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Li J, Jin H, Qin T, Liu F, Wu S, Feng L. Symmetrical Localized Built-in Electric Field by Induced Polarization Effect in Ionic Covalent Organic Frameworks for Selective Imaging and Killing Bacteria. ACS NANO 2024; 18:4539-4550. [PMID: 38261792 DOI: 10.1021/acsnano.3c11628] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/25/2024]
Abstract
Photocatalytic materials are some of the most promising substitutes for antibiotics. However, the antibacterial efficiency is still inhibited by the rapid recombination of the photogenerated carriers. Herein, we design a cationic covalent organic framework (COF), which has a symmetrical localized built-in electric field due to the induced polarization effect caused by the electron-transfer reaction between the Zn-porphyrin unit and the guanidinium unit. Density functional theory calculations indicate that there is a symmetrical electrophilic/nucleophilic region in the COF structure, which results from increased electron density around the Zn-porphyrin unit. The formed local electric field can further inhibit the recombination of photogenerated carriers by driving rapid electron transfer from Zn-porphyrin to guanidinium under light irradiation, which greatly increases the yield of reactive oxygen species. This COF wrapped by DSPE-PEG2000 can selectively target the lipoteichoic acid of Gram-positive bacteria by electrostatic interaction, which can be used for selective discrimination and imaging of bacteria. Furthermore, this nanoparticle can rapidly kill Gram-positive bacteria including 99.75% of Staphylococcus aureus and 99.77% of Enterococcus faecalis at an abnormally low concentration (2.00 ppm) under light irradiation for 20 min. This work will provide insight into designing photoresponsive COFs through engineering charge behavior.
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Affiliation(s)
- Jianfang Li
- School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan 030006, People's Republic of China
| | - Huiqin Jin
- School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan 030006, People's Republic of China
| | - Tao Qin
- Department of Chemistry and Chemical Engineering, Jinzhong University, Jinzhong 030619, People's Republic of China
| | - Feng Liu
- School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan 030006, People's Republic of China
| | - Shuilin Wu
- School of Materials Science and Engineering, Peking University, Beijing 100871, People's Republic of China
| | - Liheng Feng
- School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan 030006, People's Republic of China
- Institute for Carbon-Based Thin Film Electronics, Peking University, Shanxi (ICTFE-PKU), Taiyuan 030012, People's Republic of China
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Wang YT, Wu SM, Luo GQ, Xiao ST, Pu FF, Wang LY, Chang GG, Tian G, Yang XY. Dual Pd-Acid Sites Confined in a Hierarchical Core-Shell Structure for Hydrogenation of Nitrobenzene. Chem Asian J 2023; 18:e202300689. [PMID: 37704571 DOI: 10.1002/asia.202300689] [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: 08/07/2023] [Revised: 09/06/2023] [Accepted: 09/11/2023] [Indexed: 09/15/2023]
Abstract
A core-shell structured Pd@TS-1@meso-SiO2 catalyst with confined Pd nanometals has been fabricated by one-pot synthesis, impregnation method and sol-gel method. With the promotion of acid sites and protection of mesoporous silica shell, Pd@TS-1@meso-SiO2 shows higher activity than commercial comparison and higher stability than sample without mesoporous silica shell in the hydrogenation of nitrobenzene. The schematic illustration of the synergy effect is also proposed.
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Affiliation(s)
- Yi-Tian Wang
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing & International School of Materials Science and Engineering & School of Materials Science and Engineering & Shenzhen research institute of Wuhan University of Technology, School of Chemistry Chemical Engineering and Life Science, Wuhan University of Technology, Wuhan, 430071, P. R. China
| | - Si-Ming Wu
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing & International School of Materials Science and Engineering & School of Materials Science and Engineering & Shenzhen research institute of Wuhan University of Technology, School of Chemistry Chemical Engineering and Life Science, Wuhan University of Technology, Wuhan, 430071, P. R. China
| | - Guo-Qiang Luo
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing & International School of Materials Science and Engineering & School of Materials Science and Engineering & Shenzhen research institute of Wuhan University of Technology, School of Chemistry Chemical Engineering and Life Science, Wuhan University of Technology, Wuhan, 430071, P. R. China
| | - Shi-Tian Xiao
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing & International School of Materials Science and Engineering & School of Materials Science and Engineering & Shenzhen research institute of Wuhan University of Technology, School of Chemistry Chemical Engineering and Life Science, Wuhan University of Technology, Wuhan, 430071, P. R. China
| | - Fu-Fei Pu
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing & International School of Materials Science and Engineering & School of Materials Science and Engineering & Shenzhen research institute of Wuhan University of Technology, School of Chemistry Chemical Engineering and Life Science, Wuhan University of Technology, Wuhan, 430071, P. R. China
| | - Li-Ying Wang
- Department State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, National Center for Magnetic Resonance in Wuhan, Wuhan Institute of Physics and Mathematics, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan, 430071, P. R. China
| | - Gang-Gang Chang
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing & International School of Materials Science and Engineering & School of Materials Science and Engineering & Shenzhen research institute of Wuhan University of Technology, School of Chemistry Chemical Engineering and Life Science, Wuhan University of Technology, Wuhan, 430071, P. R. China
| | - Ge Tian
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing & International School of Materials Science and Engineering & School of Materials Science and Engineering & Shenzhen research institute of Wuhan University of Technology, School of Chemistry Chemical Engineering and Life Science, Wuhan University of Technology, Wuhan, 430071, P. R. China
| | - Xiao-Yu Yang
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing & International School of Materials Science and Engineering & School of Materials Science and Engineering & Shenzhen research institute of Wuhan University of Technology, School of Chemistry Chemical Engineering and Life Science, Wuhan University of Technology, Wuhan, 430071, P. R. China
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