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Review
Multidisciplinary Sciences
Ke Tian Tan et al.
Summary: Chemical approaches play a crucial role in the design, synthesis, control and engineering of small molecules, polymers and networks, combining covalent bonds and non-covalent interactions to establish complex structures for specific functions. Covalent organic frameworks (COFs) are crystalline porous polymers that integrate organic units into highly ordered structures through polymerization using covalent bonds for primary order structures and non-covalent interactions for high order structures in a one-pot reaction system. This Primer provides a comprehensive overview of the field of COFs, covering chemistry, physics, materials and applications, aiming to present a concise yet complete picture of the field and addressing key fundamental issues with future directions in mind.
NATURE REVIEWS METHODS PRIMERS
(2023)
Article
Chemistry, Multidisciplinary
Zhi-Bei Zhou et al.
Summary: Amide-linked covalent organic frameworks (amide COFs) have great potential in practical applications due to their high stability and polyamide structures. However, their accessibility is limited. In this study, a new linkage conversion method using KHSO5 as an oxidant was developed to rapidly synthesize crystalline amide COFs under mild conditions. This approach is general, facile, efficient, and scalable, allowing for easy production of amide COFs from widely available imine-linked COFs.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Chemistry, Multidisciplinary
Shashini D. Diwakara et al.
Summary: This study successfully synthesized a novel COF called PyCOFamide, which has a pore size greater than 6 nm in diameter and shows permanent porosity and high crystallinity. The pore size of this COF is large enough to accommodate fluorescent proteins.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Materials Science, Multidisciplinary
Waleed Helweh et al.
Summary: Ordered organic materials and assemblies have the potential to be tailored for optoelectronic applications. This study investigates the exciton dynamics in a 2D COF, its macrocycle analogue, and nanotubes comprised of stacked macrocycles. The results provide insights into the excitonic processes and guide the design of future COF materials.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
Article
Chemistry, Multidisciplinary
Jie Feng et al.
Summary: The development of linkage chemistry in covalent organic frameworks (COFs) is crucial for creating stable and highly crystalline structures with diversified functionality. By synthesizing fused-ring-linked COFs, researchers have achieved a new level of complexity and controllability in linkage chemistry, opening up new possibilities for the construction of sophisticated COF structures with high controllability.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Chemistry, Multidisciplinary
Zhenjie Mu et al.
Summary: In this study, a series of COFs with different pore apertures were successfully constructed using designed building blocks, demonstrating their potential applications in enzyme separation and protection.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Multidisciplinary Sciences
Weiwei Zhang et al.
Summary: This study presents a general and scalable method to prepare robust, highly crystalline imine COFs, which greatly enhances crystallinity and porosity through a reconstruction route. This nanoconfinement-assisted reconstruction strategy is a step towards programming function in organic materials through atomistic structural control.
Review
Chemistry, Multidisciplinary
Xiyu Song et al.
Summary: Hydrogen-bonded organic frameworks (HOFs) are rapidly evolving into a novel and important class of porous materials with unique advantages, but their stability may be limited and require further development of chemically and thermally robust materials.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Chemistry, Multidisciplinary
Ha L. Nguyen et al.
Summary: We report a postsynthetic strategy and its implementation to make covalent organic frameworks with irreversible hydrazide linkages. The synthesis of three 2D and 3D hydrazine-linked frameworks and their partial oxidation were performed. The water uptake profiles of these frameworks were studied, leading to the discovery of one hydrazine-hydrazide linked COF suitable for water harvesting from air in arid conditions.
ACS CENTRAL SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Dongyang Zhu et al.
Summary: This study demonstrates that the degree of pore collapse in nanoporous materials COFs can be precisely controlled by using a mixture of high and low surface tension solvents. The study also reveals that pore collapse is an irreversible process, and solvent surface tension is the most important characteristic that governs pore collapse.
ACS MATERIALS LETTERS
(2022)
Article
Materials Science, Multidisciplinary
Lars Grunenberg et al.
Summary: In this study, a convenient protocol for topochemical linkage reconstruction of urea-linked covalent organic frameworks is reported, providing a new approach to resolve the trade-off between crystallinity and stability in keto-enamine linked COFs.
Article
Chemistry, Multidisciplinary
Cosima Staehler et al.
Summary: The incorporation of molecular machines into porous framework structures has the potential to enhance various functions such as nano actuation and molecular transport. In this study, a light-driven molecular motor was synthesized and integrated into polymers and covalent organic frameworks (COF). The structural and dynamic properties of the resulting solids were analyzed using spectroscopic, diffraction, and theoretical methods. A crystalline 2D COF with stacked hexagonal layers containing 20 mol% molecular motors was successfully synthesized. The COF exhibited high pore volume and surface area. The supramolecular assembly and motor dynamics of the COF layers were also investigated. This research provides important insights for the analysis, design, and synthesis of motorized porous framework materials.
Article
Chemistry, Multidisciplinary
Leisan Gilmanova et al.
Summary: The synthesis of chemically stable two-dimensional imine covalent organic frameworks DUT-175 and DUT-176 has yielded structures with remarkable porosity and stability, making them ideal for indoor humidity control applications. Their complex conjugated pi system allows for reversible pH-dependent protonation and charge transfer, while the water vapor adsorption isotherms exhibit a sigmoidal shape with a steep adsorption step, confirming their suitability for humidity control.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Chemistry, Multidisciplinary
Lars Grunenberg et al.
Summary: Covalent organic frameworks with amine linkages can be directly accessed using a novel synthetic strategy, enabling further postsynthetic functionalization for increased hydrolytic stability and potential use as heterogeneous catalysts.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Multidisciplinary Sciences
Nikita Hanikel et al.
Summary: By conducting single-crystal x-ray diffraction experiments and density functional theory calculations, we deciphered the water-filling mechanism in the state-of-the-art water-harvesting metal-organic framework MOF-303. The evolution of water structures led us to modify the pores and precisely modulate the binding strength of water molecules, resulting in higher water productivity and tunability of regeneration temperature and enthalpy without compromising capacity and stability.
Article
Multidisciplinary Sciences
Ke Tian Tan et al.
Summary: Research on water confinement in small hydrophobic pores remains scarce because of a preconception that small hydrophobic pores repulse water molecules. Here, the authors demonstrate water confinement across hydrophobic microporous channels in crystalline covalent organic frameworks, achieving full occupation of pores by water via synergistic nucleation and capillary condensation, as well as quick water exchange at low pressures.
NATURE COMMUNICATIONS
(2021)
Article
Chemistry, Multidisciplinary
Sebastian T. Emmerling et al.
Summary: Covalent organic frameworks (COFs) with a pore size beyond 5 nm are rare in this field. By adjusting interlayer interactions, different stacking modes and effective pore sizes can be achieved, leading to increased structural control and stability in large-pore COFs.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Chemistry, Multidisciplinary
Shan Jiang et al.
Summary: In this study, COFs with water detection and adsorption properties were constructed and demonstrated high efficiency in water sensing and high water uptake capacity, showing promising prospects for future applications.
MATERIALS CHEMISTRY FRONTIERS
(2021)
Article
Chemistry, Multidisciplinary
Ha L. Nguyen et al.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2020)
Article
Chemistry, Multidisciplinary
Wentao Xu et al.
ACS CENTRAL SCIENCE
(2020)
Article
Chemistry, Multidisciplinary
Alexander M. Puetz et al.
Review
Materials Science, Multidisciplinary
Xingyi Zhou et al.
ACS MATERIALS LETTERS
(2020)
Review
Chemistry, Multidisciplinary
Yearin Byun et al.
CHEMISTRY-A EUROPEAN JOURNAL
(2019)
Article
Chemistry, Multidisciplinary
Nikita Hanikel et al.
ACS CENTRAL SCIENCE
(2019)
Article
Chemistry, Multidisciplinary
Maria S. Lohse et al.
ADVANCED FUNCTIONAL MATERIALS
(2018)
Review
Chemistry, Multidisciplinary
Markus J. Kalmutzki et al.
ADVANCED MATERIALS
(2018)
Article
Chemistry, Multidisciplinary
Suvendu Karak et al.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2017)
Article
Chemistry, Multidisciplinary
F. Haase et al.
MATERIALS CHEMISTRY FRONTIERS
(2017)
Article
Chemistry, Multidisciplinary
Peter J. Waller et al.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2016)
Article
Chemistry, Physical
Linus Stegbauer et al.
CHEMISTRY OF MATERIALS
(2015)
Article
Chemistry, Physical
Bishnu P. Biswal et al.
JOURNAL OF MATERIALS CHEMISTRY A
(2015)
Review
Chemistry, Multidisciplinary
Kevin S. Williamson et al.
Article
Chemistry, Multidisciplinary
Hiroyasu Furukawa et al.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2014)
Article
Chemistry, Multidisciplinary
J Kraïem et al.
COMPTES RENDUS CHIMIE
(2004)
