期刊
ISCIENCE
卷 24, 期 6, 页码 -出版社
CELL PRESS
DOI: 10.1016/j.isci.2021.102526
关键词
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资金
- National Natural Science Foundation of China [61378072, 61178007, 61522510, 61308087]
- Strategic Priority Research Program of CAS [XDB160307]
- Key Research Program of Frontier Science of CAS [QYZDB-SSW-JSC041]
- STCSM Excellent Academic Leader of Shanghai [17XD1403900]
- Ministry of Education [TS2010HDLG024]
- State Administration of Foreign Experts Affairs [TS2010HDLG024]
COF-Pors are novel ether-linked porphyrin covalent organic framework materials with highly ordered lattice structure, exhibiting large NLO effect in a broad range from visible to near infrared. They show typical saturable absorption effect at lower incident laser energy, and reverse saturable absorption response at higher pulse energy.
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 pi-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.
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