Article
Chemistry, Applied
Yu-Xuan Chen, Shuo Zhang, Yu-Jie Xue, Li-Ping Mo, Zhan-Hui Zhang
Summary: A simple azine-linked COF with high thermal and chemical stabilities was prepared using a deep eutectic solvent (DES) as a green media. The synthesized COF was employed as a heterogeneous ligand for immobilization of Pd-II. The obtained Pd-supported COF nanoparticles catalyst showed excellent recyclability, reusability, and retention of crystallinity in the Hirao reaction of aryl halides and dialkyl phosphites or diphenylphosphine oxide.
APPLIED ORGANOMETALLIC CHEMISTRY
(2022)
Article
Chemistry, Applied
Ahmed R. Abdellah, Abu-Bakr AAM. El-Adasy, Ahmed A. Atalla, Kamal I. Aly, Hani Nasser Abdelhamid
Summary: In this study, COFs synthesized via the solvothermal method were used as supports for in-situ growth of Pd NCs, resulting in catalysts with small particle sizes. The materials were characterized using various techniques, and the Pd NCs@COFs exhibited excellent catalytic performance and stability in C-C formation reactions.
MICROPOROUS AND MESOPOROUS MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Xiaofeng Li, Zhimin Jia, Jie Zhang, Yingdi Zou, Yingdan Zhang, Kewen Shu, Weijian Liu, Ning Liu, Yang Li, Lijian Ma
Summary: This study presents a novel strategy for synthesizing stable amino-functionalized COFs with benzodiimidazole linkage. The use of Bandrowski's base as a unique monomer provides construction sites for the material framework and amino active sites for functionality in COF synthesis, which is usually challenging to achieve. The resulting BBCOF exhibits improved crystallinity and stability due to the aromatic benzodiimidazole rings and large conjugated system. Furthermore, the enhanced conjugation degree enables efficient photocatalytic reduction of uranyl ions. This research is of great importance for the design and synthesis of functional COFs with a commendable trade-off among crystallinity, stability, and functionality.
Article
Nanoscience & Nanotechnology
Zainab Almansaf, Jiyun Hu, Federica Zanca, Hamid R. Shahsavari, Benjamin Kampmeyer, Miu Tsuji, Kartik Maity, Valerie Lomonte, Yumi Ha, Piero Mastrorilli, Stefano Todisco, Mourad Benamara, Rama Oktavian, Arsalan Mirjafari, Peyman Z. Moghadam, Ahmad R. Khosropour, Hudson Beyzavi
Summary: A new COF based on imine bonds with dual-pore structure and high crystallinity was successfully synthesized, and selectively metallated with Pt on the N donor in the larger pores. The metallated COF showed excellent performance as a recyclable heterogeneous photocatalyst for decarboxylative difluoroalkylation and oxidative cyclization reactions.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Review
Chemistry, Applied
Jay Soni, Ayushi Sethiya, Nusrat Sahiba, Shikha Agarwal
Summary: In recent decades, heterogeneous catalysis, especially metal-based graphene oxide (GO) catalysts, has emerged as a promising approach for sustainable synthesis due to their unique properties. This article discusses the catalytic efficiency of various metal-supported GO catalysts in different organic transformations, such as oxidation, reduction, and multicomponent reactions. It aims to summarize the uses of metal-supported GO in the preparation of diverse synthetic molecules and the recent advancements in GO metal composites as catalysts.
APPLIED ORGANOMETALLIC CHEMISTRY
(2021)
Article
Chemistry, Applied
Haoyue Han, Shangzhi Ding, Yanling Geng, Zhaoyu Qiao, Xuemei Li, Rongyu Wang, Xiqing Zhang, Wenhua Ji
Summary: In this study, a pyridine-functionalized covalent organic framework (Py-COF) was synthesized and used as a coating for solid-phase microextraction (SPME) method for the efficient determination of PFECAs in food. The method showed satisfactory sensitivity and accuracy, making it suitable for the analysis of trace PFECAs in food.
Article
Chemistry, Multidisciplinary
Yite Li, Lei Wang, Hao Liu, Yong Pan, Chaonan Li, Zhigang Xie, Xiabin Jing
Summary: The study developed a cascade catalyst triggered by glucose, which efficiently converts glucose into hydrogen peroxide to improve peroxidase activity and generate more toxic hydroxyl radicals against bacterial wound infections, enhancing the healing effects.
Article
Chemistry, Physical
Baiwei Ma, Fujia Hu, Xin Yang, Yongyu Huang, Xiubei Yang, Huijie Qiao, Zhuo Wang, Dehong Yang, Wenying Ai, Liwei Mi
Summary: Recently, crystalline covalent organic frameworks (COFs) have shown excellent performance in photocatalytic conversions due to their great photoelectric properties. Two new conjugated pyrene-based COFs, named PyDF-COF and PyBMT-COF, were successfully synthesized via condensation polymerization. These COFs exhibit highly selective aerobic hydroxylation of arylboronic acids with high yields and wide substrate universality. PyBMT-COF demonstrates a more efficient ability for this aerobic hydroxylation compared to PyDF-COF, which can be attributed to the electron-donating thiomethyl groups, resulting in enhanced distribution of the electron cloud and improved photoelectrochemical properties.
APPLIED CATALYSIS A-GENERAL
(2023)
Article
Chemistry, Physical
Paloma Garcia-Arroyo, Emiliano Martinez-Perinan, Jorge J. Cabrera-Trujillo, Elena Salagre, Enrique G. Michel, Jose Martinez, Encarnacion Lorenzo, Jose L. Segura
Summary: A novel porous and crystalline two-dimensional electrochemically active covalent organic framework (COF) has been developed as an efficient electrocatalyst for the oxygen reduction reaction (ORR). It does not require the addition of any metal or conductive supporting material and avoids any additional carbonization step. The enhanced crystallinity and porosity of the COF network play a vital role in its superior performance.
Review
Chemistry, Multidisciplinary
Hui Chen, Himanshu Sekhar Jena, Xiao Feng, Karen Leus, Pascal Van der Voort
Summary: This Review provides a comprehensive and systematic overview of the application of covalent organic frameworks (COFs) as photocatalysts for organic transformations. It covers the photophysical properties, characterization methods, general photocatalytic mechanism, advantages, and strategies to improve the efficiency of COF-based photocatalysts. It also analyzes advanced examples and discusses the challenges and prospects in the field.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Biochemistry & Molecular Biology
Guanying Shi, Zhenhua Dong
Summary: A hybrid catalyst, Pd@AEPOP, immobilized on an amide and ether functionalized porous organic polymer, has been reported to be an effective heterogeneous catalyst for the synthesis of diphenylethene derivatives via the Heck cross-coupling reaction of aryl iodides with styrene. Excellent yields can be achieved using a 0.8 mol% Pd catalyst loading under optimized reaction conditions. The Pd@AEPOP catalyst can also be applied for the Suzuki reaction and nitroarene reduction.
Article
Chemistry, Multidisciplinary
Yu-Xuan Chen, Mo Zhang, Shuai-Zheng Zhang, Zhi-Qiang Hao, Zhan-Hui Zhang
Summary: A layered covalent organic framework material based on an imine-linkage with high thermal and chemical stability was synthesized using a deep eutectic solvent as the green medium. The COF material was modified with catalytic copper, resulting in a crystalline and highly porous catalyst. This photocatalyst exhibited excellent photocatalytic performance in visible-light-driven coupling reactions and showed good recyclability.
Article
Chemistry, Multidisciplinary
P. Sarkar, A. Hazra Chowdhury, S. Biswas, A. Khan, S. M. Islam
Summary: The efficient synthesis of Pd(II)-based COF for photocatalytic fixation of CO2 to prepare oxazolidinone has been demonstrated. The material exhibits low bandgap energy and high photocatalytic activity, achieving a high turnover number under sunlight in catalytic cycles. The catalyst shows efficient reusability and minimal metal leaching during reaction cycles, providing a new environmentally friendly pathway for oxazolidinone synthesis.
MATERIALS TODAY CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Hassan Keypour, Jamal Kouhdareh, Rahman Karimi-Nami, Idris Karakaya, Molood Abdollahi-Moghadam, Khadijeh Rabiei, Sedigheh Alavinia
Summary: This study presents the development and application of an environmentally compatible and recyclable heterogeneous catalyst for C-C coupling reactions. The catalyst demonstrated excellent catalytic performance with high yields of up to 98%. The synthetic method showed advantages such as simple set-up, improved yields, short reaction times, non-toxic solvents, catalyst durability, and high turnover frequency.
Review
Chemistry, Physical
Zhuangfei Qian, Zi Jun Wang, Kai A. Zhang
Summary: This review summarizes the recent developments in Covalent triazine frameworks (CTFs) as a new class of visible light-active, metal-free, and polymer-based heterogeneous photocatalysts. It discusses various physical and chemical design strategies for morphology, band structure, charge separation, and transfer optimization that directly impact their photocatalytic efficiency, with emphasis on enhancing and maximizing the efficiency for specific applications.
CHEMISTRY OF MATERIALS
(2021)
