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Spin-modulated near-infrared-Ⅰ emission in a xanthene-decorated Fe(Ⅱ) spin-crossover complex

Science China Chemistry 2025年

作者： cheng Yi Duyong Chen Shihui zhang Rui Cai Chunying Duan Yinshan Meng Tao Liu State Key Laboratory of Fine Chemicals Frontier Science Center for Smart Materials and Chemical Engineering School of Chemical Engineering Dalian University of Technology Instrumental Analysis Center Dalian University of Technology School of Chemistry Dalian University of Technology Liaoning Binhai Laboratory

Molecular materials showing synergetic coupling of near-infrared （NIR） fluorescence and spin-crossover （SCO） are promisingly applicable in in-vivo bioimaging,temperature sensing,and spintronic *** the related study faces formidable *** this work we graft the NIR fluorophore xanthene onto the dipyridyl substituted triazole ligand and construct a new Febased SCO material,{FeⅡ（ddxc-abpt）2[N（CN）2]2}(1,ddxc-abpt:（E）-4-(((3,5-di（pyridin-2-yl）-4H-1,2,4-triazol-4-yl)imino)methyl)-N,N-diethyl-2,3-dihydro-1H-xanthen-6-amine).Magnetic studies indicate that compound 1 exhibits thermally induced SCO property in both the solid and solution ***-temperature fluorescence emission spectra reveal a remarkable 7-fold increase in photoluminescence intensity upon the transition from the low-spin state at 110 K to the high-spin state at 280 K,which is the record of all reported coupled fluorescence-SCO ***-temperature ultraviolet-visible （UV-Vis）absorption spectra show a significant change in absorption intensity within the fluorescence emission window,consistent with the F?rster resonance energy transfer （FRET） ***-dependent density functional theory （TD-DFT） calculations demonstrate that the strong coupling is attributed to disrupted energy transfer between the xanthene fluorophore and high-spin *** work provides a feasible approach for expanding the synergetic SCO-fluorescence materials to the NIR-Iwavelength region,and hopefully contributes to the applications of tunable NIR-SCO molecule-based sensors and devices.

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结球甘蓝品种生态型及开花特性的研究

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北京农业大学学报 1981年第3期 35-45页

作者：朱其杰陈琰张仪

结球甘蓝（Brassica oleracea *** L.）是个幼苗春化型（Green plant vernalizaion）作物。根据幼苗春化低温感应性的不同、可将我国现有甘蓝品种分成四个不同的生态类群。本文对目前甘蓝 F1代杂交制种中,存在的双亲种株花期不迂或抽苔... 详细信息

结球甘蓝（Brassica oleracea *** L.）是个幼苗春化型（Green plant vernalizaion）作物。根据幼苗春化低温感应性的不同、可将我国现有甘蓝品种分成四个不同的生态类群。本文对目前甘蓝 F1代杂交制种中,存在的双亲种株花期不迂或抽苔种株向营养生长逆转问题的原由,从品种生态上做了说明,并提出克服途径。

关键词：结球甘蓝品种生态型营养生长小花逆转现象包菜甘蓝类蔬菜抽苔种株分化期甘蓝品种苞叶开花特性

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1-脱氧野尻霉素对秀丽隐杆线虫的抗衰老作用

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食品工业科技 2018年第21期39卷 280-286页

作者：张孟丽束成杰张卫明南京师范大学生命科学学院江苏南京210023 南京野生植物综合利用研究院江苏南京211100

研究1-脱氧野尻霉素(DNJ)对秀丽隐杆线虫的抗氧化、抗衰老作用。考察10、100、1000 mg/L DNJ对秀丽隐杆线虫的寿命、运动能力、排泄周期、吞咽频率、热应激能力的影响,探索DNJ对秀丽隐杆线虫的抗氧化酶活力以及衰老相关基因的作用。结... 详细信息

研究1-脱氧野尻霉素(DNJ)对秀丽隐杆线虫的抗氧化、抗衰老作用。考察10、100、1000 mg/L DNJ对秀丽隐杆线虫的寿命、运动能力、排泄周期、吞咽频率、热应激能力的影响,探索DNJ对秀丽隐杆线虫的抗氧化酶活力以及衰老相关基因的作用。结果表明,10、100 mg/L DNJ能够显著(p 0.05)。因此,1-脱氧野尻霉素对秀丽隐杆线虫起到了抗衰老作用,但其作用机制与daf-2和daf-16基因无关。

关键词： 1-脱氧野尻霉素秀丽隐杆线虫抗衰老抗氧化

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Constructing 2D bismuth-based heterostructure for highly efficient photocatalytic CO2 reduction

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Tungsten 2025年第1期7卷 71-79页

作者： Ruo-Hang Xu Hao-Yu Jiang Dan-Dan Cui Kun-Rong Du Hong-Run zhang Sheng-jie Xu Ya-Qi Li Zhi-Zhen Ren Liang Wang Wei-Chang Hao Yi Du School of Physics and BUAA-UOW Joint Research Centre Beihang University Shenzhen Institute of Beihang University Centre for Catalysis and Clean Energy School of Environment and Science Griffith University

Reforming carbon dioxide（CO2） into fuels and valuable chemicals using solar energy holds significant potential for emission reduction and addressing energy supply *** recombination of photocarriers remains a major obstacle,however,to enhancing solar energy conversion efficiency in the photocatalytic reaction *** two-dimensional materials,constructing heterogeneous structures has emerged as an effective strategy to enhance the separation of photoexcited carriers by leveraging the internal electric field at the heterogeneous ***,we present a facile strategy for preparing Bi4NbO8Br/Bi2WO6plate-on-plate Z-scheme junctions with a strong internal electric field by in situ *** unique heterostructure facilitates efficient separation and transport of photoexcited charges by harnessing the internal electric field induced by chemical bonding at the lateral ***,the Bi4NbO8Br/Bi2WO6heterostructure exhibits enhanced CO2photoreduction properties,along with a CO yield rate of approximately 35 μmol·g-1·h-1under full light *** work offers novel insights into the synthesis of unique hetero structures intended to enhance the efficiency of photocatalytic CO2reduction.

关键词： Bi4NbO8Br/Bi2WO6 CO2 reduction Heterostructures Photocatalysts

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Physarum polycephalum-inspired adaptive optimization design of artificial microtubular networks

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Science China Chemistry 2025年

作者： Si-Min Zeng Di-Wei Zheng Ting Pan Xing-Lan Ding Yun zhang Chi-Hui Yang Si-Xue cheng Xian-Zheng zhang Key Laboratory of Biomedical Polymers of Ministry of Education&Department of Chemistry Wuhan University

Natural biological microtubular networks have undergone adaptive evolutionary selection and may offer viable solutions to design challenges in artificial microtubular networks. The plasmodium of the slime mold Physarum polycephalum(P. polycephalum) extends continuously to form a protoplasmic microtubular network structure, directly connecting food *** simulations revealed that the formation of this adaptive P. polycephalum microtubular network could be captured by a mathematical algorithm. Inspired by the P. polycephalum microtubular networks, we propose an adaptive optimization design method for artificial microtubular networks. Specifically, we utilized hydrogels with biodegradable and tissue-adhesive properties to replicate the P. polycephalum microtubular networks via photomask. In Rhodamine B diffusion and glucosecatalyzed reaction experiments, we found that the P. polycephalum microtubular networks exhibited significantly enhanced efficiency compared to vascular and artificial networks. Furthermore, we demonstrated the potential for uric acid(UA) degradation of the hydrogels with a real P. polycephalum microtubular network loaded with urate oxidase(UOx) in a rodent model of hyperuricemia. And this network achieved more than double the effect of the artificial network. This underscores the potential of natural microtubular networks to replace artificial microtubular networks.

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A fast streptomycin sulfate sensing based on Nb2CTX functionalized titled fiber Bragg grating

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Optoelectronics Letters 2025年

作者： BI Mingpan LIU jie zhang Yuchen LI Xiaolan MIAO Yinping Tianjin Key Laboratory of Film Electronic & Communicate Devices，School of Integrated Circuit Science and Engineering，Tianjin University of Technology Key Laboratory of Quantum Optics and Intelligent Photonics， School of Science， Tianjin University of Technology

We proposed a fast and temperature self-compensation method to detect streptomycin sulfate aqueous solution concentration based on a 2D Nb2CTXMXene nanosheets functionalized tilted Bragg grating（N-TFBG）. The introduction of 2D Nb2CTXMXene nanosheets brought more than 100% increase in sensitivity and exhibited a high sensitivity of 253.8 pm/mg/mL and detection limit 80 μg/mL in range of 0.2-0.8 mg/mL. Due to high sensitivity and compact structure， N-TFBG sensor has a faster measure time than previous method; additionally， the sensor has simultaneous temperature measurement by detecting the cladding mode and the core mode resonance peak simultaneously. Our research will hopefully open a new research platform for online detection of streptomycin sulfate concentration.

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A Grid Cell Based Distribution Network Planning Method Adapting to the Increasing Permeability of Distributed Resources

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Dianwang Jishu/Power System Technology 2025年第1期49卷 306-315页

作者： Zhou, Yang Wang, Zhuding zhang, Man Yang, jie Shu, Dongsheng State Key Laboratory of Power Transmission Equipment & System Security and New Technology Chongqing University Shapingba District Chongqing 400044 China Chongqing Electric Energy Star Inc Jiulongpo District Chongqing 400039 China Economic Research Institute of State Grid Hubei Electric Power Company Hubei Province Wuhan 430000 China

Based upon the existing research findings of distribution network planning，and based on the optimization division of power areas (or grid cells), a heuristic method of distribution network planning, i.e., the grid cell based distribution network planning method, is proposed to adapt to the gradual increase in the penetration rate of distributed resources, wherein the power balancing method involves differential approaches of different space-time-resources and two typical operating modes. The optimization division of grid cells is carried out by the principles of nearby use for distributed power resources and "nearby backup supply", resulting in the regional grid cell, substation grid cell, medium-voltage and low-voltage grid cell in terms of space, and also the energy output type, energy input type and balance type in terms of resources. The real planning example shows that the proposed method has relatively strong operability. © 2025 Power System Technology Press. All rights reserved.

关键词： Power distribution planning

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Global Probabilistic Voltage Sensitivity Analysis of Active Distribution Networks Based on the Compound Gaussian Mixture Model

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Dianwang Jishu/Power System Technology 2025年第1期49卷 295-305页

作者： zhang, Ren Wang, Jian Shang, jie Hai, Chen Liu, Haoming School of Electrical and Power Engineering Hohai University Jiangsu Province Nanjing 211100 China College of Artificial Intelligence and Automation Hohai University Jiangsu Province Nanjing 211100 China

The stochasticity of the high penetration of distributed generations (DGs) exacerbates the voltage fluctuation of the active distribution networks (ADNs) and complicates its voltage safety analysis. Therefore, this paper proposes a global probability voltage sensitivity analysis method based on the compound Gaussian mixture model (GMM). Firstly, a shared node path impedance-based global voltage sensitivity analytical model of ADN is derived to quantify the impact of global power fluctuations on node voltage. Considering that the voltage fluctuation has the non-Gaussian characteristic under the superposition influence of power uncertainty injected by multiple nodes, the GMM is used to characterize the probability characteristics of DG and load forecasting errors. Then, based on the affine transformation of the global sensitivity matrix to the GMM of DG and load forecasting error, the probability analytic expression of the voltage fluctuation is constructed, which is caused by the uncertainty of DG and load. Finally, based on the GMM characteristic function, the compound GMM characteristic function of the combined influence of the uncertainty of DG and load on voltage fluctuation is derived, and the global probabilistic voltage sensitivity analysis model based on the compound GMM is established. The case study results show that the proposed method can reflect the probability characteristics of the impact of all node power fluctuations on node voltage, and can quickly and accurately calculate the probability of over-voltage in ADNs. © 2025 Power System Technology Press. All rights reserved.

关键词： Affine transforms

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雾霾天交通视频监控系统图像实时清晰化处理

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科学技术与工程 2014年第35期22卷 254-257,269页

作者：嵇晓强程揭章郎小龙王美娇长春理工大学生命科学技术学院长春130022 中国科学院长春光学精密机械与物理研究所长春130030 长春理工大学光电信息学院长春130012

针对交通视频监控系统在雾霾天气下图像像质退化的问题,从天气对系统成像影响入手分析造成系统图像降质和模糊的机理。基于全局暗原色先验和图像对比度增强方法,提出了一种有效、快速的雾霾天气下降质图像清晰化处理方法。结合实际应用... 详细信息

针对交通视频监控系统在雾霾天气下图像像质退化的问题,从天气对系统成像影响入手分析造成系统图像降质和模糊的机理。基于全局暗原色先验和图像对比度增强方法,提出了一种有效、快速的雾霾天气下降质图像清晰化处理方法。结合实际应用,以现场可编程门阵列FPGA为核心处理单元,设计了一种高速图像采集、增强、去雾霾和传输系统平台,并基于该平台实际验证了文中提出的算法。最后,经过实际测试表明,该系统平台能实时、有效地提高交通视频监控系统图像的对比度和色彩清晰度,从而提高了其工作的可靠性、稳定性以及应对恶劣天气的能力。

关键词：雾霾清晰度对比度增强全局暗原色先验

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Achieving ultralow leakage current in Schottky-MIS cascode anode lateral field-effect diode based on AlGaN/GaN HEMT

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Science China(Information Sciences) 2025年第1期68卷 379-385页

作者： Fangzhou WANG Changhong GAO Guojian DING cheng YU Zhuocheng WANG Xiaohui WANG Qi FENG Ping YU Peng ZUO Wanjun CHEN Yang WANG Haiqiang JIA Hong CHEN Bo zhang Zeheng WANG Songshan Lake Materials Laboratory School of Microelectronics Southern University of Science and Technology State Key Laboratory of Electronic Thin Films and Integrated Devices University of Electronic Science and Technology of China Manufacturing Commonwealth Scientific and Industrial Research Organisation

In this paper,we design and fabricate a Schottky-metal-insulator-semiconductor（MIS） cascode anode GaN lateral field-effect diode（CA-LFED） to achieve ultralow reverse leakage current(ILEAK).The device based on AlGaN/GaN highelectron-mobility-transistor（HEMT） includes a normally-off MIS-controlled channel that is cascoded with a high barrier height Schottky *** reverse bias,the high electric-field is effectively prevented by the normally-off MIS-controlled channel *** with the high barrier height Schottky contact,this feature significantly suppresses the *** by the device fabrication,the CA-LFED with high breakdown voltage（BV）>600 V shows an ultralow ILEAKof 3.6×10-9A/mm as well as a low forward voltage drop（VF） of 2.2 *** performance suggests that the CA-LFED can be a promising candidate for ultralow ILEAKand better VF-ILEAKtrade-off GaN power diode applications.

关键词： Schottky-MIS cascode anode lateral field-effect diode (LFED) ultralow reverse leakage current ($I_{\rm{LEAK}}$) forward drop and reverse leakage trade-off AlGaN/GaN HEMTs

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