Jing Wen

Wuhan Institute of Technology

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Wenling Gu

Central China Normal University

Chengzhou Zhu

Central China Normal University

Liuyong Hu

Wuhan Institute of Technology

Zhitian Liu

Wuhan Institute of Technology

Haibo Ma

Qingdao University

Xiang Gao

Wuhan Institute of Technology

Lei Jiao

Shaanxi Normal University

Ying Qin

Shenyang University of Chemical Technology

Mingwang Liu

Central China Normal University

Lirong Zheng

Institute of High Energy Physics

Cooperative Institutions

Chinese Academy of Sciences

Nanjing University

Wuhan Institute of Technology

University of Chinese Academy of Sciences

Central China Normal University

Huazhong University of Science and Technology

Tsinghua University

Shanghai Jiao Tong University

South China University of Technology

Collaborative Innovation Center of Advanced Microstructures

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Simultaneous Noncovalent Modification and Exfoliation of 2D Carbon Nitride for Enhanced Electrochemiluminescent Biosensing

Journal of the American Chemical Society (2017)

Jingjing Ji Jing Wen Yanfei Shen Yanqin Lv Yile Chen

As an emerging nitrogen-rich 2D carbon material, graphitic carbon nitride (CN) has drawn much attention for applications ranging from photo-/electrocatalysts to biosensors. Interfacial modification of CN is fundamentally vital but is still in its infancy and remains challenging due to the low reactivity of CN. Here we report that, in conjunction with a π-π stacking interaction, bulk CN could be simultaneously exfoliated via facile mechanical grinding. The obtained CN nanosheets (m-CNNS) not only retained the pristine optoelectronic properties of bulk CN but also enriched a friendly interface for further coupling biomolecules with advanced properties, overcoming the deficiencies of CN in surface science. The m-CNNS were further covalently linked to a DNA probe, and the resultant electrochemiluminescent biosensor for the target DNA exhibited much enhanced sensitivity with respect to that obtained by direct physical absorption of the DNA probe on unmodified CNNS. This noncovalent exfoliation and interfacial modification should greatly expand the scope of potential applications of CN in areas such as biosensing and should also be applicable to other 2D materials in interface modulation.

Biomolecule

Exfoliation joint

Carbon nitride

Graphitic carbon nitride

Surface Modification

Carbon fibers

10.1021/jacs.7b06708

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Citations (266)

Visible Light-Driven Self-Heating Photocatalytic Decarboxylation of Fatty Acid Over Α-Fe2o3

Chunlin Hao Jing Wen Hongxuan Song Bo Huang Guibao Guo

Here we report a temperature-dependent strategy to achieve high-efficiency photocatalytic long-chain fatty acids decarboxylation to Cn-1 n-alkanes, e.g., ~0.5 M for stearic acid to n-heptadecane in a single operation with ~91% selectivity, far beyond no more than mM limit capacities of conventional photocatalysis. Through the use of high boiling-point n-alkane solvents for getting the best self-heating based on the photothermal conversion effect of α-Fe2O3, i.e., high temperature, which could force the standing C-chain at low temperature down onto the α-Fe2O3 surface for energy-storing, allowing photo-induced hole-electron pairs to readily approach and react with the more strained C-COO- bonds. And a consumption of photogenerated electrons can be shift from conventional PCET of photo-Koble reaction into step-wise pathway to form more favorable carbanion intermediate that reacting with H+ into RH is accelerated with lifting the temperature. Our work offers a practical approach to upgrade photocatalytic decarboxylation by a convenient photo-to-heat route.

Decarboxylation

Visible spectrum

10.2139/ssrn.4666166

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Photoelectric effect experimental apparatus

Physics Experimentation (2002)

Jing Wen

Aiming at the deficiency of traditional photoelectric effect experimental apparatus, a new type of photoelectric effect experimental apparatus is designed and developed. The apparatus can not only test the basic law of the photoelectric effect, but also determine Planck constant accurately.

Photoelectric effect

Constant (computer programming)

Source

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Analysis and design of a self-oscillating bidirectionally saturated fluxgate current sensor

Measurement (2020)

Xiaoguang Yang Jing Wen Meiqi Chen Zheng Gao Ligen Xi

Fluxgate compass

Current sensor

10.1016/j.measurement.2020.107687

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Citations (6)

Single Molecule Study of Force-Induced Rotation of Carbon–Carbon Double Bonds in Polymers

ACS Nano (2016)

Wenmao Huang Zhenshu Zhu Jing Wen Xin Wang Meng Qin

Carbon-carbon double bonds (C═C) are ubiquitous in natural and synthetic polymers. In bulk studies, due to limited ways to control applied force, they are thought to be mechanically inert and not to contribute to the extensibility of polymers. Here, we report a single molecule force spectroscopy study on a polymer containing C═C bonds using atomic force microscope. Surprisingly, we found that it is possible to directly observe the cis-to-trans isomerization of C═C bonds at the time scale of ∼1 ms at room temperature by applying a tensile force ∼1.7 nN. The reaction proceeds through a diradical intermediate state, as confirmed by both a free radical quenching experiment and quantum chemical modeling. The force-free activation length to convert the cis C═C bonds to the transition state is ∼0.5 Å, indicating that the reaction rate is accelerated by ∼109 times at the transition force. On the basis of the density functional theory optimized structure, we propose that because the pulling direction is not parallel to C═C double bonds in the polymer, stretching the polymer not only provides tension to lower the transition barrier but also provides torsion to facilitate the rotation of cis C═C bonds. This explains the apparently low transition force for such thermally "forbidden" reactions and offers an additional explanation of the "lever-arm effect" of polymer backbones on the activation force for many mechanophores. This work demonstrates the importance of precisely controlling the force direction at the nanoscale to the force-activated reactions and may have many implications on the design of stress-responsive materials.

Force Spectroscopy

10.1021/acsnano.6b07119

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Citations (43)

ChemInform Abstract: Rhodium(III)‐Catalyzed Directed ortho‐C—H Bond Functionalization of Aromatic Ketazines via C—S and C—C Coupling.

ChemInform (2016)

Jing Wen An Wu Mingyang Wang Jin Zhu

Abstract Sulfuration and olefination of aromatic ketazines are achieved by rhodium‐catalyzed oxidative C‐H bond activation.

Surface Modification

10.1002/chin.201611086

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Heterophase junction engineering-induced Co spin-state modulation of CoSe2 for large-current hydrogen evolution reaction

Rare Metals (2024)

Baochai Xu Yaping Miao Minqin Mao Donglian Li Song Xie

Modulation (music)

Spin states

10.1007/s12598-024-02624-w

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Citations (12)

Chlorinated Wide-Bandgap Donor Polymer Enabling Annealing Free Nonfullerene Solar Cells with the Efficiency of 11.5%

The Journal of Physical Chemistry Letters (2018)

Zhitian Liu Yerun Gao Jun Dong Minlang Yang Ming Liu

Substituting the hydrogen atoms on the conjugated side chain of a wide-bandgap polymer J52 with chlorine atoms can simultaneously increase the Jsc, Voc, and FF of nonfullerene OSCs, leading to an efficiency boost from 3.78 to 11.53%, which is among the highest efficiencies for as-cast OSCs reported to date. To illustrate the impressive 3-fold PCE enhancement, the chlorination effect on the optical properties and energy levels of polymers, film morphology, and underlying charge dynamics is systematically investigated. Grazing incidence wide-angle X-ray scattering studies show that chlorinated J52-2Cl exhibits strong molecule aggregation, the preferred face-on orientation, and enhanced intermolecular π–π interactions, hence increasing the charge carrier mobility by 1 order of magnitude. Moreover, chlorination modifies the miscibility between the donor and acceptor and consequently optimizes the phase separation morphology of J52-2Cl:ITIC blend films. These results highlight chlorination as a promising approach to achieve highly efficient as-cast OSCs without any extra treatment.

Acceptor

Miscibility

Charge carrier

10.1021/acs.jpclett.8b03247

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Citations (74)

<i>Ab Initio</i> Study on Ta:SnO<sub>2</sub>

Advanced materials research (2010)

Guo Qiang Qin Guang Lei Zhang Shimin Liu Hua Fu Jing Wen

The structural, electronic and optical properties of a tantalum doped rutile-phased stannic oxide were investigated by ab initio calculations. The Ta dopant doesn’t change the lattice symmetry of rutile phase, but brings about a smaller volume expansion comparing with Sb:SnO2, a increase in thermal stability, a semiconductor-metal transition in electronic structure and a red shift in the optical spectrum. The intra-band excitation caused by Ta dopant leads to to a remarkable enhancement of optical peaks in the infrared region, while the stability of optical spectrum in the visible light region supports the preservation of high visible transparency of Ta:SnO2 with dopant concentration as high as 4.17 at.%.

Rutile

10.4028/www.scientific.net/amr.160-162.574

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Citations (1)

Evolution of protein concentration in the rat lens after in vivo exposure to close‐to‐threshold dose ultraviolet radiation

Acta Ophthalmologica (2011)

Jing Wen J ZHANG Stefan Löfgren Konstantin Galichanin N ZALEBIZADEH

Abstract Purpose To investigate the short term cataract development and protein concentration in the rat lens after in vivo close‐to‐threshold dose exposure to ultraviolet radiation (UVR) around 300 nm. Methods Three groups of 10 Sprague Dawley rats were unilaterally exposed to 8 kJ/m2 UVR‐300 nm for 15 minutes, and a forth group of 10 rats was kept without UVR exposure as non‐exposed control animals. The exposed animals were sacrificed at 1, 3 and 7 days after exposure. Both lenses from all animals were extracted and photographed and the intensity of forward light scattering was measured quantitatively. Whole lens was homogenized and protein concentration was determined spectrophotometrically. Results All exposed lenses developed cataract. Lens light scattering increased throughout 7 days after UVR exposure. The difference of protein concentration between exposed lens and contralateral non‐exposed lens was slightly decreased at 1 day after exposure and then gradually normalized back to baseline within 7 day after exposure. Conclusion The in vivo close‐to‐threshold dose UVR induced cataract and protein changes are not paralleled. The altered protein concentration is normalized within 7 days after ultraviolet irradiation.

Ultraviolet

Eye lens

10.1111/j.1755-3768.2011.245.x

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