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Highly luminescent zero-dimensional lead-free manganese halides forβ-ray scintillation

Nano Research 2022年第9期15卷 8486-8492页

作者： Linyuan Lian Wei Qi Huaiyi Ding Hao Tian Qi Ye Yong-Biao Zhao Long zhao Jianbo Gao Daoli Zhang Jianbing Zhang School of Optical and Electronic Information Huazhong University of Science and Technology1037 Luoyu RoadWuhan 430074China Hubei Key Laboratory of Bioinorganic Chemistry&Materia Medica School of Chemistry and Chemical EngineeringHuazhong University of Science and TechnologyWuhan 430074China Key Laboratory of Yunnan Provincial Higher Education Institutions for Optoelectronics Device Engineering School of Physics and AstronomyYunnan UniversityKunming 650504China State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic EngineeringHuazhong University of Science and TechnologyWuhan 430074China Department of Physics and Astronomy Ultrafast Photophysics of Quantum Devices LaboratoryClemson UniversityClemsonSC 29634USA Wuhan National Laboratory for Optoelectronics Huazhong University of Science and TechnologyWuhan 430074China Shenzhen Huazhong University of Science and Technology Research Institute Shenzhen 518057China

Because of their moderate penetration power,β-rays(high-energy electrons)are a useful signal for evaluating the surface contamination of nuclear radiation.However,the development ofβ-ray scintillators,which convert the absorbed high-energy electrons into visible photons,is hindered by the limitations of materials selection.Herein,we report two highly luminescent zerodimensional(0D)organic-inorganic lead-free metal halide hybrids,(C_(13)H_(30)N)_(2)MnBr_(4)and(C_(19)H_(34)N)_(2)MnBr_(4),as scintillators exhibiting efficientβ-ray scintillation.These hybrid scintillators combine the superior properties of organic and inorganic components.For example,organic components that contain light elements C,H,and N enhance the capturing efficiency ofβparticles;isolated inorganic[MnBr_(4)]2−tetrahedrons serve as highly localized emitting centers to emit intense radioluminescence(RL)underβ-ray excitation.Both hybrids show a narrow-band green emission peaked at 518 nm with photoluminescence quantum efficiencies(PLQEs)of 81.3%for(C_(13)H_(30)N)_(2)MnBr_(4)and 86.4%for(C_(19)H_(34)N)_(2)MnBr_(4),respectively.To enable the solution processing of this promising metal halide hybrid,we successfully synthesized(C_(13)H_(30)N)_(2)MnBr_(4)colloidal nanocrystals for the first time.Being excited byβ-rays,(C_(13)H_(30)N)_(2)MnBr_(4)scintillators show a linear response toβ-ray dose rate over a broad range from 400 to 2,800 Gy·s^(−1),and also display robust radiation resistance that 80%of the initial RL intensity can be maintained after an ultrahigh accumulated radiation dose of 240 kGy.This work will open up a new route for the development ofβ-ray scintillators.

关键词： zero-dimensional metal halide hybrids radiation sterilization β-ray scintillation nanocrystals

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Biomimetic Asymmetric Reduction of Quinazolinones with Chiral and Regenerable NAD(P)H Models

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Chinese Journal of Chemistry 2020年第7期38卷 714-718页

作者： Zi-biao zhao Xiang Li Bo Wu yong-Gui Zhou State Key Laboratory of Catalysis Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalianLiaoning 116023China State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic ChemistryChinese Academy of SciencesShanghai 200032China

A facile approach to chiral dihydroquinazolinone derivatives has been described wia biomimetic asym-metric reduction of quinazolinones with chiral and regenerable NAD(P)H models.The utiity of this method was demonstra... 详细信息

关键词： chiral Chiral conclusion

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Micro-/nanostructured ZnFe_(2)O_(4) hollow sphere/GO composite for structurally enhanced photocatalysis performance

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Rare Metals 2023年第3期42卷 813-821页

作者： Yang-Yang zhao Xian-biao Wang Qian-Kun Xu Soufian Chakir yong-Fei Xu Bao Xu yong-Hua Hu Anhui Province International Research Center on Advanced Building Materials School of Materials Science and Chemical EngineeringAnhui Jianzhu UniversityHefei 230601China Institute of Solid State Physics Chinese Academy of SciencesHefei 230031China Anhui Institute of Building Science Research and Design Hefei 230031China Anhui Key Laboratory of Tobacco Chemistry Hefei 230088China

The pollution of organic dyes has become a serious environmental problem.It is still urgent to prepare a highly efficient and environment-friendly photocatalyst for pollutants removal.Herein,a micro-/nanostructured ZnFe_(2)O_(4)hollow sphere/GO(ZnFe_(2)O_(4)/GO)composite photocatalyst was prepared through a one-step hydrothermal method with high performance and recycling property.The obtained micro-/nanostructured composite was assembled by ZnFe_(2)O_(4) hollow spheres and GO nanosheets.

关键词： composite property performance

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Enantioselective Synthesis of Tetrahydroquinolines via One-Pot Cascade Biomimetic Reduction

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Chinese Journal of Chemistry 2020年第12期38卷 1691-1695页

作者： Zi-biao zhao Xiang Li Mu-Wang Chen Bo Wu yong-Gui Zhou State Key Laboratory of Catalysis Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalianLiaoning 116023China State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic ChemistryChinese Academy of SciencesShanghai 200032China

of main observation and conclusion A novel and efficient protocol for the synthesis of chiral tetrahydroquinoline derivatives with excellent enantioselectivities and high yields has been developed through one-pot cascade biomimetic reduction.The detailed reaction pathway includes the acid-catalyzed and ruthenium-catalyzed formation of aromatic quinoline intermediates and biomimetic asymmetric reduction.

关键词： reduction. catalyzed quinoline

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Coral-like cobalt selenide/carbon nanosheet arrays attached on carbon nanofibers for high-rate sodium-ion storage

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Rare Metals 2023年第3期42卷 916-928页

作者： Jin-Zhi Hu Wen-Jie Liu Ji-Hua Zheng Guo-Chun Li yong-Feng Bu Fen Qiao Jia-biao Lian Yan zhao Institute for Energy Research School of Energy and Power EngineeringJiangsu UniversityZhenjiang 212013China College of Chemistry and Chemical Engineering Inner Mongolia UniversityHohhot 010021China

Cobalt selenide(CoSe_(2))has become a promising anode material for sodium-ion batteries(SIBs)due to its stable chemical properties,environmental friendliness,and high theoretical capacity.However,the undesirable rate capacity and cycle stability of the anode materials largely limit its applications for SIBs due to the relatively low electronic conductivity and huge volume change during the Na+insertion/extraction.In this study,electrostatic spinning combined with a wet chemical method is employed to synthesize coral-like composite material(CNF@c-CoSe_(2)/C),which is composed of CoSe_(2)/carbon nanosheet arrays(CoSe_(2)/C)and carbon nanofibers(CNFs).CoSe_(2)/C nanoflakes derived from metal-organic frameworks(MOFs)with high surface area and the porous structure can inhibit the pulverization and amorphization of CoSe_(2) during charge and discharge processes,thus significantly keeping the stability of the microstructure.CNF can limit the overgrowth of nanosheets and serve as a conductive skeleton.Compared to two-dimensional CoSe_(2)/C nanoflakes and pure CoSe_(2) nanoparticles,the composite can expose more active sites and effectively accelerate the diffusion of Na+,which displays enhanced rate capability(266.5 mAh·g^(-1) at 5.0 A·g^(-1))and cycling stability(268.3 mAh·g^(-1) after 100 cycles at 1.0 A·g^(-1)).Moreover,the rational preparation strategy for metal selenide-based heterostructure material presents a new way for high-performance SIB s.

关键词： Carbon nanofiber(CNF) Cobalt selenide(CoSe_(2)) Electrostatic spinning Sodium-ion storage

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Diboron-mediated palladium-catalyzed asymmetric transfer hydrogenation using the proton of alcohols as hydrogen source

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Science China Chemistry 2021年第10期64卷 1743-1749页

作者： Bo Wu Jimin Yang Shu-Bo Hu Chang-Bin Yu Zi-biao zhao Yi Luo yong-Gui Zhou Dalian Institute of Chemical Physics Chinese Academy of SciencesDalian 116023China State Key Laboratory of Fine Chemicals School of Chemical EngineeringDalian University of TechnologyDalian 116024China State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic ChemistryChinese Academy of SciencesShanghai 200032China

The developments of hydrogen sources stand at the forefront of asymmetric reduction. In contrast to the well-studied alcohols as hydrogen sources via β-hydride elimination, the direct utilization of the proton of alcohols as a hydrogen source for activatormediated asymmetric reduction is rarely explored. Herein we report the proton of alcohols as a hydrogen source in diboronmediated palladium-catalyzed asymmetric transfer hydrogenation of 1,3-diketones and indoles, providing a series of chiral β-hydroxy ketones and indolines with excellent yields and enantioselectivities. This strategy would be useful for the synthesis of chiral deuterium-labelled compounds due to the ready availability of deuterium-labelled alcohols. Mechanistic investigations and DFT calculations revealed that active chiral Pd-H species was generated from the proton of alcohols by activating of tetrahydroxydiboron, hydrogen transfer was the rate-determining step, and the reaction preferred Pd(0)-catalyzed mechanism.

关键词： proton of alcohols hydrogen source asymmetric reduction

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Effects of competitive and noncompetitive 5α-reductase inhibitors on serum and intra-prostatic androgens in beagle dogs

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Chinese Medical Journal 2013年第4期126卷 711-715页

作者： zhao Xiao-feng YANG yong WANG Wei QIU Zhi ZHANG Peng WANG biao Department of Urology Beijing Chao-Yang Hospital Capital Medical University Beijing 100020 China

Background 5a-Reductase inhibitors （5a-RI） act by inhibiting the conversion of testosterone to dihydrotestosterone （DHT）, thereby preventing DHT induced benign prostatic hyperplasia. The existing 5a-RIs can be classified into two types： competitive and noncompetitive. Currently, limited evidence is available concerning the effect differences between the two types of 5a-RI on androgens. The purpose of this study was to assess the effects of competitive and noncompetitive 5a-RIs on serum and intra-prostatic androgens in beagle dogs. Methods Twenty beagles with spontaneous benign prostatic hyperplasia were randomly allocated into two groups： epristeride group （n=10） in which beagles were treated with epristeride at 1 mg/kg once a day for 3 months, and finasteride group （n=10） in which beagles were treated with finasteride at 1 mg/kg once a day for 3 months. The levels of intra-prostatic testosterone and DHT were measured before treatment and on day one after three months medication. Serum levels of testosterone and DHT were measured at the same time points. Changes in androgen levels before and after treatment were analyzed, and comparisons were made within each treatment group and between treatment groups. Results After 3-month treatment, serum and intra-prostatic DHT levels all decreased significantly in both the epristeride and finasteride groups. The change of DHT in serum was significantly higher in the finasteride group （-14% and -43% in epdsteride and finasteride groups respectively, with P〈0.001）; however there was no significant difference in the changes of intra-prostatic DHT between the two groups （-47% and -51% in epristeride and finasteride groups, respectively, P=0.304）. The decreases in DHT levels were accompanied by reciprocal increases in serum and intra-prostatic testosterone levels. Changes of testosterone were significantly higher in finasteride group both in serum （20% and 42% in epristeride and finasteride groups, respectively, P〈0.001） and in prostate tissue （18% and 29% in epristeride and fin

关键词： 5a-reductase inhibitor androgen benign prostatic hyperplasia

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Review of roll-to-roll fabrication techniques for colloidal quantum dot solar cells

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Journal of Electronic Science and Technology 2023年第1期21卷 1-25页

作者： Yin-Fen Ma You-Mei Wang Jia Wen Ao Li Xiao-Liang Li Mei Leng Yong-Biao Zhao Zheng-Hong Lu Key Laboratory of Yunnan Provincial Higher Education Institutions for Optoelectronics Device Engineering Department of PhysicsSchool of Physics and AstronomyYunnan UniversityKunming650091China International Joint Research Center for Optoelectronic and Engineering Research Yunnan UniversityKunming650091China Department of Materials Science and Engineering University of TorontoTorontoM5S 3E4Canada

Colloidal quantum dots(CQDs)are of great interest to photovoltaic(PV)technologies as they possess the benefits of solution-processability,size-tunability,and roll-to-roll manufacturability,as well as unique capabilities to harvest near-infrared(NIR)radiation.During the last decade,lab-scale CQD solar cells have achieved rapid improvement in the power conversion efficiency(PCE)from~1%to 18%,which will potentially exceed 20%in the next few years and approach the performance of other PV technologies,such as perovskite solar cells and organic solar cells.In the meanwhile,CQD solar cells exhibit long lifetimes either under shelf storage or continuous operation,making them highly attractive to industry.However,in order to meet the industrial requirements,mass production techniques are necessary to scale up the fabrication of those lab devices into large-area PV modules,such as roll-to-toll coating.This paper reviews the recent developments of large-area CQD solar cells with a focus on various fabrication methods and their principles.It covers the progress of typical large-area coating techniques,including spray coating,blade coating,dip coating,and slot-die coating.It also discusses next steps and new strategies to accomplish the ultimate goal of the low-cost large-area fabrication of CQD solar cells and emphasizes how artificial intelligence or machine learning could facilitate the developments of CQD solar cell research.

关键词： Colloidal quantum dots(CQDs) Large-area fabrication Roll-to-roll Solar cells

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Organic semiconductor heterojunctions: electrode-independent charge injectors for high-performance organic light-emitting diodes

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Light(Science & Applications) 2016年第1期5卷 570-576页

作者： yong-Hua Chen Dong-Ge Ma Heng-Da Sun Jiang-Shan Chen Qing-Xun Guo Qiang Wang Yong-Biao Zhao State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China Department of Macromolecular Science and Engineering School of EngineeringCase Western Reserve UniversityClevelandOH 44106USA School of Materials Science and Engineering Shaanxi Normal UniversityXi’an 710062China Luminous Center of Excellence for Semiconductor Lighting and DisplaysSchool of Electrical and Electronic EngineeringNanyang Technological UniversitySingapore 639798Singapore

Organic light-emitting diodes(OLEDs)are driven by injected charges from an anode and a cathode.The low and high work function metals are necessary for the effective injection of electrons and holes,respectively.Here,we introduce a fully novel design concept using organic semiconductor heterojunctions(OSHJs)as the charge injectors for achieving highly efficient OLEDs,regardless of the work functions of the electrodes.In contrast to traditional injected charges from the electrodes,the injected charges originate from the OSHJs.The device performance was shown to be significantly improved in efficiency and stability compared to conventional OLEDs.Attractively,the OLEDs based on OSHJs as charge injectors still exhibited an impressive performance when the low work function Al was replaced by air-and chemistry-stable high work function metals,such as Au,Ag,and Cu,as the cathode contact,which has been suggested to be difficult in conventional OLEDs.This concept challenges the conventional design approach for the injection of charges and allows for the realization of practical applications of OLEDs with respect to high efficiency,selectable electrodes,and a long lifetime.

关键词： charge injection OLEDs organic semiconductor heterojunctions

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Effect of Selective Dorsal Neurectomy on Erectile Function in Rats

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Current Medical Science 2023年第2期43卷 324-328页

作者： Jin WANG Sen LI Wen-jia LI Wen-li ZHU Yuan-bin XIA Yao HE You-peng ZHANG Han-qing ZENG yong-biao CHENG zhao-hui ZHU Department of Urology Union HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan430022China Department of Stomatology Union HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan430022China Department of Geriatrics Union HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan430022China

Objective This study aimed to investigate the effect of penile selective dorsal neurectomy(SDN)on erectile function in rats.Methods Twelve adult male Sprague-Dawley rats(15 weeks old)were divided into three groups(n=4 per group):in control group,rats received no treatment;in sham group,rats underwent a sham operation;in SDN group,rats underwent SDN with half of the dorsal penile nerve severed.The mating test was performed,and the intracavernous pressure(ICP)assessed six weeks after the surgical treatment.Results At postoperative six weeks,the mating test revealed no significant difference in mounting latency and mounting frequency among the three groups(P>0.05),while the ejaculation latency(EL)was significantly longer and ejaculation frequency(EF)lower in the SDN group than in the control and sham groups(P0.05).Conclusion SDN does not adversely affect the erectile function and sexual desire of rats,and at the same time it can reduce EL and EF,providing an application basis for SDN in the clinical treatment of premature ejaculation.

关键词： dorsal penile nerve selective dorsal neurectomy erectile dysfunction premature ejaculation

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