Ether-linked porphyrin covalent organic framework with broadband optical switch

Zhiwei Liu; Bin Zhang; Yuelin Huang; Yi Song; Ningning Dong; Jun Wang; Yu Chen

doi:10.1016/j.isci.2021.102526

Ether-linked porphyrin covalent organic framework with broadband optical switch

iScience. 2021 May 11;24(6):102526. doi: 10.1016/j.isci.2021.102526. eCollection 2021 Jun 25.

Authors

Zhiwei Liu¹, Bin Zhang¹, Yuelin Huang^{1

2}, Yi Song³, Ningning Dong^{4

5}, Jun Wang^{4

5}, Yu Chen¹

Affiliations

¹ Key Laboratory for Advanced Materials and Joint International Research Laboratory of Precision Chemistry and Molecular Engineering, Feringa Nobel Prize Scientist Joint Research Center, School of Chemistry and Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China.
² School of Materials Science and Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China.
³ Department of Light Industry and Chemical Engineering, Guizhou Light Industry Technical College, 3 Dongqing Road, Huaxi University Town, Guiyang 550025, China.
⁴ Laboratory of Micro-Nano Optoelectronic Materials and Devices, Key Laboratory of Materials for High-Power Laser, Shanghai Institute of Optics and Fine Mechanics, CAS, Shanghai 201800, China.
⁵ State Department Key Laboratory of High Field Laser Physics Shanghai Institute of Optics and Fine Mechanics Chinese Academy of Sciences, Shanghai 201800, China.

Abstract

It is still a challenge to design and synthesize novel switchable optical materials with ultrafast nonlinear optical (NLO) response in a broad spectral range. These materials have exhibited great application potential in many high-technology fields such as biological imaging, chemical sensors, optical data storage, laser protection, and controllable intelligent and optoelectronic devices. By using porphyrins with highly delocalized 18 π-electron conjugated system as functional building blocks, the first ether-linked porphyrin covalent organic framework materials (COF-Pors) with highly ordered lattice structure have been successfully synthesized. In contrast to the starting porphyrins that only exhibit reverse saturable absorption (RSA) response at 532 nm, the as-prepared COF-Pors shows large NLO effect in a broad range from visible to near infrared. Upon laser illumination, COF-Pors exhibits typical saturable absorption (SA) effect at lower incident laser energy, and RSA response at higher pulse energy.

Keywords: Chemistry; Materials science; Optical materials.