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Smart crystalline frameworks constructed with bisquinoxaline-based component for multi-stimulus luminescent sensing materials

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Chinese Journal of Structural Chemistry 2023年第2期42卷 9-22页

作者： peng-da liu Ao-Gang liu peng-Min Wang Yuan Chen Bao Li Key Laboratory of Material Chemistry for Energy Conversion and Storage Semiconductor Chemistry CenterSchool of Chemistry and Chemical EngineeringHubei Key Laboratory of Bioinorganic Chemistry&Materia MedicaHuazhong University of Science and TechnologyWuhanHubei 430074People's Republic of China

Crystalline materials with well-defined structures and ordered molecular arrays can provide a new research platform to fabricate new smart materials with excellent stimulus response *** them,Luminescent Metal-Organic Frameworks(LMOFs)and Hydrogen-bonding Organic Frameworks(HOFs)show great promise for fluorescence detection to different *** order to further extend the smart sensing frameworks and enhance the relevant sensing performance,the present work specifically selects 4,4',4",4(")-([6,6'-biquinoxaline]-2,2',3,3'-tetrayl)tetrabenzoic acid(H4L)consisting of the bisquinoxaline functional group as an optical response group,and HOF(HUST-25,HUST=Huazhong University of Science and Technology),Zn-MOF(HUST-26),and Cd-MOF(HUST-27)were successfully *** could achieve the fluorescence recognition of Fe^(3+),MnO_(4)^(-),Cr_(2)O_(7)^(2-),p-nitrotoluene(4-NP),2,4,6-trinitrotoluene(TNP)and metronidazole(MDZ).The detection range of Zn-MOF constructed using Zn ions was similar to that of HOF,but the detection sensitivity of metal cations was significantly *** Cd-MOF formed a six-fold interpenetrating structure,it was still able to retain a large pore *** dense stacking structure increases the quinoxaline density,which effectively expanded the sensitivity and detection range of fluorescence ***,Cd-MOF showed better detection for nitro explosives,antibiotics,and organic small molecules with ketone *** example,compared to the previous literatures,Cd-MOF has a larger Ksv value for the nitro-explosive nitrobenzene(NB),indicating the very high detection *** series frameworks can present excellent sensing properties mainly because the func-tional primitives can be uniformly distributed in the skeleton of the crystalline materials,forming an ordered molecular array that enables the efficient energy transfer between the external stimulus signal and the response function *** related results indic

关键词： Metal-organic framework Hydrogen bonding organic framework Luminescent sening Bisquinoxaline group Sensor

Tm-2^2 Confers Different Resistance Responses against Tobacco mosaic virus Dependent on Its Expression Level

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Molecular Plant 2013年第3期6卷 971-974页

作者： Haili Zhang Jinping Zhao Shanshan liu da-peng Zhang Yule liu MOE Key Laboratory of Bioinformatics School of Life Sciences Tsinghua University Beijing 100084 PR China

Dear Editor, The innate immunity system of plants can be summarized into two clades. The former clade, where resistant processes are mediated by pattern recognition receptors, is termed pathogen-associated molecular ... 详细信息

关键词： TOBACCO mosaic virus DISEASE resistance of plants TOBACCO mosaic disease

Synthesis and Photoluminescence Properties of Uniform Y_2O_3:Eu^(3+) Hollow Spheres with Tunable Shell Thickness

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Chemical Research in Chinese Universities 2011年第6期27卷 919-923页

作者： XIAO Ying GAO Zhi-yong WU da-peng JIANG Yi liu Ning JIANG Kai College of Chemistry and Environmental Science Henan Normal University Xinxiang 453007 P. R. China

Y2O3：Eu3＋ hollow spheres were successfully prepared with melamine formaldehyde（MF） spheres as template. The MF spheres played a significant role in directing the formation of the hollow shells which are composed of numerous primary nanoparticles. Furthermore, the shell thickness of these hollow spheres could be readily tailored by adjusting the dosage of MF template. Based on the photoluminescence（PL） investigation, the red emission intensities（613 nm） of these Y2O3：Eu3＋ hollow spheres are greatly influenced by their shell thickness and it was found that hollow spheres with thin shell thickness and intact hollow structures permit a better PL performance.

关键词： Y2O3:Eu3+ Hollow structure Templating Photoluminescence

Fe-doped CoP core–shell structure with open cages as efficient electrocatalyst for oxygen evolution

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Journal of Energy Chemistry 2020年第9期29卷 328-333,I0010页

作者： Jing-Yi Xie Zi-Zhang liu Jia Li Lei Feng Min Yang Yu Ma da-peng liu Lei Wang Yong-Ming Chai Bin Dong College of Science State Key Laboratory of Heavy Oil ProcessingChina University of Petroleum(East China)Qingdao 266580ShandongChina Shandong Key Laboratory of Biochemical Analysis College of Chemistry and Molecular EngineeringQingdao University of Science and TechnologyQingdao 266042ShandongChina

Developing a facile approach based on transition metal-based Prussian blue(PB)and its analogues(PBAs)with core-shell nanostructure is a very promising choice for constructing cost-effective electrocatalysts for oxygen evolution reaction(OER).Herein,a bimetallic core-shell structure with open cages of Fe-doped CoP(Fe-CoP cage)has been synthesized using CoFe-PBA cage-4 as precursor through a facile hydrothermal method and following phosphating ***,there is an open hole in each face center of Fe-CoP cage,which suggests the more exposure of active sites for *** measurements show that Fe-CoP cage can afford a current density of 10 mA cm-2 at a low overpotential(300 mV),which is better than that of *** excellent performance can be attributed to Fe doping composition and unique open-cage core-shell *** synergistic effect derived from bimetallic active for OER has been *** its great catalytic stability has been evaluated via 1000 cycles of CV and chronoamperometry *** work provides a potential method to design multiple transitional metal-doping electrocatalysts with complex framework derived from PBAs for water splitting.

关键词： Core-shell structure CoFe-PBA Cation exchange Phosphating Oxygen evolution reaction

Restraint effect of partition wall on the tunnel floor heave in layered rock mass

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Journal of Mountain Science 2024年第7期21卷 2462-2479页

作者： YANG Yunyun HUANG da ZHONG Zhu liu Yang peng Jianbing School of Civil and Transportation Engineering Hebei University of TechnologyTianjin 300401China College of Geology Engineering and Geomatics Chang’an UniversityXi’an 710054China College of Civil Engineering&Architecture China Three Gorges UniversityYichang 443002China.

The presence of horizontal layered rocks in tunnel engineering significantly impacts the stability and strength of the surrounding rock mass,leading to floor heave in the *** study focused on preparing layered specimens of rock-like material with varying thickness to investigate the failure behaviors of tunnel *** results indicate that thin-layered rock mass exhibits weak interlayer bonding,causing rock layers near the surface to buckle and break upwards when subjected to horizontal *** an increase in the layer thickness,a transition in failure mode occurs from upward buckling to shear failure along the plane,leading to a noticeable reduction in floor heave *** primary cause of significant deformation in floor heave is upward buckling *** address this issue,the study proposes the installation of a partition wall in the middle of the floor to mitigate heave deformation of the rock *** results demonstrate that the partition wall has a considerable stabilizing effect on the floor,reducing the zone of buckling failure and minimizing floor heave *** is crucial for the partition wall to be sufficiently high to prevent buckling failure and ensure *** simulation calculations on an engineering example,it is confirmed that implementing a partition wall can effectively reduce floor heave and enhance the stability of tunnel floor.

关键词： Layered rock Floor heave Horizontal compression test Failure behavior Partition wall

Hollow Fe_(4)C/FeP Nanoboxes with Heterostructure and Carbon Armor for Efficient and Stable Hydrogen Evolution

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Chinese Journal of Structural Chemistry 2022年第7期41卷 53-58页

作者： Jing-Yi Xie Hui-Ying Zhao Yi-Wen Dong Yang Wu da-peng liu Yong-Ming Chai Bin Dong State Key Laboratory of Heavy Oil Processing College of Chemistry and Chemical EngineeringChina University of Petroleum(East China)Qingdao 266580China

The heterojunction interfacial modulation of FeP is an effective strategy to regulate the intrinsic activity and stability, which is a major challenge to promote the industrial application of FeP-based electrocatalysts. Herein, hollow Fe_(4)C/FeP box with heterojunction interface and carbon armor is successfully synthesized, which can expose numerous active sites and protect catalyst from corrosion. Electrochemical measurements show that Fe_(4)C/FeP exhibits excellent hydrogen evolution activity and stability. It only needs 180 mV to achieve the current density of 10 mA cm^(-2). The high-activity may be due to the synergistic effects of porous framework, graphitic carbon coating and heterojunction structure of FeC and FeP, which optimize the electronic structure and accelerates electron transfer. In addition, the target catalyst can withstand 5000 cycles of CV testing without significant change in properties. The excellent stability may be attributed to the graphitic carbon coating as the armor that can prevent the catalyst from corrosion of electrolyte. This work may provide a synthetic approach to produce a series of carbon-coated and heterojunction structure of transition metal phosphides for water splitting.

关键词： carbon armor hollow box heterostructured electrocatalysts hydrogen evolution reaction

Knittable and washable aerogel fiber inspired by polar bear hair

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Science China Materials 2024年第2期67卷 705-706页

作者： Yue liu Huisheng peng State Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular Scienceand Institute of Fiber Materials and DevicesFudan UniversityShanghai 200438China

The advances in chemistry and materials have boosted the development of smart textiles,which are poised to revolutionize human lifestyles through multifunctional integration,such as heating,cooling,sensing and supplying energy^([1,2]).Among them,thermal insulation is an essential function of textiles to protect humans from complex and extreme environments and realize personal thermal management without energy con-sumption^([3]).

关键词： textiles insulation extreme

Renewable conversion of coal gangue to 13-X molecular sieve for Cd^(2+)-containing wastewater adsorption performance

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Rare Metals 2024年第2期43卷 702-710页

作者： Le Kang Si-Fan liu da-Wei Yi Kai Wang Hui-Ling Du Hao-Qi Huang peng Chen College of Materials Science and Engineering Xi’an University of Science and TechnologyXi’an710054China School of Electrical Engineering Weihai Innovation Research InstituteQingdao UniversityQingdao266000China School of Metallurgy Northeastern UniversityShenyang110819China School of Materials and Chemical Engineering Tongren UniversityTongren554300China

Using coal gangue(CG)as raw material,a new type of all solid-waste-based 13-X molecular sieve material was controllably prepared by alkali fusion-hydrothermal *** synthetic molecular sieve was used as a solid adsorbent to treat Cd^(2+)-containing wastewater,and its adsorption behavior on Cd^(2+)in aqueous solution was studied and *** microstructure and morphology of the molecular sieve were investigated by X-ray diffraction(XRD),field emission scanning electron microscopy(FESEM)and specific surface area *** results show that the synthesized 13-X molecular sieve has higher Brunauer–Emmett–Teller(BET)specific surface area with higher crystallinity and higher adsorption capacity for the heavy metal Cd^(2+).The adsorption process of Cd^(2+)by molecular sieve conforms to the Langmuir isotherm adsorption equation and Lagergren pseudo-second-order rate *** with thermodynamic calculation,it can be concluded that the adsorption process is physically monolayer,spontaneous and *** this study,a low-cost and naturally available synthesis method of 13-X molecular sieve is *** with its adsorption mechanism for Cd^(2+),it provides a feasible and general method for removing heavy metal ions from coal gangue and also provides a new way for the utilization of coal gangue with high added value.

关键词： Coal gangue Hydrothermal synthesis 13-X molecular sieve Adsorption Wastewater containing Cd^(2+)

The jasmonate pathway promotes nodule symbiosis and suppresses host plant defense in Medicago truncatula

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Molecular Plant 2024年第8期17卷 1183-1203页

作者： da Guo Jingrui Li peng liu Yuzhan Wang Na Cao Xiangling Fang Tao Wang Jiangli Dong College of Biological Sciences China Agricultural UniversityBeijing 100193China State Key Laboratory of Plant Environmental Resilience College of Biological SciencesChina Agricultural UniversityBejing 100193China State Key Laboratory of Herbage Improvement and Grassland Agro-ecosystems College of Pastoral Agriculture Science and TechnologyLanzhou UniversityLanzhou730020China

Root nodule symbiosis(RNs)between legumes and rhizobia is a major source of nitrogen in agricultural *** symbiosis requires precise regulation of plant defense *** role of the defense hormone jasmonic acid(JA)in the immune response has been extensively *** research shows that JA can play either a positive or negative regulatory role in RNS depending on its concentration,but the molecular mechanisms remain to be *** this study,we found that inoculation with the rhizobia Sm1021 induces the JA pathway in Medicago truncatula,and blocking the JA pathway significantly reduces the number of infection *** in the MtMYc2 gene,which encodes a JA signaling master transcription factor,significantly inhibited rhizobia infection,terminal differentiation,and symbiotic cell *** RNA sequencing and chromatin immunoprecipitation sequencing,we discovered that MtMYc2 regulates the expression of nodule-specific MtDNF2,MtNAD1,and MtSymCRK to suppress host defense,while it activates MtDNF1 expression to regulate the maturation of MtNCRs,which in turn promotes bacteroid *** importantly,MtMYC2 participates in symbiotic signal transduction by promoting the expression of ***,the MtMYC2-MtiPD3 transcriptional regulatory module is specifically present in legumes,and the Mtmyc2 mutants are susceptible to the infection by the pathogen Rhizoctonia ***,these findings reveal the molecular mechanisms of how the JA pathway regulates RNS,broadening our understanding of the roles of JA in plant-microbe interactions.

关键词： jasmonic acid MYC2 symbiosis defense Medicago truncatula