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Bioinspired multichannel colorful encryption through kirigami activating grating

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Science Bulletin 2023年第3期68卷 276-283,M0003页

作者： Xiaoyu Hou Florian Vogelbacher Xintao Lai Kaixuan li Yanlin Song Mingzhu li Key Laboratory of Green Printing Institute of ChemistryChinese Academy of SciencesBeijing 100190China school of chemical Sciences University of Chinese Academy of SciencesBeijing 100049China Key Laboratory of Materials Processing and Mold of the Ministry of Education Zhengzhou UniversityZhengzhou 450002China

Optical encryption,exploiting degrees of freedom of light as parameters to encode and decode information,plays an indispensable role in our daily *** structural color materials can give real-time visible feedback to external stimuli and provide ideal candidates for optical ***,the development of existing responsive structural color materials is hindered by poor repeatability and long feedback ***,there are only few strategies to exploit structural colors in multichannel information ***,bioinspired by the structural color variation due to a change in angle arising from the movement of animal’s scales or feathers,we developed a general multichannel information encryption strategy using a two-dimensional deformable kirigami arranging orientations of the grating arrays by *** kirigami grating sheet shows rapid,repeatable,and programmable color *** strategy utilizes the topological space deformation to guide the change of optical property,which suggests new possibilities for spatial and spectral encryption as well as mechano-sensing and camouflage.

关键词： Structural color Encryption Kirigami Grating Color change

铑基非均相催化剂在烯烃氢甲酰化反应中的应用研究进展

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低碳化学与化工 2024年第3期49卷 18-29页

作者：陈万孙功成张勇李尧莹范素兵吕俊敏赵天生宁夏大学化学与化工学院省部共建煤炭高效利用与绿色化工国家重点实验室宁夏银川750021

烯烃氢甲酰化反应是工业中合成醛的重要过程,铑基均相催化剂难以回收的缺点会大大增加烯烃氢甲酰化反应的成本。负载固相多相催化剂因其简便的分离循环操作而广受关注,但存在反应活性较差、金属流失量较大和催化剂制备成本较高等问题,... 详细信息

烯烃氢甲酰化反应是工业中合成醛的重要过程,铑基均相催化剂难以回收的缺点会大大增加烯烃氢甲酰化反应的成本。负载固相多相催化剂因其简便的分离循环操作而广受关注,但存在反应活性较差、金属流失量较大和催化剂制备成本较高等问题,开发催化性能和回收性能好的非均相铑基催化剂具有广阔的前景。以无机固体载体固定化催化剂、HRh(CO)(PPh_(3))_(3)封装型多相催化剂、多孔有机配体(POL)材料负载催化剂和单原子金属间纳米催化剂这4类催化剂为主线,综述了用于烯烃氢甲酰化反应中多相负载型铑基催化剂的研究进展。在多相负载型铑基催化剂中,膦配体组成及制备条件、载体种类及性质和铑与其他金属协同作用等均能对其催化烯烃氢甲酰化反应的催化性能产生影响,对上述4类催化剂的优、缺点和发展前景进行了简要分析。在今后的研究中,建议设计给电子能力强、空间位阻大的膦配体,发掘高比表面积、多级孔道结构的无机/有机载体,深入探究金属纳米粒子间的相互作用,进一步提高铑基催化剂在烯烃氢甲酰化中的催化性能和回收性能。

关键词：烯烃氢甲酰化非均相催化剂铑基催化剂

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侧链衍生季铵盐型氯胺的合成及抗菌应用

应用化学 2024年第7期41卷 966-975页

作者：李令东张颂伟张维伦刘鹏飞于江际鸣周豪大连理工大学精细化工国家重点实验室盘锦124221 大连理工大学化工海洋与生命学院盘锦124221

以5,5-二甲基海因(DMH)为原料,设计合成了一系列侧链衍生的季铵盐型氯胺抗菌剂(10-14),表征了前体和氯胺结构。以大肠杆菌(***)和金黄葡萄球菌(***)为模式菌株,以三甲基季铵盐氯胺1为对照,初步测试了氯胺10-14的抗菌活性。结果表明,氯胺... 详细信息

以5,5-二甲基海因(DMH)为原料,设计合成了一系列侧链衍生的季铵盐型氯胺抗菌剂(10-14),表征了前体和氯胺结构。以大肠杆菌(***)和金黄葡萄球菌(***)为模式菌株,以三甲基季铵盐氯胺1为对照,初步测试了氯胺10-14的抗菌活性。结果表明,氯胺10-13抗菌能力随侧链变长先增强后减弱,其中三丁基季铵盐氯胺12对***和***的杀灭对数(KL)值分别为1.07±0.09和6.49,表现出这一系列中相对更优的抗菌活性,这可能是12达到了分子触杀所需的最佳亲疏水平衡状态,与菌体细胞膜作用更强所致。此外,携羟乙基侧链氯胺14实现了对***和***全杀,展现了10-14中最出色的抗菌性能,这可能和氯胺分子更易穿透菌体细胞膜有关。本工作制备的一系列高活性季铵盐氯胺抗菌剂,为更高效离子型氯胺抗菌剂的设计研发提供了参考借鉴。

关键词：季铵盐型氯胺多步合成抗菌活性亲疏水平衡侧链衍生物

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The first application of isoindigo-based polymers in non-fullerene organic solar cells

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Science china chemistry 2020年第9期63卷 1262-1271页

作者： Bao Zhang Ning An Hongbo Wu Yanfang Geng Yanming Sun Zaifei Ma Weiwei li Qiang Guo Erjun Zhou Henan Institutes of Advanced Technology Zhengzhou UniversityZhengzhou 450003China CAS Key Laboratory of Nanosystem and Hierarchical Fabrication CAS Center for Excellence in NanoscienceNational Center for Nanoscience and TechnologyBeijing 100190China school of chemistry Beihang UniversityBeijing 100191China Center for Advanced Low-dimension Materials College of Materials Science and EngineeringDonghua UniversityShanghai 201620China State Key Laboratory of Organic-Inorganic Composites Beijing University of Chemical TechnologyBeijing 100029China

Although isoindigo(IID)-based polymers can realize high charge mobility,these materials are currently confined to fullerenebased organic solar cells(OSCs).Herein,we designed a pair of alternative D-π-A type copolymers,PE71 and PE72,to expand the application in non-fullerene OSCs,where benzo[1,2-b:4,5-b′]thiophene(BDT),thieno[3,2-b]thiophene(TT)and IID units were used as D,A andπ-bridge,*** aim of optimizing the length of alkyl chains on TT bridge is to ensure polymer solubility,crystallinity as well as miscibility with acceptor *** find that PE71 and PE72 exhibit similar optical and electronic properties,but PE71 with shorter hexyl chain tends to aggregate into fiber-like *** the end,Y6 is selected as the electron acceptor because of suitable energy levels and complementary absorption ***,PE71:Y6 device realizes a power conversion efficiency(PCE)of 12.03%,which is obviously higher than that of PE72:Y6 device(9.74%)and is also the highest value for IID-based photovoltaic *** charge transport,molecular aggregation,film morphology and energy loss analysis were systematically *** improved photovoltaic performance of PE71:Y6 mainly originates from the better interpenetrating network structure toward facilitating exciton seperation and free charge carrier *** results indicate that IID-based D-π-A polymers can also be utilized in non-fullerene OSCs and the alkyl chains on the thieno[3,2-b]thiopheneπ-bridge have a vital effect on the photovoltaic performance.

关键词： isoindigo thieno[3,2-b]thiophene alkyl chain non-fullerene organic solar cells

Recent Advances in Carbon-Based Adsorbents for Adsorptive Separation of light Hydrocarbons

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Research 2022年第4期2022卷 261-281页

作者： Yong-Sheng Wang Xue-Jie Zhang Ya-Qi Ba Tian-Yi li Guang-Ping Hao An-Hui Lu State Key Laboratory of Fine chemicals Liaoning Key Laboratory for Catalytic Conversion of Carbon ResourcesSchool of Chemical EngineeringDalian University of TechnologyDalian 116024China

light hydrocarbons(LHs)separation is an important process in petrochemical *** current separation technology predominantly relies on cryogenic distillation,which results in considerable energy *** separation using porous solids has received widespread attention due to its lower energy footprint and higher ***,tremendous efforts have been devoted to the design and synthesis of high-performance porous *** them,porous carbons display exceptional stability,tunable pore structure,and surface chemistry and thus represent a class of novel adsorbents upon achieving the matched pore structures for LHs *** this review,the modulation strategies toward advanced carbonbased adsorbents for LHs separation are firstly ***,the relationships between separation performances and key structural parameters of carbon adsorbents are discussed by exemplifying specific separation *** research findings on the control of the pore structures as well as the quantification of the adsorption sites are ***,the challenges of carbonaceous adsorbents facing for LHs separation are given,which would motivate us to rationally design more efficient absorbents and separation processes in future.

关键词： separation adsorbent porous

Al_(2)(SO_(4))_(3)催化热解油转化生产酯类燃料

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河北科技大学学报 2024年第3期45卷 283-289页

作者：罗丹夏淑倩郭丽潇韩建荣蒋可为郝全爱李娇中国辐射防护研究院山西太原030000 天津大学化工学院天津300072 河北科技大学理学院河北石家庄050018

酸类、糖类等不稳定组分的存在是制约热解油直接用作生物燃料的主要因素。为了解决此问题,提出采用Al_(2)(SO_(4))_(3)催化剂将这些不稳定成分酯化为燃料类化合物的途径。首先,分别以单模型化合物左旋葡萄糖或乙酸为原料,考察各种金属... 详细信息

酸类、糖类等不稳定组分的存在是制约热解油直接用作生物燃料的主要因素。为了解决此问题,提出采用Al_(2)(SO_(4))_(3)催化剂将这些不稳定成分酯化为燃料类化合物的途径。首先,分别以单模型化合物左旋葡萄糖或乙酸为原料,考察各种金属硫酸盐催化其转化制备乙酰丙酸乙酯或乙酸乙酯的能力,筛选出催化性能最好的催化剂;其次,以左旋葡萄糖和乙酸的模型混合物为原料,探究Al_(2)(SO_(4))_(3)催化同时转化制备酯类的最佳反应条件;最后,以真实热解油为原料,验证Al_(2)(SO_(4))_(3)在最佳反应条件下催化酯化的可行性。结果表明,酯化后热解油中大部分酸、糖、醛消失,同时产生大量的酯和缩醛,酯类和缩醛类占改性热解油总色谱面积的39.5%。Al_(2)(SO_(4))_(3)能有效将热解油中的酸类、糖类等不稳定组分酯化为燃料类化合物,可为热解油转化制备生物燃料提供借鉴。

关键词：催化化学热解油乙酰丙酸乙酯乙酸乙酯 Al_(2)(SO_(4))_(3)

A Fast and Room-temperature Self-healing Thermal Conductive Polymer Composite

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Chinese Journal of Polymer Science 2021年第10期39卷 1328-1336,I0008页

作者： De-Wei Yue Hong-Qin Wang Han-Qing Tao Peng Zheng Cheng-Hui li Jing-lin Zuo State Key Laboratory of Coordination chemistry School of Chemistry and Chemical EngineeringNational Laboratory of MicrostructuresCollaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing 210023China

Thermal conducting materials may be damaged during long-term use,resulting in the increase of thermal resistance and therefore inefficient heat *** introduction of self-healing ability may solve this problem,but the realization of fast and room-temperature self-healing in thermal conducting composites is quite ***,we choose a flexible poly(dimethylsiloxane)polymer material(PDMS-COOH)as the matrix and graphene nanosheets as the thermal conductive filler to prepare a new kind of thermal conductive polymer composite(PDMS-COOH-CG)that can quickly self-heal at room *** thermal conductivity of PDMS-COOH-CG10 with 10%of graphene content is 0.48 W·m^(-1)·K^(-1),which is 16 times that of PDMS-COOH(0.03 W·m^(-1)·K^(-1)).At room temperature,self-healing efficiency of PDMS-COOH-CG10 based on tensile strength can be 53.8%for 30 s and 84.6%for 24 *** infrared thermal imaging dipicted that after 2 min of self-healing at room temperature,the thermal conduction temperature near the damage was basically restored to the level of the pristine sample.

关键词： Self-healing Thermal conductive Infrared thermal imaging

Process mineralogy of Dalucao rare earth ore and design of beneficiation process based on AMICS

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Rare Metals 2020年第8期39卷 959-966页

作者： Yu Jiao Ke-Hui Qiu Pei-Cong Zhang Jun-Feng li Wen-Tao Zhang Xian-Fei Chen school of Materials and chemistry and chemical engineering Chengdu University of TechnologyChengdu 610059China school of Science Xichang UniversityXichang 615000China Institute of Materials Science and Technology Chengdu University of TechnologyChengdu 610059China

The test results of the automated mineral identification and characterization system(AMICS),including the mineral composition,particle size distribution,dissemination state and degree of liberation of the target minerals,could be used to improve the beneficiation *** the Dalucao rare earth ore located in Dechang,Sichuan Province,china(with an average content of 2.40 wt%)as the research object in this paper,the chemical composition,phase composition and dissemination state of the minerals were tested by AMICS,and the minerals of different fineness were *** concentrate yield,grade and recovery rate of the minerals of different fineness were compared through flotation *** the grinding lasted for 5 min and 82.60%of mineral grains passed through the-74-μm sieve,the yield,grade and recovery rate could reach 20.19%,8.75%and 73.64%,respectively(as the best grinding fineness),under the same flotation conditions.

关键词： Automated mineral identification and characterization system(AMICS) Bastnasite Dalucao Flotation

Identification of the hydrogen utilization pathway for the electrocatalytic hydrogenation of phenol

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Science china chemistry 2021年第9期64卷 1586-1595页

作者： ling Zhou Xiaorong Zhu Hui Su Hongzhen lin Yanhong Lyu Xu Zhao Chen Chen Nana Zhang Chao Xie Yingying li Yuxuan Lu Jianyun Zheng Benrt Johannessen San Ping Jiang Qinghua liu Yafei li Yuqin Zou Shuangyin Wang State Key Laboratory of Chem/Bio-Sensing and Chemometrics Provincial Hunan Key Laboratory for Graphene Materials and DevicesCollege of Chemistry and Chemical Engineeringthe National Supercomputer Centers in ChangshaHunan UniversityChangsha410082China College of chemistry and Materials Science Nanjing Normal UniversityNanjing210023China National Synchrotron Radiation Laboratory University of Science and Technology of ChinaHefei230026China i-LAB Suzhou Institute of Nano-Tech and Nano-Bionics(SINANO)Chinese Academy of SciencesSuzhou215123China Department of Educational Science Hunan First Normal UniversityChangsha410205China Australian Synchrotron ClaytonVictoria3168Australia Western Australian school of Mines:Minerals Energy and Chemical Engineering and Fuels and Energy Technology InstituteCurtin UniversityPerthWA6102Australia

Electrochemical hydrogenation(ECH)of biomass-derived platform molecules is a burgeoning route for the sustainable utilization of ***,the noble-metal-catalyzed ECH of phenolic compounds suffers from intense competition with hydrogen evolution *** prepared Pt Rh bimetallic nanoparticles dispersed on highly ordered mesoporous carbon nanospheres,which improves the utilization efficiency of adsorbed hydrogen(H_(ad))to ECH in H-UPD region(>0 V ***).Further analysis reveals(i)the strong overlapping between the d-orbitals of Pt and Rh enhances specific adsorption of phenol;(ii)incorporation of Rh devotes an electronic effect on weakening the alloy-H_(ad)interaction to increase the FE of *** calculations confirm the selectivity difference and the ECH parallel pathways:cyclohexanol and cyclohexanone are formed via hydrogenation/dehydrogenation of the intermediate ^(*)C_(6)H_(10) *** findings deepen our fundamental understanding of the ECH process,and cast new light on exploration of highly efficient electrocatalysts for biomass upgrading.

关键词： electrohydrogenation aromatic hydrogenation biomass conversion Pt Rh alloy