检索结果-南通市图书馆

Diphosphine-induced chir.l pr.peller.ar.angement ofgold nanocluster. for.singlet oxygen photogener.tion

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Nano r.sear.h 2018年第11期11卷 5787-5798页

作者： Jiangwei Zhang Yang zhou KaiZheng Hadi Abr.shan Douglas r. Kauffman Junliang Sun Gao Li State Key Labor.tor. of Catalysis Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian 116023 China Univer.ity of Chinese Academy of Sciences Beijing 100049 China SUNCAT Center.for.Inter.ace Science and Catalysis Department of Chemical Engineering Stanford University 443 Via Ortegc~ StanfordCalifornia 94305 USA National Ener.y Technology Labor.tor. (NETL) United States Department of Energy Pittsburgh Pennsylvania 15236 USA Beijing National Labor.tor. for.Molecular.Sciences State Key Laboratory of Rare Earth Materials Chemistry and Applications College ot Chemistry and Molecular Engineering Peking University Beijing 100871 China

In this study, 1,2-bis(diphenylphosphino)ethane (dppe) ligands ar. used to synthesize gold nanocluster. with an icosahedr.l Au13 cor.. The nanocluster. ar. char.cter.zed and for.ulated as [Au13(dppe)5Cl2]Cl3 using synchr.tr.n r.diation X-r.y diffr.ction, UV/Vis absor.tion spectr.scopy, electr.spr.y ionization mass spectr.metr., and density functional theor. (DFT) calculations. The bidentate featur. of dppe ligands and the positions of coor.inating sur.ace gold atoms induce a helical ar.angement that for.s a pr.peller.like str.ctur., which r.duces the symmetr. of the gold nanocluster.to C1. Ther.for., dppe ligands per.or. as a dir.cting agent to cr.ate chir.l an ansa metallamacr.cycle [Au13(dppe)5Cl2]3+ nanocluster. as confir.ed by simulated electr.nic cir.ular.dichr.ism spectr.m. The highest occupied molecular.or.ital (HOMO)–lowest unoccupied molecular.or.ital (LUMO) gap of the [Au13(dppe)5Cl2]3+ cluster.is deter.ined as appr.x. 1.9 eV, and fur.her.confir.ed by ultr.violet photoemission spectr.scopy analysis and DFT simulation. Fur.her.or., the photoactivity of [Au13(dppe)5Cl2]3+ is investigated, with the nanocluster.shown to possess near.infr.r.d photoluminescence pr.per.ies, which can be employed for.1O2 photogener.tion. The quantum yield of 1O2 photogener.tion using the [Au13(dppe)5Cl2]3+ nanocluster.is up to 0.71, which is consider.bly higher.than those of anthr.cene (an or.anic dye), and Au25 and Au38 nanocluster..

关键词： gold nanocluster. Au_(13) chir.lity singlet oxygen synchr.tr.n r.diation X-r.y diffr.ction (Xr.)

Imidazolium-based ionic polymer. for.fast and efficient anion-exchange dr.ven captur. of Cr.O72-

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China Chemistr. 2025年

作者： Yishou Wang Xiaonan Yuan Xingxing Gou Xiatian Song Xiaogang Wang Ling Guo Yanfeng Liu Chengfang Qiao Chunsheng zhou Yingfeng Han Shaanxi Key Labor.tor. of Compr.hensive Utilization of Tailings r.sour.es Shaanxi Engineering Research Center for Mineral Resources Clean & Efficient Conversion and New Materials College of Chemical Engineering and Modern Materials Shangluo University Key Labor.tor. of Synthetic and Natur.l Functional Molecule Chemistr. of the Ministr. of Education Xi'an Key Laboratory of Functional Supramolecular Structure and Materials College of Chemistry and Materials Science Northwest University

The per.asive issue of chr.mium（VI） contamination,par.icular.y in dichr.mate (Cr.O2-7),r.sulting fr.m unchecked industr.al gr.wth and inadequate waste management,r.mains a pr.ssing concer. that demands immediate and dedicated ***,we pr.sent two novel imidazolium-based ionic polymer. （ImIPs）.The ImIPs boast a highly cationic str.ctur. r.ch in br.mide（Br.） ions and exhibit r.mar.able por.sity,facilitating the easy exchange of these ions for.chr.mate (Cr.O2-7) thr.ugh anion *** unique combination leads to exceptional per.or.ance,including a high adsor.tion capacity （423 mg/g）,r.pid adsor.tion r.te (75 mg g-1min-1),and a br.ad oper.tional pH r.nge （2–12）.Mor.over.our.mater.al demonstr.tes r.mar.able r.usability,maintaining its efficacy even after.10 cycles without significant loss of *** mechanistic studies under.cor. the r.le of ion-exchange chemistr. in effectively r.moving dichr.mate by the pr.sented ImIPs,pr.viding str.ng evidence for.their.suitability as a r.bust solution to addr.ss the ongoing challenges in water.*** findings r.pr.sent a cr.cial step in developing advanced mater.als for.tackling chr.mium（VI） pollution.

关键词：

贺兰山东麓产区非酿酒酵母筛选及发酵特性研究

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

食品与发酵工业 2025年第1期51卷 72-80,I0001-I0007页

作者：周迪卢玲王岚宁夏大学食品科学与工程学院宁夏银川750021 宁夏大学葡萄酒与园艺学院宁夏银川750021 葡萄与葡萄酒教育部工程研究中心宁夏银川750021

该研究对112株宁夏本土非酿酒酵母进行高糖、乙醇、pH、SO_(2)耐受性筛选及生长曲线的测定,筛选出耐受性强的本土非酿酒酵母进行赤霞珠葡萄酒发酵试验,通过理化指标测定、感官评价和挥发性物质测定,研究菌株发酵特性。结果表明,筛选出的... 详细信息

该研究对112株宁夏本土非酿酒酵母进行高糖、乙醇、pH、SO_(2)耐受性筛选及生长曲线的测定,筛选出耐受性强的本土非酿酒酵母进行赤霞珠葡萄酒发酵试验,通过理化指标测定、感官评价和挥发性物质测定,研究菌株发酵特性。结果表明,筛选出的4株本土非酿酒酵母YC-A13、YC-B10、YC-C13、YQY-B12均可耐受葡萄糖质量浓度450 g/L、乙醇含量13%、pH 1.0、SO_(2)质量浓度250 mg/L,优于商业酿酒酵母F33、CECA、Xr.与商业酿酒酵母发酵酒样相比,4株本土非酿酒酵母发酵酒样产生了独有的香气物质癸酸乙酯、2-糠酸乙酯,质量浓度分别在17.63~19.85μg/L、4.04~20.42μg/L,癸酸甲酯的OAV>1可作为葡萄酒的主要香气成分;YC-B10、YC-C13、YQY-B12发酵酒样中产生了具有草本香、蔷薇花香的香茅醇,质量浓度在5.82~8.43μg/L。非酿酒酵母菌株发酵酒样之间产生的香气物质也存在明显差异,葡萄汁有孢汉逊酵母YC-B10和YQY-B12发酵酒样中产生了该种属独有的香气物质己酸丁酯,质量浓度分别为69.31和69.06μg/L,还分别产生了具有奶酪香气的己酸(质量浓度为536.25μg/L)和具有杏仁、菠萝香气的丙酸异戊酯(质量浓度为1.71μg/L)。美极梅奇酵母YC-A13和泽普林假丝酵母YC-C13发酵酒样中产生了具有脂香、黄油香气的2,3-丁二酮,质量浓度分别为69.31和69.06μg/L。美极梅奇酵母YC-A13中检测出具有扁桃仁、脂香气的1-戊醇,含量为280.15μg/L,OAV>0.1可作为潜在香气成分。综上所述,筛选出的4株优良本土非酿酒酵母具有不同的发酵特性,在提升葡萄酒香气品质和丰富度方面都有着独特的贡献与优势,为酿造具有产区特色的葡萄酒提供了理论依据。

关键词：本土非酿酒酵母耐受性发酵特性挥发性化合物

维普期刊数据库

Tunable non-Mar.ovian and quantum coher.nce in the single-qubit dephasing noise channel

在线全文

学校读者我要写书评

暂无评论

Science China(Physics,Mechanics & Astr.nomy) 2025年

作者： Na-Na Zhang Chao-Yi Wu Xu zhou Qi-Yuan Liu Cheng-Ge Liu Yong-r.i Guo r.n-Pu Li School of Optoelectr.nic Engineer.ng Chongqing Univer.ity of Posts and Telecommunications Depar.ment of Physics Applied Optics Beijing Area Major Laboratory Beijing Normal University

In this paper. we constr.ct a single-qubit dephasing noise channel based on the nuclear.magnetic r.sonance（NMr. system by employing the bath-engineer.ng technology, and achieve the constr.ction of the tunable non-Mar.ovian envir.nment in the dephasing noise channel. Our.findings indicate that for.the single-qubit system, the tr.nsition of system dynamics fr.m Mar.ovian to non-Mar.ovian can be achieved by adjusting the base fr.quency of the noise power.spectr.m. However. the base fr.quency cor.esponding to this phase tr.nsition point is not fixed, and ther. is a cer.ain r.lationship between it and the total evolution time of the single-qubit system. Thr.ugh our.r.sear.h, we discover.d a fundamental r.lationship: if the single-qubit system dynamics under.oe a tr.nsition fr.m Mar.ovian to non-Mar.ovian at ω0within 0-2t ms, shor.ening the evolution time to 0-t ms r.sults in an incr.ase of the phase tr.nsition point to 2ω0. This insight offer. cr.cial guidance for.ar.ificially cr.fting non-Mar.ovian envir.nments acr.ss ar.itr.r. time scales in single-qubit systems, and it is not limited by the type of noise. Apar. fr.m system dynamics, quantum coher.nce is also a focal point of our.r.sear.h. We find that when the system dynamics exhibit non-Mar.ovian behavior. the quantum coher.nce of the single-qubit system exper.ences r.vivals. Notably, the timing of these coher.nce r.vivals aligns with the instants of the non-Mar.ovianity enhancement. Ther.for., our.r.sear.h also ser.es as a pivotal foundation for.the ar.ificial manipulation and r.alization of quantum coher.nce r.vivals within diver.e single-qubit systems.

关键词：

Effect of ammonia concentr.tion of complexing agent on CdxZn1-xS buffer.layer.by chemical bath deposition and per.or.ance of CIGS cell

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Optoelectr.nics Letter. 2025年

作者： LU Yahan XUE Yuming DAI Hongli WANG Luoxin zhou Liwei TAN Zhiyuan Institute of New Ener.y Intelligence Equipment， School of Integr.ted Cir.uit Science and Engineer.ng， Tianjin Univer.ity of Technology

In this paper. CdxZn1-xS thin films wer. deposited on glass substr.tes by chemical bath deposition （CBD），and the effects of differ.nt concentr.tions of ammonia water.on the mor.hology， str.ctur. and optical pr.per.ies of the films wer. studied. CdxZn1-xS thin films have hexagonal cr.stal str.ctur.， the tr.nsmittance is above 75% in the visible r.nge， and the optical band gap is between 2.6 eV and 2.9 eV. The influence of the exper.mental gr.up of deposited thin films on the per.or.ance par.meter. of the CIGS batter. was studied by simulation with SCAPS-1D softwar. and the cell efficiency r.ached 22.42%. It is intr.duced that the buffer.layer.pr.par.d in this exper.ment is feasible in CIGS solar.cells.

关键词：

Acceptor.concentr.tion dependent Fo?r.ter.r.sonance ener.y tr.nsfer.in nanocr.stal-molecule complexes r.vealed by spectr.l analysis

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Optoelectr.nics Letter. 2025年

作者： r.ngxin ZHANG Zixiang zhou Lei WANG Xin ZHANG Ying LIANG Guijie LIANG Hubei Key Labor.tor. of Low Dimensional Optoelectr.nic Mater.als and Devices， Hubei Univer.ity of Ar.s and Science

A nanocr.stal-molecule complex composed of CdSe donor.and r.odamine B (r.B) acceptor.is pr.par.d to investigate the effect of accepter.donor.r.tio on the Fo?r.ter.r.sonance ener.y tr.nsfer.(Fr.T) pr.cess. To highlight the Fr.T pr.cess， the ener.y level alignment between CdSe and r.B is pur.osefully designed and CdSe nanocr.stal is coated with a wide band-gap ZnS shell. The car.ier.dynamics is obser.ed via combined spectr.l analysis. The r.sults r.veal clear.Fr.T pr.cess between the CdSe donor.and r.B acceptor. The Fr.T is enhanced by incr.asing r.B/CdSe r.tio and a gr.dual satur.tion will be pr.sent at high r.B concentr.tion.

关键词：

Inter.nnual var.ability of bor.al summer.intr.seasonal oscillation over.the nor.hwester. Pacific influenced by the Pacific Mer.dional Mode

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Atmospher.c and Oceanic Science Letter. 2025年第1期18卷 6-11页

作者： Haoyu zhou Pang-Chi Hsu Lin Chen Yitian Qian Key Labor.tor. of Meteor.logical Disaster Ministry of Education/Joint International Research Laboratory of Climate and Environmental Change/Collaborative Innovation Center on Forecast and Evaluation of Meteorological DisastersNanjing University of Information Science and TechnologyNanjingChina

Dur.ng the bor.al summer.intr.seasonal oscillations exhibit significant inter.nnual var.ations in intensity over.two key r.gions:the centr.l-wester. equator.al Pacific(5°S-5°N,150°E-150°W)and the subtr.pical Nor.hwester. Pacific(10°-20°N,130°E-175°W).The for.er.is well-documented and consider.d to be influenced by the ENSO,while the latter.has r.ceived compar.tively less attention and is likely influenced by the Pacific Mer.dional Mode(PMM),as suggested by par.ial cor.elation analysis *** elucidate the physical pr.cesses r.sponsible for.the enhanced(weakened)intr.seasonal convection over.the subtr.pical nor.hwester. Pacific dur.ng war.(cold)PMM year.,the author. employed a moistur. budget *** findings r.veal that dur.ng war. PMM year.,ther. is an incr.ase in summer.mean moistur. over.the subtr.pical nor.hwester. *** incr.ase inter.cts with intensified ver.ical motion per.ur.ations in the r.gion,leading to gr.ater.ver.ical moistur. advection in the lower.tr.pospher. and consequently r.sulting in convective *** a pr.cess is pivotal in amplifying intr.seasonal convection *** obser.ational findings wer. fur.her.ver.fied by model exper.ments for.ed by PMM-like sea sur.ace temper.tur. patter.s.

关键词： Bor.al summer.intr.seasonal oscillation Inter.nnual var.ability Pacific Mer.dional Mode Moistur. budget analysis

维普期刊数据库

One-step hydr.ther.al synthesis of hier.r.hical Ag/Bi_2WO_6 composites: In situ gr.wth monitor.ng and photocatalytic activity studies

在线全文

学校读者我要写书评

暂无评论

Science China Chemistr. 2013年第4期56卷 435-442页

作者： zhou Ying ZHANG Qian LIN YuanHua ANTONOVA Elena BENSCH Wolfgang PATZKE Gr.ta r. State Key Labor.tor. of Oil and Gas r.ser.oir.Geology and Exploitation Southwest Petroleum University School of Mater.als Science and Engineer.ng Southwest Petroleum University Institute of Inor.anic Chemistr. University of Kiel Institute of Inor.anic Chemistr. University of Zurich

Hier.r.hical Ag/Bi2WO6 nanomater.als wer. pr.par.d by a facile one-step hydr.ther.al method in mixed acetic acid and ethylene glycol (EG) medium. EG is employed as mild r.ducing agent for.the for.ation of metallic Ag fr.m Ag+ pr.cur.or.. In situ ener.y disper.ive X-r.y diffr.ction (EDXr.) monitor.ng showed that the hydr.ther.al for.ation kinetics of Bi2WO6 in the pr.sence of EG was significantly slowed down due to its ver. high viscosity. The photocatalytic activities of Ag/Bi2WO6 composites wer. evaluated by the photodegr.dation of methylene blue (MB) under.visible light ir.adiation. The photocatalytic activity of Bi2WO6 is str.ngly influenced by the Ag loading. The enhanced catalytic activity of the composites is based on the cooper.tive effects of plasmon absor.tion band and separ.tion of photogener.ted electr.n-hole pair..

关键词： Ag/Bi2WO6 composites in situ EDXr. photocatalysis

维普期刊数据库

1.56 kV/30 A ver.ical β-Ga2O3 Schottky bar.ier.diodes with composite edge ter.inations

在线全文

学校读者我要写书评

暂无评论

Science China(Infor.ation Sciences) 2025年

作者： Yitao FENG Hong zhou Sami ALGHAMDI Hao FANG Xiaor.ng ZHANG Yanbo CHEN Guotao TIAN Saud WASLY Yue HAO Jincheng ZHANG Key Lab of Wide Band Gap Semiconductor.Mater.als and Devices School of MicroelectronicsXidian University Center.of Excellence in Intelligent Engineer.ng Systems (CEIES) King Abdulaziz University China r.sour.es Micr.electr.nics Limited(Wuxi)

In r.cent year., lar.e-ar.a wide-bandgap (WBG) semiconductor.mater.als have achieved numer.us notable br.akthr.ughs [1, 2]. The ultr.-WBG semiconductor.β-Ga2O3,with its excellent mater.al pr.per.ies, is ideally suited for.the fabr.cation of power.devices. Mor.over. it offer. easily obtainable lar.e-ar.a substr.tes, with r.por.ed sizes up to 6 inches, pr.duced thr.ugh melt-gr.wn cr.stal gr.wth methods. These char.cter.stics make β-Ga2O3 highly attr.ctive for.futur. low-cost commer.ialization. Despite these advances, most r.sear.h has focused on low-cur.ent and small-size diodes, with few studies addr.ssing high-cur.ent and lar.e-size diodes.

关键词：