Article
Chemistry, Applied
Qing Chang, Tao Ma, Chao Liu, Jinliang Hu, Xiaohong Cheng
Summary: Two bent shaped isomers based on benzo[1,2-b:4,3-b']dithiophene-pyridine have been synthesized, and the position of N-atom on the pyridine unit has significant effects on their self-assembly behavior and photophysical properties. The isomer with N in the para position can form a columnar liquid crystalline phase and emit enhanced yellow light when doped with L-tartaric acid, making it a potential material for WLED and chemosensors for volatile acid-base vapors.
Article
Chemistry, Organic
Manisha Durai, Linhao Liu, Pierre Frere, Thierry Roisnel, Veronique Guerchais, Henri Doucet
Summary: The reactivity of benzo[1,2-b: 4,5-']dithiophene-4,8-dione in Pd-catalyzed C-H arylation was studied. Selective mono-C2-arylated benzo[1,2-b: 4,5-b']dithiophene-4,8-diones were obtained using aryl bromides as aryl source and carbonate bases in 1,4-dioxane. These conditions were effective for coupling with various aryl bromides, including those with electron-rich and electron-poor substituents. Photophysical properties of arylated compounds were characterized through experimental and theoretical studies.
EUROPEAN JOURNAL OF ORGANIC CHEMISTRY
(2023)
Article
Polymer Science
Lingli Zhao, Wenhao Li, Hanwen Qin, Xingyu Yi, Weixuan Zeng, Yan Zhao, Huajie Chen
Summary: Two novel aromatic five-membered diimide (AFMDI) units were created using a UV-photocyclization protocol, and were successfully applied in the construction of conjugated copolymers. The resulting polymers exhibited a highly conjugated backbone, high electron deficiency, and low band gaps, making them promising candidates for n-type charge transport in all-polymer solar cells.
Article
Polymer Science
Lingli Zhao, Yanyan Cao, Hanwen Qin, Xi He, Zhiyuan Zhao, Yunlong Guo, Huajie Chen
Summary: We report the synthesis and characterization of a core-extended acceptor building block, 2,7-dibromobenzo[2,1-b:3,4-b ']dithiophene diimides (abbreviated as 2Br-NTI), which achieves high electron affinity and tunable solubility. By embedding the acceptor and electron-rich species into polymer backbones, the resulting conjugated copolymers exhibit near-linearly pi-extended conjugation and intriguing photophysical/electrochemical properties.
Article
Chemistry, Multidisciplinary
Pengjie Chao, Hui Chen, Mingrui Pu, Yulin Zhu, Liang Han, Nan Zheng, Jiadong Zhou, Xiaoyong Chang, Daize Mo, Zengqi Xie, Hong Meng, Feng He
Summary: In this study, the importance of the position of a chlorine atom in polymer solar cells (PSCs) charge carrier for enhancing photovoltaic performance was investigated. It was found that precise positioning of chlorine substitution can significantly improve the efficiency of donor polymers. The introduction of chlorine atom at specific locations in conjugated polymers resulted in outstanding power conversion efficiency in PSCs.
Article
Polymer Science
Jing Yang, Jiatao Wu, Xiaojun Yin, Fei Zhong, Fuhao Tang, Weixuan Zhang, Chunmei Gao, Lei Wang
Summary: This study synthetized six conjugated polymers with high bipolar conductivity and investigated the effect of polymer structures on polarity switching process. The results demonstrated that the conjugated phenyl groups play a crucial role in providing sufficient space and promoting doping efficiency, accelerating the polarity switching process. This research provides an in-depth understanding of the structure-function relationships in polarity switching and guides the design of efficient n-type thermoelectric polymers.
Article
Chemistry, Applied
Zhihui Liu, Huanran Feng, Lihao Guo, Tianqing Liu, Baofeng Zhao, Baohua Wu, Chao Gao, Wei Ma, Weiwei Wu
Summary: Research has found that ternary strategy is effective in enhancing the performance of organic solar cells (OSCs). In this study, a small molecule named BR-C12, which contains a benzo [1,2-b:4,5-b']dithiophene (BDT) core, was designed and synthesized. By incorporating BR-C12 as a third component in PM6:Y6 and PM6:L8-BO, the ternary devices showed improved power conversion efficiency and stability compared to binary devices. This work provides a method for constructing high-performance ternary OSCs and expands the range of available third components.
Article
Chemistry, Physical
Shuai Li, Ruilin Tang, Chuan Hu, Xiaobin Niu, Liping Wang
Summary: In order to improve the performance of lithium-ion batteries, researchers have developed a new electrolyte additive, 2-TFBP, to stabilize the interface of LiFe0.3Mn0.7PO4. Experimental results show that in the electrolyte containing 0.2% 2-TFBP, the capacity retention after 200 cycles is 83.78%, while without the addition of 2-TFBP, the capacity retention is only 53.94%. It is found that 2-TFBP can form a stable cathode electrolyte interphase (CEI) with poly-thiophene, which stabilizes the materials structure and suppresses the decomposition of electrolytes, and also promotes the deposition and exfoliation of Li+ ions.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Chemistry, Physical
Matteo Bartolini, Cosimo Micheletti, Alberto Picchi, Carmen Coppola, Adalgisa Sinicropi, Mariangela Di Donato, Paolo Foggi, Alessandro Mordini, Gianna Reginato, Andrea Pucci, Lorenzo Zani, Massimo Calamante
Summary: Luminescent solar concentrators (LSCs) are optical devices that can collect, downshift, and concentrate sunlight using emitting materials embedded in a polymer matrix. Combining LSCs with silicon-based photovoltaic (PV) devices is a proposed strategy to enhance their ability to harvest diffuse light and integrate them into built environments. The performance of LSCs can be improved by utilizing organic fluorophores with strong light absorption and redshifted emission.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Chemistry, Physical
Matteo Bartolini, Cosimo Micheletti, Alberto Picchi, Carmen Coppola, Adalgisa Sinicropi, Mariangela Di Donato, Paolo Foggi, Alessandro Mordini, Gianna Reginato, Andrea Pucci, Lorenzo Zani, Massimo Calamante
Summary: Luminescent solar concentrators (LSCs) are optical devices that use emitting materials embedded in a polymer matrix to harvest, downshift, and concentrate sunlight for improved integration with photovoltaic devices. In this study, a series of orange/red organic emitters were designed, synthesized, and characterized for use in LSCs. The compounds exhibited strong intramolecular charge-transfer states, with symmetric structures and moderate strength donor groups showing better photophysical properties for LSC applications. The best LSC built with these compounds demonstrated high photonic and PV performances, close to the state-of-the-art, along with sufficient stability in accelerated aging tests.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Chemistry, Applied
Tom Cardeynaels, Simon Paredis, Andrew Danos, Dirk Vanderzande, Andrew P. Monkman, Benoit Champagne, Wouter Maes
Summary: In the search for high-performance donor-acceptor type organic compounds with TADF properties, the novel donor component BDT-TIPS has been studied in combination with two known acceptors, leading to different emission behaviors such as TADF and RTP depending on the excited state ordering. Comparison with other donor-acceptor systems revealed that BDT-TIPS shows promising RTP properties when combined with TXO2, while a combination with CNQxP results in a mix of TADF and TTA delayed emission.
Article
Materials Science, Multidisciplinary
Jingtang Liang, Xuejiao Tang, Pan Yin, Chao Weng, Ping Shen
Summary: Utilizing benzo[1,2-b:4,5-b']dithiophene (BDT) as a building block, two new A-D-A small-molecule acceptors (SMAs) were developed with IDBDT-T outperforming IDBDT-O in terms of broader absorption spectrum and higher power conversion efficiency.
Article
Chemistry, Multidisciplinary
Yueyue Gao, Zuo Xiao, Minghuan Cui, Makhsud I. Saidaminov, Furui Tan, Luwen Shang, Wanpeng Li, Chaochao Qin, Liming Ding
Summary: This study presents the design and synthesis of novel conjugated copolymers with different π-bridge nature to enhance the dielectric constant of photovoltaic materials. The resulting organic solar cells exhibit efficient charge dynamics and high power conversion efficiencies.
ADVANCED MATERIALS
(2023)
Article
Biochemistry & Molecular Biology
Bruna M. Rodrigues, Henrique F. V. Victoria, Guilherme Leite, Klaus Krambrock, Otavio A. Chaves, Diego F. de Oliveira, Rafael de Q. Garcia, Leonardo De Boni, Luiz A. S. Costa, Bernardo A. Iglesias
Summary: This study synthesized and characterized new tri-cationic corrole derivatives that contained Pt(II) or Pd(II) complexes attached at the peripheral position of thienyl moieties. The corrole derivatives were characterized through various analysis techniques. Photophysical and theoretical calculations were used to investigate the singlet and triplet excited states, and spectroscopic techniques were used to evaluate the photobiological parameters. The binding capacity of the corrole derivatives with nucleic acids and human serum albumin was determined, and their potential for application in photodynamic therapeutic processes was studied.
JOURNAL OF INORGANIC BIOCHEMISTRY
(2023)
Article
Chemistry, Medicinal
Livio Racane, Katarina Zlatic, Maja Cindric, Emina Mehic, Grace Karminski-Zamola, Martin C. Taylor, John M. Kelly, Silvana Raic Malic, Marijana Radic Stojkovic, Marijeta Kralj, Marijana Hranjec
Summary: Novel benzo[b]thienyl and 2,2'-bithienyl-derived benzothiazoles and benzimidazoles were synthesized and tested for their antiproliferative and antitrypanosomal activities in vitro. The benzothiazole derivatives showed higher activity compared to the benzimidazole analogs. Among them, the 2,2'-bithienyl-substituted benzothiazoles with unsubstituted and 2-imidazolinyl amidine exhibited the most potent antitrypanosomal activity, while the benzimidazole derivatives bearing isopropyl, unsubstituted, and 2-imidazolinyl amidine showed the greatest selectivity. The 2,2'-bithiophene derivatives showed the most selective antiproliferative activity, with the benzothiazoles selectively active against lung carcinoma and the benzimidazoles selectively active against cervical carcinoma cells.
Article
Energy & Fuels
Yuzhang Wang, Qing Zhang, Yixing Li, Ming He, Shilie Weng
Summary: The water-air ratio, aftercooler effectiveness and regenerator effectiveness are key factors affecting the humidification performance and efficiency of the HAT cycle.
Article
Biotechnology & Applied Microbiology
Yu Jin, Qing Zhang, Xing Qin, Zhen Liu, Zhenxia Li, Xiaoxia Zhong, Lunguo Xia, Jie He, Bing Fang
Summary: This study found that carbon dots (CDs) with excellent biocompatibility can effectively attenuate osteoarthritis by promoting cartilage repair and regulating macrophages.
JOURNAL OF NANOBIOTECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Yanfei Zhu, Lidan Guo, Jun Guo, Luyang Zhao, Chunyan Li, Xueying Qiu, Yang Qin, Xianrong Gu, Xiangnan Sun, Zhiyong Tang
Summary: Quantum-confined atomically precise metal nanoclusters (MNCs) are a new type of inorganic-organic hybrid semiconductor that have been widely used in chemical sensing, optical imaging, biomedicine and catalysis. Researchers have successfully designed and fabricated a spin valve (SV) based on MNCs, demonstrating remarkable magnetoresistance values and the ability to change the spin-dependent transport properties by altering the atomic structure of the MNCs.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Engineering, Electrical & Electronic
Xiao-Chuang Jin, Jun-Guo Lu, Qing-Hao Zhang
Summary: The paper investigates the stability and stabilization problem of linear fractional-order time-delay systems. By introducing a free matrix, the systems are transformed into delay-free systems interconnected with uncertainties. New stability and stabilization criteria based on the small gain theorem are derived, expressed as linear matrix inequalities and computationally efficient. The proposed criteria are less conservative than existing ones, as shown in two numerical examples.
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS
(2023)
Article
Materials Science, Multidisciplinary
Yumeng Zhang, Qing Zhang, Yabo Wang, Xiaodong Wang
Summary: With the increase in strength of stainless steel, the use of stainless steel for structural components has also increased, making welding problems more important. This study characterized the microstructure of gas tungsten arc welding (GTAW) welded duplex stainless steel (DSS) using scanning electron microscope (SEM), electron backscatter diffraction (EBSD), and nanoindentation. The results showed that the welded DSS had high yield strength, ultimate tensile strength, and sufficient plasticity. The investigation of the microstructure origin related to the mechanical properties of the welded joint may provide insights for improving the welding process.
MATERIALS CHARACTERIZATION
(2023)
Article
Polymer Science
Wei Yang, Dayong Zhang, Junsheng Yu, Qing Zhang
Summary: Thiophene-pyrazine-thiophene building blocks with carboxamide or carbamate substituents were synthesized and compared in terms of crystal structures. The carboxamide substituent in the building block formed intermolecular hydrogen bonds, resulting in a twisted conformation and herringbone packing. The carbamate substituent formed intramolecular resonance-assisted hydrogen bonds (RAHBs), leading to a co-planar structure, extended pi-conjugation, and tight lamellar arrangement. Conjugated polymers based on these building blocks showed significant differences in optical, redox, and photovoltaic properties, with PC-BDT2 exhibiting a higher power conversion efficiency (PCE) of 7.9% compared to PI-BDT with a PCE of 0.1% due to the presence of intramolecular hydrogen bonds.
Article
Chemistry, Multidisciplinary
Qing Zhang, Fengqing Wang, Ruoyu Wang, Junlan Liu, Yupengxue Ma, Xiaoru Qin, Xiaoxia Zhong
Summary: Fluorescence mechanism of near-infrared (NIR) fluorescent carbon dots (CDs) is still uncertain and controversial. This study demonstrates that the protonation of amino groups increases the particle surface potential and disperses bulk sediments into nano-scale CDs. Moreover, the protonation of pyridinic nitrogen structures induces NIR fluorescence emission on CDs by narrowing the gap distance for photon transition. This research provides insights into activating CDs reaction sediments and triggering NIR emission, offering potential for developing CDs with ideal optical properties.
Review
Chemistry, Multidisciplinary
Lidan Guo, Shunhua Hu, Xianrong Gu, Rui Zhang, Kai Wang, Wenjing Yan, Xiangnan Sun
Summary: This article discusses the performance and functionalities of organic semiconductors, organic-inorganic hybrid perovskites, and 2D materials in advanced spintronics applications. The spin transport and spin manipulation properties of these materials are discussed separately, as well as the multifunctionalities arising from photoelectric and chiral-induced spin selectivity. The challenges and future perspectives of using these materials for advanced spintronics development are also presented.
ADVANCED MATERIALS
(2023)
Article
Engineering, Biomedical
Feng Yan, Ji-Hee Ha, Yuyang Yan, Sam B. B. Ton, Chen Wang, Bornface Mutembei, Zaid A. A. Alhajeri, Aubrey F. F. McNiel, Andrew J. J. Keddissi, Qinghao Zhang, Muralidharan Jayaraman, Danny N. N. Dhanasekaran, Qinggong Tang
Summary: This study utilized a noninvasive optical imaging tool to monitor the growth and therapeutic responses of multicellular tumor spheroids (MCTs) in vivo, evaluating the potential applications of three FDA-approved drugs for ovarian cancer therapy.
IEEE TRANSACTIONS ON BIOMEDICAL ENGINEERING
(2023)
Article
Automation & Control Systems
Qing-Hao Zhang, Jun-Guo Lu
Summary: This paper considers the admissibility and robust stabilization issues of fractional-order singular systems with polytopic uncertainties. Novel admissibility conditions for nominal fractional-order singular systems are proposed. Robust admissibility conditions for fractional-order singular systems with polytopic uncertainties are given based on the admissibility conditions for nominal fractional-order singular systems. Methods of designing static output feedback controllers that make the uncertain fractional-order singular systems robustly admissible are obtained. The results are illustrated with three examples.
ASIAN JOURNAL OF CONTROL
(2023)
Article
Computer Science, Theory & Methods
Qing-Hao Zhang, Jun-Guo Lu
Summary: This paper investigates the admissibility and robust stabilization of fractional-order singular discrete systems with interval uncertainties. The authors derive novel admissibility conditions for nominal fractional-order singular discrete systems and propose a more tractable condition for the controller design. They also address the state feedback controller synthesis and demonstrate the efficiency of the proposed method through numerical simulation examples.
INTERNATIONAL JOURNAL OF GENERAL SYSTEMS
(2023)
Article
Chemistry, Multidisciplinary
Meng Wu, Rui Zhang, Chen Li, Xue Sun, Guanjie Chen, Lidan Guo, Kun Zheng, Xiangnan Sun
Summary: The scarcity and cost of Pt-based electrocatalysts greatly hinder the wide production of green hydrogen, which is a promising clean energy source. In this study, a novel cobalt phosphide-based Ru single-atom electrocatalyst was developed, showing superior hydrogen evolution reaction (HER) performance compared to commercial Pt. The atomically dispersed Ru atoms induced a strong metal-support interaction (SMSI), which could be tuned by temperature. This study provides a promising strategy for tuning the SMSI effect in the development of highly efficient single-atom catalysts.
MATERIALS CHEMISTRY FRONTIERS
(2023)
Review
Chemistry, Physical
Ke Meng, Lidan Guo, Xiangnan Sun
Summary: The advent of spintronics has revolutionized data storage, processing, and sensing applications. Organic semiconductors (OSCs) have emerged as promising materials for advanced spintronic applications due to their long spin relaxation times and abundant spin-dependent properties. Efforts have been made to achieve effective spin polarization in OSCs, involving novel materials systems, spin-dependent theories, and device fabrication technologies. This review focuses on recent advances in external spin injection and organic property-induced spin polarization, and discusses the challenges and prospects in achieving dynamic spin generation in OSCs.
NANOSCALE HORIZONS
(2023)
Article
Engineering, Biomedical
Qing Zhang, Jing Zhang, Jiajun Yuan, Huajie Huang, Yuhang Zhang, Baoqin Zhang, Gaomei Lv, Shuzhu Lin, Na Wang, Xin Liu, Mingyu Tang, Yahua Wang, Hui Ma, Lu Liu, Shuhua Yuan, Hongyuan Zhou, Jian Zhao, Yongfu Li, Yong Yin, Liebin Zhao, Guoxing Wang, Yong Lian
Summary: By developing the first open-access paediatric respiratory sound database, SPRSound, and using a custom-made sound label annotation software, SoundAnn, we established a team of 11 experienced paediatric physicians to provide accurate labels for the dataset. Through investigating different feature extraction methods and machine learning classifiers, we achieved good classification performance at the event level and record level.
IEEE TRANSACTIONS ON BIOMEDICAL CIRCUITS AND SYSTEMS
(2022)
Article
Materials Science, Multidisciplinary
Bo Zhang, Congwu Ge, Cong Xie, Kaiwen Lin, Wei Yang, Bingyong Liu, Xike Gao, Yinhua Zhou, Qing Zhang
Summary: A new building block TTPY has been synthesized for pi-conjugated polymers, which can form resonance-assisted hydrogen bonds (RAHBs) and weak intramolecular noncovalent interactions. The X-ray diffraction analysis revealed a rigid co-planar structure, extended pi-conjugated and a tight lamella arrangement in the solid state. Two conjugated polymers based on TTPY exhibited high field-effect mobility and power conversion efficiency in field-effect transistors and polymer solar cells, respectively.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
