Piperazine-Linked Covalent Organic Frameworks with High Electrical Conductivity

Yan Yue; Hanying Li; Hongzheng Chen; Ning Huang

doi:10.1021/jacs.1c13012

Piperazine-Linked Covalent Organic Frameworks with High Electrical Conductivity

J Am Chem Soc. 2022 Feb 23;144(7):2873-2878. doi: 10.1021/jacs.1c13012. Epub 2022 Feb 7.

Authors

Yan Yue¹, Hanying Li¹, Hongzheng Chen¹, Ning Huang¹

Affiliation

¹ MOE Key Laboratory of Macromolecular Synthesis and Functionalization, State Key Laboratory of Silicon Materials, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China.

PMID: 35129344
DOI: 10.1021/jacs.1c13012

Abstract

A new kind of piperazine-linked covalent organic framework (COF) was synthesized through the nucleophilic substitution reaction between octaminophthalocyanines and hexadecafluorophthalocyanines. The two-dimensional (2D) frameworks are in tetragonally shaped polygon sheets, which stack in an AA stacking mode to constitute periodically ordered metallophthalocyanine columns and one-dimensional (1D) microporous channels. The piperazine-linked COFs exhibit excellent chemical stability and permanent porosity. By virtue of the neatly arrayed phthalocyanine columns and inbuilt cationic radicals, the piperazine-linked frameworks are highly conductive. The conductivity values of NiPc-NH-CoPcF₈ COF reached up to 2.72 and 12.7 S m^-1 for pellet and film samples, respectively. Moreover, this p-type conductive COF exhibited a high carrier mobility of 35.4 cm² V^-1 s^-1. Both the electric conductivity and carrier mobility set new records for conductive COFs.