Pyrazine‐Functionalized Donor–Acceptor Covalent Organic Frameworks for Enhanced Photocatalytic H2 Evolution with High Proton Transport DOI
Fengdong Wang, Lijuan Yang, Xinxin Wang

et al.

Small, Journal Year: 2023, Volume and Issue: 19(23)

Published: March 8, 2023

The well-defined 2D or 3D structure of covalent organic frameworks (COFs) makes it have great potential in photoelectric conversion and ions conduction fields. Herein, a new donor-accepter (D-A) COF material, named PyPz-COF, constructed from electron donor 4,4',4″,4'″-(pyrene-1,3,6,8-tetrayl)tetraaniline accepter 4,4'-(pyrazine-2,5-diyl)dibenzaldehyde with an ordered stable π-conjugated is reported. Interestingly, the introduction pyrazine ring endows PyPz-COF distinct optical, electrochemical, charge-transfer properties, also brings plentiful CN groups that enrich proton by hydrogen bonds to enhance photocatalysis performance. Thus, exhibits significantly improved photocatalytic generation performance up 7542 µmol g-1 h-1 Pt as cocatalyst, clear contrast PyTp-COF without (1714 ). Moreover, abundant nitrogen sites 1D nanochannels enable as-prepared COFs immobilize H3 PO4 carriers through bond confinement. resulting material has impressive 8.10 × 10-2 S cm-1 at 353 K, 98% RH. This work will inspire design synthesis COF-based materials both efficient future.

Language: Английский

Recent Progress of Covalent Organic Frameworks Applied in Electrochemical Sensors DOI
Rui Xue,

Yin-Sheng Liu,

Sheng‐Li Huang

et al.

ACS Sensors, Journal Year: 2023, Volume and Issue: 8(6), P. 2124 - 2148

Published: June 5, 2023

As an emerging porous crystalline organic material, the covalent frameworks (COFs) are given more and attention in many fields, such as gas storage separation, catalysis, energy conversion, luminescent devices, drug delivery, pollutant adsorption removal, analysis detection due to their special advantages of high crystallinity, flexible designability, controllable porosities topologies, intrinsic chemical thermal stability. In recent years, COFs applied analytical chemistry, for instance, chromatography, solid-phase microextraction, colorimetric sensing, surface-enhanced Raman scattering electroanalytical chemistry. The decorated electrodes show performance detecting trace substances with remarkable selectivity sensitivity, heavy metal ions, glucose, hydrogen peroxide, drugs, antibiotics, explosives, phenolic compounds, pesticides, disease metabolites so on. This review mainly summarized application COF based electrochemical sensor according different target analytes.

Language: Английский

Citations

71
Structural Motifs in Covalent Organic Frameworks for Photocatalysis DOI

Liyang Qin,

Chengdi Ma,

Jian Zhang

et al.

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: March 10, 2024

Abstract Covalent organic frameworks (COFs) attract significant attention due to their ordered, crystalline, porous, metal‐free, and predictable structures. These unique characteristics offer great opportunities for the diffusion transmission of photogenerated charges during photocatalysis. Currently, a considerable number COFs are used as metal‐free semiconductor photocatalysts. This review aims understand relationships between structure photocatalysis performance provides in‐depth insight into synthetic strategy improve performance. Subsequently, focuses on structural motif in sustainable photocatalytic hydrogen evolution, carbon dioxide reduction, peroxide generation, compound transformations. Last, conjunction with progress achieved challenges yet be overcome, candid discussion is undertaken regarding field COF photocatalysis, accompanied by presentation potential research avenues future directions. seeks provide readers comprehensive understanding pivotal role robust guidance innovative utilization

Language: Английский

Citations

61
Porous organic polymers: a progress report in China DOI Open Access
Qing Hao,

You Tao,

Xuesong Ding

et al.

Science China Chemistry, Journal Year: 2023, Volume and Issue: unknown

Published: Feb. 3, 2023

Language: Английский

Citations

59
Postsynthetic Transformation of Imine- into Nitrone-Linked Covalent Organic Frameworks for Atmospheric Water Harvesting at Decreased Humidity DOI Creative Commons
Lars Grunenberg, Gökçen Savaşçı, Sebastian T. Emmerling

et al.

Journal of the American Chemical Society, Journal Year: 2023, Volume and Issue: 145(24), P. 13241 - 13248

Published: May 26, 2023

Herein, we report a facile postsynthetic linkage conversion method giving synthetic access to nitrone-linked covalent organic frameworks (COFs) from imine- and amine-linked COFs. The new two-dimensional (2D) frameworks, NO-PI-3-COF NO-TTI-COF, are obtained with high crystallinity large surface areas. Nitrone-modified pore channels induce condensation of water vapor at 20% lower humidity compared their amine- or imine-linked precursor Thus, the topochemical transformation nitrone linkages constitutes an attractive approach postsynthetically fine-tune adsorption properties in framework materials.

Language: Английский

Citations

55
Post-synthetic modifications of covalent organic frameworks (COFs) for diverse applications DOI
Narges Abdolhossein Rejali, Mohammad Dinari, Yong Wang

et al.

Chemical Communications, Journal Year: 2023, Volume and Issue: 59(78), P. 11631 - 11647

Published: Jan. 1, 2023

Covalent organic frameworks (COFs) are porous and crystalline polymers, which have found usage in various fields. These tailorable through the introduction of diverse functionalities into platform. Indeed, functionality plays a key role their different applications. However, sometimes functional groups not compatible with reaction conditions or can compete interfere other monomers direct synthetic method. Also, pre-synthesis bulky moieties COFs negatively affect crystal formation. To avoid these problems post-synthetic modification (PSM) approach is helpful tactic. assistance this strategy size be tunable stability improved without considerable effect on crystallite. In addition, conductivity, hydrophobicity/ hydrophilicity, chirality among features that reformed review, types PSM strategies based recent articles been divided four categories: (i) post-functionalization, (ii) post-metalation, (iii) chemical locking, (iv) host-guest post-modifications. Post-functionalization locking methods covalent bond formation while post-metalation post-modifications, non-covalent bonds formed. potential post-modified energy storage conversion (lithium-sulfur batteries, hydrogen storage, proton-exchange membrane fuel cells, water splitting), heterogeneous catalysts, food safety evaluation, gas separation, environmental domains (greenhouse capture, radioactive element uptake, remediation), biological applications (drug delivery, biosensors, biomarker chiral column chromatography, solid-state smart nanochannels) discussed.

Language: Английский

Citations

54
Pore Space Partition Synthetic Strategy in Imine-linked Multivariate Covalent Organic Frameworks DOI
Mengjie Hao,

Yinghui Xie,

Ming Lei

et al.

Journal of the American Chemical Society, Journal Year: 2023, Volume and Issue: 146(3), P. 1904 - 1913

Published: Dec. 22, 2023

Partitioning the pores of covalent organic frameworks (COFs) is an attractive strategy for introducing microporosity and achieving new functionality, but it technically challenging to achieve. Herein, we report a simple partitioning micropores/mesopores multivariate COFs. Our approach relies on predesign synthesis multicomponent COFs through imine condensation reactions with aldehyde groups anchored in COF pores, followed by inserting additional symmetric building blocks (with C2 or C3 symmetries) as pore partition agents. This allowed tetragonal hexagonal be partitioned into two three smaller micropores, respectively. The synthesized library pore-partitioned was then applied capture iodine pollutants (i.e., I2 CH3I). rich inventory deep exploration relationships between adsorbent composition, architecture, adsorption capacity CH3I under wide-ranging conditions. Notably, one our developed (COF 3-2P) exhibited greatly enhanced dynamic performances compared its parent 3) breakthrough tests, setting benchmark COF-based adsorbents. Results present effective design toward functional tunable environments, functions, properties.

Language: Английский

Citations

50
General Strategy for Incorporation of Functional Group Handles into Covalent Organic Frameworks via the Ugi Reaction DOI
Alexander Volkov,

Jiashan Mi,

Kanika Lalit

et al.

Journal of the American Chemical Society, Journal Year: 2023, Volume and Issue: 145(11), P. 6230 - 6239

Published: March 9, 2023

The library of imine-linked covalent organic frameworks (COFs) has grown significantly over the last two decades, featuring a variety morphologies, pore sizes, and applications. An array synthetic methods been developed to expand scope COF functionalities; however, most these were designed introduce functional scaffolds tailored specific application. Having general approach diversify COFs via late-stage incorporation group handles would greatly facilitate transformation materials into platforms for useful Herein, we report strategy in Ugi multicomponent reaction. To demonstrate versatility this approach, have synthesized with hexagonal kagome morphologies. We then introduced azide, alkyne, vinyl groups, which could be readily utilized post-synthetic modifications. This facile enables functionalization any containing imine linkages.

Language: Английский

Citations

45
Structural Regulation of Covalent Organic Frameworks for Catalysis DOI
Yunyang Qian, Hai‐Long Jiang

Accounts of Chemical Research, Journal Year: 2024, Volume and Issue: 57(8), P. 1214 - 1226

Published: March 29, 2024

ConspectusChemical reactions can be promoted at lower temperatures and pressures, thereby reducing the energy input, by introducing suitable catalysts. Despite its significance, quest for efficient stable catalysts remains a significant challenge. In this context, addressing efficiency of stands out as paramount concern. However, challenges posed vague structure limited tailorability traditional would make it highly desirable to fabricate optimized based on understanding structure–activity relationships. Covalent organic frameworks (COFs), subclass fully designed crystalline materials formed polymerization building blocks through covalent bonds have garnered widespread attention in catalysis. The precise customizable structures COFs, coupled with attributes such high surface area facile functional modification, COFs attractive molecular platforms catalytic applications. These inherent advantages position ideal catalysts, facilitating elucidation structure-performance relationships further improving Nevertheless, there is lack systematic emphasis summary structural regulation atomic/molecular level COF Consequently, growing need summarize research field provide deep insights into COF-based catalysis promote development.In Account, we will recent advances achieved placing an design enhanced Considering unique components present fundamental principles rational This Account starts presenting overview explaining why are promising Then, introduce principle Next, following three aspects specific strategies catalysts: (1) By designing different groups integrating metal species unit, activity and/or selectivity finely modulated. (2) Regulating linkage facilitates charge transfer modulates electronic sites, accordingly, intrinsic activity/selectivity improved. (3) means pore wall/space engineering, microenvironment surrounding sites modulated optimize performance. Finally, current future developments discussed detail. provides insight toward their performance, which inspiration other heterogeneous

Language: Английский

Citations

34
Tris(triazolo)triazine‐Based Covalent Organic Frameworks for Efficiently Photocatalytic Hydrogen Peroxide Production DOI
Zhenwei Zhang, Qi Zhang,

Yuxin Hou

et al.

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(45)

Published: July 1, 2024

Abstract Two‐dimensional covalent organic frameworks (2D‐COFs) have recently emerged as fascinating scaffolds for solar‐to‐chemical energy conversion because of their customizable structures and functionalities. Herein, two tris(triazolo)triazine‐based COF materials (namely COF‐JLU51 COF‐JLU52) featuring large surface area, high crystallinity, excellent stability photoelectric properties were designed constructed the first time. Remarkably, gave an outstanding H 2 O production rate over 4200 μmol g −1 h with reusability in pure water under one standard sun light, that higher than its isomorphic COF‐JLU52 most reported metal‐free materials, owing to superior generation, separation transport photogenerated carriers. Experimental theoretical researches prove photocatalytic process undergoes a combination indirect 2e − reduction reaction (ORR) 4e oxidation (WOR). Specifically, ultrahigh yield 7624.7 apparent quantum 18.2 % was achieved 1 : ratio benzyl alcohol system. This finding contributes novel, nitrogen‐rich high‐quality also designate bright future solar transformations.

Language: Английский

Citations

23
The development of catalysts and auxiliaries for the synthesis of covalent organic frameworks DOI
Wei Zhao, Qiang Zhu, Xiaofeng Wu

et al.

Chemical Society Reviews, Journal Year: 2024, Volume and Issue: 53(14), P. 7531 - 7565

Published: Jan. 1, 2024

Covalent organic frameworks (COFs) have recently seen significant advancements. Large quantities of structurally & functionally oriented COFs with a wide range applications, such as gas adsorption, catalysis, separation, and drug delivery, been explored. Recent achievements in this field are primarily focused on advancing synthetic methodologies, catalysts playing crucial role achieving highly crystalline COF materials, particularly those featuring novel linkages chemistry. A series reviews already published over the last decade, covering fundamentals, synthesis, applications COFs. However, despite pivotal that auxiliaries play forming materials adjusting their properties (

Language: Английский

Citations

21