yoshimasa Matsumura, Ryoyu Hifumi, Shinsuke Inagi, Ikuyoshi Tomita
Summary: pi-Conjugated poly(arylene ethynylene)s containing both thiophene-2,5-diyl and fused metallacycles were synthesized and studied for their optoelectronic features. The polymers showed solubility in organic solvents, narrow optical band gaps, and bathochromic shift in the absorption spectra.
Article
Materials Science, Multidisciplinary
Katerina Skopalova, Itana Nusa Bubanja, Dragomir Stanisavljev, Nikola Cvjeticanin, Vera Kasparkova, Eliska Dad'ova, Erika Pavlikova, Marek Koutny, Marija Gizdavic-Nikolaidis, Petr Humpolicek
Summary: This study compares the biological properties of PANI prepared by different synthesis methods and oxidizing agents, which improves its potential applications in the biomedical field.
Article
Materials Science, Multidisciplinary
Hui-Ping Li, Cai-Yan Gao, Zhi-Ping Chen, Xin-Heng Fan, Lian-Ming Yang
Summary: In this study, a novel type of D-A non-fused-ring copolymers was designed and synthesized to overcome the trade-off relationship between electrical conductivity and Seebeck coefficient in organic semiconductors. The incorporation of fluorine atoms into the polymer backbone effectively increased the ordered degree of molecular stacking and improved both the electrical conductivity and Seebeck coefficient. The bimodal orientation of polymers played a crucial role in decoupling the correlation between electrical conductivity and Seebeck coefficient.
Article
Materials Science, Multidisciplinary
Mansour A. S. Salem, Amjad Mumtaz Khan, Hatem A. M. Saleh, Khalil M. A. Qasem, Mizna Ahmed, Aadil Shafi Bhat, Abdulaziz Abdullah Qasem Ali, Younes S. A. Ghanem, Ali Alrabie, Abdel-Basit Al-Odayni, Waseem Sharaf Saeed, Basheer Al-Anesi
Summary: This research focuses on the versatile substance, polyaniline/layered double hydroxide (PANI@Nd-Co/LDH), under solvothermal conditions. A thorough analysis of its structure and morphology was conducted using various analytical methods. The findings showed that PANI@Nd-Co/LDH exhibited highly sensitive and specific fluorescence detection of Pb(II) and Al(III), outperforming other heavy metal ions. The sensor demonstrated a turn-off fluorescence response for Pb(II) ions and a turn-on fluorescence response for Al(III) ions. The minimum detectable limits (MDL) were determined to be 9.6 nM for Pb(II) and 220 nM for Al(III). PANI@Nd-Co/LDH could be easily regenerated and reused for multiple cycles. The detection mechanisms involved the inner filter effect (IFE) for Pb(II) and the chelation-enhanced fluorescence (CHEF) effect for Al(III). These results highlight the excellent potential of PANI@Nd-Co/LDH in the detection and recognition of Pb(II) and Al(III) ions.