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Forging Three Single Bonds on One carbon via Metal carbynes or carbyne Equivalents

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chinese Journal of chemistry 2021年第12期39卷 3481-3484页

作者： Yunhui Yang congyang Wang beijing national laboratory for molecular sciences CAS Key Laboratory of Molecular Recognition and FunctionCAS Research/Education Center for Excellence in Molecular SciencesInstitute of ChemistryChinese Academy of SciencesBeijing 100190China University of chinese Academy of sciences Beijing 100049China

Metal carbyne(M≡c)complexes have been discovered for nearly half a century,however,they gained far less study in comparison with metal-carbon single bond(M—c)and metal carbene(M=c)species in synthetic *** to three sigma bonds are possibly forged on a single carbon through metal carbynes or carbyne equivalents,which holds great potentials in organic synthesis but also requires high efficiency of bond formation and precise control of reactivity and *** this line,two systems based on stoi-chiometric transformations of manganese carbynes and ruthenium/rhodium-catalyzed reactions of diazo hypervalent iodine reagents,carbyne equivalents,have emerged recently,which will be highlighted *** potentials and challenges in this intriguing area are also briefly discussed.

关键词： Transition metals carbyne ligands Manganese Three sigma bonds Stoichiometric/catalytic reactions

Bioinspired molecules design for bilateral synergistic passivation in buried interfaces of planar perovskite solar cells

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Nano Research 2022年第2期15卷 1069-1078页

作者： Bin Wang Junjie Ma Zehua Li Gangshu chen Qiang Gu Shuyao chen Yiqiang Zhang Yanlin Song Jingbo chen Xiaodong Pi Xuegong Yu Deren Yang School of Materials Science and Engineering Henan Institute of Advanced TechnologyZhengzhou UniversityZhengzhou 450001China key laboratory of Green Printing Institute of ChemistryChinese Academy of Sciences100190 BeijingChina State key laboratory of Silicon Materials&School of Materials Science and Engineering Zhejiang UniversityHangzhou 310027China

Trap-mediated energy loss in the buried interface with non-exposed feature constitutes one of the serious challenges for achieving high-performance perovskite solar cells(PScs).Inspired by the adhesion mechanism of mussels,herein,three catechol derivatives with functional Lewis base groups,namely 3,4-Dihydroxyphenylalanine(DOPA),3,4-Dihydroxyphenethylamine(DA)and 3-(3,4-Dihydroxyphenyl)propionic acid(DPPA),were strategically *** molecules as interfacial linkers are incorporated into the buried interface between perovskite and SnO_(2) surface,achieving bilateral synergetic passivation *** crosslinking can produce secondary bonding with the undercoordinated Pb^(2+) and Sn^(4+) *** PScs treated with DOPA exhibited the best performance and operational *** the DOPA passivation,a stabilized power conversion efficiency(PcE)of 21.5%was demonstrated for the planar *** 55 days of room-temperature storage,the unencapsulated devices with the DOPA crosslinker could still maintain 85%of their initial performance in air under relative humidity of-15%.This work opens up a new strategy for passivating the buried interfaces of perovskite photovoltaics and also provides important insights into designing defect passivation agents for other perovskite optoelectronic devices,such as light-emitting diodes,photodetectors,and lasers.

关键词： perovskite solar cells bioinspired bilateral passivation buried interfaces catechol derivatives

A general method for growth of perovskite single-crystal arrays for high performance photodetectors

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Nano Research 2022年第7期15卷 6568-6573页

作者： Shiheng Wang Zhenkun Gu Rudai Zhao Ting Zhang Yunjie Lou Lutong Guo Meng Su Lihong Li Yiqiang Zhang Yanlin Song Green catalysis center and College of ChemistryHenan Institute of Advanced TechnologyZhengzhou UniversityZhengzhou 450051China key laboratory of Green Printing Institute of ChemistryChinese Academy of SciencesBeijing 100190China University of chinese Academy of sciences Beijing 100049China

Perovskite single-crystal arrays have attracted intensive attention because of their great potentials for integrated optoelectronic ***,the traditional top-down lithography strategy requires complex processing and is detrimental to perovskite crystal structures,which is incompatible to directly pattern perovskite single ***,we report a lithography-free method to realize the controllable growth of perovskite single-crystal *** introducing a printed hydrophilic-hydrophobic substrate into the crystallization system,the MAPbcl_(3) single-crystal arrays with precise location and uniform size are effectively *** method can be applied to prepare diverse perovskite single-crystal arrays,including MAPbBr_(3),csPbcl_(3),csPbBr_(3),cs_(3)cu_(2)I_(5),cs_(3)Bi_(2)I_(9),and(BA)_(2)(MA)_(3)Pb_(4)I_(11).The perovskite single crystals can be selectively grown on the electrodes to fabricate ultraviolet *** strategy demonstrates a facile approach to fabricate large-scale perovskite single-crystal arrays and opens a pathway to produce diverse perovskite optoelectronic devices.

关键词： single-crystal arrays lithography-free hydrophilic-hydrophobic substrate ultraviolet(UV)photodetector

Electrochemical synthesis of alkali-intercalated iron selenide superconductors

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chinese Physics B 2015年第11期24卷 488-491页

作者：申士杰应天平王刚金士锋张韩林志萍陈小龙 Research & Development center for Functional crystals Beijing National Laboratory for Condensed Matter PhysicsInstitute of Physics Chinese Academy of Sciences collaborative Innovation center of Quantum Matter

Electrochemical method has been used to insert k/Na into FeSe lattice to prepare alkali-intercalated iron selenides at room temperature. Magnetization measurement reveals that kxFe2Se2 and NaxFe2Se2 are superconductive at 31 k and 46 k, respectively. This is the first successful report of obtaining metal-intercalated FeSe-based high-temperature superconductors using electrochemical method. It provides an effective route to synthesize metal-intercalated layered compounds for new superconductor exploration.

关键词： superconductivity iron-based superconductor electrochemical synthesis intercalation

Organic solar cells based on small molecule donor and polymer acceptor

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chinese chemical Letters 2022年第1期33卷 123-132页

作者： Wanru Xu Yilin chang Xiangwei Zhu Zhenhua Wei Xiaoli Zhang Xiangnan Sun kun Lu Zhixiang Wei college of chemistry Zhengzhou UniversityZhengzhou 450001China cAS key laboratory of Nanosystem and Hierarchical Fabrication CAS Center for Excellence in NanoscienceNational Center for Nanoscience and TechnologyBeijing 100190China University of chinese Academy of sciences Beijing 100049China Shandong First Medical University Shandong Academy of Medical SciencesTaian 271016China School of Material Science and Engineering Zhengzhou UniversityZhengzhou 450001China

Small molecule donor/polymer acceptor(SD/PA)-type organic solar cells(OScs)have attracted widespread attention in recent years due to the continuing power conversion efficiency(PcE)growth,near 10%,and the excellent thermal stability for the practical ***,the development of SD/PA-type OScs lags far behind that of polymer donor/small molecule acceptor(PD/SA)-type OScs,which are also based on the combination of small molecule and polymer,with the PcEs exceeding 18%.The reasons accounting for this great gap are well worth *** this review,we have analyzed the key factors affecting the photovoltaic performances of SD/PA-type OScs,systematically summarized the research progress of SD/PA type OScs in recent years,and put forward our own views on the future development of SD/PA type OScs.

关键词： Organic solar cells Small molecule donor Polymer acceptor Phase separation Thermal stability

A Three-Dimensional Velocity-Map Imaging Setup Designed for crossed Ion-Molecule Scattering Studies

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chinese Journal of chemical Physics 2021年第1期34卷 71-80,I0011页

作者： Guo-dong Zhang Li-chang Guan Zi-feng Yan Min cheng Hong Gao beijing national laboratory for molecular sciences Institute of ChemistryChinese Academy of SciencesBeijing 100190China University of chinese Academy of sciences Beijing 100049China beijing Success Technology co.ltd Beijing 100102China

In this study,we report the design and simulation of an electrostatic ion lens system consisting of 22 round metal *** opening of the extractor plate is covered withmetal mesh,which is for shielding the interaction region of the lens system from the high Dc voltages applied to all other plates than the repeller and extractor *** Simion simulation shows that both velocity-mapping and time focusing can be achieved simultaneously when appropriate voltages are applied to each of the *** makes the ion lens system be able to focus large ionic volumes in all three dimensions,which is an essential requirement for crossed ion-molecule scattering studies.A three-dimensional ion velocity measurement system with multi-hit and potential multi-mass capability is built,which consists of a microchannel plate(McP),a P47 phosphor screen,a cMOS camera,a fast photomultiplier tube(PMT),and a high-speed *** two velocity components perpendicular to the flight axis are measured by the cMOS camera,and the time-of-flight,from which the velocity component along the flight axis can be deduced,is measured by the PMT.A Labview program is written to combine the two measurements for building the full three-dimensional ion velocity in real time on a frame-by-frame *** multi-hit capability comes from the fact that multiple ions from the camera and PMT in the same frame can be correlated with each other based on their various *** demonstrate this by using the photodissociation of cH31 at 304 nm.

关键词： Three-dimensional image Velocity-mapping Time-focusing Ion-molecule scattering Photodissociation

controllable printing of large-scale compact perovskite films for flexible photodetectors

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Nano Research 2022年第2期15卷 1547-1553页

作者： Zhenkun Gu Ying Wang Shiheng Wang Ting Zhang Rudai Zhao Xiaotian Hu Zhandong Huang Meng Su Qun Xu Lihong Li Yiqiang Zhang Yanlin Song Henan Institute of Advanced Technology Green Catalysis Centerand College of ChemistrySchool of Materials Science and EngineeringZhengzhou UniversityZhengzhou 450051China Institute of chemistry Chinese Academy of Sciences(ICCAS)Beijing National Laboratory for Molecular Sciences(BNLMS)Beijing 100190China University of chinese Academy of sciences Beijing 100049China

Perovskite materials are promising candidates for the next generation of wearable ***,due to uncontrolled crystallization and the natural brittle property of crystals,it remains a great challenge to fabricate large-scale compact and tough perovskite *** we report a facile method to print large-scale perovskite films with high quality for flexible *** introducing a soluble polyethylene oxide(PEO)layer during the inkjet printing process,the nucleation and crystal growth of perovskite is well *** films can be easily printed in large scale and patterned in high ***,this method can be extended to various kinds of perovskite materials,such as MAPbb(MA=methylammonium),MA_(3)Sb_(2)l_(9),and(BA)_(2)PbBr_(4)(BA=benzylammonium).The printed perovskite films show high quality and excellent mechanical *** photodetectors based on the MAPbBr3 perovskite films show a responsivity up to -1,036 mAA/V and maintain over 96.8%of the initial photocurrent after 15,000 consecutive bending *** strategy provides a facile approach to prepare large-scale flexible perovskite *** opens up new opportunities for the fabrication of diverse wearable optoelectronic devices.

关键词： inkjet printing perovskite polymer-assisted crystallization flexible photodetectors

Enhancing the performances of all-small-molecule ternary organic solar cells via achieving optimized morphology and 3D charge pathways

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chinese chemical Letters 2021年第9期32卷 2904-2908页

作者： Yanhong chang Jing Li Yilin chang Yixiao Zhang Jianqi Zhang kun Lu Xiangnan Sun Zhixiang Wei Department of Environmental Science and Engineering University of Science and Technology BeijingBeijing 100083China cAS key laboratory of Nanosystem and Hierarchical Fabrication CAS Center for Excellence in NanoscienceNational Center for Nanoscience and TechnologyBeijing 100190China beijing key laboratory of Resource-oriented Treatment of Industrial Pollutants Beijing 100083China University of chinese Academy of sciences Beijing 100049China Shandong First Medical University&Shandong Academy of Medical sciences Taian 271016China School of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450001China

With the emergence of non-fullerene acceptors(NFAs),the power conversion efficiencies(PcEs)of allsmall-molecule organic solar cells(ASM-OScs)have been significantly ***,due to the strong crystallinities of small molecules,it is much more challenging to obtain the ideal phase separation morphology and efficient charge transport pathways for ***,a high-efficiency ternary ASMOSc has been successfully constructed based on H11/IDIc-4 F system by introduction of IDIc with a similar backbone as IDIc-4F but weak ***,the addition of IDIc has effectively suppressed large-scale phase aggregation and optimized the morphology of the blend *** importantly,the molecular orientation has also been significantly adjusted,and a mixed face-on and edge-on orientation has formed,thus establishing a more favorable three-dimensional(3D)charge pathways in the active *** these improvements,the enhanced short-circuit current density(JSc)and fill factor(FF)of the ternary system have been *** addition,because of the high lowest unoccupied molecular orbital(LUMO)energy level of IDIc as well as the alloyed structure of the IDIc and IDIc-4F,the promoted open circuit voltage(VOc)of the ternary system has also been realized.

关键词： All-small-molecule Ternary organic solar cells Alloyed acceptor Morphology optimization 3D charge pathways

Microbial Diversity of Planctomycetes and Related Bacteria in Wetlands with Different Anthropogenic Disturbances

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湿地科学 2013年第2期11卷 158-166页

作者： Yu Wang Guibing Zhu Erwin van der Biezen Mike S M Jetten chengqing Yin State key laboratory of Environmental Aquatic Quality Research Center for Eco-Environmental Sciences Chinese Academy of Sciences chongqing Institute of Green and Intelligent Technology Chinese Academy of Sciences Department of Microbiology Institute for Water and Wetland Research (IWWR) Radboud University Nijmegen

The diversity of Planctomycetes and related bacteria in 3 types of freshwater wetlands with different anthropogenic disturbances were investigated by cloning and sequencing PcR-amplified partial 16S rRNA genes. Three clone libraries were constructed using 16S rRNA-targeted forward PcR primer specific for Planctomycetales and general bacterial reverse primer. Phylogenetic analysis of the 16S rRNA gene sequences defined 95 operational taxonomic units (OTUs) with 163 sequences. The clone libraries covered a wide microbial diversity of Proteobacteria and the Planctomycetes-Verrucomicrobia-chlamydiales (PVc) superphylum. The majority of the OTUs were related to the phylum of Planctomycetes (33 OTUs), Proteobacteria (22 OTUs) and Verrucomicrobia (22 OTUs). Four known genera from the Planctomycetes phylum were all detected. The genus Pirellula (18 OTUs) dominated the Planctomycetes community, but different patterns of distribution were observed in the wetlands. The littoral wetlands of Baiyangdian Lake with the least anthropogenic disturbances covered more species and showed the highest biodiversity. However, the Jiaxing paddy fields with the highest anthropogenic disturbances showed a higher biodiversity than that in the riparian wetlands of the North canal. Bacteria distantly related to anammox bacteria were also detected with a small proportion (4 OTUs). It showed that wetlands hold a great biodiversity of phyla Planctomycetes and related bacteria; furthermore, there is ample opportunity to discover novel phylotypes of Planctomycetes in the wetland ecosystems.

关键词： Planctomycetes biodiversity PVc superphylum anthropogenic disturbances freshwater wetlands