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Study on the atmospheric photochemical reaction of CF_3.radicals using ultraviolet photoelectron and photoionization mass spectrometer

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Science china chemistry 2008年第4期51卷 316-321页

作者： yao li1,2. du lin1,2. YIN Shi1,2.& ge {2. 1 beijing national laboratory for molecular sciences (BNLMS), state key laboratory for structural chemistry of unstable and stable species, institute of chemistry, Chinese Academy of sciences,{13.,{{12. 2.Graduate University of Chinese Academy of sciences,{13.,{{12. 1. beijing national {2. for {3. sciences (BNLMS) State Key Laboratory for Structural Chemistry of Unstable and Stable Species Institute of Chemistry Chinese Academy of Sciences Beijing 100080 China 2. Graduate University of Chinese Academy of sciences Beijing 100080 China

A study of the atmospheric photochemical reaction of CF3.radical with CO and O2.was performed by using a homemade ultraviolet photoelectron spectrometer-photoionization mass spectrometer (PES- PIMS). The electronic structures and mechanism of ionization and dissociation of CF3.C(O)OOC(O)- OCF3.were investigated. It was indicated that the two bands on the photoelectron spectrum of CF3.C(O)OOC(O)OCF3.are the result of ionization of an electron from a lone pair of oxygen and a fluo- rine lone pair of CF3.group. The outermost electrons reside in the oxygen lone pair. The experimental and theoretical first vertical ionization energy is 13.2. and 13.178 eV, respectively, with the PES and OVGF method. They are in good agreement. The photo ionization and dissociation processes were discussed with the help of theoretical calculations and PES-PIMS experiment. After ionization, the parent ions prefer the dissociation of the C-O bond and giving the fragments CF3.CO+ and CF3.. It demonstrated that the ultraviolet photoelectron and photoionization mass spectrometer could be ap- plied widely in the study of atmospheric photochemical reaction.

关键词： photochemical reaction CF3 radical ultraviolet photoelectron and photoionization mass spectroscopy transient species

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Electronic Structure Study of three 2.5-disubstituted thiophenes

Electronic Structure Study of three 2,5-disubstituted thioph...

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中国化学会第五届全国结构化学学术会议

作者： Chunping Ma li yao maofa ge Dianxun Wang {3. {2. laboratory for molecular Science (BNLMS),state key laboratory for structural chemistry of unstable and {{13. species,{12. of chemistry,Chinese Academy of sciences,{3.,100080,china

The electronic structures of three 2.5-disubstituted thiophenes (2.bromo-5-chlorothiophene,2.bromo-5-methylthiophene and 2.bromo-5-nitrothiophene)have been studied by ultraviolet photoelectron spectroscopy(UPS).Combined the empirical arguments and theoretical method,the observed bands were *** analysis of electronic effects of the donor/acceptor substituted groups is essential for the reliable assignment of the observed photoelectron *** highest occupied molecular orbital(HOMO)for each compounds is mainly the ionization of π *** analysis of the natural bond orbital(NBO)second-order interaction energies has also been employed to understand the nature of the intermolecular interactions between the substitutents and the parent *** investigation of π and n orbitals ionization potentials enabled us to describe the correlation between substituent effects and relative reaetivities of the substituted thiophenes.

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Dt1 inhibits SWEET-mediated sucrose transport to regulate photoperiod-dependent seed weight in soybean

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molecular Plant 2024年第3期17卷 496-508页

作者： Xiaoming li Zhonghui Chen Haiyang li {2. Yue Cuirong Tan Hongjie liu Yilong Hu Yuhua Yang Xiani yao {2.gping Kong Xiang Huangi Bin Yu Chunyu Zhang Yuefeng Guan Baohui liu Fanjiang Kong Xingliang Hou Guangdong Provincial key laboratory of App{2.ed Botany&{3. key laboratory of Plant Diversity and Specialty Crops South China Botanical GardenChinese Academyof SciencesGuangzhou510650China Guangdong Provincial key laboratory of Plant Adaptation and {2. Design Guangzhou Key Laboratory of Crop Gene EditingInnovative Center of Molecular Genetics and EvolutionSchool of Life SciencesGuangzhou UniversityGuangzhou 510006China University of Chinese Academy of sciences Beijing 100049China College of Agronomy and Biotechnology China Agricultural UniversityBeijing 100193China

Soybean is a photoperiod-sensitive short-day crop whose reproductive period and yield are markedly affected by day-length *** weight is one of the key traits determining the soybean yield;how-ever,the prominent genes that control the final seed weight of soybean and the mechanisms underlying the photoperiod's effect on this trait remain poorly *** this study,we identify SwW19 as a major locus controlling soybean seed weight by QTL mapping and determine Dt1,an orthologous gene of Arabidopsis TFL1 that is known to govern the soybean growth habit,as the causal gene of the SW19 *** showed that Dt1 is highly expressed in developing seeds and regulates photoperiod-dependent seed weight in *** analyses revealed that the Dt1 protein physically interacts with the sucrose transporter GmSWEET10a to negatively regulate the import of sucrose from seed coat to the embryo,thus modulating seed weight under long ***,Dt1 does not function in seed development under short days due to its very low ***,we discovered a novel natural alle{2.c variant of Dt1(H4 haplotype)that decouples its pleiotropic effects on seed size and growth habit;i.e.,this variant remains functional in seed development but fails to regulate the stem growth habit of ***,our findings provide new insights into how soybean seed development responds to photoperiod at different latitudes,offering an ideal genetic component for improving soybean's yield by manipulating its seed weightandgrowth habit.

关键词： soybean seed weight photoperiod dt1 sucrose transport

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Experimental investigation of incremental reactivity of di-tert-butyl peroxide

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Chinese Science Bulletin 2007年第12期52卷 1629-1634页

作者： du lin XU YongFu ge maofa JIA Long {{3. li beijing national {2. for {3. sciences (BNLMS) State Key Laboratory for Structural Chemistry of Unstable and Stable Species Institute of Chemistry Chinese Academy of Sciences Beijing 100080 China state key {2. of Atmospheric Boundary Layer Physics and Atmospheric {3. Institute of Atmospheric Physics Chinese Academy of Sciences Beijing 100029 China Graduate University of the Chinese Academy of sciences Beijing 100039 China Research Center for Atmospheric Environment Beijing Normal University Beijing 100875 China

Large quantities of di-tert-butyl peroxide (DTBP) have been emitted into the troposphere due to human activities. Its role in the atmospheric photochemical reaction has not been understood. This study presents the results of the photochemical reactions of DTBP and NOx, which have been simulated in a self-made smog chamber under the temperature of (2.±1)℃. Both the wall decays of ozone and NO2.could be neglected, compared to the results in simulative experiments. The effective intensity of UV {3.ght used in the experiments was 1.2.×10-3.s-1, which was expressed by the rate constant of NO2.photolysis in purified air. The reaction mechanism was proposed according to our results and reports of other researchers. The maximum values of incremental reactivity (IR) in the three simulative ex- periments were 9.53.10-2. 5.2.×10-2.and 3.78×10-2. respectively. The incremental reactivity decreased with the increase of initial concentrations of DTBP. The IR value of DTBP obtained in this study was comparable to that of acetylene reported in our previous research.

关键词：双特丁基过氧化物烟雾室光化反应光化烟雾大气化学

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Expression and Characterization of Rice Putative PAUSED gene

Expression and Characterization of Rice Putative PAUSED Gene

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2.08年全国生物化学与分子生物学学术大会

作者： Cheng-guo yao~(1,3. liang-fa ge~(2.3. Bo-tao Zhao~(1,3. Chao-qun li Kang-cheng Ruan~(1,3. Hong-xuan lin~(2.3. You-xin Jin~(1,3. 1 state key laboratory of {2. Biology.institute of Biochemistry and Cell Biology,Shanghai 2.003.,{13. 2.national key laboratory of Plant {2. genetics,institute of Plant Physiology and Ecology,Shanghai 2.003.2}{13. 3.Intitutes for Biological {23.,Chinese Academy of {23.,Shanghai 2.003.,{13.

in Arabidopsis,PAUSED (PSD) encodes the ortholog of loslp/exportin-t (XPOT),which mediates the nuclear export oftRNA in yeast and *** monocot plant such as rice,the knowledge of the correspond- ing ortholog,however,is...

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Photoelectron Spectroscopy, Photoionization Mass Spectroscopy, and Theoretical Study on CCl3.SCN

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Chinese Journal of Chemical Physics 2008年第2期21卷 93-98页

作者： lin du li {{3. Mao-fa ge beijing national {2. for {3. sciences State Key Laboratory for Structural Chemistry of Unstable and Stable Species Institute of Chemistry Chinese Academy of Sciences Beijing 100080 China Graduate School of Chinese Academy of sciences Beijing 100039 China

Trichloromethanesulfenyl thiocyanate, CCl3.SCN, was generated and studied by photoelectron spectroscopy （PES）, photoionization mass spectroscopy （PIMS）, and theoretical calculations. This molecule exhibits a gauche conformation, and the torsional angle around S-S bond is 91.4° due to the sulfur-sulfur lone pair interactions. After ionization, the ground-state cationic-radical form of CCl3.SCN＋ adopts a trans planar main-atom structure with Cs symmetry. The highest occupied molecular orbital （HOMO） of CC13.SCN corresponds to the electrons mainly loca{{3.zed on the sulfur 3. lone pair MO. The first ionization energy is determined to be 10.40 cV.

关键词： Photoelectron spectroscopy Photoionization mass spectroscopy Electronic structure

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Anthropogenic Effects on Biogenic Secondary Organic Aerosol Formation

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Advances in Atmospheric sciences 2021年第7期38卷 1053-1084页

作者： li XU lin du Narcisse T.TSONA {{3. ge Environment Research institute Shandong UniversityQingdao 266237China state key {2. for {3. chemistry of unstable and stable species Chinese Academy of Sciences Research/Education Center for Excellence in Molecular SciencesInstitute of ChemistryChinese Academy of SciencesBeijing 100190China

Anthropogenic emissions alter biogenic secondary organic aerosol(SOA)formation from naturally emitted volatileorganic compounds(BVOCs).We review the major laboratory and field findings with regard to effects of anthropogenicpollutants(NO_(x),anthropogenic aerosols,SO_(2.,NH_(3.)on biogenic SOA ***_(x) participate in BVOC oxidationthrough changing the radical chemistry and oxidation capacity,leading to a complex SOA composition and yield sensitivitytowards NO_(x) level for different or even specific hydrocarbon *** aerosols act as an importantintermedium for gas-particle partitioning and particle-phase reactions,processes of which are influenced by the particlephase {2.,acidity,water content and thus associated with biogenic SOA mass ***_(2.modifies biogenic SOAformation mainly through sulfuric acid formation and accompanies new particle formation and acid-catalyzedheterogeneous *** new SO_(2.-involved mechanisms for organosulfate formation have also been ***_(3./amines,as the most prevalent base species in the atmosphere,influence biogenic SOA composition and modify theoptical properties of *** response of SOA formation behavior to these anthropogenic pollutants varies amongdifferent BVOCs *** on anthropogenic-biogenic interactions in some areas of china that aresimultaneously influenced by anthropogenic and biogenic emissions are *** on this review,somerecommendations are made for a more accurate assessment of controllable biogenic SOA formation and its contribution tothe total SOA *** study also highlights the importance of controlling anthropogenic pollutant emissions witheffective pollutant mitigation policies to reduce regional and global biogenic SOA formation.

关键词： biogenic volatile organic compounds anthropogenic pollutants secondary organic aerosol anthropogenic-biogenic interactions china

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Toxicological Effects of Secondary Air Pollutants

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Chemical Research in Chinese Universities 2023年第3期39卷 326-341页

作者： XIANG Wang WANG Weigang du libo ZHAO Bin liU Xingyang ZHANG Xiaojie {{3. li ge maofa state key {2. for {3. chemistry of unstable and stable species Beijing National Laboratory for Molecular SciencesCAS Research/Education Center for Excellence in Molecular SciencesInstitute of ChemistryChinese Academy of SciencesBeijing 100190P.R.China University of Chinese Academy of sciences Beijing 100049P.R.China College of chemistry and Material Science Hebei Normal UniversityShijiazhuang 050024P.R.China

Secondary air pollutants,originating from gaseous pollutants and primary particulate matter emitted by natural sources and human activities,undergo complex atmospheric chemical reactions and multiphase *** gaseous pollutants represented by ozone and secondary particulate matter,including sulfates,nitrates,ammonium salts,and secondary organic aerosols,are formed in the atmosphere,affecting air quality and human *** paper summarizes the formation pathways and mechanisms of important atmospheric secondary ***,different secondary pollutants’toxicological effects and corresponding health risks are *** have shown that secondary pollutants are generally more toxic than primary ***,due to their diverse source and complex generation mechanism,the study of the toxicological effects of secondary pollutants is still in its early ***,this paper first introduces the formation mechanism of secondary gaseous pollutants and focuses mainly on ozone’s toxicological *** terms of particulate matter,secondary inorganic and organic particulate matters are summarized separately,then the contribution and toxicological effects of secondary components formed from primary carbonaceous aerosols are ***,secondary pollutants generated in the indoor environment are briefly ***,a comprehensive review of secondary air pollutants may shed light on the future toxicological and health effects research of secondary air pollutants.

关键词： Secondary pollutant Atmosphere Toxicological effect Public health Particulate matter

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A novel heterogeneous reaction for generating gaseous nitrous acid

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Chinese Science Bulletin 2007年第22期52卷 3056-3060页

作者： WANG WeiGang ge maofa yao {2. ZENG XiaoQing WANG ZiFa beijing national {2. for {3. sciences and State Key Laboratory for Structural Chemistry of Unstable and Stable Species Institute of Chemistry Chinese Academy of Sciences Beijing 100080 China state key {2. of Atmospheric Boundary Layer Physics and Atmospheric {3. Institute of Atmospheric Physics Chi- nese Academy of Sciences Beijing 100029 China

The short-lived reactive specimen nitrous acid HONO was generated in the gas phase by the hetero-geneous reaction of gaseous HCl with AgNO2.which can generate higher concentration of HONO than other methods. We investigated the process from generation to dissociation in the gas phase under different controlled temperatures,and discussed the ionization and reaction on the solid surface by combination of the photoelectron spectroscopy and photoionization mass spectroscopy(PES-PIMS) and in situ diffuse reflectance infrared Fourier transform spectroscopy(DRIFTS) .

关键词：亚硝酸气体网络技术异构性化学结构

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Sources of ambient non-methane hydrocarbon compounds and their impacts on O_(3. formation during autumn,beijing

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Journal of Environmental sciences 2022年第4期34卷 85-97页

作者： Fangjie li Shengrui Tong Chenhui Jia Xinran Zhang Deng lin Wenqian Zhang Weiran li lili Wang maofa ge lixin Xia College of chemistry Liaoning UniversityShenyang 110036China state key {2. for {3. chemistry of unstable and stable species Institute of ChemistryChinese Academy of SciencesBeijing 100190China Center for Excellence in Regional Atmospheric Environment Institute of Urban EnvironmentChinese Academy of SciencesXiamen 361021China University of Chinese Academy of sciences Beijing 100049China key laboratory of Oasis Ecology College of Resource and Environment SciencesXinjiang UniversityUrumqi 830046China state key {2. of Atmospheric Boundary Layer Physics and Atmospheric {3.(LAPC) Institute of Atmospheric Physics(IAP)Chinese Academy of SciencesBeijing 100029China Department of Chemical and Environmental Engineering Yingkou Institute of TechnologyYingkou 115014China

The field observation of 54 non-methane hydrocarbon compounds(NMHCs)was conducted from September 1 to October 2. in 2.2. during autumn in Haidian District,*** mean concentration of total NMHCs was 2..81±11.3. ppbv during this period,and alkanes were the major *** were typical festival effects of NMHCs with lower concentration during the national *** and aromatics were the dominant groups in ozone formation potential(OFP)and OH radical loss rate(L_(OH)).The positive matrix factorization(PMF)running results revealed that vehicular exhaust became the biggest source in urban areas,followed by liquefied petroleum gas(LPG)usage,solvent usage,and fuel *** box model coupled with master chemical mechanism(MCM)was applied to study the impacts of different NMHCs sources on ozone(O_(3.)formation in an O_(3.*** simulation results indicated that reducing NMHCs concentration could effectively suppress O_(3.***,reducing traffic-related emissions of NMHCs was an effective way to control O_(3.pollution at an urban site in {13..

关键词： Non-methane hydrocarbon compounds Festival effects Ozone Source apportionment Master chemical mechanism

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