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| 1 | A single SNP in NRT1.1B has a major impact on nitrogen use efficiency in rice显示文摘Nitrogen(N)is one of the most important nutrients for plants.Its availability is a major limiting factor in crop productivity and yield.Since the'green revolution'in the middle of the 20th century,the amount of N fertilizer used in agriculture has risen dramatically worldwide,resulting in a significant reduction of nitrogen use efficiency(NUE)and serious economic,environmental,and public health con- | DUAN DongDong ZHANG HanMa | 2015 | Science China(Life Sciences)2015，58，8： | 11 |
| 2 | Highly efficient hybrid warm white organic light-emitting diodes using a blue thermally activated delayed fluorescence emitter: exploiting the external heavy-atom effect显示文摘To attain high efficiencies in hybrid white organic light-emitting diodes(WOLEDs),mutual quenching of the fluorophors and phosphors should be minimized.Efforts have been devoted to reducing the triplet quenching of phosphors;however,the quenching of fluorophors by the external heavy-atom effect(EHA)introduced by the phosphors is often ignored.Here,we observed that conventional fluorophors and fluorophors with thermally activated delayed fluorescence(TADF)behave differently in the presence of EHA perturbers.The efficiencies of the conventional fluorophors suffer greatly from the EHA,whereas the TADF fluorophors exhibit negligible changes,which makes TADF materials ideal fluorophors for hybrid devices.WOLEDs using a blue TADF fluorophor and an orange phosphor achieve a maximum forward viewing external quantum efficiency of 19.6%and a maximum forward viewing power efficiency of 50.2 lm W^(-1),among the best values for hybrid WOLEDs.This report is the first time that the EHA effect has been considered in hybrid WOLEDs and that a general strategy toward highly efficient hybrid WOLEDs with simple structures is proposed. | Dongdong Zhang Lian Duan Yunge Zhang Minghan Cai Deqiang Zhang Yong Qiu | 2015 | Light(Science & Applications)2015，4，1： | 6 |
| 3 | Simultaneous enhancement of efficiency and stability of OLEDs with thermally activated delayed fluorescence materials by modifying carbazoles with peripheral groups显示文摘Albeit their high efficiencies, the operational stability of the organic light emitting diodes(OLEDs) based on thermally activated delayed fluorescence(TADF) emitters is still far from satisfaction, and few strategies have been proposed to improve their stability. Here, we show that by modifying the carbazole unit, one of the most commonly used donors in TADF emitters, with peripheral groups, both the device efficiency and operational stability can be greatly improved. Awell-known TADF molecule—4,5-di(9H-carbazol-9-yl)phthalonitrile(2CzPN) was chosen as the prototype and modified by introducing peripheral tert-butyl and phenyl groups to the 3,6-positions of the carbazole(named 2tBuCzPN and 2PhCzPN, respectively). The introduced groups not only improve the compounds' electrochemical stabilities referred to the cyclic voltammetry multi-sweep results, but also promote their photoluminescence quantum yields. Furthermore, reduced singlet-triplet energy gaps are observed, leading to the shortened exciton lifetimes which are benefit to suppress the exciton annihilations. Besides, the steric hindrance of introduced phenyl groups can partly restrain the concentration quenching of the TADF emitter. Consequently, OLEDs based on 2tBuCzPN and 2PhCzPN achieved improved maximum external quantum efficiencies(EQEs) of 17.0% and 14.0%, respectively(compared to 8.5% for 2CzPN). Meanwhile, 2PhCzPN based OLED showed reduced roll-off characteristics and a longer lifetime of 7.8 times higher than that of 2CzPN, testifying the effectiveness of subtle modification of the unstable moieties in simultaneous enhancement of efficiency and stability of OLEDs based on TADF emitters. | Yunge Zhang Dongdong Zhang Taiju Tsuboi Yong Qiu Lian Duan | 2019 | Science China Chemistry2019，62，3： | 3 |
| 4 | A Model-Embedded Trend Test with Incorporating Hardy-Weinberg Equilibrium Information显示文摘The genetic models are greatly important in the analysis of genetic epidemiologic studies and many of the studies are conducted using the trend test under the additive model. However, for many complex diseases and traits, the underlying genetic model for a genetic locus is usually uncertain. So a robust test free of genetic model is appropriate. In this paper, the authors propose a model-embedded trend test by incorporating Hardy-Weinberg equilibrium information and obtain the explicit formula to calculate its statistical significance. Extensive simulation studies show the proposed test is more robust than the existing procedures. Finally, a real application is further analyzed to show the performance of the proposed test. | HU Xiaonan DUAN Xiaogang PAN Dongdong ZHANG Sanguo LI Qizhai | 2017 | Journal of Systems Science & Complexity2017，30，1： | 3 |
| 5 | Efficient red phosphorescent OLEDs based on the energy transfer from interface exciplex: the critical role of constituting molecules显示文摘A novel acceptor material,9-(4′-(4,6-diphenyl-1,3,5-triazin-2-yl)-[1,1′-biphenyl]-3-yl)-9H-carbazole(o-DTPPC)was developed to form interface exciplex with commonly used donors,to maximize the performances of red phosphorescent organic light emitting diodes(PHOLEDs).It is found that the exciplex involving 4,4′-(cyclohexane-1,1-diyl)bis(N,N-di-p-tolylaniline)(TAPC)exhibits the most significant thermally activated delayed fluorescence(TADF)property,derived from the high triplet energy level as well as strong hole-transporting ability of TAPC.Intriguingly,it is the same donor-acceptor combination which achieved the highest device efficiency when adopted as the host for red PHOLEDs.Maximum efficiencies as high as31.36 cd A^(-1),17.95 lm W^(-1),and 21.01%for the current efficiency,power efficiency and external quantum efficiency,respectively with low efficiency roll-off were realized.The improved performance can be attributed to the efficient TADF properties of the interface exciplex-forming host constituting TAPC,benefiting the F?rster energy transfer.The article first underlines the importance of the constituting molecules in the interface exciplex-forming hosts,shedding new insight about the choice of interface exciplex as the host for PHOLEDs,which may lead to even higher performances,paving their ways towards practical applications. | Xiaozeng Song Dongdong Zhang Tianyu Huang Minghan Cai Lian Duan | 2018 | Science China Chemistry2018，61，7： | 3 |
| 6 | Red phosphorescent organic light-emitting diodes based on a novel host material with thermally activated delayed fluorescent properties显示文摘High cost of phosphors and significant efficiency roll-off at high brightness are the two main factors that limit the wide application of phosphorescent organic light-emitting diodes (PHOLEDs). Efforts have been paid to find ways to reduce the phosphors’ concentration and efficiency roll-off of PHOLEDs. In this work, we reported red emission PHOLEDs with low dopant concentration and low efficiency roll-off based on a novel host material 2,4-biscyanophenyl-6-(12-phenylindole[2,3-a]carbazole-11-yl)-1,3,5-triazine (BCPICT), with thermally activated delayed fluorescent(TADF) properties. The device with 1.0% dopant concentration displayed a maximum external quantum efficiency of 10.7%.When the dopant concentration was increased to 2.0%, the device displayed a maximum external quantum efficiency of 10.5% and a low efficiency roll-off of 5.7% at 1000 cd/m2. | Yilang Li Dongdong Zhang Yunge Zhang Minghan Cai Lian Duan | 2016 | Science China Chemistry2016，59，6： | 2 |
| 7 | The incubation period of COVID-19: a global meta-analysis of 53 studies and a Chinese observation study of 11 545 patients显示文摘Background:The incubation period is a crucial index of epidemiology in understanding the spread of the emerging Coronavirus disease 2019(COVID-19).In this study,we aimed to describe the incubation period of COVID-19 globally and in the mainland of China.Methods:The searched studies were published from December 1,2019 to May 26,2021 in CNKI,Wanfang,PubMed,and Embase databases.A random-efect model was used to pool the mean incubation period.Meta-regression was used to explore the sources of heterogeneity.Meanwhile,we collected 11545 patients in the mainland of China outside Hubei from January 19,2020 to September 21,2020.The incubation period ftted with the Log-normal model by the coarseDataTools package.Results:A total of 3235 articles were searched,53 of which were included in the meta-analysis.The pooled mean incubation period of COVID-19 was 6.0 days(95%confdence interval[CI]5.6–6.5)globally,6.5 days(95%CI 6.1–6.9)in the mainland of China,and 4.6 days(95%CI 4.1–5.1)outside the mainland of China(P=0.006).The incubation period varied with age(P=0.005).Meanwhile,in 11545 patients,the mean incubation period was 7.1 days(95%CI 7.0–7.2),which was similar to the fnding in our meta-analysis.Conclusions:For COVID-19,the mean incubation period was 6.0 days globally but near 7.0 days in the mainland of China,which will help identify the time of infection and make disease control decisions.Furthermore,attention should also be paid to the region-or age-specifc incubation period. | Cheng Cheng DongDong Zhang Dejian Dang Juan Geng Peiyu Zhu Mingzhu Yuan Ruonan Liang Haiyan Yang Yuefei Jin Jing Xie Shuaiyin Chen Guangcai Duan | 2021 | Infectious Diseases of Poverty2021，10，5： | 1 |
| 8 | Selective C-C bonds formation,N-alkylation and benzo[d]imidazoles synthesis by a recyclable zinc composite显示文摘Earth abundant metals are much less expensive,promising,valuable metals and could be served as catalysts for the borrowing hydrogen reaction,dehydrogenation and heterocycles synthesis,instead of noble metals.The uniformly dispersed zinc composites were designed,synthesized and carefully characterized by means of XPS,EDS,TEM and XRD.The resulting zinc composite showed good catalytic activity for the N-alkylation of amines with amines,ketones with alcohols in water under base-free conditions,while unsaturated carbonyl compounds could also be synthesized by tuning the reaction conditions.Importantly,it was the first time to realize the synthesis of 2-aryl-1H-benzo[d]imidazole derivatives by using this zinc composite under green conditions.Meanwhile,this zinc catalyst could be easily recovered and reused for at least five times. | Guanxin Zhu Zheng-Chao Duan Haiyan Zhu Dongdong Ye Dawei Wang | 2022 | Chinese Chemical Letters2022，33，1： | 1 |
| 9 | High‐Efficiency Fluorescent Organic Light‐Emitting Devices Using Sensitizing Hosts with a Small Singlet–Triplet Exchange Energy显示文摘 | Dongdong Zhang Lian Duan Chen Li Yilang Li Haoyuan Li Deqiang Zhang Yong Qiu | 2014 | Adv Mater2014，，29： | 1 |
| 10 | Towards High Efficiency and Low Roll‐Off Orange Electrophosphorescent Devices by Fine Tuning Singlet and Triplet Energies of Bipolar Hosts Based on Indolocarbazole/1, 3, 5‐Triazine Hybrids显示文摘 | Dongdong Zhang Lian Duan Yilang Li Haoyuan Li Zhengyang Bin Deqiang Zhang Juan Qiao Guifang Dong Liduo Wang Yong Qiu | 2014 | Adv Funct Mater2014，，23： | 1 |
| 11 | Luminescent gold(Ⅲ)exciplexes enable efficient multicolor electroluminescence显示文摘The control of excited states and related emissive properties of gold(Ⅲ)complexes mainly depends on the modulation of intramolecular electronic interactions among gold(Ⅲ)metal center,chelating ligands and/or peripheral groups.However,luminescent gold(Ⅲ)systems based on intermolecular electronic interactions have never been explored.Here we report a series of proof-of-concept gold(Ⅲ)exciplexes using a simple gold(Ⅲ)complex,AuDPPy,as an electron acceptor.The emissive properties of gold(Ⅲ)exciplexes can be regulated by combining AuDPPy with different donors.Inspiringly,these gold(Ⅲ)exciplexes have donor-dependent emission mechanisms:dominant phosphorescence or dual radiative channels of thermally activated delayed fluorescence(TADF)and phosphorescence.Consequently,these gold(Ⅲ)exciplexes deliver green-to-red electroluminescence with external quantum efficiencies(EQEs)of up to 10.1%.More importantly,using these gold(Ⅲ)exciplexes to host multi-resonance TADF emitters results in narrowband yellow,orange,and deep-red electroluminescence with high EQEs of 23.5%,24.4%,and 27.4%,respectively,competitive to the highest values for gold(Ⅲ)OLEDs in similar color gamut. | Lisi Zhan Tianhao Chen Cheng Zhong Xiaosong Cao Yuewei Zhang Yang Zou Zhengyang Bin Jingsong You Dongdong Zhang Lian Duan Chuluo Yang Shaolong Gong | 2023 | Science China Chemistry2023，66，11： | 0 |
| 12 | Normalized fatigue properties of asphalt mixture at various temperatures显示文摘This study normalized the mixture's fatigue behavior at various temperatures,and the strength and fatigue tests of the mixture were conducted.The stress state of the asphalt mixture includes direct tensile,uniaxial compression,and indirect tensile.The Desai yield surface and fatigue path were proposed.And a normalized fatigue characteristics model of the mixture was established.The following conclusions were obtained.With the increases in the loading rate,the strength of the asphalt mixture increased.As the temperature increases,the strength of the mixture is reduced.At various temperatures and rates,the strength forms a closed curved surface.The Desai strength yield surface was established,which forms a closed curved surface.When the loading rate and temperature are below a certain critical line,the asphalt mixture will not undergo strength damage.At a fixed stress state,the fatigue damage path of the mixture was determined.The stress ratio was determined considering the influence of the loading rate.In this way,a normalized model can be described to express the asphalt mixture fatigue properties at various temperatures and stress levels.For the asphalt mixture in an indirect tensile state,the normalized fatigue equation parameter is 4.09.This model is more suitable for reflecting the viscous-elastic behavior of the mixtures than the fatigue equation determined by the notional stress ratio. | Dongdong Ge Zihao Ju Defeng Duan Songtao Lyu Weiwei Lu Chaochao Liu | 2023 | Journal of Road Engineering2023，3，3： | 0 |
| 13 | High-Efficiency Narrow-Band Electro-Fluorescent Devices with Thermally Activated Delayed Fluorescence Sensitizers Combined Through-Bond and Through-Space Charge Transfers显示文摘Organic light-emitting diodes utilizing thermally activated delayed fluorescence sensitizers and multiple-resonance(MR)dopants may simultaneously offer high efficiencies and narrow-band emissions,but these devices still face intractable challenges with a lack of design rules for high-performance sensitizers.Here,sensitizers with ortho-arranged donor–acceptors on a(trifluoromethyl)benzene linker have been proposed,which not only facilitate relatively small molecular dipole moments but also combine through-bond and through-space charge transfers for fast reverse intersystem crossing(RISC). | Chen Yin Dongdong Zhang Yuewei Zhang Yang Lu Rui Wang Guomeng Li Lian Duan | 2020 | CCS Chemistry2020，2，4： | 0 |
| 14 | Constructing the coherent transition interface structure for enhancing strength and ductility of hexagonal boron nitride nanosheets/Al composites显示文摘The deformation incompatibility of components is a bottleneck restricting the exaltation of the strength and ductility of composites.Herein,the coherent transition interface was designed and produced in hexagonal boron nitride nanosheets(BNNSs)/Al composites by reaction sintering route,expecting to re-lieve the deformation incompatibility between BNNSs and Al.It is demonstrated that with the sintering temperature for composites raising from 600℃ to 650℃,700℃ and 750℃,different interface bonding characteristics,which involve nucleation and growth of AlN continuous nanolayer,were confirmed.Fur-thermore,first-principles calculations show that the generation of the coherent transition interface im-proved the interfacial bonding strength of BNNSs/Al composites through covalent bonds.The composites with coherent transition interface exhibit excellent strength-toughness combination in tensile and impact tests.The finite element simulation and in-situ approach under tensile tests were applied to investigate the influence of transition interface structure on deformation behavior of BNNSs/Al composite.It is found that the generation of the transition interface can not only weaken the stress partitioning behavior in the elastic stage,but also constrain the crack initiation and propagation behavior in the elastic-plastic stage and plastic stage,thereby improving the deformation compatibility between BNNSs and Al.The present work provides a novel view into the breakthrough for the trade-offrelationship of strength and ductility by coherent transition interface design in nanocomposites. | Lishi Ma Xiang Zhang Yonghua Duan Siyuan Guo Dongdong Zhao Chunnian He Naiqin Zhao | 2023 | Journal of Materials Science & Technology2023，，14： | 0 |
| 15 | Suppressing Competitive Coordination Reaction for Ohmic Cathode Contact Using Amino-Substituted Organic Ligands and Air-Stable Metals显示文摘Ohmic cathode contact can be formed readily via coordination-activated n-doping(CAN),by co-evaporating air-stable metals(e.g.,silver)and organic ligands with coordination sites.It has been proposed that increasing the nucleophilicity of the main binding site of a ligand is essential for reducing the work function of the doped films. | Yang Lu Ziyang Liu Yuewei Zhang Chen Zhang Jinbei Wei Zhengyang Bin Xuewen Wang Dongdong Zhang Lian Duan | 2021 | CCS Chemistry2021，3，12： | 0 |
| 16 | Highly Efficient and Stable Blue OLEDs Based on B-N Bonds Embedded 6,12-Diphenyl-5,11-dihydroindolo[3,2-b]carbazole with Narrowband Emission and Extended Lifetime显示文摘Emitters with narrowband spectra are of great importance nowadays because of the growing demand for ultra-high-definition displays in the fields of panel displays and solid-state lighting.Though the reported multiple resonance(MR)emitters have been widely studied with extremely sharp spectra and color-tunable emissions,the electrophilic borylation synthetic strategies and stable narrowband blue devices still face great challenges. | Hengyi Dai Jianping Zhou Guoyun Meng Lu Wang Lian Duan Dongdong Zhang | 2023 | Chinese Journal of Chemistry2023，41，6： | 0 |
| 17 | Investigation on two triphenylene based electron transport materials显示文摘Promoting electron mobility is the key to designing high performance electron transport materials(ETMs). Formation of intermolecular interaction can be helpful to enhance their electron mobilities as a result of more ordered molecular stacking.Here, to reveal the inherent influence of intermolecular π-π stacking on the electron mobilities, we designed two ETMs, namely,2,4-diphenyl-6-[3-(2-triphenylenyl)phenyl]-1,3,5-triazine(TPTRZ) and 2,4-diphenyl-6-[4′-(2-triphenylenyl)[1,1′-biphenyl]-3-yl]-1,3,5-triazine(TPPTRZ). Thermal, photophysical and electrochemical measurement results indicate they are good ETM candidates. Additionally, TPTRZ and TPPTRZ exhibit high electron mobilities of 3.60×10^(-5) and 3.58×10^(-5) cm^2V-1 s^(-1), respectively, at an electric field of 7×10~5 V cm^(-1). By taking X-ray single crystal structure, theoretical calculation and time of flight(TOF) results into consideration, it is revealed that strong intermolecular π-π stacking induced by planar triphenylene and triphenyltriazine units renders TPTRZ and TPPTRZ small energetic and positional disorder parameters, and results in their high electron mobilities thereby. By further enhancing intermolecular π-π stacking, ETMs with even higher electron mobilities can thus be anticipated. | Minghan Cai Chongguang Zhao Dongdong Zhang Xiaozeng Song Lian Duan | 2019 | Science China Chemistry2019，62，6： | 0 |
| 18 | VAMP726 from maize and Arabidopsis confers pollen resistance to heat and UV radiation by influencing lignin content of sporopollenin显示文摘Sporopollenin in the pollen cell wall protects male gametophytes from stresses.Phenylpropanoid derivatives,including guaiacyl(G)lignin units,are known to be structural components of sporopollenin,but the exact composition of sporopollenin remains to be fully resolved.We analyzed the phenylpropanoid derivatives in sporopollenin from maize and Arabidopsis by thioacidolysis coupled with nuclear magnetic resonance(NMR)and gas chromatography–mass spectrometry(GC–MS).The NMR and GC–MS results confirmed the presence of p-hydroxyphenyl(H),G,and syringyl(S)lignin units in sporopollenin from maize and Arabidopsis.Strikingly,H units account for the majority of lignin monomers in sporopollenin from these species.We next performed a genome-wide association study to explore the genetic basis of maize sporopollenin composition and identified a vesicle-associated membrane protein(ZmVAMP726)that is strongly associated with lignin monomer composition of maize sporopollenin.Genetic manipulation of VAMP726 affected not only lignin monomer composition in sporopollenin but also pollen resistance to heat and UV radiation in maize and Arabidopsis,indicating that VAMP726 is functionally conserved in monocot and dicot plants.Our work provides new insight into the lignin monomers that serve as structural components of sporopollenin and characterizes VAMP726,which affects sporopollenin composition and stress resistance in pollen. | Wenqi Yang Dongdong Yao Haiyang Duan Junli Zhang Yaling Cai Chen Lan Bing Zhao Yong Mei Yan Zheng Erbing Yang Xiaoduo Lu Xuehai Zhang Jihua Tang Ke Yu Xuebin Zhang | 2023 | Plant Communications2023，4，6： | 0 |
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