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Circularly polarized phosphorescence and photon transport of micro/nanocrystals of ruthenium and iridium complexes with chiral anions

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中国科学:化学英文版 2023年第10期66卷 2892-2902页

作者： zhong-qiu li zhong-liang Gong Tongling liang Stefan Bernhard Yu-Wu zhong Jiannian Yao Beijing National Laboratory for Molecular Sciences(BNLMS) CAS Key Laboratory of PhotochemistryCAS Research/Education Center for Excellence in Molecular SciencesInstitute of ChemistryChinese Academy of SciencesBeijing 100190China School of Chemical Sciences University of Chinese Academy of SciencesBeijing 100049China Department of Chemistry Carnegie Mellon UniversityPittsburghPennsylvania 15213USA

Materials with efficient circularly polarized phosphorescences(CPPs) are of potential use in advanced data encryption and anticounterfeiting, bioimaging, optoelectronic devices and so forth. Herein, a simple method is presented for the preparations of CPP-active micro/nanocrystals with large luminescence dissymmetry factors(glum), high phosphorescence quantum efficiencies(Φ_(P)) and tunable emission colors. Diastereomeric Ir^(Ⅲ) and Ru^(Ⅱ) complexes with chiral(±)-camphorsulfonate counter-anions are readily synthesized and assembled into crystalline microrods, microplates or nanofibers with ordered morphologies. The chirality information of chiral counter-anions is efficiently transferred to the metal components to afford CPPs with cyan, green,yellow, or red emission colors and Φ_(P)in the range of 5%–85%. The number of chiral anions is found to play a role in influencing the CPP magnitudes of these crystals. The dicationic Ru^(Ⅱ) and tricationic Ir^(Ⅲ) complexes show glumvalues in the 10^(-2)order, which are much larger with respect to those of monocationic Ir^(Ⅲ) complexes. Single crystal X-ray analysis is performed to obtain information on the chirality transfer of these materials. In addition, circularly polarized photonic signal waveguiding is demonstrated using the microcrystals of an Ir^(Ⅲ)complex. This work demonstrates an appealing strategy of constructing chiral micro/nano-architectures for potential applications in chiral nanophotonics.

关键词： circularly polarized luminescence transition metal complexes chirality transfer micro/nanocrystals photon transport

A sensitive and validated LC-MS/MS method for high-throughput determination of pomalidomide in human plasma and pharmacokinetic studies

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Chinese Chemical Letters 2022年第2期33卷 916-919页

作者： Chang Shu Teng-Fei li Duo li zhong-qiu li Xing-Hua Xia State Key Laboratory of Analytical Chemistry for life Science School of Chemistry and Chemical EngineeringNanjing UniversityNanjing 210023China Department of Pharmaceutical Analysis School of PharmacyChina Pharmaceutical UniversityNanjing 210009China School of Pharmacy Department of Clinical PharmacologySir Run HospitalNanjing Medical UniversityNanjing 211166China

Pomalidomide is an immunomodulatory agent (IMiD) that has been approved by the US Food and Drug Administration (FDA) for clinical treatment of patients with multiple *** this work,we developed a sensitive and validated LC-MS/MS method for high-throughput determination of pomalidomide over the range of 1.006-100.6 ng/mL(R^(2)=0.9991) in human plasma and pharmacokinetic studies.A liquid-liquid extraction method using ethyl acetate was applied to extract pomalidomide and afatinib (as an internal standard,IS) from human *** separation was performed on a Hedera ODS column (150 mm×2.1 mm,5μm) with security guard C18 column (4 mm×2.0 mm) at 40℃.Methanol and 10 mmol/L aqueous solution of ammonium acetate containing 0.1%formic acid were used as a gradient elution mobile phase,and the flow rate was 0.4 mL/min.A triple quadruple tandem mass spectrometer using multiplex reaction monitoring mode (MRM) with electrospray ionization (ESI) positive ionization was *** precursor to product ion transitions for the quantitative analysis of pomalidomide and the IS were m/z 274.2→163.1 and m/z 486.1→371.1,*** established method has been validated according to regulatory guideline,and the results were all within the acceptance *** validated LC-MS/MS method was successfully applied to analyze samples obtained from clinical pharmacokinetics study after oral administration of pomalidomide (4 mg) capsules in human.

关键词： Pomalidomide liquid-liquid extraction LC–MS/MS method Pharmacokinetic Human plasma

新疆焉耆盆地主要作物需水量特征及影响因素分析

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土壤通报 2024年第1期55卷 57-67页

作者：张旭辉玉素甫江·如素力仇忠丽亚夏尔·艾斯克尔阿卜杜热合曼·吾斯曼新疆师范大学地理科学与旅游学院流域信息集成与生态安全实验室新疆乌鲁木齐830054 新疆干旱区湖泊环境与资源重点实验室新疆乌鲁木齐830054

【目的】探究新疆焉耆盆地主要作物需水量特征及影响因素,为干旱区农业水资源利用和作物种植结构优化提供参考。【方法】基于2000~2020年焉耆盆地3个气象站点的逐日气象观测资料,采用Penman-Monteith公式和作物系数法,计算焉耆盆地主要... 详细信息

【目的】探究新疆焉耆盆地主要作物需水量特征及影响因素,为干旱区农业水资源利用和作物种植结构优化提供参考。【方法】基于2000~2020年焉耆盆地3个气象站点的逐日气象观测资料,采用Penman-Monteith公式和作物系数法,计算焉耆盆地主要作物生育期内需水量、有效降水量和灌溉需水量,并用Mann-Kendall检验、线性分析法和通径分析法对以上数据的分布特征、变化趋势及影响因素进行定量研究。【结果】①近21年参考作物蒸散量呈逐年增加趋势,变化率为6.90 mm a^(−1),分布范围为960.20~1264.50 mm,年均值为1154.70 mm。②全生育期主要作物需水量为374.94~713.37 mm,不同生育阶段作物需水量、有效降水量和灌溉需水量的峰值均出现在生育中期,分别为247.32~497.92 mm、7.14~21.94 mm和240.18~475.99 mm,高于生育初期、快速发育期和成熟期。③主要作物需水量和灌溉需水量呈增加趋势,平均变化率分别为3.86 mm a^(−1)和4.09 mm a^(−1);有效降水量呈减少趋势,平均变化率为−0.23 mm a^(−1)。④影响主要作物需水量的主要因素有平均风速、平均气温、最高气温和日照时间,影响主要作物灌溉需水量的主要因素有平均风速、日照时间、最高气温和降水量。【结论】主要作物各生育阶段的有效降水量分配不均衡,在生育中期有效降水量达到峰值情况下,仍需通过农业灌溉来满足作物生长对水分的需求。制定完善的灌溉制度,才能提高农业水资源利用效率,保障干旱区粮食产量和农业可持续发展。

关键词：作物需水量有效降水量灌溉需水量影响因素焉耆盆地

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Influence of Recycled Concrete Fine Powder on Durability of Cement Mortar

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Fluid Dynamics & Materials Processing 2024年第1期20卷 45-58页

作者： Yadong Bian Xuan qiu Jihui Zhao zhong li Jiana Ouyang School of Architectural and Civil Engineering Zhongyuan University of TechnologyZhengzhou450007China School of Civil Engineering Sun Yat-Sen University&Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai)Zhuhai519082China

In this paper,the durability of cement mortar prepared with a recycled-concrete fine powder(RFP)was examined;including the analysis of a variety of aspects,such as the carbonization,sulfate attack and chloride ion erosion *** results indicate that the influence of RFP on these three aspects is *** carbonization depth after 30 days and the chloride diffusion coefficient of mortar containing 10%RFP decreased by 13.3%and 28.19%.With a further increase in the RFP content,interconnected pores formed between the RFP particles,leading to an acceleration of the penetration rate of CO_(2)and Cl^(−).When the RFP content was less than 50%,the corrosion resistance coefficient of the compressive strength of the mortar was 0.84-1.05 after 90 days of sulfate *** the expansion and cracking of the mortar was effectively alleviated due to decrease of the gypsum *** electron microscope(SEM)analysis has confirmed that 10%RFP contributes to the formation of a dense microstructure in the cement mortar.

关键词： Recycled concrete fine powder cement mortar carbonization sulfate chloride ion durability

Research on the mechanism of the two-dimensional ultrasonic surface burnishing process to enhance the wear resistance for aluminum alloy

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Friction 2024年第3期12卷 490-509页

作者： Zhen-Yu ZHOU qiu-Yang ZHENG Yu li Cong DING Guang-Jian PENG zhong-Yu PIAO College of Mechanical Engineering Zhejiang University of TechnologyHangzhou 310023China Key Laboratory of Special Purpose Equipment and Advanced Processing Technology Ministry of Education and Zhejiang ProvinceZhejiang University of TechnologyHangzhou 310014China

The gradient nanostructure is machined on the aluminum(Al)alloy by the two-dimensional ultrasonic surface burnishing process(2D-USBP).The mechanism of why the gradient nanostructure enhances wear resistance is *** mechanical properties and microstructure characterization for the gradient nanostructure are performed by operating a nanoindenter,transmission electron microscopy(TEM),and electron backscattered diffraction(EBSD).Dry wear tests are performed on the samples before and after machining to evaluate the wear resistance and *** effect of the gradient nanostructure on the wear resistance is explored by developing the crystal plasticity(CP)finite element and molecular dynamics(MD)*** characterization results show that the 2D-USBP sample prepared a gradient structure of~600μm thick on the aluminum surface,increasing the surface hardness from 1.13 to 1.71 GPa and reducing the elastic modulus from 78.84 to 70.14 *** optimization of the surface microstructure and the increase of the mechanical properties effectively enhance the wear resistance of the sample,with 41.20%,39.07%,and 54.58% of the wear scar areas for the 2D-USBP treated samples to the original samples under 5,10,and 15 N loads,*** gradient nanostructure hinders the slip of dislocations inside the sample during the wear process and reduces the size and scope of plastic deformation;meanwhile,the resistance to deformation,adhesion,and crack initiation and propagation of the sample surface is improved,resulting in enhanced wear resistance.

关键词： structural superlubricity lattice registry elastic deformation strained solitons crystal plasticity molecular dynamics simulations

In vivo label-free measurement of blood flow velocity symmetry based on dual line scanning third-harmonic generation microscopy excited at the 1700 nm window

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Journal of Innovative Optical Health Sciences 2024年第1期17卷 61-68页

作者： Hui Cheng Jincheng zhong Ping qiu Ke Wang Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province College of Physics and Optoelectronic Engineering Shenzhen University Shenzhen 518060 P.R.China

Measurement of bloodflow velocity is key to understanding physiology and pathology in *** most measurements are performed at the middle of the blood vessel,little research has been done on characterizing the instantaneous bloodflow velocity *** is mainly due to the lack of measurement technology with high spatial and temporal ***,we tackle this problem with our recently developed dual-wavelength line-scan third-harmonic generation(THG)imaging *** acquisition of dual-wavelength THG line-scanning signals enables measurement of bloodflow velocities at two radially symmetric positions in both venules and arterioles in mouse brain in *** results clearly show that the instantaneous bloodflow velocity is not symmetric under general conditions.

关键词： 1700 nm-Window third-harmonic generation imaging blood flow velocity

Hot versus cold subduction initiation

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National Science Review 2024年第2期11卷 101-102页

作者： zhong-Hai li Key Laboratory of Computational Geodynamics College of Earth and Planetary SciencesUniversity of Chinese Academy of Sciences

In the framework of plate tectonics, subduction initiation(SI) indicates the birth of a plate convergent boundary, which is a key point of plate tectonics and Wilson's cycle; however, its dynamic process is not well c... 详细信息

关键词： DRIVEN CRUST

Wetting front migration model of ion-adsorption rare earth during the multi-hole unsaturated liquid injection

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Journal of Rock Mechanics and Geotechnical Engineering 2024年第2期16卷 483-496页

作者： Yu Wang Xiaojun Wang Yuchen qiu Hao Wang Gang li Kaijian Hu Wen zhong zhongqun Guo Bing li Chunlei Zhang Guangxiang Ye Jiangxi Key Laboratory of Mining Engineering Jiangxi University of Science and TechnologyGanzhou341000China School of Resources and Environment Engineering Jiangxi University of Science and TechnologyGanzhou341000China School of Civil Engineering and Surveying&Mapping Engineering Jiangxi University of Science and TechnologyGanzhou341000China Ganzhou Nonferrous Metallurgy Research Institute Ganzhou341000China

In the process of ion-adsorption rare earth ore leaching,the migration characteristics of the wetting front in multi-hole injection holes and the influence of wetting front intersection effect on the migration distance of wetting fronts are still ***,wetting front migration distance and leaching time are usually required to optimize the leaching *** this study,wetting front migration tests of ionadsorption rare earth ores during the multi-hole fluid injection(the spacing between injection holes was 10 cm,12 cm and 14 cm)and single-hole fluid injection were completed under the constant water head *** the pre-intersection stage,the wetting front migration laws of ion-adsorption rare earth ores during the multi-hole fluid injection and single-hole fluid injection were *** the postintersection stage,the intersection accelerated the wetting front *** using the Darcy’s law,the intersection effect of wetting fronts during the multi-hole liquid injection was transformed into the water head height directly above the ***,based on the Green-Ampt model,a wetting front migration model of ion-adsorption rare earth ores during the multi-hole unsaturated liquid injection was *** analysis results showed that the proposed model can accurately simulate the infiltration process under experimental *** research results enrich the infiltration law and theory of ion-adsorption rare earth ores during the multi-hole liquid injection,and this study provides a scientific basis for optimizing the liquid injection well pattern parameters of ion-adsorption rare earth in situ leaching in the future.

关键词： Ion-adsorption rare earth ore Multi-hole unsaturated liquid injection In situ leaching Intersection effect Calculation model

The First Five Years of a Phase Theory for Complex Systems and Networks

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IEEE/CAA Journal of Automatica Sinica 2024年第8期11卷 1728-1743页

作者： Dan Wang Wei Chen li qiu IEEE the Division of Decision and Control Systems KTH Royal Institute of Technology the Department of Mechanics and Engineering Science & the State Key Laboratory for Turbulence and Complex Systems Peking University the Hong Kong University of Science and Technology the Southern University of Science and Technology

In this paper, we review the development of a phase theory for systems and networks in its first five years, represented by a trilogy: Matrix phases and their properties; The MIMO LTI system phase response, its physical interpretations,the small phase theorem, and the sectored real lemma; The synchronization of a multi-agent network using phase *** the end, we also summarize a list of ongoing research on the phase theory and speculate what will happen in the next five years.

关键词： linear systems Reviews Synchronization Complex systems