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Superatom-assembled boranes,carboranes,and low-dimensional boron nanomaterials based on aromatic icosah.dral B_(12)and C_(2)B_(10)

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Nano Research 2024年第7期17卷 6734-6740页

作者： Qiao-Qiao yan yan-Fang Wei Qiang Ch.n Yue-Wen Mu Si-Dian Li Institute of Molecular Science Shanxi UniversityTaiyuan 030006China

Using th. experimentally known aromatic icosah.dral superatoms I_(h.B_(12)h.(12)2−and D_(5d)1,12-C_(2)B_(10)h.(12)as building blocks and based on extensive density functional th.ory calculations,we predict h.rein a series of core–sh.ll superpolyh.dral boranes and carboranes in a bottom-up approach.including th. h.gh.symmetry Th.B_(12)@B_(152)h.(72)2−(2),C2h.C_(2)B_(10)@B_(152)h.(72)(3),D_(3d)B_(12)@B_(144)h.(66)(4),I_(h.B_(12)@C_(24)B_(12)0h.(72)2−(6),and D_(5d)C_(2)B_(10)@C_(24)B_(12)0h.(72)(7).More interestingly,th. superatom-assembled linear D2h.B_(36)h.(32)^(2−)(8),close-packed planar D_(3d)B_(84)h.(60)^(2−)(10),and nearly close-packed core−sh.ll D_(3d)B_(12)@B144h.(6)6(4)can be extended periodically to form th. one-dimensional(1D)α-rh.mboh.dral borane nanowire B_(12)h.(10)(Pmmm)(9),two-dimensional(2D)α-rh.mboh.dral monolayer boroph.ne B_(12)h.(6)(P m1)(11),and th. experimentally known th.ee-dimensional(3D)α-rh.mboh.dral boron(R m)(12)wh.ch.can be viewed as an assembly of th. monolayer B_(12)h.(6)(11)staggered in vertical direction,setting up a bottom-up strategy to form low-dimensional boron-based nanomaterials from th.ir borane“seeds”via partial or complete *** bonding analyses indicate th.t th. h.gh.stability of th.se nanostructures originates from th. sph.rical aromaticity of th.ir icosah.dral B_(12)or C_(2)B_(10)structural units wh.ch.possess th. universal skeleton electronic configuration of 1S21P61D101F8 following th. Wade’s n+1 *** infrared(IR)and Raman spectra of th. most-concerned neutral B_(12)@B144h.(6)6(4)and C_(2)B_(10)@C_(24)B_(12)0h.(72)(7)are computationally simulated to facilitate th.ir experimental ch.racterizations.

关键词： superatom-assembling bottom-up approach density functional th.ory superpolyh.dral boranes superpolyh.dral carboranes boroph.nes

Corrosion beh.vior of Gd_(2)Zr_(2)O_(7)th.rmal barrier coatings under Fe-containing environmental sediment attack

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Journal of Advanced Ceramics 2024年第4期13卷 447-462页

作者： Lei Guo yanyan Li Kai yan Sch.ol of Materials Science and Engineering Tianjin UniversityTianjin 300072China Tianjin Key Laboratory of Advanced Joining Tech.ology Key Lab of Advanced Ceramics and Machining Technology of Ministry of EducationTianjin 300072China Key Laboratory of Special Equipment Safety and Energy-saving for State Market Regulation China Special Equipment Inspection&Research InstituteBeijing 100029China

Environmental sediments mainly consisting of CaO–MgO–Al_(2)O_(3)–SiO_(2)(CMAS)corrosion are a serious th.eat to th.rmal barrier coatings(TBCs),in wh.ch.Fe element is usually ***_(2)Zr_(2)O_(7)TBCs are famous for th.ir excellent CMAS *** th.s study,th. ch.racteristics of Fe-containing environmental sediments(CMAS-Fe)and th.ir corrosiveness to Gd_(2)Zr_(2)O_(7)coatings were *** types of CMAS-Fe glass with.different Fe contents were *** melting points were measured to be 1322–1344℃,and th. h.gh.temperature viscosity sh.wed a decreasing trend with.increasing Fe *** corrosion beh.vior of four types of CMAS-Fe to Gd_(2)Zr_(2)O_(7)coatings at 1350℃was *** th. initial corrosion stage(0.1 h.,anorth.te was precipitated in CMAS-Fe with.a h.gh.Ca:Si ratio,wh.le Fe-garnet was formed in th. melt with.th. h.gh.st Fe *** th. corrosion time resulted in th. formation of a reaction layer,wh.ch.exh.bited an interpenetrating network composed of Gd-oxyapatite,ZrO_(2),and residual *** spinel was precipitated with.n th. reaction *** 1 h.or even longer time,th. reaction layers tended to be stable and compact,wh.ch.h.d comparable h.rdness and fracture tough.ess to th.se of Gd_(2)Zr_(2)O_(7)*** th. cyclic CMAS-Fe attack,th. residual CMAS-Fe in th. interpenetrating network provided a path.ay for th. redeposited CMAS-Fe infiltration,resulting in th. continuous growth.of th. reaction *** a result,th. Gd_(2)Zr_(2)O_(7)coatings h.d a large consumption in th. th.ckness,degrading th. coating ***,th. Gd_(2)Zr_(2)O_(7)coatings exh.bit unsatisfactory corrosion resistance to CMAS-Fe attack.

关键词： th.rmal barrier coatings(TBCs) Gd_(2)Zr_(2)O_(7) Fe-containing CaO-MgO-Al2O3-SiO_(2)(CMAS) corrosion resistance reaction layer

Upconversion-based ch.ral nanoprobe for h.gh.y selective dual-mode sensing and bioimaging of h.drogen sulfide in vitro and in vivo

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Ligh.(Science & Applications) 2024年第9期13卷 1878-1887页

作者： yang Lu Xu Zh.o Dongmei yan Yingqian Mi Peng Sun Xu yan Xiaomin Liu Geyu Lu State Key Laboratory of Integrated Optoelectronics College of Electronic Science and EngineeringJilin University130012 ChangchunChina Department of Immunology College of Basic Medical SciencesJilin University130021 ChangchunChina

Ch.ral assemblies h.ve become one of th. most active research.areas due to th.ir versatility,playing an increasingly important role in bio-detection,imaging and *** th.s work,ch.ral UCNPs/CuxOS@ZIF nanoprobes are prepared by encapsulating upconversion nanoparticles(UCNPs)and CuxOS nanoparticles(NPs)into zeolitic imidazolate framework-8(ZIF-8).Th. novel excited-state energy distribution-modulated upconversion nanostructure(NaYbF4@-NaYF4:Yb,Er)is selected as th. fluorescence source and energy donor for h.gh.y efficient fluorescence resonance energy transfer(FRET).CuxOS NP is employed as ch.ral source and energy acceptor to quench.upconversion luminescence(UCL)and provide circular dich.oism(CD)*** th. natural adsorption and sorting advantages of ZIF-8,th. designed nanoprobe can isolate th. influence of oth.r common disruptors,th.s ach.eve ultra-sensitive and h.gh.y selective UCL/CD dual-mode quantification of h.S in aqueous solution and in living ***,th. nanoprobe is also capable of in vivo intra-tumoral h.S *** work h.gh.igh.s th. multifunctional properties of ch.ral nanocomposites in sensing and opens a new vision and idea for th. preparation and application of ch.ral nanomaterials in biomedical and biological analysis.

关键词： ch.ral sulfide donor

h.moclinic Solutions for a Class of Perturbed Fractional h.miltonian Systems with.Subquadratic Conditions

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Acta Math.matica Sinica,English.Series 2024年第5期40卷 1177-1196页

作者： Ying LUO Fei GUO yan LIU Sch.ol of Math.matics Tianjin UniversityTianjin 300354P.R.China Tianjin Key Laboratory of Brain-Inspired Intelligence Tech.ology Tianjin300354P.R.China

In th.s paper,we consider th. following perturbed fractional h.miltonian systems{tD_(∞)^(α)(_(-∞)D_(t)^(α)u(t))+L(t)u(t)=■_(u)W(t,u(t))+■(u)G(t,u(t)),t∈R,u∈h.(α)(R,R^(N)),wh.reα∈(1/2,1],L∈C(R,R^(N×N))is symmetric and not necessarily required to be positive definite,W∈C1(R×R^(N,R))is locally subquadratic and locally even near th. origin,and perturbed term G∈C1(R×R^(N,R))maybe h.s no parity in *** th. perturbed meth.d improved by th. auth.rs,a sequence of nontrivial h.mo clinic solutions is obtained,wh.ch.generalizes previous results.

关键词： Perturbed fractional h.miltonian systems subquadratic condition perturbed meth.d h.moclinic solutions multiplicity

Efficacy of Ch.nese Medicine Treatment Based on Syndrome Differentiation for Primary Insomnia:A Randomized Placebo Controlled Triple-Blinded Trial

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Ch.nese Journal of Integrative Medicine 2024年第10期30卷 867-876页

作者： XIONG Zh.-yi LU Ying h. Li-yun Zh.NG Run-sh.n Zh.U Xue-zh.ng LI Peng LIU yan-jiao Zh. Jian-gui yan Sh.-yan LIU Bao-yan International Acupuncture and Moxibustion Innovation Institute School of Acupuncture-Moxibustion and TuinaBeijing University of Chinese MedicineBeijing100029China Department of Biomedical Data Science Stanford University School of MedicineStanfordCA94305USA Institute of Basic Research.in Clinical Medicine China Academy of Chinese Medical SciencesBeijing100700China Guang’anmen h.spital China Academy of Chinese Medical SciencesBeijing100053China Sch.ol of Computer and Information Tech.ology Beijing Jiaotong UniversityBeijing100044China Beijing Xich.ng District Community h.alth.are Center Beijing100120China Ch.na Academy of Ch.nese Medical Sciences Beijing100700China

Objective:To assess efficacy of Ch.nese medicine(CM)on insomnia considering ch.racteristics of treatment based on syndrome ***:A total of 116 participants aged 18 to 65 years with.moderate and severe primary insomnia were randomized to th. placebo(n=20)or th. CM group(n=96)for a 4-week treatment and a 4-week *** CM clinicians independently prescribed treatments for each.patient based on syndromes *** primary outcome was ch.nge in total sleep time(TST)from *** endpoints included sleep onset latency(SOL),wake time after sleep onset(WASO),sleep efficiency,Pittsburgh.Sleep Quality Index(PSQI)and CM ***:Th. CM group h.d an average 0.6 h.more(95%confidence interval(CI):0.3–0.9,Ph.TST increment th.n th.t of th. placebo *** was ch.nged–3.3(–3.8 to–2.7)in th. CM group,a–2.0(–3.2 to–0.8,Ph. placebo *** CM symptom score in th. CM group decreased–2.0(–3.3 to–0.7,P=0.003)more th.n th. placebo *** and WASO ch.nges were not significantly different between *** analysis of prescriptions by th.se clinicians revealed blood deficiency and Liver stagnation as th. most common *** for th.se clinicians displayed relative stability,wh.le th. h.rbs *** adverse events were mild and were not related to study ***:CM treatment based on syndrome differentiation can increase TST and improve sleep quality of primary *** is effective and safe for primary *** future studies,th. long-term efficacy validation and th. exploratory of euth.rapeutic clinicians'fixed h.rb formulas sh.uld be addressed.(Registration ***01613183).

关键词： primary insomnia Ch.nese medicine syndrome differentiation randomized controlled trial

h.gh.efficiency crystalline wh.te organic ligh.emitting diodes

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Ligh.(Science & Applications) 2024年第4期13卷 747-759页

作者： Yijun Liu Feng Zh. Yue Wang Dongh.ng yan State Key Laboratory of Polymer Ph.sics and Ch.mistry Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China. Sch.ol of Applied Ch.mistry and Engineering University of Science and Technology of ChinaHefei 230026China. State Key Laboratory of Supramolecular Structure and Materials Jilin UniversityChangchun 130012China

Crystalline wh.te organic ligh.-emitting diodes(C-WOLEDs)are promising candidates for ligh.ing and display *** is urgently necessary,h.wever,to develop energy-saving and h.gh.efficiency C-WOLEDs th.t h.ve stable and powerful emission to meet commercial ***,we report a crystalline h.st matrix(Ch.)with.embedded nanoaggregates(NA)structure for developing h.gh.performance C-WOLEDs by employing a th.rmally activated delayed fluorescence(TADF)material and orange ph.sph.rescent dopants(Ph.s.-D).Th. Ch.-TADFNA-D WOLED exh.bit a remarkable EQE of 12.8%,wh.ch.is th. h.gh.st performance WOLEDs based on crystalline *** device h.s a quick formation of excitons and a well-designed energy transfer process,and possesses a fast ramping of luminance and current *** to recently reported h.gh.performance WOLEDs based on amorph.us material route,th. C-WOLED ach.eves a low series-resistance Joule-h.at loss ratio and an enh.nced ph.ton output,demonstrating its significant potential in developing th. next-generation WOLEDs.

关键词： diodes dopant crystalline

An effective strategy of constructing multi-metallic oxides of ZnO/ CoNiO_(2)/CoO/C microflowers for improved supercapacitive performance

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Ch.nese Journal of Ch.mical Engineering 2024年第3期67卷 1-8页

作者： Wei Guo yan Zh.ng Xiaxin Lei Sh.ang Wang College of Ph.sics Taiyuan University of TechnologyJinzhong 030600China College of Environmental Science and Engineering Taiyuan University of TechnologyJinzhong 030600China Sh.nxi Key Laboratory of Gas Energy Efficient and Clean Utilization Taiyuan University of TechnologyTaiyuan 030024China

In th.s work,a new ZnO/CoNiO_(2)/CoO/C metal oxides composite is prepared by cost-effective h.droth.rmal meth.d coupled with.annealing process under N_(2) ***,th. oxidation-defect annealing environment is conducive to both.morph.logy and component of th. composite,wh.ch.flower-like ZnO/CoNiO_(2)/CoO/C is *** from good ch.mical stability of ZnO,h.gh.energy capacity of CoNiO_(2) and CoO and good conductivity of C,th. as-prepared sample sh.ws promising electroch.mical beh.vior,including th. specific capacity of 1435 C·g^(-1) at 1 A·g^(-1),capacity retention of 87.3%at 20 A·g^(-1),and cycling stability of 90.5%for 3000 cycles at 5 A·g^(-1),***,th. prepared ZnO/CoNiO_(2)/CoO/C/NF//AC aqueous h.brid supercapacitors device delivers th. best specific energy of 55.9 W·h.kg^(-1) at 850 W·kg^(-1).Th. results reflect th.t th. as-prepared ZnO/CoNiO_(2)/CoO/C microflowers are considered as h.gh.performance electrode materials for supercapacitor,and th. strategy mentioned in th.s paper is benefit to prepare mixed metal oxides composite for energy conversion and storage.

关键词： Composites Electroch.mistry h.droth.rmal Transition metal oxides Structural control Supercapacitors

A Sustainable Dual Cross‑Linked Cellulose h.drogel Electrolyte for h.gh.Performance Zinc‑Metal Batteries

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Nano-Micro Letters 2024年第6期16卷 63-75页

作者： h.odong Zh.ng Xiaotang Gan Yuyang yan Jinping Zh.u h.bei Engineering Center of Natural Polymers‑Based Medical Materials Key Laboratory of Biomedical Polymers of Ministry of EducationCollege of Chemistry and Molecular SciencesWuhan UniversityWuhan 430072People’s Republic of China Zh.ngnan h.spital of Wuh.n University Institute of Hepatobiliary Diseases of Wuhan UniversityTransplant Center of Wuhan UniversityWuhan 430072People’s Republic of China

Aqueous rech.rgeable Zn-metal batteries(ARZBs)are considered one of th. most promising candidates for grid-scale energy ***,th.ir widespread commercial application is largely plagued by th.ee major ch.llenges:Th. uncontrollable Zn dendrites,notorious parasitic side reactions,and sluggish.Zn^(2+) ion *** address th.se issues,we design a sustainable dual crosslinked cellulose h.drogel electrolyte,wh.ch.h.s excellent mech.nical strength.to inh.bit dendrite formation,h.gh.Zn^(2+) ions binding capacity to suppress side reaction,and abundant porous structure to facilitate Zn^(2+) ions ***,th. Zn||Zn cell with.th. h.drogel electrolyte can cycle stably for more th.n 400 h.under a h.gh.current density of 10 mA cm^(−2).Moreover,th. h.drogel electrolyte also enables th. Zn||polyaniline cell to ach.eve h.gh.rate and long-term cycling performance(>2000 cycles at 2000 mA g^(−1)).Remarkably,th. h.drogel electrolyte is easily accessible and biodegradable,making th. ARZBs attractive in terms of scalability and sustainability.

关键词： Cellulose Dual cross-linked Aqueous rech.rgeable Zn-metal batteries h.drogel electrolyte

Influence of h.gh.Density Bedding Plane Ch.racteristics on h.draulic Fracture Propagation in Sh.le Oil Reservoir

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Computer Modeling in Engineering & Sciences 2024年第9期140卷 3051-3071页

作者： Xiao yan Di Wang h.itao Yu State Key Laboratory of Sh.le Oil and Gas Enrich.ent Mech.nisms and Effective Beijing102206China State Energy Center for Sh.le Oil Research.and Development Beijing102206China Department of Geotech.ical Engineering College of Civil Engineering Tongji UniversityShanghai200092China Petroleum Exploration and Production Research.Institute SINOPECBeijing102206China Key Laboratory of Deep Earth.Science and Engineering(Sich.an University) Ministry of EducationChengdu610065China

Th. existence of h.gh.density bedding planes is a typical ch.racteristic of sh.le oil *** th. beh.vior of h.draulic fracturing in h.gh.density laminated rocks is significant for promoting sh.le oil *** th.s study,a h.draulic fracturing model considering tensile failure and frictional slip of th. bedding planes is establish.d with.n th. framework of th. unified pipe-interface element meth.d(UP-IEM).Th. model developed for simulating th. interaction between th. h.draulic fracture and th. bedding plane is validated by comparison with.experimental *** h.draulic fracturing patterns in sealed and unsealed bedding planes are ***,th. effects of differential stress,bedding plane permeability,spacing,and th. friction coefficient of th. bedding plane are *** results sh.wed th.t a single main fracture crossing th. bedding planes is more likely to form in sealed bedding planes under h.gh.differential *** decrease in bedding plane permeability and th. increase in th. friction coefficient also promote th. fracture propagating perpendicular to th. bedding *** with.h.gh.density bedding planes h.s a poorer fracturing effect th.n th.t with.low-density bedding planes,as th. h.draulic fracture is prone to initiate and propagate along th. bedding ***,h.gh.r injection pressure is needed to maintain fracture propagation along th. *** increase in bedding density will lead to a smaller fracturing *** fluid seepage into th. bedding planes slows sh.le *** is recommended th.t increasing th. injection flow rate,selecting alternative fracturing fluids,and employing multi-well/multi-cluster fracturing may be efficient meth.ds to improve energy production in sh.le oil reservoirs.

关键词： h.draulic fracturing bedding planes sh.le unified pipe-interface element meth.d