Towards high-performance nonlinear optical materials through embedding a D-A system into β-ketoenamine-linked COFs

• Published in: Chemical communications (Cambridge, England) Vol. 59; no. 99; pp. 14669 - 14672
• Main Authors: Li, Mingyan, Chu, Jiahui, Ding, Debo, Li, Tingting, Su, Endian, Song, Yinglin, Yang, Yun-Fang, She, Yuanbin, Jia, Jianhong
• Format: Journal Article
• Language: English
• Published: England Royal Society of Chemistry 12.12.2023
• Subjects: Absorptivity; Carbonyls; Electronegativity; Electronic structure; Electrons; Glass substrates; Nonlinear optics; Nonlinearity; Optical materials; Oxygen atoms
• ISSN: 1359-7345; 1364-548X; 1364-548X
• DOI: 10.1039/d3cc04845d

Two covalent organic framework (COF) films supported by a glass substrate were obtained by solvothermal reaction of an electron donor with electron acceptor 1,3,5-triformylbenzene (TF) or 2,4,6-triformylphloroglucinol (TFP), respectively. The TFP-BD film exhibits a nonlinear absorption coefficient of −3.01 × 10 5 cm GW −1 . The TFP-BD film can aggregate electrons around the connected monomer through the D-A effect due to its highly polar and electronegative carbonyl oxygen atoms, thereby modulating the electronic structure of the COFs. This work provides a novel approach for the structural modulation of optical materials with strong nonlinearity. Two covalent organic framework (COF) films supported by a glass substrate were obtained by solvothermal reaction of an electron donor with electron acceptor 1,3,5-triformylbenzene (TF) or 2,4,6-triformylphloroglucinol (TFP), respectively.