Topologically Isomeric Effects on the Photocatalytic H<sub>2</sub>O<sub>2</sub> Production Performance of Two-dimensional Covalent Organic Frameworks

Xing Su; Yi-Xue Xu; Chao Liu; Peng-Ju Tian; Ya Lu; Mei-Mei Zhang; Shun-Feng Li; Meng-Jing Sun; Fan Qiu; Yu-Qiao Wang; Yu-Bin Fu; Shun-Qi Xu; Xin Zhao

doi:10.1007/s10118-026-3602-0

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Topologically Isomeric Effects on the Photocatalytic H₂O₂ Production Performance of Two-dimensional Covalent Organic Frameworks

RESEARCH ARTICLE | Updated：2026-04-30

- Topologically Isomeric Effects on the Photocatalytic H₂O₂ Production Performance of Two-dimensional Covalent Organic Frameworks
- Chinese Journal of Polymer Science Vol. 44, Issue 5, Pages: 1403-1410(2026)
- Affiliations：
  
  a.Key Lab of Functional Polymers for Sustainability of Jiangsu, School of Energy and Environment, Southeast University, Nanjing 211189, China
  b.Research Center for Nano Photoelectrochemistry and Devices, School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, China
  c.The Institute for Advanced Studies, Hubei Key Lab on Organic and Polymeric Opto-Electronic Materials, Wuhan University, Wuhan 430072, China
- Author bio：
  
  shunqi.xu@seu.edu.cn (S.Q.X.)
  xin-zhao@seu.edu.cn (X.Z.)
- Funds：
- DOI：10.1007/s10118-026-3602-0
  CLC：
- Received：07 January 2026，
  
  Accepted：29 January 2026，
  
  Online First：09 April 2026，
  
  Published：05 May 2026
- Accepted：
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Su, X.; Xu, Y. X.; Liu, C.; Tian, P. J.; Lu, Y.; Zhang, M. M.; Li, S. F.; Sun, M. J.; Qiu, F.; Wang, Y. Q.; Fu, Y. B.; Xu, S. Q.; Zhao, X. Topologically isomeric effects on the photocatalytic H₂O₂ production performance of two-dimensional covalent organic frameworks. Chinese J. Polym. Sci. 2026, 44, 1403–1410

Xing Su, Yi-Xue Xu, Chao Liu, et al. Topologically Isomeric Effects on the Photocatalytic H₂O₂ Production Performance of Two-dimensional Covalent Organic Frameworks[J]. Chinese Journal of Polymer Science, 2026, 44(5): 1403-1410.
Su, X.; Xu, Y. X.; Liu, C.; Tian, P. J.; Lu, Y.; Zhang, M. M.; Li, S. F.; Sun, M. J.; Qiu, F.; Wang, Y. Q.; Fu, Y. B.; Xu, S. Q.; Zhao, X. Topologically isomeric effects on the photocatalytic H₂O₂ production performance of two-dimensional covalent organic frameworks. Chinese J. Polym. Sci. 2026, 44, 1403–1410 DOI： 10.1007/s10118-026-3602-0.

Xing Su, Yi-Xue Xu, Chao Liu, et al. Topologically Isomeric Effects on the Photocatalytic H₂O₂ Production Performance of Two-dimensional Covalent Organic Frameworks[J]. Chinese Journal of Polymer Science, 2026, 44(5): 1403-1410. DOI： 10.1007/s10118-026-3602-0.

摘要

Topological isomers of 2D covalent organic frameworks (COFs) with

kgm

and

sql

topologies

derived from identical building blocks

reveal a distinct topology-property relationship in photophysical properties and photocatalytic performance.

Abstract

Two-dimensi

onal covalent organic frameworks (2D COFs)

characterized by tunable optoelectronic properties and well-defined porous architectures

have emerged as promising photocatalysts for solar-driven H

production. Although network topology exerts a profound impact on the optoelectronic characteristics of 2D materials

achieving precise regulation of their topology remains a significant challenge. In this study

we report two topologically isomeric 2D COFs constructed from the same building blocks

namely ETBA-

kgm

-COF with a

kgm

topology and ETBA-

sql

-COF with a

sql

topology. Particularly

the isomeric COFs with same chemical compositions provide an ideal platform to isolate and elucidate intrinsic topological effects in 2D COFs. Comprehensive characterizations reveal that the

sql

topology facilitates efficient charge separation and transfer

thereby enhancing photocatalytic performance. Moreover

without any sacrificial agents

ETBA-

sql

-COF exhibits a superior photocatalytic H

production rate up to 2042 μmol·g

–1

·h

–1

which is 1.57 times that of ETBA-

kgm

-COF (1303 μmol·g

–1

·h

–1

). This work provides an in-depth investigation into topology-property relationships in COFs and offers a rational strategy for the design and synthesis of high-performance photocatalysts.

关键词

Keywords

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Topologically Isomeric Effects on the Photocatalytic H2O2 Production Performance of Two-dimensional Covalent Organic Frameworks

DOI：10.1007/s10118-026-3602-0

摘要

Abstract

关键词

Keywords

references

Topologically Isomeric Effects on the Photocatalytic H₂O₂ Production Performance of Two-dimensional Covalent Organic Frameworks