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Stable hydrogen-bonded organic frameworks and their photo-and electro-responses

Nano Research 2024年第8期17卷 7675-7699页

作者： Ying Hou xin-song Huang Sheng-Hao Gong Chen Liu Yangyang Liu Tian-Fu Liu State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China University of Chinese Academy of Sciences Beijing 100049China Department of Chemistry and Biochemistry California State UniversityLos AngelesCalifornia 90032USA College of Chemistry and Materials Science Fujian Normal UniversityFuzhou 350007China

Hydrogen-bonded organic frameworks(HOFs)are a recent class of porous materials that have garnered considerable research interest owing to their distinctive *** can be constructed through judicious selection of H-bonding motifs,which are further enforced by other weak intermolecular interactions such asπ–πstacking,van der Waals forces,and framework *** advantage of these interactions,we can expand the functional field of HOFs by introducing active ***,researchers have made substantial advancements in using HOFs for chemical sensing,catalysis,proton conduction,biological applications,and *** low bonding energy of H-bonds allows for precise control over the concentration of ligands in solvents,forming diverse HOF *** varied structures offer significant advantages for producing HOFs with photo-responsive and electro-responsive ***,the presence of H-bonds in HOFs results in their inherent lower stability compared to metal-organic frameworks(MOFs)and covalent-organic frameworks(COFs)formed via coordination and covalent bonds,*** a result,the pursuit of stable and innovative HOF materials with novel functional sites remains an ongoing *** review provides an overview of recent research progress in the development of new strategies for stable HOF synthesis and applications of HOFs with stimuli-responsive *** first classified all synthetic methods reported to date and discussed the stable HOFs synthesized,as well as their unique properties and *** addition,we summarized the applications of HOFs utilizing their synergistic responses to external stimuli,including photo,electrical,pressure,and chemical *** systematically reviewed stable HOF synthesis and applications,which may lead to a deeper understanding of the structure–activity relationship for these materials and guide future HOF design.

关键词： stable hydrogen-bonded organic frameworks(HOFs) photo-response electro-response photoelectric synergistic response

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Effects of Diesel Concentration on the Thermal Conductivity,Specific Heat Capacity and Thermal Diffusivity of Diesel-Contaminated Soil

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Journal of Thermal Science 2024年第2期33卷 696-709页

作者： WU Yuhao WU Yuefei LUO Gubai ZHANG Teng WANG Qing FAN Liwu song xin YU Zitao Key Laboratory of Clean Energy and Carbon Neutrality of Zhejiang Province Zhejiang UniversityHangzhou310027China State Key Laboratory of Clean Energy Utilization Zhejiang UniversityHangzhou310027China Institute of Thermal Science and Power Systems School of Energy EngineeringZhejiang UniversityHangzhou310027China Center Environmental Protection Technology Company Limited Beijing100176China Institute of Soil Science Chinese Academy of SciencesNanjing210008China

High energy consumption is a serious issue associated with in situ thermal desorption(TD)remediation of sites contaminated by petroleum hydrocarbons(PHs).The knowledge on the thermophysical properties of contaminated soil can help predict accurately the transient temperature distribution in a remediation site,for the purpose of energy ***,such data are rarely reported for PH-contaminated *** this study,by taking diesel as a representative example for PHs,soil samples with constant dry bulk density but different diesel mass concentrations ranging from 0% to 20% were prepared,and the variations of their thermal conductivity,specific heat capacity and thermal diffusivity were measured and analyzed over a wide temperature range between 0℃ and 120℃.It was found that the effect of diesel concentration on the thermal conductivity of soil is negligible when it is below 1%.When diesel concentration is below 10%,the thermal conductivity of soil increases with raising the ***,when diesel concentration becomes above 10%,the change of the thermal conductivity of soil with temperature exhibits the opposite *** is mainly due to the competition between soil minerals and diesel,because the thermal conductivity of minerals increases with temperature,whereas the thermal conductivity of diesel decreases with *** analysis results showed that,compared with temperature,the diesel concentration has more significant effects on soil thermal *** of the diesel concentration,with the increase of temperature,the specific heat capacity of soil increases,while the thermal diffusivity of soil *** addition,the results of a control experiment exhibited that the relative differences of the thermal conductivity of the soil samples containing the same concentration of both diesel and a pure alkane are all below 10%,indicating that the results obtained with diesel in this study can be extended to the family of PHs.A theo

关键词： contaminated soil diesel concentration thermal conductivity specific heat capacity thermal diffusivity thermal desorption fractal model

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Development and application of a multi-graphite electrode DC plasma tundish heating

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Journal of Iron and Steel Research International 2022年第11期29卷 1800-1806页

作者： Yong Wang Cun Wang Meng-jing Zhao Jing-xin song Shu-feng Yang Jing-she Li School of Metallurgical and Ecological Engineering University of Science and Technology BeijingBeijing 100083China Beijing Aobang Advanced Materials Co. Ltd.Beijing 101400China Meishan I&S Co.of Baowu Group Nanjing 210039JiangsuChina

The world’s first three-graphite electrode direct current(DC)plasma heating system(2500 kW)was successfully put into production on the 50-t tundish of a two-strand slab *** single metallic torch plasma tundish heaters were *** addition,the induction heating system was also *** three-graphite electrode DC plasma tundish heating(PTH)system does not require any electrode to be fitted to the *** electrodes can be used to realize uniform and fast heating of the six-strand *** with high power can effectively eliminate the steep temperature drop of the molten steel in the tundish during ladle *** system has turned out to be very reliable,simple,and *** heating rate is high within 0.5 to 2.0℃/*** heats with ultra-low superheat(2.6-11.0℃)were observed,and the molten steels were successfully cast by the powerful heating capacity and good control performance of the system in the practical *** can be concluded that continuous casting with superheat of 5-10℃in the tundish was fully realistic with PTH.

关键词： Plasma tundish heating Superheat Center segregation Graphite electrode

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A bio-based epoxy resin derived from p-hydroxycinnamic acid with high mechanical properties and flame retardancy

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Chinese Chemical Letters 2022年第11期33卷 4912-4917页

作者： xin song Ze-Peng Deng Chun-Bo Li Fei song Xiu-Li Wang Li Chen De-Ming Guo Yu-Zhong Wang The Collaborative Innovation Center for Eco-Friendly and Fire-Safety Polymeric Materials(MoE) National Engineering Laboratory of Eco-Friendly Polymeric Materials(Sichuan)State Key Laboratory of Polymer Materials EngineeringCollege of ChemistrySichuan UniversityChengdu 610064China

Recent advances in epoxy resins have been forward to achieving high mechanical performance,thermal stability,and flame ***,seeking sustainable bio-based epoxy precursors and avoiding introduction of additional flame-retardant agents are still of increasing *** we report the synthesis of p-hydroxycinnamic acid-derived epoxy monomer(HCA-EP)via a simple one-step reaction,and the HCA-EP can be cured with 4,4′-diaminodiphenylmethane(DDM)to prepare epoxy *** with the typical petroleum-based epoxy resin,bisphenol A epoxy resin,the HCA-EP-DDM shows a relatively high glass transition temperature(192.9℃)and impressive mechanical properties(tensile strength of 98.3 MPa and flexural strength of 158.9 MPa).Furthermore,the HCA-EP-DDM passes the V-1 flammability rating in UL-94 test and presents the limiting oxygen index of 32.6%.Notably,its char yield is as high as 31.6%under N_(2),and the peak heat rate release is 60%lower than that of bisphenol A epoxy *** findings provide a simple way of using p-hydroxycinnamic acid instead of bisphenol A to construct high-performance bio-based thermosets.

关键词： Epoxy resin Bio-based p-Hydroxycinnamic acid Mechanical performance Intrinsic flame retardancy

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Glucose supplementation improves intestinal amino acid transport and muscle amino acid pool in pigs during chronic cold exposure

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Animal Nutrition 2023年第1期12卷 360-374页

作者： Teng Teng xin song Guodong Sun Hongwei Ding Haoyang Sun Guangdong Bai Baoming Shi Institute of Animal Nutrition Northeast Agricultural UniversityHarbin 150030China

Mammals in northern regions chronically suffer from low temperatures during autumn-winter *** aim of this study was to investigate the response of intestinal amino acid transport and the amino acid pool in muscle to chronic cold exposure via Min pig models(cold adaptation)and Yorkshire pig models(non-cold adaptation).Furthermore,this study explored the beneficial effects of glucose supplementation on small intestinal amino acid transport and amino acid pool in muscle of cold-exposed Yorkshire *** pigs(Exp.1)and Yorkshire pigs(Exp.2)were divided into a control group(17℃,n=6)and chronic cold exposure group(7℃,n=6),*** Yorkshire pigs(Exp.3)were divided into a cold control group and cold glucose supplementation group(8℃).The results showed that chronic cold exposure inhibited peptide transporter protein 1(PepT1)and excitatory amino acid transporter 3(EAAT3)expression in ileal mucosa and cationic amino acid transporter-1(CAT-1)in the jejunal mucosa of Yorkshire pigs(P<0.05).In contrast,CAT-1,PepT1 and EAAT3 expression was enhanced in the duodenal mucosa of Min pigs(P<0.05).Branched amino acids(BCAA)in the muscle of Yorkshire pigs were consumed by chronic cold exposure,accompanied by increased muscle RING-finger protein-1(MuRF1)and muscle atrophy F-box(atrogin-1)expression(P<0.05).More importantly,reduced concentrations of dystrophin were detected in the muscle of Yorkshire pigs(P<0.05).However,glycine concentration in the muscle of Min pigs was raised(P<0.05).In the absence of interaction between chronic cold exposure and glucose supplementation,glucose supplementation improved CAT-1 expression in the jejunal mucosa and PepT1 expression in the ileal mucosa of cold-exposed Yorkshire pigs(P<0.05).It also improved BCAA and inhibited MuRF1 and atrogin-1 expression in muscle(P<0.05).Moreover,dystrophin concentration was improved by glucose supplementation(P<0.05).In summary,chronic cold exposure inhibits amino acid absorption in the small intestin

关键词： Chronic cold exposure Amino acid transporter Branched amino acid Protein deposition Glucose Pig

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Characteristics of glucose and lipid metabolism and the interaction between gut microbiota and colonic mucosal immunity in pigs during cold exposure

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Journal of Animal Science and Biotechnology 2023年第5期14卷 2158-2179页

作者： Teng Teng Guodong Sun Hongwei Ding xin song Guangdong Bai Baoming Shi Tingting Shang College of Animal Science and Technology Northeast Agricultural UniversityHarbin 150030China

Background Cold regions have long autumn and winter seasons and low ambient *** pigs are unable to adjust to the cold,oxidative damage and inflammation may ***,the differences between cold and non-cold adaptation regarding glucose and lipid metabolism,gut microbiota and colonic mucosal immunological features in pigs are *** study revealed the glucose and lipid metabolic responses and the dual role of gut microbiota in pigs during cold and non-cold ***,the regulatory effects of dietary glucose supplements on glucose and lipid metabolism and the colonic mucosal barrier were evaluated in cold-exposed *** Cold and non-cold-adapted models were established by Min and Yorkshire *** results exhibited that cold exposure induced glucose overconsumption in non-cold-adapted pig models(Yorkshire pigs),decreasing plasma glucose *** this case,cold exposure enhanced the ATGL and CPT-1αexpression to promote liver lipolysis and fatty acid ***,the two probiotics(Collinsella and Bifidobacterium)depletion and the enrichment of two pathogens(Sutterella and Escherichia-Shigella)in colonic microbiota are not conducive to colonic mucosal ***,glucagon-mediated hepatic glycogenolysis in cold-adapted pig models(Min pigs)maintained the stability of glucose homeostasis during cold *** contributed to the gut microbiota(including the enrichment of the Rikenellaceae RC9 gut group,[Eubacterium]coprostanoligenes group and WCHB1-41)that favored cold-adapted *** The results of both models indicate that the gut microbiota during cold adaptation contributes to the protection of the colonic *** non-cold adaptation,cold-induced glucose overconsumption promotes thermogenesis through lipolysis,but interferes with the gut microbiome and colonic mucosal ***,glucagon-mediated hepatic glycogenolysis contributes to glucose homeostasis during cold exposur

关键词： Cold exposure Colonic mucosal immunity Fatty acid oxidation Glucose and lipid metabolism Gut microbiota Pig model

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Photocatalytic activity of perovskite SrTiO_(3)catalysts doped with variable rare earth ions

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Rare Metals 2021年第5期40卷 1077-1085页

作者： Yue-xin song Wen-Qi Ma Jing-Jing Chen Jiao Xu Zhi-Yong Mao Da-Jian Wang Tianjin Key Laboratory for Photoelectric Materials and Devices School of Materials Science and EngineeringTianjin University of TechnologyTianjin 300384China Key Laboratory of Display Materials and Photoelectric Devices Ministry of EducationTianjin University of TechnologyTianjin 300384China

In this work,15 types of rare earth(Re)ions,including Y^(3+),La^(3+),Ce^(3+),Pr^(3+),Nd^(3+),Sm^(3+),Eu^(3+),Gd^(3+),Tb^(3+),Dy^(3+),Ho^(3+),Er^(3+),Tm^(3+),Yb^(3+)and Lu^(3+)doped perovskite SrTiO_(3)powders were synthesized by solgel *** influence of Re ions doping on the crystal structure,morphology and optical property as well as the photocatalytic activity for the photodegradation of rhodamine B(RhB)was investigated in detail when the synthesized Re ions doped SrTiO_(3)powders were served as *** presented results revealed that the crystal structure is invariable,whereas the morphology and the optical bandgap are variable for the resultant SrTiO_(3)powders when different Re ions were incorporated into the SrTiO_(3)*** relatedness between the morphology,optical property and photocatalytic activity of the synthesized SrTiO_(3)catalysts doped with variable Re ions were analyzed deeply,providing an insight into the influence factors on the photocatalytic activity of catalysts.

关键词： SrTiO_(3) Rare earth ions Doping Photocatalytic activity

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Impact of Periconceptional Multi-micronutrient Supplementation on Gestation:A Population-based Study

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Biomedical and Environmental Sciences 2013年第1期26卷 23-31页

作者： WANG Ya Fei PEI Li Jun song xin Ming CHEN Gong ZHENG Xiao Ying Institute of Population Research/WHO Collaborating Center on Reproductive Health and Population Science Peking University

Objective To examine the effect of periconceptional multi‐micronutrient supplementation on gestation and birth *** A population‐based community intervention program was conducted in 18 counties in *** were divided into an intervention group,who received multi‐micronutrient supplementation from at least 3 months before pregnancy throughout the first trimester,and a control *** women were followed up to record information about birth *** socio‐economic characteristics and main birth outcomes were *** age was further analyzed using survival analysis,to determine the time distribution of *** Periconceptional multi‐micronutrient supplementation was associated with higher birth weight,birth length and occipitofrontal head circumference,and with lower incidence rates for stillbirth,low birth weight,and preterm ***,periconceptional multi‐micronutrient supplementation changed the time distribution of delivery,making the deliveries more clustered in the period between day 275 and day 295 of *** Our study shows that periconceptional multi‐micronutrient supplementation is beneficial for fetal development and optimizes all measured aspects of health in neonates in socioeconomically disadvantaged areas in *** change in time distribution of deliveries caused by multi‐micronutrient supplementation needs further clarification.

关键词： Multi‐micronutrient Supplementation Gestation Birth weight Gestational age

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Synthesis, Photoluminescence and Photocatalytic Performance of BiPO4 with Different Phase Structures

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Chemical Research in Chinese Universities 2013年第3期29卷 556-562页

作者： WANG Yun-jian LI Li-ping ZHENG Jing HUANG xin-song LI Guang-she State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fuzhou 350002 P. R. China Graduate University of Chinese Academy of Sciences Beijing 100049 P. R. China

Three kinds of crystal phase BiPO4（HP, LTBP, and HTBP） were selectively synthesized by controlling the preparation conditions. Structures of the three samples are all constructed by PO4 and BiO8 polyhedra but with different geometric structures. Detailed characterization was carried out by X-ray diffraction（XRD）, scanning eletron microscopy（SEM） and Raman, UV-Vis, and luminescence spectrometries. Three samples exhibit huge distinctions in their photoluminescence（PL） lifetime： 0.68, 162 and 160 μs for HP, LTBP, and HTBP, respectively. More interesting, an outstanding photocatalytic activity is observed for as-prepared LTBP nanorod, which shows even higher activity for the degradation of MB solution than P25. In addition, experiments were carried out to clarify the role of hydroxyl （OH） and superoxide radicals（O2·） played in photocatalytic process and it was found O2·was the main active species in BiPO4 photocatalysts. Further comparison of structural and photocatalytic properties of the three samples finds that structure distortion is contributed to their property difference. A correlation was found between photocatalytic performance and the distortion of BiO8 dodecahedra. The internal field generated by the distortion of BiO8 dodecahedra was believed advantageous for the separation of electron and hole, which was in favor of the improvement of photocatalytic activity. This correlation may help to design other photocatalysts with high activity.

关键词： BiPO4 Photoluminescence Photocatalysis -

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Syntheses, Crystal Structures, and Biological Activities of Two Enantiomeric 2-Trifluoromethylthieno[2,3-d]pyrimidin-4-amine Derivatives

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Chinese Journal of Structural Chemistry 2015年第8期34卷 1224-1230页

作者： GAO Hui FU Ju ZHAO Ming-Juan song xin-Jian YANG Ping ZHENG Yin Key Laboratory of Biologic Resources Protection and Utilization of Hubei Province Hubei University for Nationalities School of Chemical and Environmental Engineering Hubei University for Nationalities

Two enantiomeric 2-trifluoromethyl-6,7-dihydro-5H-cyclopenta[4,5]thieno[2,3-d] pyrimidin-4-amine derivatives were synthesized by nucleophilic substitution of two chiral amines with 4-chloro-2-trifiuoromethyl-6,7-dihydro-5H-cyclopenta[4~5]thieno[2-3-d]pyrimidine, which started from 2-amino-5,6-dihydro-4H-cyclopenta[b]thiophene-3-carbonitrile, trifluoroacetic acid （TFA） and phosphoryl trichloride via one-pot procedure. Their structures were determined by single-crystal X-ray diffraction. Enantiomer （R）-3,（R）-N-（1-phenylethyl）-2-trifluoromethyl-6,7- dihydro-5H-cyclopenta[4,5]thieno[2,3-d]pyrimidin-4-amine crystallizes in the tetragonal system, space group P43 with a = 8.6847（6）, b = 8.6847（6）, c = 22.419（2） A, V= 1690.9（3） A3, Z = 4, Dc = 1.428 g/cm^3, p = 0.228 mm-1, F（000） = 752, the final R = 0.0463 and wR = 0.1257 for 3442 observed reflections with 1〉 20（/）. Enantiomer （S）-3,（S）-N-（1-phenylethyl）-2-trifluoromethyl-6,7-dihydro- 5H-cycloperita[4,5]thieno[2,3-d]pyrimidin-4-amine crystallizes in the tetragonal system, space group P41 with a = 8.688, b = 8.688, c = 22.421 A, V = 1692.4 A3, Z = 4, Dc = 1.426 g/cm^3, μ= 0.227 mm^-1, F（000） = 752, the final R = 0.0682 and wR = 0.1806 for 3182 observed reflections with ≥20（I）. The preliminary bioassay indicated that the R-enantiomer exhibits higher antitumor activity against MCF-7 than gefitinib.

关键词： thieno[2,3-d]pyrimidine, enantiomeric pair, trifluoromethyl, antitumor activity

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