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Ultrasensitive photochromism and impedance dual response to weak visible light by solvated Pb(Ⅱ) modified polyoxomolybdate

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Chinese Chemical Letters 2023年第2期34卷 567-571页

作者： Jiayuan Zhang Xinyu Wang Gui Wang Yi Feng Chunhui Zhang Tao Pang guanggang gao Linlin Fan Hong Liu School of Materials Science and Engineering University of JinanJinan 250022China College of Pharmacy Jiamusi UniversityJiamusi 154007China

Polyoxometalates (POMs) are important inorganic photochromic materials to be potentially applied in photo-induced switch,energy storage,and even the detection of ***,due to the limited sensitivity of POMs,it is difficult to realize the photochromic response to weak visible *** this paper,by the coordination of solvated Pb(Ⅱ),a new structure-defined chain-like polyoxomolybdate complex of[(Pb(DMF)_(4))^(3)(P_(2)Mo_(18)O_(62))_(2)]n(Pb_(3)Mo_(18) ,DMF=dimethylformamide) has been demonstrated by a facile solvent-diffusion *** virtue of interactions between Pb(DMF)_(4) and polyoxoanions,Pb_(3)Mo_(18) shows an ultrasensitive photochromic response to weak visible lights and forms the reduced’heteropoly blue’species through ligand-to-metal charge transfer (LMCT) process.A new mechanism is firstly proposed here that the 6s orbital lone electron pair on Pb(II) can effectively stabilize the generated hole of oxygen atoms as a result of O→Mo charge *** the proposed mechanism,the LMCT barrier is drastically lowered and allows the coloration to be occurred even upon weak visible ***,because the conductivity of Pb_(3)Mo_(18) enhances with the increase of reduction extent,its electrochemical impedance signals are proportionally response to irradiation ***,for the first time,the polyoxomolybdate composite can be used to detect weak visible light,in which the optical signal can be converted into electrical signal ***,Pb_(3)Mo_(18) can be drip-coated on the surface of the screen printed chip electrode,which is facile to the detection of light by portable devices compatible with computers,mobile phones and other electronic *** work not only highlights a new approach to the molecular design of photochromic POMs by the coordination of metal ions with the effect of inert electron pair,but also lays a foundation to extend the application of POMs as light signal sensors.

关键词： Photochromism Polyoxometalate Impedance Visible light Screen printed chip

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Direct conversion of furfural to levulinic acid/ester in dimethoxymethane:Understanding the mechanism for polymerization

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Green Energy & Environment 2019年第4期4卷 400-413页

作者： Yuewen Shao Xun Hu Zhanming Zhang Kai Sun guanggang gao Tao Wei Shu Zhang Song Hu Jun Xiang Yi Wang School of Material Science and Engineering University of JinanJinan250022China College of Materials Science and Engineering Nanjing Forestry UniversityNanjing210037JiangsuChina School of Energy and Power Engineering Huazhong University of Science and TechnologyWuhan430074China

This study investigated the conversion of furfural to 5-hydroxymethylfurfural(HMF)and further to levulinic acid/ester in dimethoxymethane under acidic conditions,with the particular focus on understanding the mechanism for polymer *** results showed that furfural could react with dimethoxymethane via electrophilic substitution reaction to form HMF or the ether/acetal of HMF,which were further converted to levulinic acid and methyl *** polymerization of furfural and the cross-polymerization between dimethoxymethane and the levulinic acid/ester produced were the main side reactions leading to the decreased yields of levulinic acid/*** to the other solvent,methanol as the co-solvent helped to alleviate but not totally inhibited the occurrences of the polymerization,as the polymerization reactions via aldol condensation did not eliminate the C=O *** a consequence,the polymerization reactions continued to *** co-solvent used such as guaiacol,dimethyl sulfoxide and acetone interfered with the transformation of furfural to HMF or aided the polymerization *** polymer produced from the reactions between furfural and DMM was different from that produced from levulinic acid/*** former had a higher crystallinity,while the latter was more *** DRIFTS and TG-MS studies showed that the polymer had the carboxylic group,methyl group and the aliphatic structure in the *** removal of these functionalities was accompanied by the aromatization of the *** condensation of DMM with levulinic acid/ester was the key reason for the diminished production of levulinic acid/ester.

关键词： polymerization methane dimethoxy

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Surface modification of hollow capsule by Dawson-type polyoxometalate as sulfur hosts for ultralong-life lithium-sulfur batteries

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Chinese Chemical Letters 2022年第9期33卷 4350-4356页

作者： Mingliang Wang Di Yin Yundong Cao Xinyang Dong guanggang gao Xun Hu Cheng Jin Linlin Fan Jian Yu Hong Liu School of Materials Science and Engineering Collaborative Innovation Center of Metal Nanoclusters&Photo/Electro-Catalysis and SensingUniversity of JinanJi’nan 250022China

Reasonable construction of sulfur host with high conductivity,large sulfur storage gap,strong chemical adsorption,and fast oxidation–reduction kinetics of polysulfide is very significant for its practical use in lithium-sulfur batteries(LSBs).In this paper,the surface modification of MIL-88A(Fe)is carried out by Dawson-type polyoxometalate(POM),and a hollow capsule shell material with P_(2)W_(18),Fe_(3)O_(4),and C components is synthesized by the subsequent carbonization *** applied as the sulfur host,the hollow capsule shell material can efficiently improve the conductivity of sulfur electrode and restrain the volumetric change of active sulfur while charging and *** this foundation,electrochemical analysis and density functional theory(DFT)calculation show that the P_(2)W_(18)on the outer layer of the capsule shell have effective electrocatalytic activity and potent chemical bond on the lithium polysulfides(LiPSs),which is helpful to block the shuttle ***,the as-assembled LSBs display the outstanding specific capacity and prominent cycle ***,it delivers an excellent reversible capacity of 1063 mAh/g after 100 cycles of charge–discharge at a rate of 0.5 C,accounting for a preservation by 96%in comparison to that of the initial ***,even after 2000 cycles at 1 C,the reversible specific capacity of 585 mAh/g can still be maintained with an average decay rate of only 0.021%.

关键词： Polyoxometalates Hollow capsule shell Catalytic activity Chemical bonding Lithium-sulfur batteries

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分子筛对膨胀阻燃聚丙烯性能的影响

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塑料科技 2011年第11期39卷 42-45页

作者：鲍文波高苏亮季洋张惠高广刚李斌黑龙江省润特科技有限公司黑龙江佳木斯154004 东北林业大学理学院黑龙江省阻燃材料分子设计与制备重点实验室黑龙江哈尔滨150040

以分子筛作为协效剂,与未加协效剂的膨胀阻燃剂(RTB-IFR)及其他助剂复配制成膨胀阻燃剂(IFR),用于聚丙烯(PP)的阻燃。研究了添加不同分子筛的IFR对PP的阻燃性能、力学性能及热降解行为的影响。结果表明:4A和H-BETA分子筛的阻燃效果比13X... 详细信息

以分子筛作为协效剂,与未加协效剂的膨胀阻燃剂(RTB-IFR)及其他助剂复配制成膨胀阻燃剂(IFR),用于聚丙烯(PP)的阻燃。研究了添加不同分子筛的IFR对PP的阻燃性能、力学性能及热降解行为的影响。结果表明:4A和H-BETA分子筛的阻燃效果比13X、ZSM分子筛好;分子筛对材料的力学性能影响不大;添加分子筛的阻燃剂改变了IFR和IFR-PP的热降解过程,提高了高温成炭量、炭层的热稳定性和热绝缘性,使IFR-PP的阻燃性能得到提高。

关键词：膨胀阻燃剂聚丙烯分子筛协效作用

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An Unprecedented One-dimensional Zigzag Chain Constructed from Triethanolamine Ligands[HN（CH2CH2O）3AsMo6O22]5- Unit and Manganese Ion Linkers

An Unprecedented One-dimensional Zigzag Chain Constructed fr...

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中国化学会2008年中西部地区无机化学、化工学术交流会

作者： Yanyan Yang Lin Xu~* guanggang gao Fengyan Li Xiaoshu Qu Key Laboratory of Polyoxometalates Science of Ministry of Education, College of Chemistry,Northeast Normal University, Changchun, 130024, P. R. China.

In recent years, polyoxometalates (POMs) have been found to be extremely versatile inorganic building blocks in view of their potential applications in medicine, materials, especially in catalysis. As a result, some P... 详细信息

关键词： CH2CH2O An Unprecedented One-dimensional Zigzag Chain Constructed from Triethanolamine Ligands[HN Unit and Manganese Ion Linkers

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Superior performance porous carbon nitride nanosheets for helium separation from natural gas:Insights from MD and DFT simulations

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Chinese Journal of Chemical Engineering 2021年第9期34卷 46-53页

作者： Zilong Liu Ge Zhao Xiao Zhang Lei gao Junqing Chen Weichao Sun guanggang Zhou Guiwu Lu Beijing Key Laboratory of Optical Detection Technology for Oil and Gas College of ScienceChina University of Petroleum(Beijing)Beijing 102249China Nano-Science Center Department of ChemistryUniversity of CopenhagenUniversitetsparken 52100 CopenhagenDenmark

Increasing helium(He)demand in fundamental research,medical,and industrial processes necessitates efficient He purification from natural ***,most theoretically available membranes focus on the separation of two or three kinds of gas molecules with He and the underlying separation mechanism is not yet well *** molecular dynamic(MD)and first-principle density function theory(DFT)simulations,we systematically demonstrated a novel porous carbon nitride membrane(g-C_(9)N_(7))with superior performance for He separation from natural *** structure of g-C_(9)N_(7) monolayer was optimized first,and the calculated cohesive energy confirmed its structural *** temperature from 200 to 500 K,the g-C_(9)N_(7)membrane revealed high He permeability,as high as 1.48×10^(7) GPU(gas permeation unit,1 GPU=3.35×10^(-10) mol·s^(-1)·Pa^(-1)·m^(-2))at 298 K,and also exhibited high selectivity for He over other gases(Ar,N_(2),CO_(2),CH_(4),and H_(2)S).Then,the selectivity of He over Ne was found to decrease with increasing the total number of He and Ne molecules,and to increase with increasing He to Ne *** interestingly,a tunable He separation performance can be achieved by introducing strain during membrane *** the condition of 7.5%compressive strain,the g-C_(9)(N_(7)(membrane reached the highest He over Ne selectivity of 9.41×10^(2).It can be attributed to the low energy barrier for He,but increased energy barrier for other gases passing through the membrane,which was subject to a compressive *** results offer important insights into He purification using g-C_(9)N_(7)membrane and opened a promising avenue for the screening of industrial grade gas separation with strain engineering.

关键词： Helium separation g-C_(9)N_(7)membrane Selectivity Permeability Molecular simulation

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血清白细胞衍生趋化因子2与糖尿病足患者炎症因子水平及预后的关系

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郑州大学学报（医学版） 2022年第6期57卷 854-857页

作者：夏伟杨毅涂凤萍高兵杜广刚四川省医学科学院·四川省人民医院内分泌科成都610072 四川省医学科学院·四川省人民医院烧伤科成都610072

目的:探究糖尿病足(DF)患者血清白细胞衍生趋化因子2(LECT2)与炎症因子水平以及预后的关系。方法:回顾性分析2020年3月至2021年9月我院收治的120例DF患者的临床资料,根据患者血清LECT2水平分组,<均值为A组(n=57),≥均值为B组(n=63),比... 详细信息

目的:探究糖尿病足(DF)患者血清白细胞衍生趋化因子2(LECT2)与炎症因子水平以及预后的关系。方法:回顾性分析2020年3月至2021年9月我院收治的120例DF患者的临床资料,根据患者血清LECT2水平分组,<均值为A组(n=57),≥均值为B组(n=63),比较两组患者一般资料、血脂、血糖、血清炎症因子水平和出院3个月后的足预后情况。结果:与A组相比,B组Wagner分级3级者所占比例较高,甘油三酯、低密度脂蛋白胆固醇及空腹血糖升高,高密度脂蛋白胆固醇水平降低,血清肿瘤坏死因子-α、白细胞介素-6以及C反应蛋白水平均升高(P<0.05)。A组足愈合率高于B组(86.0%vs 69.8%,P<0.05)。结论:血清LECT2高水平的DF患者病情更严重;血清LECT2水平升高可能提示预后不良。

关键词：糖尿病足白细胞衍生趋化因子2 炎症预后

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NPWT在儿童深度烧伤创面植皮术后的应用研究

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成都医学院学报 2018年第4期13卷 452-455页

作者：李巍杜广刚陈博高兵四川省医学科学院.四川省人民医院烧伤科成都610072

目的比较儿童深度烧伤创面植皮术后应用负压封闭引流技术(negative pressure wound therapy,NPWT)与传统打包加压固定的临床应用效果。方法回顾性分析2014年6月至2017年6月四川省医学科学院·四川省人民医院烧伤科收治的60例儿童深度烧... 详细信息

目的比较儿童深度烧伤创面植皮术后应用负压封闭引流技术(negative pressure wound therapy,NPWT)与传统打包加压固定的临床应用效果。方法回顾性分析2014年6月至2017年6月四川省医学科学院·四川省人民医院烧伤科收治的60例儿童深度烧伤并施行植皮手术修复的临床资料,根据植皮术后固定材料及方式不同分为治疗组(负压治疗)30例和对照组(传统打包)30例。两组患儿均于术后7d拆除敷料,常规换药至创面完全愈合。比较两组患儿植皮术后7d皮片成活率、14d创面愈合率、创面细菌感染率、术后住院时间及创面愈合时间。结果治疗组患儿的术后7d植皮成活率为(97.2±2.7)%,高于对照组(88.2±11.5)%;治疗组患儿的14d创面愈合率为(99.2±1.2)%,高于对照组(85.9±7.8)%;治疗组患儿的创面细菌感染率6.7%(2/30)低于对照组30.0%(9/30);治疗组患儿的术后住院日为(10.2±1.8)d,短于对照组(15.3±3.7)d;治疗组的创面愈合时间为(11.3±2.5)d,短于对照组(17.4±5.1)d。结论在儿童深度烧伤创面植皮术后,应用负压封闭引流技术固定移植皮片,在提高移植皮片成活率、降低术区感染率、缩短创面愈合时间及减少术后住院时间等方面优于传统固定方法。

关键词：负压封闭引流技术儿童烧伤植皮术

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天津地区波纹龙虾的工厂化养殖试验

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河北渔业 2023年第11期 28-29页

作者：孙志新唐广刚孙钊高哲颖天津市滨海新区农业农村发展服务中心天津300450

为探讨波纹龙虾(Panulirus homarus)工厂化养殖技术,于2020年进行了波纹龙虾养殖试验,通过采用光照调控、放置遮蔽物、水质调控、饵料投喂、疾病防治等技术,养殖成活率达到80%,平均规格0.72 kg/尾,平均产量4.6 kg/m^(2)。

关键词：波纹龙虾(Panulirus homarus) 工厂化养殖天津

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一种具有U型换热管束的水浴式汽化器的设计

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广州化工 2021年第14期49卷 124-125,138页

作者：高生明王开兵许高坡楼旭铼广州广钢气体能源股份有限公司广东广州511458

水浴式汽化器作为一种热交换的设备在低温液体汽化和空气设备中得到广泛应用。根据水浴式汽化器的工作原理及分类,以及现有水浴式汽化器存在的设计结构缺陷、换热管易泄露、维修困难、只能实现单种液体的汽化等缺点,本文论述了一种新型... 详细信息

水浴式汽化器作为一种热交换的设备在低温液体汽化和空气设备中得到广泛应用。根据水浴式汽化器的工作原理及分类,以及现有水浴式汽化器存在的设计结构缺陷、换热管易泄露、维修困难、只能实现单种液体的汽化等缺点,本文论述了一种新型的具有U型换热管束结构的水浴式汽化器,该水浴式汽化器可以对不同类的液体进行汽化;即便当U型换热管出现泄露问题时,可将密封头及U型换热管从筒体上拆卸下来,从而方便检修,并且能够同时更换备用的U型换热管,从而达到不影响生产的目的。

关键词：水浴式汽化器换热部件 U型换热管束

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