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Theoretical study on homoleptic mononuclear and binuclear ruthenium carbonyls Ru(CO)_n(n=3―5) and Ru_2.CO)_n(n=8,9)

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Science china chemistry 2009年第11期52卷 1938-1944页

作者： PENG Bin1,GU FengLong1,ZHANG XiuHui2.luo qiong2.& LI QianShu1,2.1 {2. of chemistry and Environment,south china Normal university,Guangzhou 510631,china 2.Beijing Institute of Technology,Beijing 100081,china 1. school of chemistry and Environment South China Normal University Guangzhou 510631 China 2. Beijing Institute of Technology Beijing 100081 China

Homoleptic mononuclear and binuclear ruthenium carbonyls Ru(CO)n(n=3―5) and Ru2.CO)n(n=8,9) have been investigated using density functional *** isomers are *** Ru(CO)5,the lowest-energy structure is the singlet D3h trigonal *** to Os(CO)5,the distorted square pyramid isomer with C2. symmetry lies ～7 kJ·mol-1 higher in *** the unsaturated mononuclear ruthenium carbonyls Ru(CO)4 and Ru(CO)3,a singlet structure with C2. symmetry and a Cs bent Tshaped structure are the lowest-energy structures,*** global minimum for the Ru2.CO)9 is a singly bridged(CO)4Ru(μ-CO)Ru(CO)4 structure.A triply bridged Ru2.CO)6(μ-CO)3 structure analogous to the known Fe2.CO)9 structure is predicted to lie very close in energy to the global *** Ru2.CO)8,the doubly bridged C2.structure is predicted to be the global *** the lowest-energy structures of M2.CO)n(M=Fe,Ru,Os,n=9,8),it is found that both iron and ruthenium are favored to form structures containing more bridging carbonyl groups,while osmium prefers to have structures with less bridging carbonyl *** study of dissociation energy shows that the dissociation of Ru2.CO)9 into the mononuclear fragments Ru(CO)5+Ru(CO)4 is a less energetically demanding process than the dissociation of one carbonyl group from Ru2.CO)9 to give Ru2.CO)8.

关键词： dinuclear ruthenium carbonyls DFT theoretical study

Ferroelectric catalytic BaTiO3-based composite insoles topromote healing of infected wounds:Analysis ofantibacterial efficacy and angiogenesis

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Interdisciplinary Materials 2024年第5期3卷 757-774页

作者： qiong Liu Xudan Liu Linfeng Fan Xinna Bai Hao Pan Hang luo Dou Zhang Haitao Huang Chris R.Bowen State Key Laboratory of Powder Metallurgy Central South UniversityChangshaHunanChina Department of Applied Physics The Hong Kong Polytechnic UniversityHong KongChina Department of Periodontics Hunan Key Laboratory of Oral Health Research&Hunan 3D Printing Engineering Research Center of Oral Care&Hunan Clinical Research Center of Oral Major Diseases and Oral Health&Xiangya Stomatological Hospital&Xiangya School of StomatologyCentral South UniversityChangshaHunanChina Department of Mechanical engineering University of BathBathUK

Our feet are often subjected to moist and warm environments,which can promote the growth of harmful bacteria and the development of severe infection in wounds located in the *** a result,there is a need for new and innovative strategies to safely sterilize feet,when shoes are worn,to prevent any potential foot-related *** this paper,we have produced a non-destructive,biocompatible and convenient-to-use insole by embedding a BaTiO3(BT)ferroelectric material into a conventional polydimethylsilane(PDMS)insole material to exploit a ferroelectric catalytic effect to promote the antibacterial and healing of infected wounds via the ferroelectric charges generated during *** formation of reactive oxygen species generated through a ferroelectric catalytic effect in the PDMS-BT composite is shown to increase the oxidative stress on bacteria and decrease both the activity of bacteria and the rate of formation of bacterial *** addition,the ferroelectric field generated by the PDMS-BT insole can enhance the level of transforming growth factor-beta and CD31 by influencing the endogenous electric field of a wound,thereby promoting the proliferation,differentiation of fibroblasts and *** work therefore provides a new route for antimicrobial and tissue reconstruction by integrating a ferroelectric biomaterial into a shoe insole,with significant potential for health-related applications.

关键词： ferroelectric filed effect PDMS-BaTiO3 insole piezo-catalysis wound healing

Effect of crystal morphology of ultrahigh-nickel cathode materials on high temperature electrochemical stability of lithium ion batteries

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Journal of Energy chemistry 2024年第1期88卷 327-335,I0008页

作者： Bi luo Hui Li Haoyu Qi Yun Liu Chuanbo Zheng Weitong Du Jiafeng Zhang Lai Chen school of Metallurgy engineering Jiangsu University of Science and TechnologyZhangjiagang 215600JiangsuChina National engineering Laboratory for High-Efficiency Recovery of Refractory Nonferrous Metals School of Metallurgy and EnvironmentCentral South UniversityChangsha 410083HunanChina school of Materials Science and engineering Beijing Key Laboratory of Environmental Science and EngineeringBeijing Institute of TechnologyBeijing 100081China

Higher nickel content endows Ni-rich cathode materials LiNi_(x)Co_yMn_(1-x-y)O_(2.(x>0.6)with higher specific capacity and high energy density,which is regarded as the most promising cathode materials for Li-ion ***,the deterioration of structural stability hinders its practical application,especially under harsh working conditions such as high-temperature *** these circumstances,it becomes particularly critical to clarify the impact of the crystal morphology on the structure and high-temperature performance as for the ultrahigh-nickel ***,we conducted a comprehensive comparison in terms of microstructure,high-temperature long-cycle phase evolution,and high-temperature electrochemical stability,revealing the differences and the working mechanisms among polycrystalline(PC),single-crystalline(SC)and Al doped SC ultrahigh-nickel *** results show that the PC sample suffers a severe irreversible phase transition along with the appearance of microcracks,resulting a serious decay of both average voltage and the energy *** the Al doped SC sample exhibits superior cycling stability with intact layered ***-situ XRD and intraparticle structural evolution characterization reveal that Al doping can significantly alleviate the irreversible phase transition,thus inhibiting microcracks generation and enabling enhanced ***,it exhibits excellent cycling performance in pouch-type full-cell with a high capacity retention of 91.8%after 500 cycles at 55℃.This work promotes the fundamental understanding on the correlation between the crystalline morphology and high-temperature electrochemical stability and provides a guide for optimization the Ni-rich cathode materials.

关键词： Single-crystalline Ultrahigh-nickel cathode High-temperature performance Phase evolution

The possible effect of the proBDNF on the rat retina following acute high intraocular pressure injury

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The possible effect of the proBDNF on the rat retina followi...

High-performance wearable bimetallic nanowire-assisted composite foams for efficient electromagnetic interference shielding,infrared stealth,and piezoresistive sensing

中国神经科学学会第四次会员代表大会暨第八届全国学术会议

作者： Hui WANG,Dan CHEN,Xiao-qiong WU,Ju-Fang HUANG,Xue-Gang luo~* Department of Human Anatomy & Neurobiology,Xiangya {2. of Medicine,central south university,changsha, 410013,china

＜正＞Objective To investigate the biological function of brain-derived neurotrophic factor precursor（proBDNF） by observing the possible role on rat retinal ganglion cells（RGCs） after acute high intraocular pressure（HIOP）.Methods Adult SD rats were divided into high intraocular pressure without treatment（HIOP）,proBDNF antiserum pre-treated, normal goat serum pre-treated/HIOP（NGS/HIOP） and proBDNF antiserum pre-treated /HIOP *** left eyes of last three groups received intravitreal injection of NGS or proBDNF *** days later,the intraocular pressure of all left eyes of HIOP,NGS/HIOP and proBDNF antiserum/HIOP groups was increased to（102.4±9.2.mmHg,which makes b wave of flash electroretinogram disappear,and then maintained for 60 *** right eyes served as normal control groups. 1,3,7 days later,rat retina was stained by Niss1,Hoechst and *** The arrangement of neurons was clear and regular in normal control group by Niss1 *** NGS/HIOP group,the morphological changes were similar to that of HIOP *** HIOP,the cell number and the thickness of inner retina were significantly *** with NGS/HIOP group,there are some TUNEL positive cells located at the ganglion cell layer and the Niss1 staining cell number was significantly decreased,the structure was also disturbed and many Hoechst positive cells were distributed diffusely in the inner retina of proBDNF antiserum/ HIOP *** retinal morphology in proBDNF antiserum treated group was similar to that in normal *** It suggested that proBDNF,like mature BDNF,promoted retinal ganglion cells survival.

关键词： proBDNF high intraocular pressure(HIOP) rat

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Nano Research 2024年第7期17卷 6757-6765页

作者： Tianyi Hang Lijie Zhou Chenhui Xu Yiming Chen Jiahui Shen Jiajia Zheng Pingan Yang Xiping Li Heng luo Guoxiu Tong Key Laboratory of Urban Rail Transit Intelligent Operation and Maintenance Technology and Equipment of Zhejiang Province College of EngineeringZhejiang Normal UniversityJinhua 321004China school of Automation Chongqing University of Posts and TelecommunicationsChongqing 400065China State Key Laboratory of Powder Metallurgy Central South UniversityChangsha 410083China Key Laboratory of the Ministry of Education for Advanced Catalysis Materials College of Chemistry and Materials ScienceZhejiang Normal UniversityJinhua 321004China

With the accelerated development of modern detection and communication technology,the multifunctional wearable materials with excellent electromagnetic interference(EMI)shielding,infrared stealth,and human monitoring for improving military combat capability have received extensive *** this work,the lightweight melamine foam(MF)@silver nanowires(AgNWs)-iron nanowires(FeNWs)(AgFe-MF)was fabricated by a vacuum-assisted dip-coating *** to the porous structure and synergistic electrical and magnetic losses,this lightweight(0.115 g/cm^(3))composite foam with an ultra-low filler content(0.62.vol.%)exhibited an ideal EMI shielding efficiency of 38.4 *** the other hand,the AgFe-MF realized a powerful multifunctional *** surface saturation temperature of the AgFe-MF reached 94.2.under a low applied voltage of 1.8 V and remained extremely fast heating and cooling response and terrific working stability,resulting in excellent infrared stealth and camouflage ***,taking virtues of the elastic porous conductive architecture,the AgFe-MF was utilized as a piezoresistive sensor exhibiting board compressive interval of 0–1.62.kPa(50%strain)with a good sensitivity of 0.57 kPa^(−1).This work will provide new ideas and insights for developing multifunctional wearable devices in the fields of EMI shielding,thermal management,and piezoresistive sensing.

关键词： metal nanowires porous foams electromagnetic interference shielding infrared stealth wearable sensors

Harnessing antimicrobial peptide-coupled photosensitizer to combat drug-resistant biofilm infections through enhanced photodynamic therapy

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Acta Pharmaceutica Sinica B 2024年第4期14卷 1759-1771页

作者： Duoyang Fan Xiaohui Liu Yueming Ren Ziheng luo Yanbing Li Jie Dong Seraphine VWegner Fei Chen Wenbin Zeng Xiangya school of Pharmaceutical Sciences Central South UniversityChangsha 410013China Hunan Key Laboratory of Diagnostic and Therapeutic Drug Research for Chronic Diseases Central South UniversityChangsha 410013China Sir William Dunn school of Pathology University of OxfordOxford OX13REUK Xiangya Hospital of central south university Changsha 410013China Institute of Physiological chemistry and Pathobiochemistry University of MünsterMünster 48149Germany

Bacterial biofilm-associated infection was one of the most serious threats to human health. However, effective drugs for drug-resistance bacteria or biofilms remain rarely reported. Here, we propose an innovative strategy to develop a multifunctional antimicrobial agent with broad-spectrum antibacterial activity by coupling photosensitizers (PSs) with antimicrobial peptides (AMPs). This strategy capitalizes on the ability of PSs to generate reactive oxygen species (ROS) and the membrane-targeting property of AMPs (KRWWKWIRW, a peptide screened by an artificial neural network), synergistically enhancing the antimicrobial activity. In addition, unlike conventional aggregation-caused quenching (ACQ) photosensitizers, aggregation-induced emission (AIE) PSs show stronger fluorescence emission in the aggregated state to help visualize the antibacterial mechanism. In vitro antibacterial experiments demonstrated the excellent killing effects of the developed agent against both Gram-positive (G^(+)) and Gram-negative (G^(–)) bacteria. The bacterial-aggregations induced ability enhanced the photoactivatable antibacterial activity against G^(–) bacteria. Notably, it exhibited a significant effect on destroying MRSA biofilms. Moreover, it also showed remarkable efficacy in treating wound infections in mice in vivo. This multifunctional antimicrobial agent holds significant potential in addressing the challenges posed by bacterial biofilm-associated infections and drug-resistant bacteria.

关键词： Photodynamic therapy Antimicrobial peptides Multidrug-resistant bacteria Aggregation-induced emission Anti-biofilm

The study of mechanism of precursor for brain-derived neurotrophic factor on hippocampal neuron survival

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The study of mechanism of precursor for brain-derived neurot...

Residual alkali-evoked cross-linked polymer layer for anti-air-sensitivity LiNi_(0.89)Co_(0.06)Mn_(0.05)O_(2.cathode

中国神经科学学会第四次会员代表大会暨第七届全国学术会议

作者： Hui WANG,Dan CHEN,Xiao-qiong WU,Ju-Fang HUANG,Xue-Gang luo Department of Human Anatomy and Neurobiolog,Xiangya {2. of Medicine,central south university,changsha 410013

Objective To investigate the intracellular mechanism of proBDNF on neuron by detecting expression of ELKp, ERK and c-fos in cultured hippocampal *** The hippocampal neurons were dissociated from E18 rats and cutured in neurobasal *** the cells were treated with proBDNF,preBDNF and proBDNF antiserum,respectively. Thirty minutes,1 h or 48 h later,the cells were stained with Nissl solution and ELK-p,ERK2.c-fos immunocytochemistry were *** It showed that the expression of ELK-p,ERK and c-fos was significantly upregulated in cultured hippocampal neuron after treated with proBDNF protein,and sometimes the immunoreactivity was seen in some nucleous. Whereas the expression was downregulated with proBDNF antiserum treatment,and many cells exhibited swelling and *** immunoreactivity in preBDNF treated cells was similar to that in normal cultured *** It seems that proBDNF plays an important role in sustaining the hippocampal neuron survival through upregulating the ELK and ERK pathway.

关键词： proBDNF ERK ELK hippocampus

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Journal of Energy chemistry 2024年第5期92卷 450-458页

作者： Chao Zhao Xuebao Li Yun Zhao Jingjing He Yuanpeng Cao Wei luo Ding Wang Jianguo Duan Xianshu Wang Baohua Li National and Local Joint engineering Research Center of Lithium-ion Batteries and Materials Preparation Technology Key Laboratory of Advanced Battery Materials of Yunnan ProvinceFaculty of Metallurgical and Energy EngineeringKunming University of Science and TechnologyKunming 650093YunnanChina school of Materials Science and engineering Central South UniversityChangsha 410083HunanChina Institute of Materials Research Tsinghua Shenzhen International Graduate SchoolTsinghua UniversityShenzhen 518055Guangdong China City College Kunming University of Science and TechnologyKunming 650051YunnanChina

High-energy density lithium-ion batteries(LIBs)with layered high-nickel oxide cathodes(LiNi_(x)Co_(y)Mn_(1-x-y)O_(2.,x≥0.8)show great promise in consumer electronics and vehicular ***,LiNi_(x)Co_(y)Mn_(1-x-y)O_(2.faces challenges related to capacity decay caused by residual alkalis owing to high sensitivity to *** address this issue,we propose a hazardous substances upcycling method that fundamentally mitigates alkali content and concurrently induces the emergence of an anti-air-sensitive layer on the cathode *** the neutralization of polyacrylic acid(PAA)with residual alkalis and then coupling it with 3-aminopropyl triethoxysilane(KH550),a stable and ion-conductive cross-linked polymer layer is in situ integrated into the LiNi_(0.89)Co_(0.06)Mn_(0.05)O_(2.(NCM)*** characterization and measurements demonstrate its *** NCM material exhibits impressive cycling performance,retaining 88.4%of its capacity after 2.0 cycles at 5 C and achieving an extraordinary specific capacity of 170.0 mA h g^(-1) at 10 ***,this layer on the NCM efficiently suppresses unfavorable phase transitions,severe electrolyte degradation,and CO_(2.gas evolution,while maintaining commendable resistance to air *** surface modification strategy shows widespread potential for creating air-stable LiNi_(x)Co_(y)Mn_(1-x-y)O_(2.cathodes,thereby advancing high-performance LIBs.

关键词： Lithium-ion batteries Nickel-rich layered cathode Residual alkalis Cross-linked polyme rmodification Airsensitivity

Direct Regeneration of Spent Lithium-Ion Battery Cathodes:From Theoretical Study to Production Practice

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Nano-Micro Letters 2024年第10期16卷 304-336页

作者： Meiting Huang Mei Wang Liming Yang Zhihao Wang Haoxuan Yu Kechun Chen Fei Han Liang Chen Chenxi Xu Lihua Wang Penghui Shao Xubiao luo National-Local Joint engineering Research Center of Heavy Metals Pollutants Control and Resource Utilization Nanchang Hangkong UniversityNanchang 330063People's Republic of China Key Laboratory of Hunan Province for Advanced Carbon-based Functional Materials School of Chemistry and Chemical EngineeringHunan Institute of Science and TechnologyYueyang 414006People's Republic of China College of Materials Science and engineering Central South University of Forestry and TechnologyChangsha 410004People's Republic of China school of Life Science Jinggangshan UniversityJi'an 343009People's Republic of China

Direct regeneration method has been widely concerned by researchers in the field of battery recycling because of its advantages of in situ regeneration,short process and less pollutant *** this review,we firstly analyze the primary causes for the failure of three representative battery cathodes(lithium iron phosphate,layered lithium transition metal oxide and lithium cobalt oxide),targeting at illustrating their underlying regeneration mecha-nism and *** stripping of material from the collector to obtain pure cathode material has become a first challenge in recycling,for which we report several pretreatment methods currently available for subsequent regeneration *** review and discuss emphatically the research progress of five direct regeneration methods,including solid-state sintering,hydrothermal,eutectic molten salt,electrochemical and chemical lithiation ***,the application of direct regeneration technology in production practice is introduced,the problems exposed at the early stage of the industrialization of direct regeneration technol-ogy are revealed,and the prospect of future large-scale commercial production is *** is hoped that this review will give readers a comprehensive and basic understanding of direct regeneration methods for used lithium-ion batteries and promote the industrial application of direct regeneration technology.

关键词： Spent LIBs Failure reasons Cathode recycling Direct regeneration Production practice