Kagome-topology 2D covalent organic frameworks assembled from D2h-symmetric and non-centrosymmetric C2-symmetric blocks for photothermal imaging

Jiahao Li; Guinan Chen; Chunhong Chen; Yuanyuan Lou; Zhihao Xing; Tao Zhang; Chengtao Gong; Yongwu Peng

doi:10.1039/d3cc04502a

Kagome-topology 2D covalent organic frameworks assembled from D_2h-symmetric and non-centrosymmetric C₂-symmetric blocks for photothermal imaging

Chem Commun (Camb). 2023 Nov 2;59(88):13191-13194. doi: 10.1039/d3cc04502a.

Authors

Jiahao Li¹, Guinan Chen¹, Chunhong Chen², Yuanyuan Lou¹, Zhihao Xing¹, Tao Zhang¹, Chengtao Gong¹, Yongwu Peng¹

Affiliations

¹ College of Materials Science and Engineering, Zhejiang University of Technology, Hangzhou, 310014, China. ywpeng@zjut.edu.cn.
² State Key Laboratory of Organic Electronics and Information Displays & Jiangsu Key Laboratory for Biosensors, Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing University of Posts and Telecommunications, Nanjing, China.

PMID: 37850458
DOI: 10.1039/d3cc04502a

Abstract

In this study, we synthesized two new two-dimensional (2D) covalent organic frameworks (COFs), COF-TA and COF-DP, by combining 4-connected D_2h-symmetric and 2-connected non-centrosymmetric C₂-symmetric building blocks. Unlike the typical sql topology, these COFs exhibit an unconventional kgm topology characterized by a favorable anti-parallel stacking arrangement, which results in a lower energy configuration. Notably, COF-DP, with its unique D-A-D structural motif and photosensitive properties, demonstrates a narrow band gap and excellent photothermal conversion capabilities, making it a promising material for photothermal imaging applications.