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Highly selective detection of copper(II) by a “ligand-free” conjugated copolymer in nucleophilic solvents

Weixing Deng, Pengfei Sun, Quli Fan, Lei Zhang, Tsuyoshi Minami

Frontiers of Chemical Science and Engineering 2020, Volume 14, Issue 1,   Pages 105-111 doi: 10.1007/s11705-019-1791-6

Abstract: observed at low temperature suggests that the quenching and reducing mechanism is most probably due to a photo-inducedelectron transfer from excited PFPNCC to Cu(II).

Keywords： ligand-free     fluorescent chemosensor     copper     photo-induced electron transfer    

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Synthesis, spectroscopic, and electrochemical properties of two dyads consisted of tetrathiafulvalene and carbazole

Guoqiao LAI, Yibo LIU, Meijiang LI, Yongjia SHEN

Frontiers of Chemical Science and Engineering 2009, Volume 3, Issue 2,   Pages 192-195 doi: 10.1007/s11705-009-0015-x

Abstract: They showed negligible intramolecular charge-transfer interaction in their ground states as indicatedCompared with carbazole, their fluorescence was strongly quenched, which implied that a photo inducedelectron transfer (PET) interaction between TTF and carbazole moieties occurred.

Keywords： donor-σ-acceptor molecule     intramolecular charge transfer interaction     photo induced electron transfer    

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Photo-induced surface frustrated Lewis pairs for promoted photocatalytic decomposition of perfluorooctanoic

Frontiers of Environmental Science & Engineering 2023, Volume 17, Issue 1, doi: 10.1007/s11783-023-1603-6

Abstract:

● Terminal carboxylate group activation is PFOA degradation’s rate-limiting step.

Keywords： Heterogeneous photocatalysis     Surface frustrated Lewis pairs     Perfluorooctanoic acid     Defluorination efficiency     Environmental remediation    

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Review: Tip-based vibrational spectroscopy for nanoscale analysis of emerging energy materials

Amun JARZEMBSKI, Cedric SHASKEY, Keunhan PARK

Frontiers in Energy 2018, Volume 12, Issue 1,   Pages 43-71 doi: 10.1007/s11708-018-0524-8

Abstract: For example, photothermal induced resonance (PTIR) spectroscopy methods measure a sample’s local thermalMore recently, photo-induced force microscopy (PiFM) has been developed to measure the change of the

Keywords： vibrational spectroscopy     atomic force microscopy     photo-thermal induced resonance     scanning near-fieldoptical microscopy     tip-enhanced Raman spectroscopy     photo-induced force microscopy     molecular resonances    

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Insights into the electron transfer mechanisms of permanganate activation by carbon nanotube membrane

Frontiers of Environmental Science & Engineering 2023, Volume 17, Issue 9, doi: 10.1007/s11783-023-1706-0

Abstract: ListItem>

● A CNT filter enabled effective KMnO4 activation via facilitated electrontransfer.

Keywords： KMnO4     Carbon nanotubes     Non-radical pathway     Electron transfer     Water treatment    

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precise-acting” strategies for improving anaerobic methanogenesis of organic waste: Insights from the electrontransfer system of syntrophic partners

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 6, doi: 10.1007/s11783-021-1508-1

Abstract: Further, we discussed our opinion of methanogenesis process with insights from the electron transfersystem of syntrophic partners and provided potential targeted enhancing strategy for high-efficiency electrontransfer system.

Keywords： Methanogenesis     Anaerobic digestion     Enhancing strategy     Electron transfer     Organic waste    

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Potential of electron transfer and its application in dictating routes of biochemical processes associated

Frontiers of Medicine 2021, Volume 15, Issue 5,   Pages 679-692 doi: 10.1007/s11684-021-0866-1

Abstract: the degree of reduction of a compound, we have recently proposed a calculation termed as potential of electrontransfer (PET), which is used to characterize the degree of electron redistribution coupled with metabolicWhen this calculation is combined with the assumed model of electron balance in a cellular context, theEnabling electron transfer could drive metabolic reprogramming in cancer metabolism.Therefore, the concept and model established on electron transfer could guide the treatment strategies

Keywords： metabolic reprogramming     potential of electron transfer     cell proliferation     aerobic glycolysis     cancer    

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Mechanisms behind the accelerated extracellular electron transfer in

Feng ZHANG,Shengsong YU,Jie LI,Wenwei LI,Hanqing YU

Frontiers of Environmental Science & Engineering 2016, Volume 10, Issue 3,   Pages 531-538 doi: 10.1007/s11783-015-0793-y

Abstract: self-assembled monolayers (SAMs) has been found to be an effective approach to improve the extracellular electrontransfer (EET) of electrochemically active bacteria (EAB) on electrode surface, but the underlying mechanism

Keywords： biofilm     extracellular electron transfer (EET)     Geobacter sulfurreducens DL-1     gold     self-assembled    

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Hypoxia-induced activity loss of a photo-responsive microtubule inhibitor azobenzene combretastatin A4

Yang An, Chao Chen, Jundong Zhu, Pankaj Dwivedi, Yanjun Zhao, Zheng Wang

Frontiers of Chemical Science and Engineering 2020, Volume 14, Issue 5,   Pages 880-888 doi: 10.1007/s11705-019-1864-6

Abstract: The conformation-dependent activity of azobenzene combretastatin A4 (Azo-CA4) provides a unique approach to reduce the side-effects of chemotherapy, due to the light-triggered conformation transition of its azobenzene moiety. Under hypoxic tumor microenvironment, however, the high expression of azoreductase can reduce azobenzene to aniline. It was postulated that the Azo-CA4 might be degraded under hypoxia, resulting in the decrease of its anti-tumor activity. The aim of this study was to verify such hypothesis in HeLa cells . The quantitative drug concentration analysis shows the ratiometric formation of degradation end-products, confirming the bioreduction of Azo-CA4. The tubulin staining study indicates that Azo-CA4 loses the potency of switching off microtubule dynamics under hypoxia. Furthermore, the cell cycle analysis shows that the ability of Azo-CA4 to induce mitotic arrest is lost at low oxygen content. Therefore, the cytotoxicity of Azo-CA4 is compromised under hypoxia. In contrast, combretastatin A4 as a positive control maintains the potency to inhibit tubulin polymerization and break down the nuclei irrespective of light irradiation and oxygen level. This work highlights the influence of hypoxic tumor microenvironment on the anti-tumor potency of Azo-CA4, which should be considered during the early stage of designing translational Azo-CA4 delivery systems.

Keywords： hypoxia     microtubule inhibitor     drug delivery     azo-combretastatin A4     photo-responsive    

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In situ electron-induced reduction of NO

Weixuan Zhao, Liping Lian, Xingpeng Jin, Renxi Zhang, Gang Luo, Huiqi Hou, Shanping Chen, Ruina Zhang

Frontiers of Environmental Science & Engineering 2020, Volume 14, Issue 2, doi: 10.1007/s11783-019-1199-z

Abstract: • An in situ electron-induced deNOx process with CNT activated by DBD was achieved. • Carbon atomsIn this study, a new in situ electron-induced process is presented with carbon nanotubes (CNTs) as aX-ray photoelectron spectroscopy (XPS) and scanning electron microscopy (SEM) were utilized to investigate
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Simultaneous Feammox and anammox process facilitated by activated carbon as an electron shuttle for autotrophic

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 7, doi: 10.1007/s11783-021-1498-z

Abstract:

• The autotrophic nitrogen removal combining Feammox and Anammox was achieved.

Keywords： Feammox     Anammox     Extracellular electron transfer     Electron shuttle     Activated carbon    

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4-Amino-1,8-naphthalimide based fluorescent photoinduced electron transfer (PET) pH sensors as liposomal

Miguel Martínez-Calvo, Sandra A. Bright, Emma B. Veale, Adam F. Henwood, D. Clive Williams, Thorfinnur Gunnlaugsson

Frontiers of Chemical Science and Engineering 2020, Volume 14, Issue 1,   Pages 61-75 doi: 10.1007/s11705-019-1862-8

Abstract: Four new fluorescent sensors ( - ) based on the 4-amino-1,8-naphthalimide fluorophores ( ) have been synthesized based on the classical fluorophore-spacer-receptor model. These four compounds all gave rise to emission bands centred at 535 nm, which were found to be highly pH dependent, the emission being ‘switched on’ in acidic media, while being quenched due to PET from the amino moieties to the excited state of the at more alkaline pH. The luminescent pH dependence for these probes was found to be highly dependent on the substitution on the imide site, as well as the polyamine chain attached to the position 4-amino moiety. In the case of sensor the presence of the 4-amino-aniline dominated the pH dependent quenching. Nevertheless, at higher pH, PET quenching was also found to occur from the polyamine site. Hence, is better described as a receptor -spacer -fluorophore-spacer -receptor system, where the dominant PET process is due to (normally less favourable) ‘directional’ PET quenching from the 4-amino-aniline unit to the site. Similar trends and pH fluorescence dependences were also seen for and . These compounds were also tested for their imaging potential and toxicity against HeLa cells (using DRAQ5 as nuclear stain which does now show pH dependent changes in acidic and neutral pH) and the results demonstrated that these compounds have reduced cellular viability at moderately high concentrations (with IC values between ca. 8‒30 µmol∙L ), but were found to be suitable for intracellular pH determination at 1 µmol∙L concentrations, where no real toxicity was observed. This allowed us to employ these as lysosomal probes at sub-toxic concentrations, where the based emission was found to be pH depended, mirroring that seen in aqueous solution for , with the main fluorescence changes occurring within acidic to neutral pH.

Keywords： sensors     pH     photoinduced electron transfer     cellular imaging     confocal microscopy    

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Sulfur cycle as an electron mediator between carbon and nitrate in a constructed wetland microcosm

Wenrui Guo, Yue Wen, Yi Chen, Qi Zhou

Frontiers of Environmental Science & Engineering 2020, Volume 14, Issue 4, doi: 10.1007/s11783-020-1236-y

Abstract: . • A conceptual model involving electron acceptance, storage, and donation was built. • S cycle transferredA constructed wetland microcosm was employed to investigate the sulfur cycle-mediated electron transferat the average rate of 0.84 mol/(m3·d) through sulfate reduction, which accounted for 20.0% of the electronThe overall electron transfer efficiency of the sulfur cycle for autotrophic denitrification was 15.3%These results improved understanding of electron transfers among carbon, nitrogen, and sulfur cycles

Keywords： Constructed wetland     Sulfur cycle     Electron transfer     Denitrification    

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Cyanobacterial photo-driven mixotrophic metabolism and its advantages for biosynthesis

Ni Wan,Mary Abernathy,Joseph Kuo-Hsiang Tang,Yinjie J. Tang,Le You

Frontiers of Chemical Science and Engineering 2015, Volume 9, Issue 3,   Pages 308-316 doi: 10.1007/s11705-015-1521-7

Abstract: Third, CO mass transfer and light supply are deficient within large photobioreactors.The photo-fermentations show enhanced photosynthesis, while CO loss from organic substrate degradationThe use of cyanobacteria as “green ” could be a promising route to develop robust photo-biorefineries

Keywords： CO2 mass transfer     N2 fixation     photosystem     RuBisCO     the TCA cycle    

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Experimental and computational assessment of 1,4-Dioxane degradation in a photo-Fenton reactive ceramic

Frontiers of Environmental Science & Engineering 2021, Volume 15, Issue 5, doi: 10.1007/s11783-020-1341-y

Abstract:

• 1,4-Dioxane was degraded via the photo-Fenton reactive membrane filtration

Keywords： Photo-Fenton     Ceramic membrane     1     4-Dioxane     Goethite    

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Title Author Date Type Operation

Highly selective detection of copper(II) by a “ligand-free” conjugated copolymer in nucleophilic solvents

Weixing Deng, Pengfei Sun, Quli Fan, Lei Zhang, Tsuyoshi Minami

Journal Article

Synthesis, spectroscopic, and electrochemical properties of two dyads consisted of tetrathiafulvalene and carbazole

Guoqiao LAI, Yibo LIU, Meijiang LI, Yongjia SHEN

Journal Article

Photo-induced surface frustrated Lewis pairs for promoted photocatalytic decomposition of perfluorooctanoic

Journal Article

Review: Tip-based vibrational spectroscopy for nanoscale analysis of emerging energy materials

Amun JARZEMBSKI, Cedric SHASKEY, Keunhan PARK

Journal Article

Insights into the electron transfer mechanisms of permanganate activation by carbon nanotube membrane

Journal Article

precise-acting” strategies for improving anaerobic methanogenesis of organic waste: Insights from the electrontransfer system of syntrophic partners

Journal Article

Potential of electron transfer and its application in dictating routes of biochemical processes associated

Journal Article

Mechanisms behind the accelerated extracellular electron transfer in

Feng ZHANG,Shengsong YU,Jie LI,Wenwei LI,Hanqing YU

Journal Article

Hypoxia-induced activity loss of a photo-responsive microtubule inhibitor azobenzene combretastatin A4

Yang An, Chao Chen, Jundong Zhu, Pankaj Dwivedi, Yanjun Zhao, Zheng Wang

Journal Article

In situ electron-induced reduction of NO

Weixuan Zhao, Liping Lian, Xingpeng Jin, Renxi Zhang, Gang Luo, Huiqi Hou, Shanping Chen, Ruina Zhang

Journal Article

Simultaneous Feammox and anammox process facilitated by activated carbon as an electron shuttle for autotrophic

Journal Article

4-Amino-1,8-naphthalimide based fluorescent photoinduced electron transfer (PET) pH sensors as liposomal

Miguel Martínez-Calvo, Sandra A. Bright, Emma B. Veale, Adam F. Henwood, D. Clive Williams, Thorfinnur Gunnlaugsson

Journal Article

Sulfur cycle as an electron mediator between carbon and nitrate in a constructed wetland microcosm

Wenrui Guo, Yue Wen, Yi Chen, Qi Zhou

Journal Article

Cyanobacterial photo-driven mixotrophic metabolism and its advantages for biosynthesis

Ni Wan,Mary Abernathy,Joseph Kuo-Hsiang Tang,Yinjie J. Tang,Le You

Journal Article

Experimental and computational assessment of 1,4-Dioxane degradation in a photo-Fenton reactive ceramic

Journal Article