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High performance and stable pure-blue quasi-2D perovskite light-emitting diodes by multifunctional zwitterionic passivation engineering

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Advanced Photonics 2024年第2期6卷 32-40页

作者： Chao Shen Shuyan Fang Jibin Zhang Xiangfei Liang Chenhui Su Jian Qing Wanzhu Cai yunhan Luo Renqiang yang Lintao Hou Jinan University College of Physics and Optical EngineeringGuangdong Provincial Engineering Technology Research Center of Vacuum Coating Technologies and New Energy MaterialsGuangzhou Key Laboratory of Vacuum Coating Technologies and New Energy MaterialsGuangzhouChina Jinan University College of Physics and Optical EngineeringGuangdong Provincial Key Laboratory of Optical Fiber Sensing and CommunicationsGuangzhouChina Zhengzhou University School of Physics and MicroelectronicsKey Laboratory of Materials Physics of Ministry of EducationZhengzhouChina Jinan University Key Laboratory of Optoelectronic Information and Sensing Technologies of Guangdong Higher Education InstitutesGuangzhouChina Jianghan University School of Optoelectronic Materials and TechnologyKey Laboratory of Optoelectronic Chemical Materials and Devices of Ministry of EducationWuhanChina

Despite the rapid advances of red and green perovskite light-emitting diodes(Pe LEDs),achieving high brightness with high external quantum efficiency(EQE)remains a challenge for the pure-blue Pe LEDs,which greatly hinders their practical applications,such as white-light illumination and in optical communication as a high-speed and low-loss light source.Herein,we report a high-performance pure-blue Pe LED based on mixed-halide quasi-2D perovskites incorporated with a zwitterionic molecule of 3-(benzyldimethylammonio)propanesulfonate(3-BAS).Experimental and density functional theory analysis reveals that 3-BAS can simultaneously eliminate non-radiative recombination loss,suppress halide migration,and regulate phase distribution for smoothing energy transfer in the mixed-halide quasi-2D perovskites,leading to the final perovskites with high photoluminescence quantum yield and robust spectrum stability.Thus,the highperformance pure-blue Pe LED with a recorded brightness with 1806 cd m-2and a relative higher EQE of 9.25%is achieved,which is successfully demonstrated in a visible light communication system for voice signal transmission.We pave the way for achieving highly efficient pure-blue Pe LEDs with great application potential in future optical communication networks.

关键词： pure-blue PeLEDs quasi-2D perovskite zwitterionic additive visible light communication

Self-assembled Nanosheets of Perylene Monoamide Derivative as Sensitive Fluorescent Biosensor for Exonuclease Ⅲ Activity

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Chemical Research in Chinese Universities 2022年第6期38卷 1497-1503页

作者： QIN yang yang yunhan HE Ran ZHOU Laicheng ZHANG Ling PCFM Lab and GDHPRC Lab School of ChemistrySun Yat-sen UniversityGuangzhou510275P.R.China

Enzymes containing 3′→5′exonuclease activities play an important role in various key cellular and physiological processes.The development of fluorescence biosensor is an efficient method to detecting enzyme activity.Herein,a fluorescence resonance energy transfer(FRET)“on”and“off”strategy for detecting exonuclease III(Exo III)activity has been developed.We report here that the double-stranded DNA(dsDNA)enables to bind tightly to self-assembled nanosheets of cationic perylene monoimide derivative(PMI-O7)through electrostatic interaction,and the 6-carboxyfluorescein(FAM)-modified dsDNA could be efficiently quenched via FRET between FAM and PMI-O7.Upon the addition of Exo III,the dsDNA will be digested and the FAM fluorophore will be released,resulting in the fluorescence recovery of FAM.This method provides a simple and sensitive biosensor platform with a low detection limit of 0.077 U/mL for Exo III.Importantly,this method exhibits similar and calibration curves for the detection of Exo III in both buffer and fetal bovine serum samples,indicating that this platform has potential to detect Exo III activity in complex samples.

关键词： Nanosheet Fluorescence biosensor Enzymatic reaction

Liquid Crystal Based Label-Free Optical Sensors forBiochemical Application

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Photonic Sensors 2024年第2期14卷 57-88页

作者： Jieyuan TANG Zhibin LI Mengyuan XIE yunhan LUO Jianhui YU Guojie CHEN Zhe CHEN School of Physics and Optoelectronic Engineering Foshan UniversityFoshan 528225China Guangdong-Hong Kong.Macao Joint Laboratory for Intelligent Micro-Nano Optoelectronic Technology Foshan UniversiyFoshan 528225China Key Laboratory of Optoelectronic Information and Sensing Technologies of Guangdong Higher Education Institutes Jinan UniversityGuangzhou 510632.China Department of Optoelectronic Engineering Jinan UniversityGuangzhou 510632China JiHua Laboratory Foshan 528200China

Biochemical sensors have important applications in biology,chemistry,and medicine.Nevertheless,many biochemical sensors are hampered by intricate techniques,cumbersome procedures,and the need for labeling.In the past two decades,it has been discovered that liquid crystals can be used to achieve the optical amplification of biological interactions.By modifying recognition molecules,a variety of label-free biochemical sensors can be created.Consequently,biochemical sensors based on the amplification of liquid crystals have become one of the most promising sensors.This paper describes in detail the optical sensing principle of liquid crystals,sensing devices,and optical detection technologies.Meanwhile,the latest research findings are elucidated.Finally,the challenges and future research directions are discussed.

关键词： Optical sensor biochemistry liquid crystal label-free

Elucidation of potential relationship between endogenous proteases and key flavor substances in dry-cured pork coppa

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Food Science and Human Wellness 2024年第4期13卷 2152-2160页

作者： Mingming Li Qiujin Zhu Chao Qu Xiaohui Gong yunhan Zhang Xin Zhang Shouwei Wang China Meat Research Center Beijing 100068China Guizhou Provincial Key Laboratory of Agricultural and Animal Products Storage and Processing School of Liquor&Food EngineeringGuizhou UniversityGuiyang 550025China Beijing Academy of Food Sciences Beijing 100068China

Dry-cured meat products are considerably popular around the world due to unique flavor.Proteolysis is one of the enzymatic reactions from which flavor substances are derived,which is affected by endogenous proteases.The purpose aimed to reveal the potential relationship between endogenous proteases and key flavor substances in dry-cured pork coppa in this paper.The dynamic changes of endogenous proteases activity,free amino acids,and volatiles during dry-cured pork coppa processing were characterized.The results showed that 5 kinds of free amino acids,Glu,Lys,Val,Ala,and Leu,were identified as significant contributors to taste.Meanwhile,key volatiles,such as hexanal,nonanal,octanal,benzaldehyde,3-methyl butanoic acid,2-methyl propanoic acid,and ethyl octanoate,greatly contributed to the flavor characteristics of dry-cured pork coppa.Further partial correlation analysis was performed to better elucidate the relationship among parameters.The results revealed that close relationship between endogenous proteases and key substances.RAP not only significantly affected the accumulation of key active-amino acids,but also affected the accumulation of ethyl octanoate,2,3-pentanedione,and 2,3-octanedione by regulating the accumulation of octanoic acid and Leu.In addition,cathepsin B and D,DPP II,DPP IV and RAP notably affected accumulation of hexanal.

关键词： Dry-cured pork coppa Endogenous proteases Proteolysis Key taste-active amino acids Volatile compounds

Edaravone-loaded poly(amino acid) nanogel inhibits ferroptosis for neuroprotection in cerebral ischemia injury

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Asian Journal of Pharmaceutical Sciences 2024年第2期19卷 89-101页

作者： yunhan Zhang Zhulin Zou Shuang Liu Fangfang Chen Minglu Li Haoyang Zou Haiyan Liu Jianxun Ding Key Laboratory of Pathobiology Ministry of Education Department of AnatomyCollege of Basic Medical SciencesJilin UniversityChangchun 130061China Key Laboratory of Polymer Ecomaterials Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China Department of Gastrointestinal Colorectaland Anal SurgeryChina-Japan Union Hospital of Jilin UniversityChangchun 130033China

Neurological injury caused by ischemic stroke is a major cause of permanent disability and death. The currently available neuroprotective drugs fail to achieve desired therapeutic efficacy mainly due to short circulation half-life and poor blood−brain barrier (BBB) permeability. For that, an edaravone-loaded pH/glutathione (pH/GSH) dual-responsive poly(amino acid) nanogel (NG/EDA) was developed to improve the neuroprotection of EDA. The nanogel was triggered by acidic and EDA-induced high-level GSH microenvironments, which enabled the selective and sustained release of EDA at the site of ischemic injury. NG/EDA exhibited a uniform sub-spherical morphology with a mean hydrodynamic diameter of 112.3 ± 8.2 nm. NG/EDA efficiently accumulated at the cerebral ischemic injury site of permanent middle cerebral artery occlusion (pMCAO) mice, showing an efficient BBB crossing feature. Notably, NG/EDA with 50 µM EDA significantly increased neuron survival (29.3%) following oxygen and glucose deprivation by inhibiting ferroptosis. In addition, administering NG/EDA for 7 d significantly reduced infarct volume to 22.2% ± 7.2% and decreased neurobehavioral scores from 9.0 ± 0.6 to 2.0 ± 0.8. Such a pH/GSH dual-responsive nanoplatform might provide a unique and promising modality for neuroprotection in ischemic stroke and other central nervous system diseases.

关键词： Poly(amino acid)nanogel Controlled drug delivery Inhibition of ferroptosis Neuroprotection Cerebral ischenia injury therapy

Topology modulation of tetraphenylethylene graphdiyne at a liquid-liquid interface

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Nano Research 2024年第6期17卷 4661-4667页

作者： Tingting Xu Pei Wen Ng Shaofei Wu Danjun Fu yunhan Ma Yao Liu Lidao Li Xiaofei Zhang Jun Zhu Department of Chemistry National University of SingaporeSingapore 117543Singapore Institute of Materials Research and Engineering(IMRE) Agency for ScienceTechnology and Research(A*STAR)Singapore 138634Singapore

Monomers with low symmetries can form different topological structures in the preparation of organic two-dimensional(2D)materials.However,it remains challenging to modulate the topologies in practical synthesis.Leveraging theoretical insights into the formation energy of potential structural configurations,we report the topology modulation of a graphdiyne(GDY)derivative constructed from two-fold symmetric tetrakis(4-ethynylphenyl)ethene precursor by changing solvent combinations in a liquid-liquid interfacial system.An aqueous-organic(water-dichloromethane)interface afforded GDY with a kagome topology while a rhombic topology was formed at an organic-organic(hexane-acetonitrile)interface.A comprehensive evaluation of their structures and optoelectronic properties was conducted through various characterization techniques and theoretical computations.Our study provided new insights to modulate the topology of not only GDY but also other framework structures and obtain topologically pure materials in situations where different topologies are possible during practical synthesis.

关键词： graphdiyne derivative tetraphenylethylene topology modulation aggregation-induced emission(AIE)two-dimensional(2D)polymers interfacial synthesis

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加快培育壮大消费新动力

宏观经济管理 2024年第5期 35-44,52页

作者：邹蕴涵国家信息中心经济预测部宏观经济研究室

2023年中央经济工作会议指出,2024年要围绕推动高质量发展,着力扩大国内需求。其中,要激发有潜能的消费,推动消费从疫后恢复转向持续扩大,培育壮大新型消费,稳定和扩大传统消费。从当前情况看,传统消费加速更新,新型消费加速涌现,正在... 详细信息

2023年中央经济工作会议指出,2024年要围绕推动高质量发展,着力扩大国内需求。其中,要激发有潜能的消费,推动消费从疫后恢复转向持续扩大,培育壮大新型消费,稳定和扩大传统消费。从当前情况看,传统消费加速更新,新型消费加速涌现,正在形成多重增长新动力。同时,消费能力增长面临新压力、青年消费能力有待增强、供给端短板较为突出、消费基础设施水平有待提高、政策环境待优化调整等难题正在制约新动力的发展壮大,应引起高度重视。

关键词：消费新动力消费能力供给短板消费基础设施

芫花素与水溶性磷酸盐柱[6]芳烃包合物的制备、表征及分子模拟研究

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中草药 2024年第1期55卷 57-67页

作者：陶欣杨云汉杨明坤张郡童陈艳杨举杨玉香钏永明杨丽娟云南民族大学化学与环境学院云南省高校智能超分子化学重点实验室生物基材料绿色制备技术国家地方联合工程中心云南昆明650500

目的以水溶性磷酸盐柱[6]芳烃(phosphate salt pillar[6]arene,PP6A)作为芫花素的药物载体即主体分子,天然药芫花素为客体分子,构筑了一种新型的芫花素/PP6A(genkwanin/PP6A,GK/PP6A)超分子主客体包合物,对其进行表征和性能分析,进一步... 详细信息

目的以水溶性磷酸盐柱[6]芳烃(phosphate salt pillar[6]arene,PP6A)作为芫花素的药物载体即主体分子,天然药芫花素为客体分子,构筑了一种新型的芫花素/PP6A(genkwanin/PP6A,GK/PP6A)超分子主客体包合物,对其进行表征和性能分析,进一步对包合机制进行研究。方法采用饱和水溶液法制备芫花素与PP6A的超分子包合物;以包合物的包合率为指标,选用物质的量比、包合温度、包合时间和甲醇与水的体积比4个因素,每个因素3个水平,以L9(34)设计正交试验,对GK/PP6A包合物的制备工艺进行优化筛选。采用紫外可见吸收光谱法、傅里叶变换红外光谱、X射线粉末衍射、扫描电子显微镜和差示扫描量热等分析方法对芫花素和PP6A包合前后的理化性质进行研究分析;通过半经验分子轨道法、分子对接和核磁共振波谱法揭示了芫花素与PP6A最稳定的包合模式。结果GK/PP6A包合物的最优制备工艺为PP6A与芫花素的物质的量比为1∶1,包合温度为50℃,包合时间8 h,甲醇与超纯水体积比为1∶8,GK/PP6A包合物的包合率为89.93%;芫花素和PP6A以物质的量比1∶1形成超分子包合物,其络合常数为49488 L/mol;半经验分子轨道法与分子对接揭示的包合机制与二维核磁共振氢谱推断的主客体可能的包合模式相互吻合;芫花素包合前后的水溶解性和稳定性显著提高,其中水溶解性由3.5μg/mL提升至540.5μg/mL,约提高了155倍。结论PP6A是芫花素的良好宿主,芫花素与PP6A形成包合物后,芫花素的水溶性和稳定性得到显著提高,疏水作用和氢键作用为包合物形成的主要驱动力。

关键词：芫花素水溶性磷酸盐柱芳烃包合物分子对接溶解度

空气—双氧水联合氧化工艺选择性浸出废磷酸铁锂材料中的锂

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化工环保 2024年第2期44卷 235-241页

作者：刘慧勇杨茜傅云晗母家林旷戈福州大学石油化工学院福建福州350108

采用空气—双氧水联合氧化工艺选择性浸出废磷酸铁锂材料(废磷酸铁锂电池正极材料粉末)中的锂,经沉锂后以碳酸锂的形式回收。实验结果表明,在液固比为4 mL/g、H_(2)SO_(4)与Li的摩尔比为0.5、搅拌转速为250 r/min、反应温度为50℃的条... 详细信息

采用空气—双氧水联合氧化工艺选择性浸出废磷酸铁锂材料(废磷酸铁锂电池正极材料粉末)中的锂,经沉锂后以碳酸锂的形式回收。实验结果表明,在液固比为4 mL/g、H_(2)SO_(4)与Li的摩尔比为0.5、搅拌转速为250 r/min、反应温度为50℃的条件下空气曝气300 min,再于相同反应温度和搅拌转速下滴加H_(2)O_(2)(H_(2)O_(2)与Li的摩尔比为0.29)反应120 min,锂、铁和磷的浸出率分别为93.47%、17.26%和19.83%。该工艺较单独双氧水氧化工艺可减少75%以上的双氧水用量,大幅降低了回收成本。溶解氧浓度对浸出体系中Fe^(3+)的存在方式有重要影响:在较高浓度(通空气)下以磷酸铁为主;在较低浓度(未通空气但接触空气)下以氢氧化铁为主。

关键词：废磷酸铁锂电池空气氧化选择性浸出碳酸锂