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Yan Y, Zhao Y, Chen X, Lu Z, Peng Y, Chen Z, Xu Q. Linkage-Mediated Electronic Structure Modulation in Multicomponent Covalent Organic Frameworks for Dramatically Promoted Photocatalytic Hydrogen Evolution. Chemistry 2024; 30:e202401122. [PMID: 38749913 DOI: 10.1002/chem.202401122] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2024] [Indexed: 06/01/2024]
Abstract
Linkage chemistry is an essential aspect to covalent organic framework (COF) applications; it is highly desirable to precisely modulate electronic structure mediated directly by linkage for efficient COF-based photocatalytic hydrogen evolution, which however, remains substantially challenging. Herein, as a proof of concept, a collection of robust multicomponent pyrene-based COFs with abundant donor-acceptor (D-A) interactions has been judiciously designed and synthesized through molecularly engineering linkage for photogeneration of hydrogen. Controlled locking and conversion of linkage critically contribute to continuously regulating COFs' electronic structures further to optimize photocatalytic activities. Remarkably, the well-modulated optoelectronic properties turn on the average hydrogen evolution rate from zero to 15.67 mmol g-1 h-1 by the protonated quinoline-linked COF decorated with the trifluoromethyl group (TT-PQCOF-CF3). Using diversified spectroscopy and theoretical calculations, we show that multiple modifications toward linkage synergistically lead to the redistribution of charge on COFs with extended π-conjugation and reinforced D-A effect, making TT-PQCOF-CF3 a promising material with significantly boosted carrier separation and migration. This study provides important guidance for the design of high-performance COF photocatalysts based on the strategy of linkage-mediated electronic structure modulation in COFs.
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Affiliation(s)
- Yu Yan
- Henan Institute of Advanced Technology, Zhengzhou University, Zhengzhou, 450003, China
| | - Yanming Zhao
- Henan Institute of Advanced Technology, Zhengzhou University, Zhengzhou, 450003, China
| | - Xikai Chen
- Henan Institute of Advanced Technology, Zhengzhou University, Zhengzhou, 450003, China
| | - Zhou Lu
- Department of Chemistry, University of Rochester, Rochester, New York, 14621, United States
| | - Yunlei Peng
- Department of Applied Chemistry, College of Science, China, University of Petroleum (Beijing), Beijing, 102249, China
| | - Zongwei Chen
- Henan Institute of Advanced Technology, Zhengzhou University, Zhengzhou, 450003, China
| | - Qun Xu
- Henan Institute of Advanced Technology, Zhengzhou University, Zhengzhou, 450003, China
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Xu X, Dai S, Xu S, Zhu Q, Li Y. Efficient Photocatalytic Cleavage of Lignin Models by a Soluble Perylene Diimide/Carbon Nitride S-Scheme Heterojunction. Angew Chem Int Ed Engl 2023; 62:e202309066. [PMID: 37675642 DOI: 10.1002/anie.202309066] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2023] [Revised: 09/03/2023] [Accepted: 09/04/2023] [Indexed: 09/08/2023]
Abstract
3,4,9,10-Perylenetetracarboxylic dianhydride (PDI) is one of the best n-type organic semiconductors and an ideal light-driven catalyst for lignin depolymerization. However, the charge localization effect and the excessively strong intermolecular aggregation trend in PDI result in rapid electron-hole (e- -h+ ) recombination, which limits photocatalytic performance. Herein, polymeric carbon nitride/polyhedral oligomeric silsesquioxane PDI (p-CN/P-PDI) S-scheme heterojunction photocatalyst was prepared by the solvent evaporation-deposition method for C-C bond selective cleavage of lignin β-O-4 model. Based on the material characterization results, the synergic role of polyhedral oligomeric silsesquioxane (POSS) and S-scheme heterojunction maintains appropriate aggregation domains, achieves better solar light utilization, faster charge-transfer efficiency, and greater redox capacity. Notably, the 3 % p-CN/P-PDI heterostructure exhibits a remarkable enhancement in cleavage conversion efficiency, achieving approximately 16.42 and 2.57 times higher conversion rates compared to polyhedral oligomeric silsesquioxane modified PDI (POSS-PDI) and polymeric carbon nitride (p-CN), respectively.
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Affiliation(s)
- Xiaotong Xu
- Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region, Ministry of Education, School of Water and Environment, Chang'an University, Xi'an, 710064, P. R. China
| | - Shuqi Dai
- Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region, Ministry of Education, School of Water and Environment, Chang'an University, Xi'an, 710064, P. R. China
| | - Shuai Xu
- Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region, Ministry of Education, School of Water and Environment, Chang'an University, Xi'an, 710064, P. R. China
| | - Qi Zhu
- Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region, Ministry of Education, School of Water and Environment, Chang'an University, Xi'an, 710064, P. R. China
| | - Yuliang Li
- Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region, Ministry of Education, School of Water and Environment, Chang'an University, Xi'an, 710064, P. R. China
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Ke Q, Fang S, Tang J, Li F, Ning C, Tang Z, Ling Q, Liu X, Cui P. Perovskite LaSrCoFeO6 Oxide Enabled Visible‐Light Catalytic Aerobic Epoxidation of Styrene. CHEMPHOTOCHEM 2022. [DOI: 10.1002/cptc.202200075] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Qingping Ke
- Anhui University of Technology School of Chemistry and Chemical Engineering Anhui University of Technology 243002 Ma'anshan CHINA
| | - Shuai Fang
- Anhui University of Technology College of Chemistry and Chemical Engineering CHINA
| | - Jun Tang
- Anhui University of Technology College of Chemistry and Chemical Engineering CHINA
| | - Fengfeng Li
- Anhui University of Technology College of Chemistry and Chemical Engineering CHINA
| | - Chuantao Ning
- Anhui University of Technology College of chemistry and Chemical Engineering College of Chemistry and Chemical enginnering 243002 Maanshan CHINA
| | - Zhicheng Tang
- Anhui University of Technology College of chemistry and Chemical Engineering College of Chemistry and Chemical enginnering 243002 Maanshan CHINA
| | - Qiang Ling
- Anhui University of Technology College of Chemistry and Chemical Engineering CHINA
| | - Xiangchun Liu
- Anhui University of Technology College of Chemistry and Chemical Engineering CHINA
| | - Ping Cui
- Anhui University of Technology College of Chemistry and Chemical Engineering CHINA
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Kim D, Calabro RL, Masud AA, Kothalawala NL, Gu M, Kwak SY, Son WJ, Hwang KY, Choi H, Richards CI, Kim DY, Kim BS. Exploring the Role of Surface States in Emissive Carbon Nanodots: Analysis at Single-Particle Level. Chem Asian J 2021; 16:4155-4164. [PMID: 34734682 DOI: 10.1002/asia.202101087] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2021] [Revised: 11/01/2021] [Indexed: 11/11/2022]
Abstract
Fluorescent carbon nanodots (CDs) have been highlighted as promising semiconducting materials due to their outstanding chemical and optical properties. However, the intrinsic heterogeneity of CDs has impeded a clear understanding of the mechanisms behind their photophysical properties. In this study, as-prepared CDs are fractionated via chromatography to reduce their structural and chemical heterogeneity and analyzed through ensemble and single-particle spectroscopies. Many single particles reveal fluorescence intensity fluctuations between two or more discrete levels with bi-exponential decays. While the intrinsic τ1 components are uniform among single particles, the τ2 components from molecule-like emissions spans a wider range of lifetimes, reflecting the inhomogeneity of the surface states. Furthermore, it is concluded that the relative population and chemical states of surface functional groups in CDs have a significant impact on emissive states, brightness, blinking, stability, and lifetime distribution of photoluminescence.
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Affiliation(s)
- Dongseok Kim
- Department of Chemistry, Yonsei University, Seoul, 03722, Republic of Korea
| | - Rosemary L Calabro
- Department of Chemistry, University of Kentucky, 505 Rose Street, Lexington, Kentucky, 40506-0055, United States
| | - Abdullah A Masud
- Department of Chemistry, University of Kentucky, 505 Rose Street, Lexington, Kentucky, 40506-0055, United States
| | - Nadeesha L Kothalawala
- Department of Chemistry, University of Kentucky, 505 Rose Street, Lexington, Kentucky, 40506-0055, United States
| | - Minsu Gu
- Department of Chemistry, Yonsei University, Seoul, 03722, Republic of Korea.,Department of Chemical Engineering (BK21 FOUR), Dong-A University, Busan, 49315, Republic of Korea
| | - Seung-Yeon Kwak
- Samsung Advanced Institute of Technology (SAIT), Samsung Electronics Co. Ltd., Suwon, 16678, Republic of Korea
| | - Won-Joon Son
- Data and Information Technology (DIT) Center, Samsung Electronics, Hwaseong, 18448, Republic of Korea
| | - Kyu Young Hwang
- Samsung Advanced Institute of Technology (SAIT), Samsung Electronics Co. Ltd., Suwon, 16678, Republic of Korea
| | - Hyeonho Choi
- Samsung Advanced Institute of Technology (SAIT), Samsung Electronics Co. Ltd., Suwon, 16678, Republic of Korea
| | - Christopher I Richards
- Department of Chemistry, University of Kentucky, 505 Rose Street, Lexington, Kentucky, 40506-0055, United States
| | - Doo Young Kim
- Department of Chemistry, University of Kentucky, 505 Rose Street, Lexington, Kentucky, 40506-0055, United States
| | - Byeong-Su Kim
- Department of Chemistry, Yonsei University, Seoul, 03722, Republic of Korea
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