Article
Polymer Science
Tomaz Kotnik, Gregor Zerjav, Albin Pintar, Ema Zagar, Sebastijan Kovacic
Summary: A new synthetic route to transition-metal free pi-conjugated polyHIPEs was reported, combining Schiff-base condensation reaction and emulsion-templating technology. The resulting highly porous azine- or imine-linked poly(arylene) networks exhibit high chemical resistance, thermal stability, and visible-light harvesting ability. Their photocatalytic properties were investigated in the degradation of aniline dissolved in water.
Article
Chemistry, Applied
Shouli Ming, Hui Zhang, Shijie Zhen, Yingxue Zhang, Baoyang Lu, Jinsheng Zhao, Guangming Nie, Jingkun Xu
Summary: Fluorine atom substituted conjugated polymers exhibit enhanced photoelectric performance but hinder ion transport due to molecular aggregation. In this study, two fluorine substituted hybrid conjugated polymers were prepared, and their differences in molecular structure and properties were investigated.
Article
Chemistry, Applied
Peiyu Wu, Shengxiong Zhang, Wenjun Zhang, Weijie Song
Summary: In this study, a new D-A structure polymer PPDOTTPD was synthesized by Stille coupling, and its electrochromic and electrofluorochromic properties were investigated for the first time. The results showed that PPDOTTPD exhibited outstanding electrochromic and electrofluorochromic performance. The dual-functional device based on PPDOTTPD showed high optical and fluorescence contrast. These findings provide possibilities for developing high-performance intelligent optical devices.
Article
Polymer Science
Zhujun Gao, Fei Zhao, Shouli Ming, Yan Zhang, Jinsheng Zhao
Summary: Two donor-acceptor (D-A) type conjugated porous polymers (CPPs), P(TPA-TBTh) and P(TPA-F-TBTh), were synthesized on ITO glass electrodes through Stille coupling reaction under solvothermal conditions. The CPPs exhibited ambipolar properties in electrochromic switching and showed different morphologies. The introduction of fluorine atoms onto the polymer skeleton reduced the energy levels and band gap, resulting in a lower band gap for P(TPA-F-TBTh). Additionally, the non-fluorinated and di-fluorinated CPPs exhibited different electrochromic kinetic properties. These D-A type CPPs provide new designs for multicolor electrochromic materials with ambipolar properties and rare green reduction states.
Article
Energy & Fuels
Duygu Cevher, Sevki Can Cevher, Levent Toppare, Ali Cirpan
Summary: This study investigates the role of donor compartments, specifically 3-hexylthiophene and ethylenedioxythiophene (EDOT) in donor-acceptor-donor (D-A-D) type conjugated polymers (CPs). The study also highlights the potential of indenoquinoxalinone-based acceptors in electrochromic supercapacitors.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Engineering, Environmental
Sayan Halder, Siddhant Garg, Chanchal Chakraborty
Summary: Indicative electrochromic supercapatteries with high energy and power densities are gaining attention as a promising renewable energy source. This study developed a non-conjugated pyridinium cation-containing ligand and its metallo-supramolecular polymer. The polymer exhibited excellent electrochromic properties and good supercapacitive behavior, leading to the creation of a hybrid energy storage device with high capacitance, energy density, and cycle stability.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Haichang Fu, Shuanma Yan, Tao Yang, Maoxing Yin, Ling Zhang, Xiongchao Shao, Yujie Dong, Weijun Li, Cheng Zhang
Summary: A new dual conjugated polymer electrochromic device has been successfully developed, showing reversible color changes between yellow and green with excellent performance, offering a potential solution for adaptive camouflage applications.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Applied
Duygu Cevher, Sevki Can Cevher, Ali Cirpan
Summary: In this study, benzotriazole-based homopolymer (P-TBtz), copolymer (C-TBtzEdot), and bilayer composites (BTBtzEdot and B-EdotTBtz) were successfully prepared by electrochemical polymerization. The selected materials introduced multichromic property and improved charge storage capacity to the polymer films. Various electrochemical and optical characterizations were performed to evaluate the properties of the films. C-TBtzEdot exhibited the highest capacitance value among the films.
Article
Chemistry, Multidisciplinary
Yannan Liu, Shuai Fu, Dominik L. Pastoetter, Arafat Hossain Khan, Yingying Zhang, Arezoo Dianat, Shunqi Xu, Zhongquan Liao, Marcus Richter, Minghao Yu, Miroslav Polozij, Eike Brunner, Gianaurelio Cuniberti, Thomas Heine, Mischa Bonn, Hai Wang, Xinliang Feng
Summary: The ability to efficiently synthesize vinylene-linked two-dimensional covalent organic frameworks (V-2D-COFs) is crucial for their potential applications in electronics and optoelectronics. In this study, the E/Z selectivity of the Wittig reaction was tailored by using a suitable catalyst and increasing the reaction temperature, resulting in the successful synthesis of four crystalline V-2D-COFs. The high charge carrier mobilities and good crystallinity of these V-2D-COFs were demonstrated through non-contact terahertz spectroscopy analysis.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Multidisciplinary Sciences
Xuesong Xie, Jingjing Li, Zhengyue Xing, Bingan Lu, Shuquan Liang, Jiang Zhou
Summary: This study proposes a green and programmable electro-cross-linking strategy to synthesize highly hierarchical Zn-alginate electrolytes via superionic binding between carboxylate groups and Zn2+. The resulting electrolyte exhibits high reversibility, long-time stability, and high biocompatibility, making it suitable for modern wearable and implantable devices.
NATIONAL SCIENCE REVIEW
(2023)
Article
Chemistry, Physical
Dheeraj Devadiga, M. Selvakumar, Deepak Devadiga, Selvaraj Paramasivam, T. N. Ahipa, Prakasha Shetty, S. Senthil Kumar
Summary: A novel organic sensitizer, NHC, with a donor-pi-acceptor architecture, is synthesized and used in dye-sensitized solar cells (DSSCs). The synthesized dye exhibits good photophysical, electrochemical, and photovoltaic performances. In addition, the use of HMIm(+)I(-) as a dopant in the polymer-based electrolyte solution improves the conductivity and efficiency of DSSCs. Co-sensitization of NHC with Z907 results in higher photovoltaic performance compared to using Z907 alone.
SURFACES AND INTERFACES
(2022)
Article
Chemistry, Multidisciplinary
Linglong Ye, Yinuo Yang, Chunhui Liu, Xiaopeng Duan, Shijie Wang, Wei Li, Xiaobo Sun, Tao Wang, Wei Ma, Weiwei Li, Yanming Sun
Summary: A cross-linking strategy is employed to create a three-dimensional network structure, enhancing the mechanical properties of copolymers. The synthesized cross-linked conjugated copolymers, PC2, PC5, and PC8, with different monomer ratios, exhibit higher power conversion efficiencies (PCE) when blended with Y6 acceptor compared to the random linear copolymer, PR2. Additionally, the flexible PSC based on PC2:Y6 retains approximately 88% of the initial efficiency value after 2000 bending cycles, outperforming the PR2:Y6-based device with only 12.8% remaining initial PCE.
Article
Materials Science, Multidisciplinary
Merve Icli Ozkut, Ahmet M. Onal, Atilla Cihaner
Summary: This study investigated the electrochemical and electro-optical properties of four different dual electrochromic devices. Soluble donor-acceptor-donor (D-A-D) type conjugated electrochromic polymers based on didecyl substituted 3,4-propylenedioxythiophene and heterodiazole analogs were used in all devices and coated on ITO electrodes. The devices exhibited color changes from green to blue under applied external voltage, and their switching times, coloration efficiencies, and stabilities were evaluated.
Article
Chemistry, Multidisciplinary
Jun Zhu, Shaofei Wu, Xudong Hou, Jishan Wu
Summary: A novel 1,6-anthrazoline (AZ)-linked crystalline 2D polymer was successfully prepared via acid mediated Friedlander synthesis, with its structure and crystallinity confirmed through experiments and simulation. The dynamic feature of the synthesis process played a crucial role in the favorable formation of the polymer, providing a rational way to access kinetically stable 2D crystalline polymers.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Physical
Yue-Dang Xia, Yue Cheng, Yuan-Jian Wu, Yan Xia, Xue-Bo Yin
Summary: Highly conjugated 2D-COFs show aggregation-caused quenching but conducive to aggregation-induced emission luminogens (AIEgens) due to their viscous microenvironment. In this study, salicylaldehyde azine (SA) was formed for the first time through condensation between non-AIE monomers in a 2D azine COF (ACOF). A hollow ACOF (HACOF) with improved dispersibility and accessibility was achieved by growing the ACOF on a sacrificial template and digesting it under mild acidic conditions. The HACOF exhibited strong red emission, high quantum yield, and broad response range for sensing ammonia (NH3). The emission mechanism of HACOF was attributed to intramolecular hydrogen bonding, which could be quenched by NH3. This novel HACOF provides insights into structure-dependent emission and quenching mechanisms for functionalized AIE COFs.
CHEMISTRY OF MATERIALS
(2023)
Article
Chemistry, Physical
Haeryang Lim, Insu Jeong, Jiyong Choi, Giwon Shin, Jeongsu Kim, Tae-Hyun Kim, Taiho Park
Summary: An aryl ether-free polymer with pendent ammonium groups and propyl spacers was synthesized. The propyl spacers improved the flexibility of the polymer and allowed for effective ionic cluster formation. The resulting polymer exhibited excellent membrane-forming properties, high ionic conductivity, alkaline stability, and cell performance.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Physical
Dokyoung Kim, Dohyun Kim, Sehun Oh, Taiho Park, Kijung Yong
Summary: This study successfully enhanced the HER activity in alkaline solutions by incorporating oxophilic metals into WP/WOx films. Nanostructure engineering was employed to further improve the HER performance, and the prepared Co:WP/WO NWs catalyst exhibited superior performance in alkaline media.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Inorganic & Nuclear
Kochan Sathyaseelan Bejoymohandas, Hae Un Kim, Sunyoung Sohn, Wanuk Choi, Sungjune Jung, Filippo Monti, Taiho Park
Summary: Three new cationic cyclometalated iridium(III) complexes with different substituents have been synthesized and characterized. The electronic properties of these complexes have been tuned by changing the substituents on the ligands. The emission of all complexes arises from ligand-centered triplet states with different photoluminescence quantum yields.
INORGANIC CHEMISTRY
(2023)
Article
Energy & Fuels
Hyun Ho Shin, Junil Choi, Taiho Park, Won Bae Kim
Summary: Anode-supported proton-conducting solid oxide fuel cells (PC-SOFCs) fabricated with two different proton-conducting oxides, BaCe0.7Zr0.1Y0.1Yb0.1O3-delta (BCZYYb) and BaZr0.8Y0.2O3-delta (BZY), were compared to investigate their electrochemical performances when fueled with syngas. The BCZYYb cells exhibited higher maximum power density (MPD) than the BZY cells when operating on H-2, but degraded more rapidly when operating on syngas. Decreasing the anode thickness improved the stability of BCZYYb cells on syngas. Heterogeneous catalysis experiments showed no significant difference in catalytic activity between the anode powders prepared with the two proton-conducting oxides.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2023)
Article
Polymer Science
Sang Ah Park, Do Hui Kim, Yelim Choi, Dae Hwan Lee, Taiho Park, Shinuk Cho, Minjun Kim
Summary: Molecular self-aggregation and crystallization behavior of a newly synthesized asymmetrically incorporated fluorine atom polymer (asy-PNDI1FTVT) were found to differ from two symmetric acceptor polymers. The asy-PNDI1FTVT exhibited lower crystallinity compared to the symmetric polymers. In performance tests of inverted polymer solar cells, PTB7-Th:asy-PNDI1FTVT showed a well-mixed morphology and enhanced charge dissociation, leading to an increase in short-circuit current and power conversion efficiency.
Article
Chemistry, Applied
Hae Un Kim, Taehyun Kim, Chanhyeok Kim, Taiho Park, Sunyoung Sohn
Summary: This study introduces two novel deep-red to near-infrared (NIR) light-emitting curcuminoid boron difluoride derivatives, tBuPZ and PZ, for organic light-emitting diodes. The maximum external quantum efficiency achieved was 4.11% and 3.92%, respectively, with electroluminescence at 618 nm and a shoulder peak at 673 nm. The correlations between electron-donating strength, emission mechanism, and quantum efficiency were investigated by analyzing the donor characteristics of di-tert-butyl substitution. This study presents a methodology for designing low-toxicity, dye-derived, purely organic NIR light-emitting molecules.
Article
Chemistry, Physical
Yuna Kim, Clemence Allain, Regis Guillot, Pierre Audebert
Summary: This article describes a tetrazine derivative that exhibits color-tunable crystals upon external stimuli. By heating and cooling processes, Bis(4-methylphenoxy)tetrazine (1) forms crystalline phases with photoluminescence color transitions ranging from green to red. These thermoresponsive polymorphisms and colors can be reversibly recovered by solvent vapor annealing. Additionally, the unique T-shape arrangement of the tetrazine rings and the phenyl rings leads to the formation of flexible crystals.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2023)
Article
Multidisciplinary Sciences
Dace Gao, Gurunathan Thangavel, Junwoo Lee, Jian Lv, Yi Li, Jing-Hao Ciou, Jiaqing Xiong, Taiho Park, Pooi See Lee
Summary: In this article, the authors present a new iontronic adhesive for designing a soft iontronic gripper with self-healability, tunable adhesion, and rapid release. This adhesive provides a promising route for augmenting robotic functionalities with continuous and reversible adhesion force.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Dae Hwan Lee, Seyeong Lim, Chanhyeok Kim, Han Uk Lee, Dasol Chung, Yelim Choi, Jongmin Choi, Younghoon Kim, Sung Beom Cho, Hong Il Kim, Taiho Park
Summary: Researchers designed three types of dopant-free hole transport materials for perovskite quantum dot solar cells, and the optimized material, Asy-PSeDTS, achieved the highest power conversion efficiency (PCE) and stability among dopant-free HTM-based PQD-SCs so far, maintaining 80% of the initial PCE after 40 days.
ACS ENERGY LETTERS
(2023)
Review
Chemistry, Multidisciplinary
Minsu Han, Kenya Kani, Jongbeom Na, Jeonghun Kim, Yoshio Bando, Tansir Ahamad, Saad M. Alshehri, Yusuke Yamauchi
Summary: Nanoarchitectonics involves the control of physical and chemical properties, surface charge or energy, and atomic arrangements in materials at the nanoscale, allowing for precise modification of materials for specific applications. In metal materials, nanoarchitecture has a significant impact on activity, selectivity, and stability, particularly in platinum-group metals (PGMs) which are highly efficient in energy and environmental applications. This article provides a comprehensive review of synthetic methods for morphological control of metal nanomaterials, classifying them into different atomic arrangements and nanoporous structures. It also highlights future challenges in achieving novel metal nanoarchitecture and offers valuable insights for designing and synthesizing innovative metal nanostructures.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Review
Chemistry, Multidisciplinary
Miharu Eguchi, Minsu Han, Yusuke Asakura, Jonathan P. Hill, Joel Henzie, Katsuhiko Ariga, Alan E. Rowan, Watcharop Chaikittisilp, Yusuke Yamauchi
Summary: Reactions at surfaces and interfaces require well-designed structures. Nano-architecting of available space is necessary to combine bulk material and void spaces. The materials space-tectonics methodology has been proposed to overcome limitations, develop functional structures, and integrate with emerging technologies.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Physical
Jun-Ho Park, Youjin Reo, Ju-Hyun Jung, Taehyun Kim, Taiho Park, Yong-Young Noh, Cheol-Joo Kim
Summary: In this study, it was demonstrated that the van der Waals contact of aluminum onto a two-dimensional tin halide perovskite significantly enhanced the photoluminescence intensity, reaching a record-high PL quantum yield of 10%. The study emphasizes the importance of controlling electronic doping to optimize luminescence efficiency in low-dimensional perovskites.
ACS ENERGY LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Dohyun Kim, Hyuntae Choi, Wooteak Jung, Chanhyeok Kim, Eun Young Park, Sungryong Kim, Nam Joong Jeon, Seulki Song, Taiho Park
Summary: In order to improve the efficiency and stability of perovskite solar cells (PSCs), a method of interfacial engineering involving thermal phase transition is used in this study. By liquidizing alkylammonium formates at low temperatures, the perovskite grain boundaries can be effectively modified, leading to enhanced thermal stability and moisture stability of the PSCs. This strategy has successfully achieved highly efficient and stable PSCs.
ENERGY & ENVIRONMENTAL SCIENCE
(2023)
Article
Chemistry, Physical
Jianyong Yu, Juhua Yun, Shuo Zang, Minsu Han, Xuhui Sun, Zequn Wang, Yuman Zhou, Aslam Khan, Meng An, Jianguo Li, Shuo Chen, Yusuke Yamauchi, Zhanhui Yuan
Summary: In this study, a novel compact hydrogel fiber fabric evaporator is created by integrating hydrogel and fabric, which exhibits excellent evaporation rates and salt resistance, and has the potential for large-scale production. The evaporator achieves an exceptional evaporation rate of 4.13 kg m- 2 h-1 in brine without salt deposition. This has significant implications for addressing freshwater shortage crisis.
Article
Chemistry, Applied
Wenkai Zhu, Meiling Chen, Jieun Jang, Minsu Han, Yeonggyun Moon, Junghwan Kim, Jungmok You, Song Li, Teahoon Park, Jeonghun Kim
Summary: Nanocellulose-based aerogels have shown great potential as lightweight and porous materials for CO2 capture. Amino-functionalized nanocellulose aerogels were prepared and exhibited attractive properties in CO2 adsorption, thermal stability, and CO2/CH4 mixture separation.
CARBOHYDRATE POLYMERS
(2024)
