Tuning Photoexcited Charge Transfer in Imine-Linked Two-Dimensional Covalent Organic Frameworks
Abstract
The generation of a long-lived charge-separated state in versatile π-conjugated two-dimensional covalent organic frameworks (2D COFs), a process essential to extending their great potentials in advanced semiconducting applications, is yet fully elucidated. Herein, we report a systematic investigation of the photophysical properties of three highly crystalline imine-linked 2D COFs using steady-state and transient absorption spectroscopy accompanied by time-dependent density functional theory (TDDFT) calculations. The different electron affinity between 5,5',5''-(1,3,5-benzenetriyl)-tris(2-pyridinecarboxaldehyde) (BTPA) and three tunable electron-donating/accepting triamine monomers dominated the formation of the excited state, charge transfer direction and lifetime. A prominent charge transfer from electron-rich 4,4',4''-triaminotriphenylamine (TAPA) to BTPA in COFTAPA-BTPA led to the long-lived charge-separated state, which was attributed to a greater degree of delocalization compared to the two other COFs. Furthermore, these results provide fundamental insight into the importance of structure-property correlation for designing advanced photoactive 2D COF materials with the efficient charge transfer and long-lived charge-separated state.
- Authors:
-
- China Univ. of Geosciences, Beijing (China); Chinese Academy of Sciences (CAS), Beijing (China)
- Marquette Univ., Milwaukee, WI (United States)
- China Univ. of Geosciences, Beijing (China)
- Chinese Academy of Sciences (CAS), Beijing (China)
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Publication Date:
- Research Org.:
- Marquette Univ., Milwaukee, WI (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1903130
- Alternate Identifier(s):
- OSTI ID: 1865056; OSTI ID: 2335696
- Grant/Contract Number:
- SC0020122; AC02-05CH11231
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of Physical Chemistry Letters
- Additional Journal Information:
- Journal Volume: 13; Journal Issue: 6; Journal ID: ISSN 1948-7185
- Publisher:
- American Chemical Society
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 14 SOLAR ENERGY; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; Charge transfer; Covalent organic framework; Femtosecond transient absorption spectroscopy; Imine linkage; Photoexcited dynamics; Diffraction; Excitons; Time dependant density functional theory; Monomers
Citation Formats
Feng, Tiantian, Streater, Daniel, Sun, Bing, Duisenova, Korlan, Wang, Dong, Liu, Yi, Huang, Jier, and Zhang, Jian. Tuning Photoexcited Charge Transfer in Imine-Linked Two-Dimensional Covalent Organic Frameworks. United States: N. p., 2022.
Web. doi:10.1021/acs.jpclett.1c04163.
Feng, Tiantian, Streater, Daniel, Sun, Bing, Duisenova, Korlan, Wang, Dong, Liu, Yi, Huang, Jier, & Zhang, Jian. Tuning Photoexcited Charge Transfer in Imine-Linked Two-Dimensional Covalent Organic Frameworks. United States. https://doi.org/10.1021/acs.jpclett.1c04163
Feng, Tiantian, Streater, Daniel, Sun, Bing, Duisenova, Korlan, Wang, Dong, Liu, Yi, Huang, Jier, and Zhang, Jian. Fri .
"Tuning Photoexcited Charge Transfer in Imine-Linked Two-Dimensional Covalent Organic Frameworks". United States. https://doi.org/10.1021/acs.jpclett.1c04163. https://www.osti.gov/servlets/purl/1903130.
@article{osti_1903130,
title = {Tuning Photoexcited Charge Transfer in Imine-Linked Two-Dimensional Covalent Organic Frameworks},
author = {Feng, Tiantian and Streater, Daniel and Sun, Bing and Duisenova, Korlan and Wang, Dong and Liu, Yi and Huang, Jier and Zhang, Jian},
abstractNote = {The generation of a long-lived charge-separated state in versatile π-conjugated two-dimensional covalent organic frameworks (2D COFs), a process essential to extending their great potentials in advanced semiconducting applications, is yet fully elucidated. Herein, we report a systematic investigation of the photophysical properties of three highly crystalline imine-linked 2D COFs using steady-state and transient absorption spectroscopy accompanied by time-dependent density functional theory (TDDFT) calculations. The different electron affinity between 5,5',5''-(1,3,5-benzenetriyl)-tris(2-pyridinecarboxaldehyde) (BTPA) and three tunable electron-donating/accepting triamine monomers dominated the formation of the excited state, charge transfer direction and lifetime. A prominent charge transfer from electron-rich 4,4',4''-triaminotriphenylamine (TAPA) to BTPA in COFTAPA-BTPA led to the long-lived charge-separated state, which was attributed to a greater degree of delocalization compared to the two other COFs. Furthermore, these results provide fundamental insight into the importance of structure-property correlation for designing advanced photoactive 2D COF materials with the efficient charge transfer and long-lived charge-separated state.},
doi = {10.1021/acs.jpclett.1c04163},
journal = {Journal of Physical Chemistry Letters},
number = 6,
volume = 13,
place = {United States},
year = {Fri Feb 04 00:00:00 EST 2022},
month = {Fri Feb 04 00:00:00 EST 2022}
}
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