Volume 64, Issue 24 e202500937
Research Article

Design and Construction of D-A-Extended 3D Covalent–Organic Frameworks for Boosting Photocatalytic Hydrogen Evolution

Huijie Li

Huijie Li

State Key Lab of Structure Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350002 P.R. China

College of Chemistry, Fuzhou University, Fuzhou, Fujian, 350108 P. R. China

Fujian College, University of Chinese Academy of Sciences, Fuzhou, 350108 P.R. China

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Jie Fan

Jie Fan

State Key Lab of Structure Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350002 P.R. China

University of Chinese Academy of Sciences, Beijing, 100049 P.R. China

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Mengxu Ran

Mengxu Ran

State Key Lab of Structure Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350002 P.R. China

College of Chemistry, Fuzhou University, Fuzhou, Fujian, 350108 P. R. China

Fujian College, University of Chinese Academy of Sciences, Fuzhou, 350108 P.R. China

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Rahul Anil Borse

Rahul Anil Borse

State Key Lab of Structure Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350002 P.R. China

University of Chinese Academy of Sciences, Beijing, 100049 P.R. China

Fujian Science and Technology Innovation Laboratory for Optoelectronic Information of China, Fuzhou, 350108 P.R. China

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Shao-Xia Lin

Corresponding Author

Shao-Xia Lin

State Key Lab of Structure Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350002 P.R. China

Fujian College, University of Chinese Academy of Sciences, Fuzhou, 350108 P.R. China

University of Chinese Academy of Sciences, Beijing, 100049 P.R. China

Fujian Science and Technology Innovation Laboratory for Optoelectronic Information of China, Fuzhou, 350108 P.R. China

E-mail: [email protected]; [email protected]

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Daqiang Yuan

Corresponding Author

Daqiang Yuan

State Key Lab of Structure Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350002 P.R. China

Fujian College, University of Chinese Academy of Sciences, Fuzhou, 350108 P.R. China

University of Chinese Academy of Sciences, Beijing, 100049 P.R. China

Fujian Science and Technology Innovation Laboratory for Optoelectronic Information of China, Fuzhou, 350108 P.R. China

E-mail: [email protected]; [email protected]

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First published: 07 April 2025
Citations: 2

Graphical Abstract

This study successfully developed three distinct 3D extended D-A COFs with a pyr topology by employing a newly designed intrinsic D-A type building block. Among these, the A-D-A structured COF stands out due to its multiple charge transfer channels in 3D space, resulting in an enhanced photocatalytic hydrogen evolution rate. This finding provides valuable insights into designing extended D-A constructs within 3D frameworks to optimize photocatalytic performance.

Abstract

The development of donor–acceptor (D-A) covalent–organic frameworks (COFs) has emerged as a promising strategy for enhancing photocatalytic performance. Although most studies have concentrated on 2D COFs, research into their 3D counterparts remains limited. In this study, we rationally designed and synthesized a carbazoyl dicyanobenzene derivative (TBFCC) as an intrinsic D-A building block. By selecting TAPA, TAPB, and TAPT as the donor, acceptor-π, and acceptor donors, respectively, we synthesized three distinct D-A-extended COF materials: D-D-A, A-π-D-A, and A-D-A. Among these, 3D-TAPT-COF, featuring an A-D-A structure, exhibited the highest hydrogen evolution rate of 31.3 mmol g−1 h−1, surpassing most previously reported 3D COF-based photocatalysts. This superior performance is attributed to its A-D-A configuration, which provides multiple charge transfer pathways in 3D space, overcoming the electron transport limitations inherent in 2D COFs. Consequently, this feature facilitates efficient separation of photogenerated charges within the framework and reduces carrier recombination, thereby optimizing photocatalytic efficiency.

Conflict of Interests

The authors declare no conflict of interest.

Data Availability Statement

The data that support the findings of this study are available in the Supporting Information of this article.

The full text of this article hosted at iucr.org is unavailable due to technical difficulties.