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NiPt nanoparticles supported on CeO_2 nanospheres for efficient catalytic hydrogen generation from alkaline solution of hydrazine

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Chinese Chemical Letters 2019年第3期30卷 634-637页

作者： Yana Men Jun Su Xiangli Wang Ping Cai Gongzhen Cheng Wei Luo College of Chemistry and Molecular Sciences Wuhan University wuhan National Laboratory for Optoelectronics Huazhong University of Science and Technology No.1 Middle School Affiliated to Central China Normal university

Searching for highly efficient catalysts toward dehydrogenation of hydrazine for chemical hydrogen storage is highly desirable for the development of hydrogen economy. Herein, we report a simple in situ co-reduction synthesis of NiPt nanoparticles supported on CeO_2 nanospheres and their superior catalytic performance for hydrogen generation from alkaline solution of hydrazine at room temperature. Thanks to the strong electronic interaction arising from synergistic effect at atomic lever and support-metal interaction between NiPt and CeO_*** obtained Ni_5Pt_5-CeO_2 catalyst exhibits 100% hydrogen selectivity and superior catalytic performance for hydrogen generation from alkaline solution of hydrazine at room temperature, with a TOF value of 416 h 1.

关键词： Hydrogen storage Hydrazine Hydrogen evolution CeO2 nanospheres Support-metal in teraction

Three-dimensional nitrogen-doped graphene hydrogel supported Co-CeOx nanoclusters as efficient catalysts for hydrogen generation from hydrolysis of ammonia borane

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Chinese Chemical Letters 2018年第11期29卷 1671-1674页

作者： Yana Men Jun Su Chaozhang Huang Lijing Liang Ping Cai Gongzhen Cheng Wei Luo College of Chemistry and Molecular Sciences. wuhan university Wuhon 430072 China wuhan National Laboratory for Optoelectronics Huazhong University of Science and Technology Wuhan 430074 China Technical Center of Fujian Tobacco Industrial Co. Ltd. Xiamen 361022 China

The development of highly active noble-metal-flee catalysts for catalytic hydrolysis of ammonia borane is mandatory for its application in hydrogen storage. Herein, Co-CeOx nanoclusters have been successfully anchored on a three-dimensional nitrogen-doped graphene hydrogel （NGH） by a simple coreduction method and further used as efficient catalysts to catalytic hydrolysis of ammonia borane at room temperature. Thanks to the strong synergistic electronic effect between Co and CeOx, as well as the strong metal-support interaction between Co-CeOx and 3D NGH, the as-synthesized Co-（CeOx）0.91/NGH catalyst exhibits superior catalytic activity toward hydrolysis of ammonia borane, with the turnover frequency （TOF） value of 79.5 min 1, which is almost 13 times higher than that of Co]NGH, and higher than most of the reported noble-metal-free catalysts.

关键词： Nitrogen-doped graphene hydrogel Co-CeOx Hydrogen storage Ammonia borane Noble-metal-free

Chiral supramolecular 2D halogen-bonded organic frameworks constructed by post-synthetic modified cross-linking strategy

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Science China Chemistry 2023年第11期66卷 3169-3177页

作者： Ning Xia Jiahao Zhao Guanfei Gong Hongqiang Dong Haohu Li Jike Wang Lu Wang Shigui Chen The Institute for Advanced Studies Wuhan UniversityWuhan 430072China School of Materials Science and Engineering Hubei University of Automotive TechnologyShiyan 442002China

The development of preparation methods for XOFs,as a new class of organic frameworks,plays a crucial role in shaping their structures,functions,and potential *** this study,we presented the construction of chiral supramolecular 2D halogen-bonded organic frameworks(XOFs)through a post-synthetic modification strategy.A linear halogen-bonded organic polymer(XOP),XOP-DPBA,decorated with aldehyde groups,was initially prepared to validate the feasibility of post-synthetic modification for XOF construction and ***-DPBA exhibited excellent reactivity with amines,forming imine *** utilizing this reactivity,a series of cross-linked 2D XOFs were efficiently prepared through post-synthetic modified cross-linking ***,we successfully introduced chiralα/β-cyclodextrins(α/β-CD)into the XOF skeletons via host-guest interactions,resulting in the fabrication of chiral supramolecular 2D *** chiral XOFs displayed the induced circular dichroism(ICD)signals and assembled them into helical *** post-synthetic modification strategy demonstrated its versatility and simplicity for the construction and functionalization of XOFs.

关键词： supramolecular halogen-bonded organic frameworks [N···I~+···N]halogen bond post-synthetic modification supramolecular self-assembly chirality induction

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Systematic investigation of bioorthogonal cellular DNA metabolic labeling in a photo-controlled manner

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Chinese Chemical Letters 2020年第5期31卷 1104-1108页

作者： Shaokang Jia Shixi Yang Huimin Ji Shuang Peng Kun Chen Zhiyong He Xiang Zhou College of Chemistry and Molecular Sciences Key Laboratory of Biomedical Polymers of Ministry of EducationWuhan UniversityWuhan 430072China

Bioorthogonal cleavage and ligation reactions together form one more integrated system about the repertoire of bioorthogonal chemistry,capacitating an array of thrilling new biological *** bond-cleavage type and position of biomolecular remain a great challenge,which determines the metabolic pathway of the targets in living *** we designed two linkages of methylene and carbonyl group attached the N-3 position of the 5-ethynyl-2’-deoxyuridine(EdU)base or the oxygen atom at deoxyribose 3’position to a photocaging group,which would be cleaved by irradiation with 365 nm ultraviolet *** derivatives linked by methylene at the N-3 position had better photodecage efficiency and stability in the absence of *** paper provides a strategy for studying the nucleoside metabolic pathways in cells,which can easily and conveniently evaluate the effect of the position and type of the *** developed strategy affords a reference for controlling spatial and temporal metabolism of small-molecule drugs,allowing direct manipulation of intact cells under physiological conditions.

关键词： DNA metabolic labeling Bioorthogonal chemistry Photocage group Modified nucleoside Cell imaging

3D mesoporous rose-like nickel-iron selenide microspheres as advanced electrocatalysts for the oxygen evolution reaction

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Nano Research 2018年第4期11卷 2149-2158页

作者： Jiahao Yu Gongzhen Cheng Wei Luo College of Chemistry andMolecularSciences Wuhan University Wuhan 430072 China Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education) Nankai University Tianjin 300071 China

The development of efficient and stable non-noble metal-based electrocatalysts for the oxygen evolution reaction （OER） is one of the essential challenges for the upcoming hydrogen economy. Herein, three-dimensional （3D） mesoporous nickel iron selenide with rose-like microsphere architecture was directly grown on Ni foam via a successive two-step hydrotherrnal method. The unique 3D mesoporous rose-like morphology leads to a higher number of active sites as well as fast mass and electron transport through the entire electrode, and facilitates the release of 02 bubbles formed during the OER catalysis. As a result, the synthesized Ni0.76Fe0.24Se exhibits superior OER performances, with an ultralow overpotential of 197 mV needed to produce a current density of 10 ***-2 in 1 M KOH, outperforming all transition metal selenide OER catalysts reported to date.

关键词： transition metal selenide oxygen evolution reaction NiFeSe three-dimensional (3D) rose-like microspheres

Identification and quantification of the bioactive components in Osmanthus fragrans roots by HPLC-MS/MS

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Journal of Pharmaceutical Analysis 2021年第3期11卷 299-307页

作者： Xiaoyan Liao Yuan Hong Zilin Chen Key Laboratory of Combinatorial Biosynthesis and Drug Discovery Ministry of EducationHubei Province Engineering and Technology Research Center for Fluorinated PharmaceuticalsSchool of Pharmaceutical SciencesWuhan UniversityWuhan430071China State Key Laboratory of Transducer Technology Chinese Academy of SciencesBeijing100080China

The roots of O. fragrans are also a valuable resource in addition to its flowers and fruits. In this study, the HPLC-MS/MS method used for analyzing the chemical constituents in O. fragrans roots extract was developed, which showed high sensitivity for both qualitative and quantitative analyses. Thirty-two compounds were first discovered in O. fragrans roots, one compound of which was reported for the first time. The simultaneous determination method for acteoside, isoacteoside, oleuropein and phillyrin was validated to be sensitive and accurate. Then it was applied to determine the content of bioactive components in O. fragrans roots from different cultivars. The content of oleuropein and phillyrin in the twelve batches was relatively stable, while the content of acteoside and isoacteoside varied ***, the therapeutic material basis and mechanism of O. fragrans roots exerting its traditional pharmacodynamics were analyzed by network pharmacology. The results showed that O. fragrans roots might be effective for the treatment of inflammation, cardiovascular diseases, cancer, and rheumatoid arthritis, which is consistent with the traditional pharmacodynamics of O. fragrans roots. This work can provide an analytical method for the comprehensive development of O. fragrans roots.

关键词： Osmanthus fragrans roots HPLC-MS/MS Identification Quantitation Bioactive constituents Network pharmacology

Supramolecular nanoparticles constructed by orthogonal assembly of pillar[5]arene-cyclodextrin dimacrocycle for chemo-photodynamic combination therapy

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Chinese Chemical Letters 2023年第11期34卷 153-158页

作者： Yongfei Yin Penghao Sun Hongqiang Dong Yi Chen Shigui Chen Lu Wang The Institute for Advanced Studies Wuhan UniversityWuhan 430072China

Chemotherapy combined with photodynamic therapy has emerged as a promising strategy for cancer ***,simultaneously delivering chemotherapeutic drugs and photosensitizers and precisely adjusting the ratio of the two components as needed remains a challengeable ***,novel supramolecular nanoparticles(donated as BODIPY-CPT-NPs)for chemo-photodynamic combination cancer therapy are constructed from a glutathione-responsive camptothecin-based prodrug,BODIPY photosensitizer,and dimacrocyclic host molecule through orthogonal host-guest recognitions and *** this strategy,the ratio of prodrugs and photosensitizers in nanoparticles can be easily and precisely controlled as *** from the strong host-guest interactions and stable self-assembly,the nanoparticles exhibit excellent stability and photobleaching ***,camptothecin can be released from nanoparticles for chemotherapy in the presence of reduction agent and single oxygen can be efficiently generated for PDT with light *** combined effects of the BODIPY-CPT-NPs have been verified in CT26 and HeLa cancer cells.

关键词： Supramolecular nanoparticles Host-guest systems Photodynamic therapy Drug delivery Prodrugs

Nitrogen-doped graphene hydrogel-supported NiPt-CeOx nanocomposites and their superior catalysis for hydrogen generation from hydrazine at room temperature

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Nano Research 2017年第8期10卷 2856-2865页

作者： Xiaoqiong Du Chao Liu Cheng Du Ping Cai Gongzhen Cheng Wei Luo College of Chemistry and Molecular Sciences Wuhan University Wuhan 430072 China Key laboratory of Advanced Energy Materials Chemistry (Ministry of Education) Nankai University Tianjin 300071 China

The safe and efficient storage and release of hydrogen is one of the key technological challenges for the fuel cell-based hydrogen economy. Hydrazine monohydrate has attracted considerable attention as a safe and convent chemical hydrogen-storage material. Herein, we report the facile synthesis of NiPt-CeOx nanocomposites supported by three-dimensional nitrogen-doped graphene hydrogels （NGHs） via a simple one-step co-reduction synthesis method. These catalysts were composition-dependent for hydrogen generation from an alkaline solution of hydrazine. （NisPt5）I-（CeOx）0.B/NGH exhibited the highest catalytic activity, with 100% hydrogen selectivity and turnover frequencies of 408 h^-1 at 298 K and 3,064 h^-1 at 323 K. These superior catalytic performances are attributed to the electronic structure of the NiPt centers, which was modified by the electron interaction between NiPt and CeOx and the strong metal-support interaction between NiPt-CeOx and the NGH.

关键词： nitrogen-doped graphene hydrogels NiPt-CeOx hydrogen storage hydrazine

Ultra-bright near-infrared-IIb emitting Zn-doped Ag_(2)Te quantum dots for noninvasive monitoring of traumatic brain injury

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Nano Research 2023年第2期16卷 2719-2727页

作者： Yifei Zhou Biao Huang Shi-Hui Chen Shu-Lin Liu Mingxi Zhang Ran Cui College of Chemistry and Molecular Sciences Wuhan UniversityWuhan 430072China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China State Key Laboratory of Medicinal Chemical Biology Tianjin Key Laboratory of Biosensing and Molecular RecognitionResearch Centre for Analytical SciencesCollege of ChemistryNankai UniversityTianjin 300071China

The long-wavelength region of the near-infrared-IIb(NIR-IIb,1,500–1,700 nm)imaging window has become an ideal window for in vivo imaging due to the suppressed photon scattering and near-zero autofluorescence of biological ***,it is necessary to develop fluorescent probes with excellent fluorescence performance and stability for NIR-IIb fluorescence *** this work,zinc-doped silver telluride quantum dots(Zn:Ag_(2)Te QDs)with bright fluorescence in the NIR-IIb window were *** introduction of Zn dopants inhibited crystal defects and reduced non-radiative ***,the quantum yield and fluorescence lifetime of Zn:Ag_(2)Te QDs were significantly *** addition,Zn-doping increased the number of ligands on the surface of QDs,thus enhancing the colloidal stability of Zn:Ag_(2)Te ***,the PEGylated Zn:Ag_(2)Te QDs with high absolute quantum yield realized noninvasive imaging of cerebral vascular of mouse with high resolution able to distinguish blood capillary,which could be utilized to monitor the brain condition of mice after traumatic brain injury.

关键词： near-infrared-IIb(NIR-IIb)window silver telluride quantum dots fluorescence in vivo imaging