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Title: Isoreticular series of two-dimensional covalent organic frameworks with the kgd topology and controllable micropores
Authors: Li, Liuxiao
Yun, Qinbai
Zhu, Chongzhi
Sheng, Guan
Guo, Jun
Chen, Bo
Zhao, Meiting
Zhang, Zhicheng
Lai, Zhuangchai
Zhang, Xiao
Peng, Yongwu
Zhu, Yihan
Zhang, Hua
Keywords: Engineering::Chemical engineering
Issue Date: 2022
Source: Li, L., Yun, Q., Zhu, C., Sheng, G., Guo, J., Chen, B., Zhao, M., Zhang, Z., Lai, Z., Zhang, X., Peng, Y., Zhu, Y. & Zhang, H. (2022). Isoreticular series of two-dimensional covalent organic frameworks with the kgd topology and controllable micropores. Journal of the American Chemical Society, 144(14), 6475-6482.
Journal: Journal of the American Chemical Society
Abstract: Two-dimensional (2D) covalent organic frameworks (COFs) possess designable pore architectures but limited framework topologies. Until now, 2D COFs adopting the kgd topology with ordered and rhombic pore geometry have rarely been reported. Here, an isoreticular series of 2D COFs with the kgd topology and controllable pore size is synthesized by employing a C6-symmetric aldehyde, i.e., hexa(4-formylphenyl)benzene (HFPB), and C3-symmetric amines i.e., tris(4-aminophenyl)amine (TAPA), tris(4-aminophenyl)trazine (TAPT), and 1,3,5-tris[4-amino(1,1-biphenyl-4-yl)]benzene (TABPB), as building units, referred to as HFPB-TAPA, HFPB-TAPT, and HFPB-TABPB, respectively. The micropore dimension down to 6.7 Å is achieved in HFPB-TAPA, which is among the smallest pore size of reported 2D COFs. Impressively, both the in-plane network and stacking sequence of the 2D COFs can be clearly observed by low-dose electron microscopy. Integrating the unique kgd topology with small rhombic micropores, these 2D COFs are endowed with both short molecular diffusion length and favorable host-guest interaction, exhibiting potential for drug delivery with high loading and good release control of ibuprofen.
ISSN: 0002-7863
DOI: 10.1021/jacs.2c01199
Rights: © 2022 American Chemical Society. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
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