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Trifluoromethyl enable high-performance single-emitter white organic light-emitting devices based on quinazoline acceptor

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chinese Chemical Letters 2024年第4期35卷 442-446页

作者： Xiangan Song Shaogang Shen Mengyao Lu Ying Wang Yong Zhang School of Materials Science and Engineering Harbin Institute of TechnologyHarbin 150001China Key Laboratory of Photochemical Conversion and Optoelectronic Materials and TIPC-CityU Joint Laboratory of Functional Materials and DeviceChinese Academy of SciencesTechnical Institute of Physics and ChemistryBeijing 100190China University of chinese academy of sciences Beijing 100049China

Single-emitter white organic light-emitting diode(WOLED) based on small organic molecule exhibits great potential in simplifying fabrication process of WOLEDs. However, the design and synthesis of molecule for highly efficient single-emitter WOLED still remains a challenge. Herein, two asymmetric donor-acceptor-acceptor'(D-A-A') type molecule(PTZ-PQ-F and PTZ-PQ-CF3) are developed by employing trifluoromethyl(CF_(3)) or fluorine atom as secondary acceptor, which can exhibit white lighting with dual emission bands consisting of blue traditional fluorescence from quasi-axial(ax) conformer and orange thermally activated delayed fluorescence(TADF) from quasi-equatorial(eq) conformer. The introduction of CF_(3) into PTZ-PQ-CF3 greatly enhanced the photoluminescence quantum yield(PLQY) by suppressing the nonradiative deactivation. Owing to electron-inductive-effect of CF3, the “eq” conformer of PTZ-PQCF3 exhibits a much smaller ΔESTof 0.01 e V to realize more efficient reverse intersystem crossing(RISC)process, and then enhance the exciton utilization(nearly 100%) of the whole dual emission system. Consequently, single-emitter WOLEDs based on PTZ-PQ-CF3 show nearly standard white emission with EQE of 13.0% and CIE of(0.35, 0.36) in m CP host and show warm white emission with high EQE of 25.5%and CIE of(0.40, 0.47) in 35 Dcz PPy host, which are the best performance among reported single-emitter WOLEDs.

关键词： Single-emitter white organic light-emitting diode Conformational isomerism Thermally activated delayed fluorescence Trifluoromethyl Exciton utilization

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Colorimetric Detection of Acid Phosphatase and Malathion Using NiCo_(2)O_(4)Nanosheets as Peroxidase-Mimicking Activity

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Journal of Analysis and Testing 2024年第2期8卷 170-179页

作者： Jia Chen Zerong Long Yan Li Hongdeng Qiu xinjiang Uygur Autonomous Product Quality Supervision and Inspection institute Urumqi830000China CAS Key Laboratory of chemistry of Northwestern Plant Resources and Key Laboratory for Natural Medicine of Gansu Province Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou730000China

The establishment of a low-cost and facile approach for the assay of acid phosphatase(ACP)and its inhibitor is a research *** this paper,we successfully synthesized NiCo_(2)O_(4)nanosheets with peroxidase-mimicking activity in alkaline deep eutectic solvents(DESs)composed of NaOH and PEG-200,which can catalyze 3,3',5,5'-tetramethylbenzidine(TMB)to the oxidation state TMB(ox-TMB)in the presence of *** to L-ascorbic acid-2-phosphate can be hydrolyzed into ascorbic acid by ACP,the peroxidase-like activity of NiCo_(2)O_(4)nanosheets is ***,the addition of malathion,an inhibitor of ACP,can inhibit the activity of ACP and thus limit the production of ascorbic acid(AA).Therefore,a colorimetric approach can be established for highly sensitive and selective detection of ACP and malathion with detection limits of 0.032 U/L and 0.65 nmol/L,*** importantly,this method can be successfully applied to malathion detection in environmental samples tap water and food cucumber juice,indicating that it has potential application prospects in environmental and agricultural fields.

关键词： NiCo_(2)O_(4)nanosheets Acid phosphatase Malathion Peroxidase-mimicking activity Colorimetric

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The Nano Research Young Innovators Awards in bio-inspired nanomaterials

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Nano Research 2024年第2期17卷 417-425页

作者： Jun Chen Shuotao Wang Department of Bioengineering University of CaliforniaLos AngelesLos AngelesCA 90095USA Key Laboratory of Bio-inspired Materials and Interfacial Science Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190China

Nano Research Young Innovators(NR45)Awards are designed to acknowledge and celebrate the achievements of young researchers under 45 years of *** individuals have made significant contributions to the field of nanoscience and *** the inaugural NR45 Awards in 2018,the journal's editorial board has recognized over a hundred innovators specializing in nanobiotechnology,nano energy,two-dimensional materials,and *** focus of the 2023 NR45 Awards is on bioinspired nanomaterials,acknowledging thirty-three outstanding young innovators for their extraordinary contributions in developing these materials with applications spanning clean energy,human healthcare,monitoring,and disease treatments,as shown in *** extend our heartfelt congratulations to all the 33 NR45 Awardees in 2023!

关键词： journal materials contributions

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Using harmonic beam combining to generate pulse-burst in nonlinear optical laser

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chinese physics B 2024年第1期33卷 422-427页

作者：许元斋李珍玲张奥楠刘可张晶晶王小军彭钦军许祖彦 technical institute of physics and chemistry Chinese Academy of SciencesBeijing 100190China University of chinese academy of sciences Beijing 100049China

The ultrashort lasers working in pulse-burst mode reveal great machining performance in recent years. The number of pulses in bursts effects greatly on the removal rate and roughness. To generate a more equal amplitude of pulses in burst with linear polarization output and time gap adjustable, we propose a new method by the harmonic beam combining(HBC).The beam combining is commonly used in adding pulses into the output beam while maintaining the pulse waveform and beam quality. In the HBC, dichroic mirrors are used to combine laser pulses of fundamental wave(FW) into harmonic wave(HW), and nonlinear crystals are used to convert the FW into HW. Therefore, HBC can add arbitrarily more HW pulses to generate pulse-burst in linear polarization with simple structure. The amplitude of each pulse in bursts can be adjusted the same to increase the stability of the burst, the time gap of each pulse can be adjusted precisely by proper time delay. Because HBC adds pulses sequentially, the peak power density of the burst is the same as each pulse, pulses can be combined without concern of back-conversion which often occurs in high peak power density. In the demonstration, the extendibility of HBC was verified by combining two beams with a third beam. The combined efficiency rates were larger than 99%, and the beam quality of each beam was maintained at M^(2)≈1.4.

关键词： pulse-burst beam combining nonlinear optics

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Progress of Taiji-2 Project

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空间科学学报 2024年第4期44卷 674-676页

作者： LUO Ziren ZHANG Min WANG Jianyu WU Yueliang Taiji Laboratory for Gravitational Universe University of Chinese Academy of SciencesBeijing 100049 Hangzhou institute for Advanced Study University of Chinese Academy of SciencesHangzhou 310024 institute of Mechanics Chinese Academy of SciencesBeijing 100190 International Center for Theoretical physics Asia-Pacific University of Chinese Academy of SciencesBeijing 100190 Shanghai institute of technical physics Chinese Academy of SciencesShanghai 200083

Taiji-2 project is the second step of Taiji program,which is to verify the required technology for Taiji-3 *** feasibility study of Taiji-2 is successfully finished,and some of the main progress is introduced here.

关键词： Gravitational wave Taiji program Taiji-2 project

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Large low-field reversible magnetocaloric effect in K_(3)Gd(PO_(4))_(2) at sub-Kelvin temperature

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Journal of Rare Earths 2024年第6期42卷 1087-1092,I0003页

作者： Haojie Wang Zhaojun Mo Jianjian Gong Heng Tu Guochun Zhang Jun Shen School of Rare Earths University of Science and Technology of ChinaHefei230026China Ganjiang Innovation academy Chinese Academy of SciencesGanzhou341119China Center for Crystal Research and Development Key Laboratory of Functional Crystals and Laser TechnologyKey Laboratory of CryogenicsTechnical Institute of Physics and ChemistryChinese Academy of SciencesBeijing100190China Department of Energy and PowerEngineering School of Mechanical EngineeringBeijing Institute of TechnologyBeijing100081China

We synthesized a potassium gadolinium phosphate K3Gd(PO_(4))_(2)with monoclinic structure(P2_(1/m))by the high-temperature solid-state reaction *** lattice constants obtained by Rietveld refinements of XRD curve are a=0.7411 nm,b=0.5624 nm,and c=0.9433 *** and magnetocaloric properties of K_(3)Gd(PO_(4))_(2)were investigated in *** magnetic phase transition temperature of K3Gd(PO_(4))2 was determined by ultra-low temperature testing to be 0.58 K.K_(3)Gd(PO_(4))2 exhibits large magnetic entropy changes(-ΔSM).The maximum-ΔSM are 20.2 and 29.4 J/(kg·K)in the magnetic field variation(ΔH)of 1 and 2 T,respectively,which are larger than that of the commercial Gd_(3)Ga_(5)O_(12)(GGG).The maximum adiabatic temperature change(ΔT_(ad))reaches 5.91 K under a magnetic field change(ΔH)of 1 T.K_(3)Gd(PO_(4))_(2)is a potential magnetic refrigeration material for obtaining sub-Kelvin temperatures.

关键词： Ultra-low temperature Magnetocaloric effect Magnetic entropy change Magnetic refrigeration Rare earths

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Design and Cryogenic Performance of a Hexapod Platform for a Large Ground-based Wide Field Survey Telescope

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Research in Astronomy and Astrophysics 2024年第1期24卷 178-187页

作者： Yang Yu Xue-Wen Wang Yu Zhang Jia-Lin Sun Zhen-Bang Xu Jian-Li Wang Changchun institute of Optics Fine Mechanics and PhysicsChinese Academy of SciencesChangchun 130033China chinese academy of sciences Key Laboratory of On-orbit Manufacturing and Integration for Space Optics System Changchun 130033China University of chinese academy of sciences Beijing 100049China

The thermal gradient is an important factor that causes degradation to the image quality of telescopes. In order to ensure the accurate alignment of the primary focus unit and the primary mirror, the hexapod platform(as a corrector) is investigated in this paper. First, a ground-based telescope with 2.5 m aperture and 3.5 deg field of view is described. The telescope is under construction, and it is expected to be finished in 2023. Second, the hexapod platform with flexure hinges utilized to adjust the primary focus unit is proposed, which is applied as a ***, the inverse kinematics of the platform is established and an open-loop control system is built based on ***, the cryogenic performance test for the hexapod platform is performed. The experimental results show that the resolution and repeatability of the translation for the hexapod platform can be achieved at the micrometer *** resolution and repeatability of the rotation can be achieved at the arc-second level. Therefore, the cryogenic performance of the hexapod platform can meet the optical imaging requirements of the wide-field ground-based telescope. The kinematic analysis and cryogenic performance tests in the paper provide a technical reference for the precise alignment of the primary focus unit and the primary mirror, which can improve the imaging quality of the telescope.

关键词： methods:miscellaneous space vehicles:instruments telescopes miscellaneous

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BioKG-CMI: a multi-source feature fusion model based on biological knowledge graph for predicting circRNA-miRNA interactions

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Science China(Information sciences) 2024年第8期67卷 343-344页

作者： Mengmeng WEI Lei WANG Yang LI Zhengwei LI Bowei ZHAO Xiaorui SU Yu WEI Zhuhong YOU School of Computer Science and Technology China University of Mining and Technology School of Information Science and Engineering Zaozhuang University School of Computer Science and Information Engineering Hefei University of Technology xinjiang technical institute of physics & chemistry Chinese Academy of Sciences School of Information Engineering Xijing University School of Computer Science Northwestern Polytechnical University

Increasing experimental evidence has shown that circRNA has the potential to serve as a biomarker for disease diagnosis and prognosis, especially in cancer [1]. circ RNA actively participates in numerous pathological processes by serving as an miRNA sponge. Consequently, the precise prediction of circRNA-miRNA interactions(CMIs) is crucial for narrowing down the scope of biological experiments and expediting the research and development of disease treatments.

关键词： Knowledge graph

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Decoupling Algorithms for the Gravitational Wave Spacecraft

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Computer Modeling in Engineering & sciences 2024年第7期140卷 325-337页

作者： XueWang Weizhou Zhu Zhao Cui Xingguang Qian Jinke Yang Jianjun Jia Yikun Wang Key Laboratory of Space Active Opto-Electronics Technology Shanghai Institute of Technical PhysicsChinese Academy of SciencesShanghai200083China University of chinese academy of sciences Beijing100049China Key Laboratory of GravitationalWave Precision Measurement of Zhejiang Province Hangzhou Institute for Advanced StudyHangzhou310024China

The gravitational wave spacecraft is a complex multi-input multi-output dynamic *** gravitational wave detection mission requires the spacecraft to achieve single spacecraft with two laser links and high-precision *** one spacecraftwith two laser links,compared to one spacecraft with a single laser link,requires an upgraded decoupling algorithmfor the link *** decoupling algorithmwe designed reassigns the degrees of freedomand forces in the control loop to ensure sufficient degrees of freedomfor optical axis *** addressing the distinct dynamic characteristics of different degrees of freedom,a transfer function compensation method is used in the decoupling process to further minimize motion *** open-loop frequency response of the systemis obtained through *** upgraded decoupling algorithms effectively reduce the open-loop frequency response by 30 *** transfer function compensation method efficiently suppresses the coupling of low-frequency noise.

关键词： Gravitational waves spacecraft laser acquisition decoupling algorithms dynamical model optical axis control

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A Simple Synthesis of Tetraamino-[60]Fullerene Epoxides as Potential Antitumor Drug Candidates

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CCS chemistry 2024年第10期6卷 2392-2399页

作者： Yicheng Lu Jie Li Xiaolong Liu Dan He Libin Yang Wei Zhou Xie Wang Shanshan Chen Shiliang Chen Yating Liu Xin Wang Jiao Li Jiawei Huo Yang Liu Zehu Wang Meihan Liu Yijun Wang Yamin Li Fuwen Zhao Shumu Li Jinchao Wei Jianan Liu Wei Li Chunru Wang Key Laboratory of Molecular Nanostructure and Nanotechnology Institute of ChemistryChinese Academy of SciencesBeijing 100190 University of chinese academy of sciences Beijing 100190 The National Center for Nanoscience and Technology Beijing 100190 Central South University Changsha410082 Hunan Hangzhou institute of Medicine(HIM) Chinese Academy of SciencesHangzhou310092 Zhejiang Cancer Center Beijing Tongren HospitalCapital Medical UniversityBeijing 100069 technical institute of physics and chemistry Chinese Academy of SciencesBeijing 100190 Beijing FULLCAN Biotechnology Co. Beijing 100085

Amphiphilic aminated fullerenes have a broad margin of safety and significant antitumor ***,we develop a simple and versatile synthesis strategy for tetraamino-[60]fullerene epoxide(C_(60)(NR^(1)R^(2))_(4)O)using C_(60)Cl_(6)as a precursor,which notably reduces the reaction time to less than 1 h while retaining a high yield of over 80%with both cyclic and linear secondary amine substrates even at the gram *** molecular structure of C_(60)(NR^(1)R^(2))_(4)O is first validated by single-crystal diffraction,and a two-step reaction mechanism comprising nucleophilic substitution of Cl and the oxidative elimination of Cl_(2)is proposed based on experimental verification and density functional theory simulation.A set of water-soluble aminated C_(60)(NR^(1)R^(2))_(4)O was prepared in large quantities,and in vitro antitumor evaluation unveiled the critical role that terminal primary amino moieties of C_(60)(NR^(1)R^(2))_(4)O play in their antineoplastic *** work provides an effective synthesis method for aminated C_(60)(NR^(1)R^(2))_(4)O,facilitating the development of fullerene-derived tumor-targeted drugs.

关键词： tetraamino-fullerene epoxides simple synthesis C_(60)Cl_(6) water-soluble aminated fullerene antitumor

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