Review
Chemistry, Multidisciplinary
Liyuan Xiao, Zhenlu Wang, Jingqi Guan
Summary: This paper provides a detailed review of the topological structure design and synthesis methods of covalent organic frameworks (COFs), and analyzes their design principles. It also summarizes the applications of COFs and their derivatives in the field of electrocatalysis, and proposes optimization strategies. Finally, it explores the application prospects and challenges of COFs and their derivatives in electrocatalysis, providing guidance for future research.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Review
Green & Sustainable Science & Technology
Junhua You, Yao Zhao, Lu Wang, Wanting Bao
Summary: Covalent Organic Frameworks (COFs) are crystalline covalent polymers with high surface area and stable porosity, showing great potential for functionalization. Researchers are highly interested in novel and advanced COF materials for their wide range of useful applications. The use of COFs in photocatalytic applications is rapidly developing, offering an exciting avenue for scientific contributions in the field.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Chemistry, Physical
Ahmed M. Elewa, Mohamed Hammad Elsayed, Ahmed F. M. El-Mahdy, Chih-Li Chang, Li-Yu Ting, Wei-Cheng Lin, Chia-Yeh Lu, Ho-Hsiu Chou
Summary: This study describes a series of discontinuously conjugated COP photocatalysts based on TP, with different types of linkers tuning their photophysical, morphological, and photocatalytic properties. DPBT-TP shows a higher HER compared to other polymer photocatalysts, with tube-like polymer photocatalysts exhibiting better HER rates. This research provides a new material design strategy for achieving efficient visible-light-driven hydrogen evolution with polymer photocatalysts.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Review
Materials Science, Multidisciplinary
Xiao-Tong Wang, Xiao-Feng Lin, Ding-Shan Yu
Summary: Metal-containing covalent organic frameworks (MCOFs) with abundant single-atom metal sites can effectively respond to various vital reactions. The advent of MCOFs provides a platform for the establishment of model catalysts with highly repetitive structure and design flexibility to develop highly selective and active photo/electrocatalysts.
Article
Chemistry, Physical
Ce Song, Teng Yan, Xiaoxia Cui, Hao Chen, Ranfeng Ye, Xiaohu Zhang
Summary: Covalent organic frameworks (COFs) have been used as novel materials in photocatalytic technology for green energy and chemicals production. This study focuses on exploring efficient and stable COFs for photocatalytic synthesis of aromatic ethers and amines. The researchers constructed olefin-linked COFs modified with or without -F/-OCH3 groups, and embedded Ni active sites in the frameworks to achieve highly efficient and repeatable photo-catalytic reactions. The investigation revealed that the -F group modification greatly improved photogenerated carriers separation efficiency and demonstrated excellent substrate compatibility.
APPLIED CATALYSIS A-GENERAL
(2023)
Article
Chemistry, Physical
Qihong Yue, Guoqing Li, Ping Fu, Biao Meng, Fangpei Ma, Yu Zhou, Jun Wang
Summary: Photocatalytic hydrogen production from seawater is enhanced by using beta-ketoenamine-linked covalent organic frameworks (COFs) as catalysts under visible-light irradiation. Among the constructed COFs, the one with a high density of beta-ketoenamine units exhibits the highest photocatalytic H2 evolution rate in seawater, about 1.66 times higher than in pure water. The beta-ketoenamine units allow in-situ polarization of the COF framework, resulting in increased dielectric constant and enhanced charge separation and transfer for promoting H2 photoproduction in seawater.
Article
Chemistry, Multidisciplinary
Zheng Lin, Shujing Liu, Weijun Weng, Changchun Wang, Jia Guo
Summary: This study presents a photoisomerization-driven strategy for the design of covalent organic frameworks (COFs) by introducing electron-withdrawing benzothiadiazole, aiming to break the excited-state symmetry and enhance the photochemical reactivity of COFs. The ultrafast excited-state intramolecular proton transfer (ESIPT) is utilized to generate partially enolized COF isomers, leading to symmetry-breaking and enhanced charge separation and long-range electron transfer through the hybrid linkages. Asymmetric COFs show better photocatalytic performance than symmetric ones in ESIPT-induced photoisomerization.
Article
Chemistry, Physical
Yuqin Dou, Aijian Wang, Long Zhao, Xin Yang, Qi Wang, M. Shire Sudi, Weihua Zhu, Danhong Shang
Summary: In this study, a nitrogen-rich azo-bridged metallated porphyrin porous organic polymer (CoTAPP-CoTNPP) was synthesized and used to improve the activity of the hydrogen evolution reaction (HER). The incorporation of cobalt porphyrins and azo groups enhanced the charge transfer efficiency and porous frameworks, leading to enhanced HER performance. Structural and electrochemical measurements were conducted to evaluate the origins of the excellent HER performance.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Jalal Azadmanjiri, Pradip Kumar Roy, Lukas Dekanovsky, Zdenek Sofer
Summary: 2D carbides and nitrides of transition metals (MXenes) have promising properties for energy storage and conversion applications. However, the surface modification of MXenes is necessary to enhance their performance. This study investigates the conjugation effect of S, Se, and Te chalcogen elements on a few-layered Ti3C2Tx MXene for PEC photodetector, HER, and vapor sensor applications. Results show that Te-decorated MXene composite performs the best in PEC photodetector and vapor sensing, while Se-decorated MXene has a slightly lower potential value in HER application. S-decorated MXene shows the lowest performance among the three samples.
Review
Chemistry, Inorganic & Nuclear
Wei -Ting Chung, Islam M. A. Mekhemer, Mohamed Gamal Mohamed, Ahmed M. Elewa, Ahmed F. M. EL-Mahdy, Ho-Hsiu Chou, Shiao-Wei Kuo, Kevin C. -W. Wu
Summary: In recent years, both MOFs and COFs, known for their specific surface area, tunable porosity, and structural versatility, have been widely used in catalysis. Among these applications, catalytic hydrogen production processes have received significant attention as an alternative energy source to fossil fuels and a solution to global warming. This review provides an overview of the recent advancements and applications of MOFs/COFs-based catalysts for hydrogen production, including steam reforming, dry reforming, electrocatalytic water splitting, photocatalytic water splitting, and photo-electrocatalytic water splitting. The design of MOF/COF-based catalysts, as well as the opportunities and challenges in their use for hydrogen production, are also discussed.
COORDINATION CHEMISTRY REVIEWS
(2023)
Article
Crystallography
Jialong Song, Li Liao, Zerong Zhang, Yusran Yusran, Rui Wang, Jing Fang, Yaozu Liu, Yu Hou, Yujie Wang, Qianrong Fang
Summary: Covalent organic frameworks (COFs) are a new class of porous crystalline polymers that have been used as excellent supports for metal nanoparticles (MNPs). In this research, two novel ultra-microporous COFs, JUC-624 and JUC-625, were synthesized and used for the confined growth of ultrafine Co nanoparticles (CoNPs) with high loading. CoNPs@COFs exhibited excellent electrocatalytic performance for the hydrogen evolution reaction (HER) in an alkaline environment, with high stability and low onset overpotential.
Article
Chemistry, Multidisciplinary
Xiaolin Liu, Xiya Yang, Xu Ding, Hailong Wang, Wei Cao, Yucheng Jin, Baoqiu Yu, Jianzhuang Jiang
Summary: Covalent organic frameworks (COFs) are promising materials for photocatalytic hydrogen evolution reaction (HER) due to their tunable chemical structures. In this study, three COFs catalysts were investigated and the introduction of ascorbic acid was found to greatly improve their photocatalytic performance for HER.
CHINESE CHEMICAL LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Shuailong Yang, Ziao Chen, Lei Zou, Rong Cao
Summary: This study reports a novel linkage conversion strategy for the preparation of crystalline thiadiazole-linked covalent organic frameworks (COFs) with excellent stability. The prepared COFs maintain both porosity and crystallinity, while enhancing chemical stability. Compared to N-acylhydrazone-linked COFs, thiadiazole-linked COFs are more favorable for lowering exciton binding energy and promoting π-electron delocalization.
Article
Chemistry, Physical
Weiwen Wang, Lu Zhang, Chen Gao, Huang Zhu, Xing Yang, Chong Cheng, Xikui Liu, Shuang Li
Summary: In this study, a stable Mo-based catalyst was fabricated by pyrolysis of Mo, Ni adsorbed two-dimensional covalent organic framework (COF). The derived catalyst, Mo2C-MoNi4@NC, showed excellent HER activity and remarkable stability due to the protective effect of the nitrogen-doped graphene shell layer.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Jin Zhang, Yuping Cao, Wei Liu, Ting Cao, Jing Qian, Jiemin Wang, Xiaojun Yao, Anam Iqbal, Wenwu Qin
Summary: The simultaneous presence of triazine and ketone acceptors in covalent organic frameworks has been found to enhance electron-hole separation efficiency and improve photocatalytic hydrogen production. COFs with two acceptors showed the highest hydrogen production rate. A single phenyl group as a bridging unit was more favorable for the catalytic reaction, indicating the importance of distance between acceptors in COF design.
Article
Chemistry, Applied
Leping Chen, Yanfen Wang, Tingyu Shi, Tiantian Ma, Yang Li, Huayu Qiu, Shouchun Yin, Meier Gu
Summary: This study successfully overcame the limitations of the heavy atom effect by introducing iodine atoms and innovatively enhancing the structure while weakening stacking behavior, achieving high efficiency and precision in photodynamic therapy and photothermal therapy.
Article
Chemistry, Applied
Bingpeng Guo, Honghan Sa, Peng Zhang, Guiwen Hao, Mengyu Li, Qingqing Jiang, Baoying Li, Wei Shu, Changxiang Shao
Summary: The design of ratiometric fluorescence probes with large Stokes shift is of great significance in detecting and imaging target substances in complex organisms. In this study, a novel fluorophore with a large Stokes shift was easily obtained, and a fluorescence probe based on it demonstrated rapid response, high selectivity, and sensitivity towards peroxynitrite. The probe also showed excellent biocompatibility and remarkable mitochondrial targeting ability, making it suitable for proportional imaging of peroxynitrite in living cells and zebrafish.
Review
Chemistry, Applied
Haidong Huang, Xiaohui Wang, Xinyang Li, Yichen Li, Guojin Liu, Lan Zhou, Jianzhong Shao
Summary: This article introduces the application of responsive photonic crystals in anti-counterfeiting technology, with a focus on the preparation principle, classification, and preparation methods.
Article
Chemistry, Applied
Yunpeng Wang, Tao Zhao, Xiaoye Bi, Chencheng Lv
Summary: In this study, three novel carbene dyes were designed to achieve environmentally friendly dyeing processes. The dyes formed covalent bonds with fibers and exhibited good dyeing performance and high color fastness. These findings highlight the potential of the novel carbene dyes in promoting green production in the textile industry.
Review
Chemistry, Applied
Yizhe Yan, Xiaopei Zhu, Jia-Xin Cao, Yuan He, Shaoqing Li, Jian-Yong Wang
Summary: In this paper, 1,3,5-triazine dyes were successfully synthesized and their photophysical properties were studied. Two probes were selected for further investigation, showing promising applications in various fields.
Article
Chemistry, Applied
Xin Hu, Tongsheng Huang, Lihua Chen, Weifeng Zhu, Fengjie Deng, Xiancai Li, Jianwen Tian, Meiying Liu, Xiaoyong Zhang, Yen Wei
Summary: This study presents the synthesis of fluorescent cyclomatrix polyphosphazene spheres with aggregation-induced emission (AIE) feature and biodegradable potential for controlled drug delivery. The resulting micelles exhibit high water dispersibility, desirable fluorescence performance, and high drug loading capacity. They can effectively release the encapsulated drug in physiological solution and show excellent biological imaging ability and cytotoxicity against cancer cells.
Article
Chemistry, Applied
Yanzhu Liu, Yanghui Lei, Dongyan Li, Guangkui Li, Dongping Li, Yongxiu Li
Summary: In this study, luminescent lanthanide nanoparticles were synthesized as a dual emission turn-off probe for detecting 2,6-pyridinedicarboxylic acid (DPA) in water. The nanoparticles showed good dispersion and water stability, and achieved low detection limits for DPA. They also exhibited high recoveries in various samples.
Article
Chemistry, Applied
Jung Jae Do, Jong Ryeol Kwon, Donghan Kim, Jae Woong Jung
Summary: This study presents a defect passivation approach using coumarin dye as a multi-functional passivating agent of perovskite films to boost power conversion efficiency and operating stability of PSCs. The incorporation of coumarin dye improves the film morphology, enhances carrier extraction/transport, and suppresses trap-assisted recombination in the perovskite films. The optimized device demonstrates impressive reliability and practical applicability, maintaining over 90% of its initial PCE after being exposed to continuous indoor lighting irradiation for 2000 hours.
Article
Chemistry, Applied
Gang Wang, Yu-Chang Wang, Jing Lu, Wen-Fu Yan, Juan Jin, Yuan-Peng Wang, Jia-Jia Zhang, Hui-Jie Zhang, Hao Dong, Xi-Guang Liu
Summary: A new Ni(II) compound with good solid-state fluorescence performance and stability was synthesized, and it showed outstanding detection properties for various substances in aqueous solutions. This compound has the potential to be a multifunctional sensor.
Article
Chemistry, Applied
Luyao Wei, Shenglong Shang, Yu Zheng, Jie Liu, Ping Zhu
Summary: This study developed a facile method to create high saturation and durable structural colors on cotton fabrics. The colors are regulated by adjusting the size of magnetic particles and can be conveniently printed on fabrics using photo masks on transparent films.
Article
Chemistry, Applied
Zhao Jiang, Qing Zhang, Zhaoyu Kong, Ruijie Qiao, Zichuan Liu, Linzhou Song, Senqiang Zhu, Rui Liu, Hongjun Zhu
Summary: Three heteroleptic Ir(III) complexes with different electron-donating aryl groups were synthesized and their optical properties were investigated. It was found that all three complexes exhibited aggregation-induced phosphorescence emission (AIPE) behaviors, and the relationship between the size of organic ligands and AIPE behaviors was characterized. Ir-PhCz showed the best imaging of latent fingerprints due to its green light emission and high quantum yield.
Article
Chemistry, Applied
Zhijun Ruan, Chunxia Fan, Xuanrong Wang, Dong Shao, Xiaodong Yang, Wentao He, Tao Xu, Junqi Lin, Zhengfang Tian
Summary: A novel thioketal-based probe has been designed for rapid and accurate detection of mercury (II) ions, showing different fluorescence characteristics in various states. The probe exhibits excellent selectivity and specificity, making it suitable for Hg2+ detection in water solutions.
Article
Chemistry, Applied
Jianjun Huang, Xuan Zhao, Daniel Escudero, Luc Van Meervelt, Dongbin Zheng, Yuyu Fang, Wim Dehaen
Summary: A series of BOAHY compounds were successfully synthesized and showed versatile applications as a platform for designing novel fluorescent probes, especially in selective recognition.
Article
Chemistry, Applied
Roman V. Larkovich, Victoria E. Shambalova, Savva A. Ponomarev, Alexander S. Aldoshin, Boris N. Tarasevich, Konstantin A. Lyssenko, Valentine G. Nenajdenko
Summary: An efficient synthetic protocol for the preparation of novel 1,7-difluorinated BODIPYs was elaborated. Their photophysical properties were studied and the effect of 2,6-substituents was evaluated using DFT calculations.
Article
Chemistry, Applied
Haneul Kim, Byungjin Koo
Summary: In this study, a lithium ion sensing methodology based on fluorinated naphthalene compounds using 19F NMR and UV-vis spectroscopy is reported. The binding of lithium ions to the compounds is confirmed by changes in chemical shifts and peak broadening. Additionally, the effect of different crown ether ring sizes on the binding ability is observed. This study provides a new method for lithium ion sensing using spectroscopy.