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40 results on '"Xia, Shengpeng"'

15. Advances in Oxidative Coupling of Methane

Author

Deng, Jinlin, primary, Chen, Peili, additional, Xia, Shengpeng, additional, Zheng, Min, additional, Song, Da, additional, Lin, Yan, additional, Liu, Anqi, additional, Wang, Xiaobo, additional, Zhao, Kun, additional, and Zheng, Anqing, additional

Published
2023
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32. Integrating molecular rigidity and chirality into thermally activated delayed fluorescence emitters for highly efficient sky-blue and orange circularly polarized electroluminescence

Author

Ni, Fan, primary, Huang, Chih-Wei, additional, Tang, Yukun, additional, Chen, Zhanxiang, additional, Wu, Yaxun, additional, Xia, Shengpeng, additional, Cao, Xiaosong, additional, Hsu, Jung-Hsien, additional, Lee, Wei-Kai, additional, Zheng, Kailu, additional, Huang, Zhongyan, additional, Wu, Chung-Chih, additional, and Yang, Chuluo, additional

Published
2021
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37. Photosynthetic Polymer Dots–Bacteria Biohybrid System Based on Transmembrane Electron Transport for Fixing CO2into Poly-3-hydroxybutyrate

Author

Yu, Wen, Pavliuk, Mariia V., Liu, Aijie, Zeng, Yue, Xia, Shengpeng, Huang, Yiming, Bai, Haotian, Lv, Fengting, Tian, Haining, and Wang, Shu

Abstract

Organic semiconductor–microbial photosynthetic biohybrid systems show great potential in light-driven biosynthesis. In such a system, an organic semiconductor is used to harvest solar energy and generate electrons, which can be further transported to microorganisms with a wide range of metabolic pathways for final biosynthesis. However, the lack of direct electron transport proteins in existing microorganisms hinders the hybrid system of photosynthesis. In this work, we have designed a photosynthetic biohybrid system based on transmembrane electron transport that can effectively deliver the electrons from organic semiconductor across the cell wall to the microbe. Biocompatible organic semiconductor polymer dots (Pdots) are used as photosensitizers to construct a ternary synergistic biochemical factory in collaboration with Ralstonia eutrophaH16(RH16) and electron shuttle neutral red (NR). Photogenerated electrons from Pdots promote the proportion of nicotinamide adenine dinucleotide phosphate (NADPH) through NR, driving the Calvin cycle of RH16to convert CO2into poly-3-hydroxybutyrate (PHB), with a yield of 21.3 ± 3.78 mg/L, almost 3 times higher than that of original RH16. This work provides a concept of an integrated photoactive biological factory based on organic semiconductor polymer dots/bacteria for valuable chemical production only using solar energy as the energy input.

Published
2022
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38. Increased Nitrogenase Activity in Solar-Driven Biohybrids Containing Non-photosynthetic Bacteria and Conducting Polymers.

Author

Zeng Y, Bai H, Yu W, Xia S, Shen Q, Huang Y, Lv F, Bazan GC, and Wang S

Subjects
Molybdoferredoxin metabolism, Iron metabolism, Oxidation-Reduction, Nitrogenase metabolism, Nitrogen Fixation
Abstract

A conductive polymer-based photosynthetic biohybrid is constructed to enhance biological nitrogen fixation by increasing nitrogenase activity in the non-photosynthetic bacterium Azotobacter Chroococcum (A. Chroococcum). The light-harvesting cationic poly(fluorene-alt-phenylene) (PFP) electrostatically binds to the surface of the bacteria and possesses satisfactory conductivity to facilitate electron transfer to the bacterium, promoting the nitrogen fixation pathway through redox proteins on the surface of the bacteria when under illumination. Therefore, the nitrogenase activity, hydrogen, NH 4 + -N and L-amino acids production are increased by 260 %, 37 %, 44 %, and 47 %, respectively. The expression levels of nifD and nifK encoding molybdenum-iron (MoFe) protein and relevant nitrogen-fixing proteins are up-regulated. These photoactive conductive polymer-bacteria biohybrids provide a new method for improving the biological nitrogen fixation capability of non-photosynthetic nitrogen-fixing bacteria., (© 2023 Wiley-VCH GmbH.)

Published
2023
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39. Photosynthetic Polymer Dots-Bacteria Biohybrid System Based on Transmembrane Electron Transport for Fixing CO 2 into Poly-3-hydroxybutyrate.

Author

Yu W, Pavliuk MV, Liu A, Zeng Y, Xia S, Huang Y, Bai H, Lv F, Tian H, and Wang S

Subjects
Electron Transport, Polymers metabolism, Photosynthesis, Polyesters metabolism, Bacteria metabolism, Gram-Negative Bacteria, Carbon Dioxide chemistry, Electrons
Abstract

Organic semiconductor-microbial photosynthetic biohybrid systems show great potential in light-driven biosynthesis. In such a system, an organic semiconductor is used to harvest solar energy and generate electrons, which can be further transported to microorganisms with a wide range of metabolic pathways for final biosynthesis. However, the lack of direct electron transport proteins in existing microorganisms hinders the hybrid system of photosynthesis. In this work, we have designed a photosynthetic biohybrid system based on transmembrane electron transport that can effectively deliver the electrons from organic semiconductor across the cell wall to the microbe. Biocompatible organic semiconductor polymer dots (Pdots) are used as photosensitizers to construct a ternary synergistic biochemical factory in collaboration with Ralstonia eutropha H16 ( RH16 ) and electron shuttle neutral red (NR). Photogenerated electrons from Pdots promote the proportion of nicotinamide adenine dinucleotide phosphate (NADPH) through NR, driving the Calvin cycle of RH16 to convert CO 2 into poly-3-hydroxybutyrate (PHB), with a yield of 21.3 ± 3.78 mg/L, almost 3 times higher than that of original RH16 . This work provides a concept of an integrated photoactive biological factory based on organic semiconductor polymer dots/bacteria for valuable chemical production only using solar energy as the energy input.

Published
2023
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40. 9,9'-Bifluorenylidene-Core Perylene Diimide Acceptors for As-Cast Non-Fullerene Organic Solar Cells: The Isomeric Effect on Optoelectronic Properties.

Author

Zhao Y, Wang H, Xia S, Zhou F, Luo Z, Luo J, He F, and Yang C

Abstract

Two different non-fullerene small-molecule acceptors, m-PIB and p-PIB, based on 9,9'-bifluorenylidene (BF) and perylene diimide (PDI) were designed and synthesized. Four β-substituted PDIs were linked to BF in different positions. Based on DFT analysis, derivative p-PIB exhibited reduced intramolecular twisting between the PDI moieties, more delocalized wave function, and sufficiently wider π-electron delocalization than that of m-PIB. The absorption ability of p-PIB was enhanced due to increased intermolecular interactions. By blending p-PIB with poly{4,8-bis[5-(2ethylhexyl)thiophen-2-yl]benzo[1,2-b:4,5-b']dithiophene-co-3-fluorothieno[3,4-b]-thiophene-2-carboxylate} (PTB7-Th), organic solar cells (OSCs) based on p-PIB obtained a maximum power conversion efficiency of 5.95 % without any treatments. Due to the improved and balanced hole and electron mobilities, the short-circuit current and fill factor of OSCs based on PTB7-Th and p-PIB were significantly increased. The AFM and TEM results revealed that the PTB7-Th:p-PIB film had favorable nanoscale phase separation and formed a bicontinuous interpenetrating network., (© 2018 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.)

Published
2018
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