Donor‐Acceptor Pyrene‐Based Covalent Organic Framework for Blue Light Photocatalytic Oxidative Coupling of Amines DOI
Linyang Wang, Jeet Chakraborty,

Maojun Deng

et al.

ChemCatChem, Journal Year: 2024, Volume and Issue: 16(16)

Published: March 26, 2024

Abstract Covalent organic frameworks (COFs) with a donor‐acceptor (D−A) architecture have been investigated as prospective semiconducting materials, particularly for photocatalytic processes. The incorporation of electron donating and accepting moieties into the COF backbone creates nano heterojunctions, enhancing efficient light absorption, charge separation, transport. Herein, three pyrene‐based COFs were well designed aerobic coupling amines under air atmosphere blue‐LED irradiation. Among COFs, Py‐Por‐COF D−A structure exhibits highest performance demonstrates remarkable apparent quantum efficiency 11.3 % at 420 nm. In addition, maintains good level crystallinity high yield even undergone four cycles, showcasing exceptional potential in field transformation.

Language: Английский

Photochromic radical states in 3D covalent organic frameworks with zyg topology for enhanced photocatalysis DOI Creative Commons
Tiantian Ma, Guo‐Zhang Huang, Xiaohan Wang

et al.

National Science Review, Journal Year: 2024, Volume and Issue: 11(7)

Published: May 21, 2024

Covalent-organic frameworks (COFs) with photoinduced donor-acceptor (D-A) radical pairs show enhanced photocatalytic activity in principle. However, achieving long-lived charge separation COFs proves challenging due to the rapid recombination. Here, we develop a novel strategy by combining [6 + 4] nodes construct

Language: Английский

Citations

14
Halogen-Modified Iron-Based Metal–Organic Frameworks for Remarkably Improved Electrocatalytic Oxygen Evolution DOI
Qianglong Qi, Yue Zhang, Chengxu Zhang

et al.

The Journal of Physical Chemistry C, Journal Year: 2024, Volume and Issue: 128(5), P. 1936 - 1945

Published: Jan. 24, 2024

Iron-based metal–organic frameworks (MOFs) have shown potential as catalysts for the electrocatalysis oxygen evolution reaction (OER). Despite numerous methods being employed to enhance OER performance of MOFs, influence halogen-containing linkers on electronic structure iron-based MOF remains unexplored. In this study, a series Fe-based MOFs (denoted MOF-R, where R = H, Cl, or Br) with comparable structures are synthesized by changing organic coordinated Fe metal active center, aim investigating activity. Significantly, MOF-Br exhibited superior activity compared MOF-Cl and MOF-H. Density functional theory calculations reveal that tuning halogen groups can modulate sites effectively regulate adsorption behavior key intermediates near optimal d-band leading enhancement electroactivity. Notably, bromine-substituted catalyst displayed remarkable intrinsic activity, including low overpotential 251.2 mV at current density 10 mA cm–2 Tafel slope 44.5 dec–1, surpassing halogen-unsubstituted MOF-H (262.6 63.4 dec–1) commercial IrO2 (335.3 98.6 dec–1). Moreover, high turnover frequency an 300 was measured be 0.537 s–1, which is 30 times greater than (0.018 s–1). This research offers strategy designing electrocatalysts laying solid foundation rational design synthesis excellent in future.

Language: Английский

Citations

13
Polarization engineering in porous organic polymers for charge separation efficiency and its applications in photocatalytic aerobic oxidations DOI
Kun Wu,

Pei-Wen Cheng,

Xin-Yi Liu

et al.

Science China Chemistry, Journal Year: 2024, Volume and Issue: 67(3), P. 1000 - 1007

Published: Jan. 8, 2024

Language: Английский

Citations

11
Dipole moment regulation for enhancing internal electric field in covalent organic frameworks photocatalysts DOI
Xiaoying Zhao,

Shuaishuai Shang,

Honglai Liu

et al.

Chemosphere, Journal Year: 2024, Volume and Issue: 356, P. 141947 - 141947

Published: April 8, 2024

Language: Английский

Citations

11
Carbazole-Based Imine-Linked Covalent Organic Framework for Efficient Heterogeneous Photocatalysis DOI
Kamal Kant Verma, Matthew A. Addicoat, K. R. Justin Thomas

et al.

ACS Applied Polymer Materials, Journal Year: 2024, Volume and Issue: 6(7), P. 3909 - 3917

Published: March 27, 2024

Donor–acceptor covalent organic framework (COF) materials have proven to be an optimal choice for heterogeneous photocatalysis due their capacity effective charge separation and harvesting of visible light. The poor chemical photostability imine-linked D–A COFs restrict potential broader applications. So, researchers are focused on developing with enhanced photocatalytic activity. In this study, we also emphasize the pivotal role molecular engineering overcome these challenges. Herein, a carbazole-based highly crystalline CzDA-TAPT COF was developed. Not only does incorporation alkyl group-substituted carbazole provide excellent donor ability, but butyl groups in pore skeleton guide attachment successive layers different AB stackings, significantly amplifying efficiency by providing more active sites reaction. Compared previously reported photoactive benzothiadiazole-based COFs, innovative material exhibits superior heightened photostability, resulting notable advancement aerobic oxidation aryl boronic acids phenols.

Language: Английский

Citations

9
Multipath charge transfer in Cu-BTC@CuS@CeO2 double p-n heterojunction hollow octahedrons for enhanced photocatalytic amine oxidation DOI

Yaxin Ru,

Yajie Chen, Xinyan Yu

et al.

Chemical Engineering Journal, Journal Year: 2023, Volume and Issue: 475, P. 146158 - 146158

Published: Sept. 20, 2023

Language: Английский

Citations

21
Rational design of bimetallic sites in covalent organic frameworks for efficient photocatalytic oxidative coupling of amines DOI

Songhu Shi,

Wenhao Liu, Yujie Li

et al.

Journal of Colloid and Interface Science, Journal Year: 2023, Volume and Issue: 655, P. 611 - 621

Published: Nov. 7, 2023

Language: Английский

Citations

17
Primitive functional groups directed distinct photocatalytic performance of imine-linked donor-acceptor covalent organic frameworks DOI

Xitong Ren,

Jiajie Sun, Yusen Li

et al.

Nano Research, Journal Year: 2024, Volume and Issue: 17(6), P. 4994 - 5001

Published: March 22, 2024

Language: Английский

Citations

8
Enhancing photocatalytic H2O2 production of donor−acceptor polymers by modulation of polymerization modes DOI
Chao Yang, Yao Xiang, Wang Wang

et al.

Applied Catalysis B Environment and Energy, Journal Year: 2024, Volume and Issue: unknown, P. 124856 - 124856

Published: Nov. 1, 2024

Language: Английский

Citations

8
Precise Modulation of Conjugative Structure and Porosity in Covalent Organic Frameworks for Transition Metal Free Visible-Light Catalysis of Trifluoromethylation DOI
Fei Xue, Jun Zhang, Zhonggang Wang

et al.

ACS Catalysis, Journal Year: 2024, Volume and Issue: 14(7), P. 5377 - 5388

Published: March 26, 2024

The precise modulation of conjugative structure and porosity parameters in photoactive covalent organic frameworks (COFs) remains challenging yet attractive the photocatalytic field. This work presents three porous donor–acceptor COFs constructed from phenothiazines triazines. Their performance mechanism trifluoromethylation for oxindoles heteroaromatic compounds are studied. High conversions up to 95% achieved under visible light (430 nm) at room temperature absence any transition metal. Of interest is observation that efficiencies remarkably improved by π-conjugation length position imine spacer between units. reason explained virtue different harvesting, separation capability photogenerated electrons holes, charge transport, pore size COFs, as reflected their variations fluorescence lifetimes, current intensities, distances, impedances transfer. revealed results helpful an in-depth understanding effects on activity COFs. Moreover, created catalysts show promising application metal-free heterocyclic pharmaceuticals.

Language: Английский

Citations

7