Article
Engineering, Environmental
Xiu Wang, Wei Xu, Wei-Rong Cui
Summary: Uranium recovery is crucial for environmental management, maximizing uranium resource utilization, and reducing the pressure on nuclear fuel supply. However, the current adsorbents have limited practical application due to poor selectivity in highly acidic conditions. This study presents a novel uranium recovery strategy using metal-free cyclization-modulated conjugated microporous polymers (CMPs) with excellent selectivity and removal efficiency.
JOURNAL OF HAZARDOUS MATERIALS
(2024)
Article
Chemistry, Applied
Xing-Hao Du, Zhiyong Jiang, Zhipeng Liu, Chao Xu
Summary: Conjugated porous polymers (CPPs) are a new family of functional porous materials with tuneable porosities and molecular architectures, showing great potentials in adsorption, light harvesting, and catalysis applications. This study describes the incorporation of strong visible-light absorbing BODIPY molecules into the skeleton of CPPs, resulting in CPPs with integrated properties of high surface area, hierarchical porous structures, and strong visible-light absorption. The obtained CPPs demonstrated relatively high adsorption capacity and high photocatalytic degradation efficiency towards organic dyes, with mechanism studies revealing the generation of singlet oxygen species as the main driving force for the dye degradation.
MICROPOROUS AND MESOPOROUS MATERIALS
(2022)
Article
Environmental Sciences
Zeeshan Ajmal, Mahmood ul Haq, Yassine Naciri, Ridha Djellabi, Noor Hassan, Shahid Zamanh, Adil Murtaza, Anuj Kumarj, Abdullah G. Al-Sehemi, Hamed Algarni, Omar A. Al-Hartomy, R. Dong, Asif Hayat, Abdul Qadeer
Summary: According to a survey by the World Health Organization (WHO), air pollution has become the leading cause of death for 7 million people worldwide. Strategies are being implemented to reduce pollutant emissions and promote the use of sustainable green technologies. Photocatalysis technology, especially the combination of conjugated polymers (CPs) and inorganic semiconductors, has shown promise in removing air pollutants. This review evaluates the contribution and potential of CPs as novel photocatalysts in reducing CO2, NOX, and VOCs, and highlights the synergistic effects achieved when CPs are combined with inorganic semiconductors.
Article
Chemistry, Physical
Boxuan Yu, Lei Zhang, Gang Ye, Qingzhi Liu, Jiongli Li, Xudong Wang, Jing Chen, Shengming Xu, Shengqian Ma
Summary: This study reports a novel de novo synthesis of bifunctional conjugated microporous polymers with coordination behavior to uranium. The introduction of ortho-substituted amino functionalities enhances the affinity to uranyl ions and increases the adsorption capacity by almost 70%. XPS analysis and DFT calculation suggest a dominant role of oxime ligands in coordination with uranyl ions and show the synergistic engagement of amino functionalities in promoting coordination with uranyl ions.
Article
Chemistry, Inorganic & Nuclear
Chunfu Liu, Chenyu Zhu, Han Wang, Shenao Xie, Junyang Zhou, Hongjun Fang
Summary: Co-doped metal organic frameworks (MOFs) were fabricated using a facile method and applied for the removal of tetracycline, congo red, methylene blue, and rhodamine B through adsorption and photocatalysis. The assembled MOFs composite exhibited enhanced adsorption and photocatalysis performance, with nearly 100% removal of tetracycline achieved within 12 minutes of solar-light irradiation. The obtained rate constant was significantly higher than other materials, demonstrating the potential of Co-MIL-10 as an efficient catalyst for pollutant degradation.
JOURNAL OF SOLID STATE CHEMISTRY
(2022)
Article
Nanoscience & Nanotechnology
Sizhe Li, Jie Yin, Hao Zhang, Kai A. I. Zhang
Summary: The oxidative formation of high value compounds using heterogeneous polymeric photocatalysts has become a valuable tool in catalysis. However, controlling the interaction between the active sites and oxygen molecules is challenging due to the large polymer backbone structure. In this study, a triazine-containing conjugated microporous polymer (CMP) with dual active sites was designed for molecular oxygen activation. Introducing fluorine atoms on the CMP backbone enhanced the adsorption and electron transfer of oxygen, efficiently generating superoxide radicals and singlet oxygen as active oxygen species. The photocatalytic activity, selectivity, and reusability of the CMP were demonstrated by the formation of benzothiazoles.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Ruidong Gao, Guang Zhang, Fanli Lu, Long Chen, Yang Li
Summary: In this study, two new pyrrole-based CMPs with large specific surface areas and good stabilities were successfully prepared by one-step oxidative self-polycondensation. Both CMPs exhibited high catalytic activity towards Knoevenagel condensation reaction, attributed to the inherent pore channels, high specific surface areas, and abundant nitrogen sites within CMPs. Additionally, both CMPs displayed excellent recyclability with negligible degradation after 10 cycles, providing new possibilities for designing novel nitrogen-rich high-performance heterogeneous catalysts.
FRONTIERS IN CHEMISTRY
(2021)
Article
Polymer Science
Fanwei Kong, Junkang Ge, Zihao Zhu, Chunxia Chen, Jinsong Peng, Xiaobai Li, Bin Li, Hongwei Ma
Summary: A CMP with a high specific surface area and hierarchical pore structure (CPOP) was constructed and a CMP-loaded wood aerogel (CPOP/wood aerogel) was prepared for wastewater treatment. The obtained CPOP/wood aerogel is highly biocompatible and easy to recycle. CPOP exhibits broad visible light absorption and promising photocatalytic properties.
Article
Chemistry, Physical
Chang-An Wang, Jian-Ping Zhang, Kun Nie, Yan-Wei Li, Qun Li, Guo-Zheng Jiao, Jian-Guo Chang, Yin-Feng Han
Summary: Conjugated microporous polymers (CMPs) are promising alternatives to traditional inorganic semiconductors for photocatalysis due to their superior properties. Tetrathienoanthracene-based TTA-CMP shows excellent catalytic activity and reusability in various organic reactions, indicating its potential as an efficient solid organocatalyst.
CATALYSIS SCIENCE & TECHNOLOGY
(2021)
Article
Engineering, Environmental
Liujun Yang, Yuxiang Wang, Junwei Yuan, Guan Wang, Qiang Cao, Heng Fei, Miaomiao Li, Junxia Shao, Hua Li, Jianmei Lu
Summary: In this paper, a covalent-integrated strategy is adopted to construct a MOFs@COFs Z-scheme heterojunction composite material consisting of Ti-MOFs and COFs. This material exhibits a broader visible light response range and higher adsorption and degradation performance, making it a promising photocatalytic material.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Nanoscience & Nanotechnology
Chen Hou, Lan Wang, Wei Zhang, Zhiqiang Zhu, Shiwei Lu, Fujun Zou, Chuanyi Wang
Summary: In this study, a novel heterojunction of oxygen vacancy-rich TiO2-x confined in the layer space of a synthetic montmorillonite-like iron silicate (TiO2-x/FeMMT) was developed to address the issue of unsatisfactory electron transfer in photocatalysis-Fenton synergistic reaction. The two-dimensional layered montmorillonite-like silicates in the heterojunction provided more active sites for the reaction and induced oxygen vacancies in TiO2-x through interfacial effects, enhancing the visible-light harvesting ability. The TiO2-x/FeMMT composites exhibited superior photocatalysis-Fenton performance for the degradation removal of phenol, dinotefuran (DIN), and sulfamethoxazole (SMX) under visible-light irradiation.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Engineering, Environmental
Jiaqi Yu, Hongsen Zhang, Qi Liu, Jing Yu, Jiahui Zhu, Rumin Li, Peili Liu, Ying Li, Jun Wang
Summary: A dual regulation strategy was proposed to prepare a high-performance uranium extraction material from seawater. The AO-CS/CdS-porous few-layer g-C3N4 nanofiber membrane (SN-ACP) exhibited both adsorption and photocatalytic properties. Additionally, SN-ACP showed good antibacterial properties and improved uranium extraction performance.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Nanoscience & Nanotechnology
Siyu Luo, Qianqian Yan, Shenglin Wang, Hui Hu, Songtao Xiao, Xiaofang Su, Huanjun Xu, Yanan Gao
Summary: Radioactive iodine from nuclear waste poses a huge threat to public safety and environmental pollution. In this study, three novel conjugated microporous polymers were designed and synthesized as highly effective iodine adsorbents. The CMPs showed excellent iodine adsorption capacity even after multiple cycles, and they also demonstrated good adsorption performance in an iodine solution.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Nanoscience & Nanotechnology
Siyu Luo, Qianqian Yan, Shenglin Wang, Hui Hu, Songtao Xiao, Xiaofang Su, Huanjun Xu, Yanan Gao
Summary: Radioactive iodine from nuclear waste poses a threat to public safety and the environment, necessitating the development of novel adsorbents for effective iodine capture. In this study, three novel conjugated microporous polymers were designed and synthesized, demonstrating excellent iodine adsorption capacity. The findings open up new possibilities for designing novel CMPs for environmental applications.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Review
Engineering, Environmental
Lei Huang, Xuanjie Huang, Jia Yan, Yonghui Liu, Hao Jiang, Hongguo Zhang, Jinfeng Tang, Qiang Liu
Summary: This paper discusses the advantages of multi-functional perovskites in simultaneously applying adsorption and photocatalytic removal of water pollutants, as well as the preparation methods, influencing factors, and strategies for performance improvement. It explores the removal mechanisms and behaviors of water pollutants using perovskites, providing insights for designing them as efficient adsorbents and catalysts.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Ruofan Li, Guolong Xing, Hui Li, Shen Li, Long Chen
Summary: Covalent organic frameworks (COFs) are crystalline porous organic materials with variable structures and fascinating properties. Iodine doping is an effective method to enhance the electrical conductivity of COFs. In this study, a novel 3D imine COF with lvt topology was synthesized, and upon doping with iodine, its electrical conductivity was significantly enhanced over 6 orders of magnitude compared with the pristine COF.
CHINESE CHEMICAL LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Pengna Shang, Xiaoli Yan, Yang Li, Junji Liu, Guang Zhang, Long Chen
Summary: Metal-free heterogeneous photocatalysts offer a green and cost-efficient solution for organic synthesis. Covalent organic frameworks (COFs) show great potential as photocatalysts due to their high porosity, insolubility, and tailored functions. However, COF-based catalysts have only been used in a limited number of reactions. In this study, nitrogen-rich COFs (N-COFs) with comparable porous structures were developed as photocatalysts, successfully mediating the borylation of aryl iodides with a wide range of substrates. Among them, 6N-COF exhibited excellent photocatalytic efficiency and recyclability, providing a new approach for the construction of efficient heterogeneous photocatalysts in the borylation of aryl halides. (c) 2023 Published by Elsevier B.V. on behalf of Chinese Chemical Society and Institute of Materia Medica, Chinese Academy of Medical Sciences.
CHINESE CHEMICAL LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Yusen Li, Xi Su, Wenhao Zheng, Jia-Jia Zheng, Linshuo Guo, Mischa Bonn, Xingfa Gao, Hai I. Wang, Long Chen
Summary: The targeted synthesis of kagome topologic 2D covalent organic frameworks (kgm Naph-COFs) remains challenging due to the dependence on building units and synthetic conditions. In this study, two isomeric Naph-COFs with different pore structures were successfully synthesized using elaborately designed monomers based on naphthalene core. The incorporation of C-60 into one of the isomeric COFs resulted in a stable C-60@m-Naph-COF composite with significantly higher photoconductivity compared to the pure m-Naph-COF.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Dan Chen, Weiben Chen, Yuting Wu, Lei Wang, Xiaojun Wu, Hangxun Xu, Long Chen
Summary: This study reports crystalline s-heptazine-based COFs (HEP-TAPT-COF and HEP-TAPB-COF) with separated redox centers for efficient H2O2 production. The spatially and orderly separated active sites in HEP-COFs promote charge separation and enhance photocatalytic H2O2 production. Compared to HEP-TAPB-COF, HEP-TAPT-COF exhibits higher H2O2 production efficiency by integrating dual O-2 reduction centers of s-heptazine and triazine moieties. Consequently, HEP-TAPT-COF with dual O-2 reduction centers achieves a remarkable solar-to-chemical energy efficiency of 0.65% and a high apparent quantum efficiency of 15.35% at 420 nm, surpassing previously reported COF-based photocatalysts.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Polymer Science
Jingwen Zhang, Xiaoli Yan, Pei Chen, Dan Chen, Zongfan Yang, Jianhui Wang, Long Chen
Summary: Covalent organic frameworks (COFs) are of increasing interest due to their unique structures and desirable properties. However, heteroporous COFs are still underdeveloped due to limited precursor configurations. In this study, a new K-shaped building unit (BPTD) was ingeniously designed and used to construct a triangular dual microporous COF (BPTD-COF). The BPTD-COF displayed selective adsorption for cationic dyes with good reusability, thanks to its super micropore and appropriate aperture sizes.
MACROMOLECULAR RAPID COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Xi Su, Zhiye Zhong, Xiaoli Yan, Ting Zhang, Chuanzhe Wang, Yi-Xuan Wang, Gang Xu, Long Chen
Summary: We developed a nonplanar hexahydroxyl-functionalized Salphen ligand (6OH-Salphen) through a facile two-step synthesis and used it to construct layered 2D c-MOFs through in situ one pot synthesis based on the synergistic metal binding effect of the N2O2 pocket of Salphen. The Cu-Salphen-MOF exhibited periodically heterogeneous pore structures due to the C-2v symmetry of the ligand. With higher metal density and shorter in-plane metal-metal distance, Cu-Salphen-MOF showed excellent NO2 sensing performance with good sensitivity, selectivity, and reversibility. This work provides a new approach to directly construct 2D c-MOFs from nonplanar ligands, simplifying the synthesis process and offering new possibilities for preparing functional materials with different topologies.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Yunpeng Xu, Pingwei Cai, Kai Chen, Qingsong Chen, Zhenhai Wen, Long Chen
Summary: This paper proposes a hybrid acid/alkali all-COFs battery that combines a pyrene-4,5,9,10-tetraone based COF cathode with an anthraquinone based COF anode. The battery demonstrates high discharge capacity, energy density, and cyclic stability.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Pei Chen, Xi Su, Chuanzhe Wang, Guang Zhang, Ting Zhang, Gang Xu, Long Chen
Summary: The development of two-dimensional conjugated metal-organic frameworks (2D c-MOFs) with remarkable electrical properties has created a new platform for efficient energy storage, sensing, and electrocatalysis. However, the availability of suitable ligands is limited, especially for 2D c-MOFs with large pore apertures and high surface areas. In this study, two new 2D c-MOFs (HIOTP-M, M=Ni, Cu) are successfully synthesized using a large conjugated ligand HAOTP. Among the reported 2D c-MOFs, HIOTP-Ni exhibits the largest pore size of 3.3 nm and one of the highest surface areas (up to 1300 m(2) g(-1)). As a demonstration, HIOTP-Ni shows promising chemiresistive sensing properties towards 10 ppm NO2 gas with high selectivity (405%) and a rapid response (1.69 min). This work highlights the significant correlation between the pore aperture of 2D c-MOFs and their sensing performance.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Xiaoxiao Sun, Xiaoli Yan, Keming Song, Ting Zhang, Zongfan Yang, Xi Su, Weihua Chen, Long Chen
Summary: Two-dimensional conductive metal-organic frameworks (2D c-MOFs) with intrinsic electrical conductivity, high specific surface area, tunable chemical composition, and tailor-made properties are considered as promising electrode materials for energy storage and conversion. In this study, a novel pyrazine-based 2D c-MOF (TPQG-Cu-MOF) with an extended conjugated structure and abundant redox active sites was designed and synthesized. TPQG-Cu-MOF exhibited reversible specific capacity (150.2 mAh·g-1 at 20 mAh·g-1), good cycling stability (82.6% capacity retention after 500 cycles at 1 A·g-1), and excellent rate performance as the cathode material of a lithium-ion battery. In-depth ex-situ spectroscopic studies revealed the reversible redox activity of pyrazine units and CuO2 units during the Li+ insertion/extraction process. This study deepens the fundamental understanding of the structure-property relationship and paves the way for further development of efficient MOF-based energy storage devices.
CHINESE JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Guolong Xing, Jingjuan Liu, Yi Zhou, Shuai Fu, Jia-Jia Zheng, Xi Su, Xingfa Gao, Osamu Terasaki, Mischa Bonn, Hai I. Wang, Long Chen
Summary: Conductive metal-organic frameworks (c-MOFs) with excellent electrical conductivities and charge transport properties were synthesized using contorted hexabenzocoronene (c-HBC) derivatives as nonplanar and highly soluble ligands. Three c-MOFs with different geometries and packing modes were obtained, among which c-HBC-12O-Cu exhibited the highest intrinsic electrical conductivity and all c-HBC-based c-MOFs showed high charge carrier mobilities. This work provides a systematic and modular approach to enhance the structure and charge transport properties of c-MOFs using nonplanar and highly soluble ligands.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Xiaoyu Song, Chao Jin, Hongliang Chen, Shuaishuai Ding, Zhongyi Liu, Yang Li, Xiaoli Yan, Wenbo Mi, Long Chen, Wenping Hu
Summary: In this study, a facile method for fabricating phthalocyanine (Pc) based two-dimensional conductive metal-organic framework (MOF) films was presented. Spin valves with La0.67Sr0.33MnO3/PcM-Cu MOFs/Co vertical configuration were successfully constructed, showing high negative magnetoresistance (MR) up to -22% at 50 K. The exchange bias effect demonstrated at the PcM-Cu MOF/Co interface was beneficial for the MR behavior. This study provides new insights into developing high-performance organic spin valves through de novo molecular design.
Article
Chemistry, Multidisciplinary
Xiaoli Yan, Feixiang Wang, Xi Su, Junyu Ren, Meiling Qi, Pengli Bao, Weihua Chen, Chengxin Peng, Long Chen
Summary: A cathode material based on a 2D covalent organic framework (TPAD-COF) with regular open porous channels and excellent stability is developed. The TPAD-COF cathode shows high capacity and cycling stability. The NH and C=O groups in the aniline-fused quinonoids exhibit prominent redox activity. The TPAD-COF cathode can be potentially applied in aqueous proton batteries.
ADVANCED MATERIALS
(2023)
Review
Chemistry, Inorganic & Nuclear
Wenjin Li, Wenzhe Xiao, Qizhen Luo, Jipeng Yan, Guang Zhang, Long Chen, Jian Sun
Summary: This review provides a new perspective on the multifunctional roles of designable ionic liquids (ILs) in porous organic frameworks. It discusses the effects of ILs on promoting synthesis and modulating functions of the frameworks, as well as the roles of ILs in enhancing catalysis, energy storage, and gas adsorption. The review also presents an outlook on challenges and opportunities in the field of ILs with porous organic frameworks.
COORDINATION CHEMISTRY REVIEWS
(2023)
Article
Chemistry, Multidisciplinary
Jing Zhao, Ting Zhang, Junyu Ren, Ziqiang Zhao, Xi Su, Weihua Chen, Long Chen
Summary: We have synthesized a new 2D coordination polymer (Cu-TBC) by polymerizing a highly conjugated tribenzocoronene-type ligand (6OH-TBC) with Cu2+. This material shows excellent stability and performance as an electrode for a supercapacitor.
CHEMICAL COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Min Song, Jingjing Jia, Pingping Li, Jiahao Peng, Xinghan Pang, Meiling Qi, Yulong Xu, Long Chen, Lifeng Chi, Guang Lu
Summary: In this study, an anodic strategy based on ligand oxidation was developed for synthesizing oriented films of two-dimensional and three-dimensional conductive MOF materials on commonly used electrodes, with tunable thicknesses. This strategy allows for effective control over the crystallization of MOFs and the synthesis of films with specific structures and sizes, including hollow structures such as nanorods.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
