Ether-linked porphyrin covalent organic framework with broadband optical switch
Zhiwei Liu1, Bin Zhang1, Yuelin Huang1,2
1Key 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.
Iscience
|June 18, 2021
Summary
Novel covalent organic framework materials (COF-Pors) were synthesized, showing switchable nonlinear optical (NLO) properties across a wide spectrum. These materials offer potential for advanced optical applications due to their tunable saturable absorption and reverse saturable absorption effects.
Area of Science:
- Materials Science
- Optoelectronics
- Nanotechnology
Background:
- Designing switchable optical materials with broad spectral nonlinear optical (NLO) response remains a significant challenge.
- Porphyrins, with their delocalized 18 π-electron systems, are promising functional building blocks for advanced materials.
- NLO materials are crucial for high-technology applications like biological imaging, sensors, and optical devices.
Purpose of the Study:
- To synthesize novel ether-linked porphyrin covalent organic framework materials (COF-Pors).
- To investigate the nonlinear optical properties of the synthesized COF-Pors in a broad spectral range.
- To explore the potential of COF-Pors in switchable optical applications.
Main Methods:
- Synthesis of ether-linked porphyrin covalent organic framework materials (COF-Pors) using porphyrins as building blocks.
- Characterization of the ordered lattice structure of the synthesized COF-Pors.
- Evaluation of nonlinear optical (NLO) responses, including saturable absorption (SA) and reverse saturable absorption (RSA), under laser illumination.
Main Results:
- Successfully synthesized the first ether-linked porphyrin covalent organic framework materials (COF-Pors) with a highly ordered lattice structure.
- The as-prepared COF-Pors exhibited significant NLO effects across a broad spectral range, from visible to near-infrared light.
- COF-Pors demonstrated switchable optical behavior, showing saturable absorption (SA) at lower laser energies and reverse saturable absorption (RSA) at higher energies.
Conclusions:
- Ether-linked porphyrin covalent organic framework materials (COF-Pors) represent a novel class of switchable optical materials.
- These COF-Pors possess broad-spectrum nonlinear optical (NLO) properties with tunable SA and RSA responses.
- The synthesized COF-Pors show great potential for applications in advanced optoelectronic devices and optical technologies.
