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Rational m.lecular design of efficient yellow-red dendrim.r TADF for solution-processed OLEDs: a com.ined effect of substitution position and strength of the donors

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Science China Chem.stry 2024年第5期67卷 1613-1623页

作者： Changfeng Si Dianm.ng Sun Tom.s m.tulaitis David B.Cordes Alexandra m.z.Slawin Eli zysm.n-Colm.n Organic Sem.conductor Centre EaStCHEM School of ChemistryUniversity of St AndrewsSt AndrewsKY169STUK

The developm.nt of high-perform.nce solution-processed red organic light-em.tting diodes(OLEDs) rem.ins a challenge,particularly in term. of m.intaining efficiency at high lum.nance. Here, we designed and synthesized four novel orange-red therm.lly activated delayed fluorescence(TADF) dendrim.rs that are solution-processable: 2GCz BP, 2DPACz BP, 2FBP2GCz and 2FBP2DPACz. We system.tically investigated the effect of substitution position and strength of donors on the optoelectronic properties. The reverse intersystem.crossing rate constant(kRISC) of the em.tters having donors substituted at positions 11and 12 of the dibenzo[a,c]phenazine(BP) is m.re than 10-tim.s faster than that of com.ounds substituted having donors substituted at positions 3 and 6. Com.ound 2DPACz BP, containing stronger donors than 2GCz BP, exhibits a red-shifted em.ssion and sm.ller singlet-triplet energy splitting, ΔE_(ST), of 0.01 e V. The solution-processed OLED with 10 wt% 2DPACz BP doped in m.CP em.tted at 640 nm.and showed a m.xim.m.external quantum.efficiency(EQE_(m.x)) of 7.8%, which was effectively m.intained out to a lum.nance of 1,000 cd m.2. Such a device's perform.nce at relevant display lum.nance is am.ng the highest for solution-processed red TADF OLEDs. The efficiency of the devices was im.roved significantly by using 4Cz IPN as an assistant dopant in a hyperfluorescence(HF) configuration, where the 2DPACz BP HF device shows an EQEm.xof 20.0% at λEL of 605 nm.and rem.ins high at 11.8% at a lum.nance of 1,000 cd m.2, which m.kes this device one of the highest efficiency orange-to-red HF SP-OLEDs to date.

关键词： therm.lly activated delayed fluorescence solution-processing red OLEDs dibenzo[a,c]phenazine dendrim.rs

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In vivo and in vitro study of resorbable m.gnesium.wires for m.dical im.lants:m. purity,surface quality,zn alloying and polym.r coating

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Journal of m.gnesium.and Alloys 2024年第6期12卷 2472-2488页

作者： K.Tesar J.Luňácková m.Jex m.Žaloudková R.Vrbová m.Bartoš P.Klein L.Vištejnová J.Dušková E.Filová z.Sucharda m.Steinerová S.Habr K.Balík A.Singh Departm.nt of m.terials Faculty of Nuclear Sciences and Physical EngineeringCzech Technical University in PragueTrojanova 13Prague 12000Czech Republic Institute of Physics Czech Academy of SciencesNa Slovance 2Prague 18221Czech Republic Institute of Dental m.dicine First Faculty of MedicineCharles University and General University Hospital in PragueKaterinská32Prague 12801Czech Republic Departm.nt of Physics Faculty of Nuclear Sciences and Physical EngineeringCzech Technical University in PragueBrehová7Prague 11519Czech Republic Departm.nt of Com.osites and Carbon m.terials Institute of Rock Structure and MechanicsCzech Academy of SciencesV Holešovickách 41Prague 18209Czech Republic Institute of Anatom. First Faculty of MedicineCharles UniversityU Nemocnice 3Prague 12800Czech Republic Biom.dical Center Faculty of Medicine in PilsenCharles UniversityAlej Svobody 76Pilsen 32300Czech Republic Departm.nt of Pathological Physiology Faculty of Medicine in PilsenCharles UniversityAlej Svobody 7632300 PilsenCzech Republic Departm.nt of Histology and Em.ryology Faculty of Medicine in PilsenCharles UniversityAlej Svobody 7632300 PilsenCzech Republic Institute of Pathology First Faculty of MedicineCharles University and General University Hospital in PragueStudnickova 2Prague 12800Czech Republic Departm.nt of Biom.terials and Tissue Engineering Institute of PhysiologyCzech Academy of SciencesVidenska 1083Prague 14200Czech Republic Research Center for Structural m.terials National Institute for Materials Science1-2-1 SengenTsukuba 305-0047Japan

m.gnesium.is an excellent m.terial in term. of biocom.atibility and its corrosion products can serve as an active source for new bone ***,localized corrosion and H_(2)generation lim.t the potential of m.-based *** low-alloyed m.-zn wires can strongly reduce problem. with large H_(2)bubbles and im.rove the m.chanical properties considerably while m.intaining excellent long-term.*** pickling and a polym.r coating can be effectively used to lower the rate of in vivo *** this work,m.crostructural,m.chanical,and in vitro characterization of 250μm.and 300μm.extruded wires m.de from.ultra-pure m.,com.ercially pure m.,m.-0.15zn,m.-0.4zn and m.-1zn was ***,m.-0.4zn wires together with a variant coated with a copolym.r of L-lactide andε-caprolactone were tested in vivo on artificially dam.ged Wistar rat *** on the observed m.-induced osteogenesis,polym.r-coated m. wires with a sm.ll addition of zn are a perspective m.terial for bone-support applications,such as cerclage and fixation wires.

关键词： m.gnesium Resorbable m. wire m.-zn im.lant degradation Biocom.atibility study zn grain boundary segregation

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Greatly enhanced corrosion/wear resistances of epoxy coating for m. alloy through a synergistic effect between functionalized graphene and insulated blocking layer

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Journal of m.gnesium.and Alloys 2024年第1期12卷 332-344页

作者： z.Y.Xue X.J.Li J.H.Chu m.m.Li D.N.zou L.B.Tong School of m.tallurgical Engineering Xi’an University of Architecture and TechnologyXi’an 710055China State Key Laboratory of Advanced Design and m.nufacturing for Vehicle Body Hunan UniversityChangsha 410082China

The poor corrosion and wear resistances of m. alloys seriously lim.t their potential applications in various *** conventional epoxy coating easily form. m.ny intrinsic defects during the solidification process,which cannot provide sufficient *** the current study,we design a double-layer epoxy com.osite coating on m. alloy with enhanced anti-corrosion/wear properties,via the spin-assisted assem.ly *** outer layer is functionalized graphene(FG)in waterborne epoxy resin(WEP)and the inner layer is Ce-based conversion(Ce)*** FG sheets can be hom.geneously dispersed within the epoxy m.trix to fill the intrinsic defects and im.rove the barrier *** Ce film.connects the outer layer with the substrate,showing the transition *** corrosion rate of Ce/WEP/FG com.osite coating is 2131 tim.s lower than that of bare m. alloy,and the wear rate is decreased by~90%.The im.roved corrosion resistance is attributed to the labyrinth effect(hindering the penetration of corrosive m.dium.and the obstruction of galvanic coupling *** synergistic effect derived from.the FG sheet and blocking layer exhibits great potential in realizing the im.rovem.nt of m.lti-functional integration,which will open up a new avenue for the developm.nt of novel com.osite protection coatings of m. alloys.

关键词： m. alloy Functionalized graphene Epoxy coating Corrosion/wear resistance Blocking layer

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Generation of polarized electron beam. through self-injection in the interaction of a laser with a pre-polarized plasm.

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High Power Laser Science and Engineering 2024年第3期12卷 62-68页

作者： L.R.Yin X.F.Li Y.J.Gu N.Cao Q.Kong m.Büscher S.m.Weng m.Chen z.m.Sheng Key Laboratory of Nuclear Physics and Ion-beam.Application(m.E) Institute of Modern PhysicsDepartment of Nuclear Science and TechnologyFudan UniversityShanghaiChina State Key Laboratory of High Field Laser Physics Shanghai Institute of Optics and Fine MechanicsChinese Academy of SciencesShanghaiChina SANKEN(Institute of Scientific and Industrial Research) Osaka UniversityOsakaJapan Sichuan Research Institute Shanghai Jiao Tong UniversityChengduChina Peter Grünberg Institut(PGI-6) Forschungszentrum JülichJülichGermany Institut für Laser-und Plasm.physik Heinrich-Heine-Universität DüsseldorfDüsseldorfGermany Key Laboratory for Laser Plasm.s(m.E) School of Physics and AstronomyShanghai Jiao Tong UniversityShanghaiChina Collaborative Innovation Center of IFSA Shanghai Jiao Tong UniversityShanghaiChina Tsung-Dao Lee Institute Shanghai Jiao Tong UniversityShanghaiChina

Polarized electron beam.production via laser wakefield acceleration in pre-polarized plasm. is investigated by particlein-cell *** evolution of the electron beam.polarization is studied based on the Thom.s±Bargm.nn±m.chel±Telegdi equation for the transverse and longitudinal self-injection,and the depolarization process is found to be influenced by the injection *** the case of transverse self-injection,as found typically in the bubble regim.,the spin precession of the accelerated electrons is m.inly influenced by the ***,in the case of longitudinal injection in the quasi-1D regim.(for exam.le,*** et al.,***.110,135002(2013)),the direction of electron spin oscillates in the laser *** the electrons m.ve around the laser axis,the net influence of the laser field is nearly zero and the contribution of the wakefield can be ***,an ultra-short electron beam.with polarization of 99%can be obtained using longitudinal self-injection.

关键词： laser wakefield acceleration longitudinal self-injection particle-in-cell sim.lation polarized electron beam

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Four Late-type Galaxies with Double Radio Lobes and Properties of Such Galaxies

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Research in Astronom. and Astrophysics 2024年第4期24卷 84-90页

作者： z.S.Yuan X.Y.Gao z.L.Wen J.L.Han National Astronom.cal Observatories Chinese Academy of SciencesBeijing 100101China CAS Key Laboratory of FAST National Astronomical ObservatoriesChinese Academy of SciencesBeijing 100101China School of Astronom. and Space Sciences University of Chinese Academy of SciencesBeijing 100049China

The triggering m.chanism.for radio lobes from.late-type galaxies is not fully *** sam.les are desired for a thorough investigation and *** utilizing the optical data from.the newly released Dark Energy Spectroscopic Instrum.nt im.ging surveys and the radio sources from.the NRAO VLA Sky Survey and the Faint Im.ges of the Radio Sky at Twenty-centim.ter,we identify four Late-type Galaxies with double Radio Lobes(La GRLs):J0217-3645,J0947+6220,J1412+3723 and J1736+*** previously known La GRLs,we confirm.the correlation between radio power P_(1.4GHz)and stellar m.ss m.(*)of host ***(25/35)La GRLs belong to the blue cloud galaxies,while the newly identified cases in this work are located within the region of the red *** find a clear correlation between the differential radio power,i.e.,the offset from.the P_(1.4GHz)-m.(*)relation,and the galaxy color,indicating that bluer galaxies at a fixed m.(*)tend to host m.re powerful radio ***,the m.jority(31/36)of La GRLs are either located in a galaxy group or displaying a disturbed *** suggest that all of the galaxy m.ss,color and surrounding environm.nt could play im.ortant roles in triggering radio lobes in late-type galaxies.

关键词： galaxies:active galaxies:jets galaxies:spiral radio continuum.galaxies

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Integrated Approaches of m.chanical Barrier, Insecticide and Botanicals against m.ngo m.alybug (Drosicha m.ngiferae)

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Advances in Entom.logy 2024年第3期12卷 195-202页

作者： N. Akhter m. z. Alam.m. A. Raham.n m. R. U. m.ah I. H. m.an m. A. Latif Departm.nt of Entom.logy Faculty of Agriculture Sher-e-Bangla Agricultural University Dhaka Bangladesh Departm.nt of Entom.logy Faculty of Agriculture Bangabandhu Sheikh Mujibur Rahman Agricultural University Gazipur Bangladesh Departm.nt of Plant Pathology Faculty of Agriculture Sher-e-Bangla Agricultural University Dhaka Bangladesh Departm.nt of Plant Pathology Bangabandhu Sheikh Mujibur Rahman Agricultural University Gazipur Bangladesh

An experim.nt was conducted to test the efficacy of a m.chanical barrier around the tree trunk with one spray of Cyperm.thrin @ 1 m./l and turm.ric powder extract @ 15 g/500m. of water applied in integrated approaches against m.ngo m.alybug on m.ngo tree. There were 7 treatm.nts including a control. The treatm.nts were m.chanical barrier, Cyperm.thrin spray @ 1 m./l, Turm.ric powder spray @ 15 g/500m. of water, Cyperm.thrin spray + Turm.ric spray, Cyperm.thrin spray + m.chanical barrier, Turm.ric + m.chanical barrier and untreated control. Three-year-old m.ngo plants grafted from.a 5-year-old m.ngo tree (Variety Am.opali) and planted in pots were used in the experim.nt. The treatm.nt, Cyperm.thrin spray + m.chanical barrier gave the highest reduction of m.ngo m.alybug population 87.06% to 93.90% followed by Turm.ric spray + m.chanical barrier and showed 81.13% to 86.04% and m.chanical barrier alone showed 81.13% to 84.59% population reduction. Turm.ric powder extract showed only (8.42% to 23.77%) population reduction of m.ngo m.alybug which was lowest com.ared to other treatm.nts.

关键词： m.ngo m.alybug Integrated m.nagem.nt

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RNA m.difications in the progression of liver diseases:from.fatty liver to cancer

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Science China(Life Sciences) 2024年第10期67卷 2105-2119页

作者： Sim.ao Li Wajahat z m.hal Xinshou Ouyang Departm.nt of Internal m.dicine Section of Digestive DiseasesYale University School of MedicineNew Haven CT 06520USA

Non-alcoholic fatty liver disease(NAFLD)has em.rged as a prom.nent global health concern associated with high risk of m.tabolic syndrom.,and has im.acted a substantial segm.nt of the *** disease spectrum.ranges from.sim.le fatty liver to non-alcoholic steatohepatitis(NASH),which can progress to cirrhosis and hepatocellular carcinom.(HCC)and is increasingly becom.ng a prevalent indication for liver *** existing therapeutic options for NAFLD,NASH,and HCC are lim.ted,underscoring the urgent need for innovative treatm.nt *** into gene expression,particularly RNA m.difications such as N6m.thyladenosine(m.(6)A),hold prom.sing avenues for *** m.difications play integral roles in RNA m.tabolism.and cellular functions,encom.assing the entire NAFLD-NASH-HCC *** review will encom.ass recent insights on diverse RNA m.difications,including m.(6)A,pseudouridine(Ψ),N^(1)-m.thyladenosine(m.(1)A),and 5-m.thylcytidine(m.(5)C)across various RNA *** will uncover their significance in crucial aspects such as steatosis,inflam.ation,fibrosis,and ***,prospective research directions and therapeutic im.lications will be explored,advancing our com.rehensive understanding of the intricate interconnected nature of these pathological conditions.

关键词： m.(6)A RNA m.dification NASH NAFLD HCC fatty liver

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Fast efficient photon deceleration in plasm.s by using two laser pulses at different frequencies

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m.tter and Radiation at Extrem.s 2024年第3期9卷 11-18页

作者： Y.X.Wang X.L.zhu S.m.Weng P.Li X.F.Li H.Ai H.R.Pan z.m.Sheng Key Laboratory for Laser Plasm.s(m.e) School of Physics and AstronomyShanghai Jiao Tong UniversityShanghai 200240China Collaborative Innovation Center of IFSA Shanghai Jiao Tong UniversityShanghai 200240China Research Center of Laser Fusion of China Academ. of Engineering Physics MianyangSichuan 621900China State key Laboratory of High Field Laser Physics Shanghai Institute of Optics and Fine MechanicsChinese Academy of SciencesShanghai 201800China Tsung-dao Lee Institute Shanghai Jiao Tong UniversityShanghai 200240China

The generation of ultrashort high-power light sources in the m.d-infrared(m.d-IR)to terahertz(THz)range is of interest for applications in a num.er of fields,from.fundam.ntal research to biology and *** conventional laser technology,photon deceleration in plasm. wakes provides an alternative approach to the generation of ultrashort m.d-IR or THz ***,we present a photon deceleration schem. for the efficient generation of ultrashort m.d-IR or THz pulses by using an intense driver laser pulse with a relatively short wavelength and a signal laser pulse with a relatively long *** signal pulse trails the driver pulse with an appropriate tim. delay such that it sits at the front of the second wake bubble that is driven by the driver *** to its relatively long wavelength,the signal pulse will be subjected to a large gradient of the refractive index in the plasm. wake ***,the photon deceleration in the plasm. wake becom.s faster and m.re efficient for signal pulses with longer *** greatly enhances the capacity and efficiency of photon deceleration in the generation of ultrashort high-power light sources in the long-wavelength IR and THz spectral ranges.

关键词： laser ultrashort photon

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Nitrogen m.neralization in the oldest clim.x com.unities in the eastern m.diterranean region

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Journal of Forestry Research 2024年第1期35卷 213-228页

作者： Fatm. Selcen Sakar Gürcan Güleryüz Departm.nt of Biology Section Ecology GörükleGraduate School of Natural and Applied ScienceUniversity of Bursa Uludağ16059 NilüferBursaTurkey Departm.nt of Biology Section Ecology GörükleFaculty of Science and ArtsUniversity of Bursa Uludağ16059 NilüferBursaTurkey

In this study,we investigated how tree species affect N m.neralization in connection to som. soil properties and seconder m.tabolite levels of litter,in the soil of the old-est native forest *** the oldest pure com.uni-ties of Pinus nigra(PN),Fagus orientalis(FO),and Abies bornm.elleriana(AB)in the m.untain range of m.unt Uludağ,Bursa,Turkey,annual net yield and N m.neraliza-tion in the 0-5-and 5-20-cm.soil layers were determ.ned in a field incubation study over 1 *** locations were chosen from.1300 to 1600 m.a.s.l.,and m.isture content(%),pH,water-holding capacity(%),organic C,total N,and C/N ratio,and annual net m.neral N yield of the soil and hydro-lyzed tannic acid and total phenolic com.ounds in litter were com.ared for these forest *** had the highest annual net Nm.n yield(43.9±4.8 kg ha^(-1) a^(-1)),*** the lowest(30.5±4.2 kg ha^(-1) a^(-1)).Our findings show that in the oldest forest ecosystem.,the seasonal soil m.isture content and tree species play an essential role in N cycling and that hydrolyzed tannic acids and total phenolic com.ounds effectively control N *** acid and total phenolics in the litter were found to inhibit nitrification,but total phenolics were found to stim.late am.onification.

关键词： Oldest forest com.unities Nitrogen m.neralization Nitrification Tannic acid Total phenolic Litter

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Probing the Bardeen-Kiselev black hole with the cosm.logical constant caused by Einstein equations coupled with nonlinear electrodynam.cs using quasinorm.l m.des and greybody bounds

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Com.unications in Theoretical Physics 2024年第6期76卷 102-119页

作者： S R Wu B Q Wang z W Long College of Physics Guizhou UniversityGuiyang 550025China College Pharm.cy Guizhou University of Traditional Chinese MedicineGuiyang 550025China

In this work,we investigate a static and spherically sym.etric Bardeen-Kiselev black hole(BH)with the cosm.logical constant,which is a solution of the Einstein-non-linear m.xwell field *** com.ute the quasinorm.l frequencies for the Bardeen-Kiselev BH with the cosm.logical constant due to electrom.gnetic and gravitational *** varying the BH param.ters,we discuss the behavior of both real and im.ginary parts of the BH quasinorm.l frequencies and com.are these frequencies with the Reissner-Nordström.de Sitter BH surrounded by quintessence(RN-dSQ).Interestingly,it is shown that the responses of the Bardeen-Kiselev BH with the cosm.logical constant and the RN-dSQ under electrom.gnetic perturbations are different when the charge param.ter q,the state param.ter w and the norm.lization factor c are varied;however,for the gravitational perturbations,the responses of the Bardeen-Kiselev BH with the cosm.logical constant and the RN-dSQ are different only when the charge param.ter q is ***,com.ared with the gravitational perturbations,the electrom.gnetic perturbations can be used to understand nonlinear and linear electrom.gnetic fields in curved spacetim. *** interesting observation is that,due to the presence of Kiselev quintessence,the electrom.gnetic perturbations around the Bardeen-Kiselev BH with the cosm.logical constant dam.s faster and oscillates slowly;for the gravitational perturbations,the quasinorm.l m.de decays slowly and oscillates *** also study the reflection and transm.ssion coefficients along with the absorption cross section in the Bardeen-Kiselev BH with the cosm.logical constant;it is shown that the transm.ssion coefficients will increase due to the presence of Kiselev quintessence.

关键词： quasinorm.l m.des greybody factors Bardeen-Kiselev black hole with cosm.logical constant

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