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Aggregation-induced dual-color luminogen with enhanced chiroptical property

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Science China Chemistry 2022年第9期65卷 1679-1680页

作者： wen su Fanglong Yuan CAS Center for Excellence in Nanoscience National Center for Nanoscience and TechnologyBeijing 100190China Department of Physics Chemistryand Biology(IFM)Linkoping UniversityLinkoping 58183Sweden Department of Electrical and Computer Engineering University of TorontoTorontoM5S 2E8 OntarioCanada

Aggregation-induced emission(AIE),which was first proposed by Tang et al.[1]in 2001,describes a photophysical phenomenon that organic molecules can show much stronger light emission in aggregated state than that of si... 详细信息

关键词： state property diluted

Novel Highly Selective Fluorescent Chemosensors for Hg（Ⅱ）

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Chemical Research in Chinese Universities 2013年第4期29卷 657-662页

作者： su wen-qi YANG Bing-qin Key Laboratory of Synthetic and Natural Functional Molecule Chemistry Ministry of Education Department of Chemistry Northwest University Xi'an 710069 P. R. China

Based on Rhodamine,two novel fluorescent Hg2＋ chemosensors（R1,R2） were synthesized from inexpensive starting *** were designed and synthesized with o-aminophenol and o-phenylenediamine derivatives as the Hg2＋ chelator,the comparison between the photophysical properties of two chemosensor molecules was *** chemosensors were designed with a photoinduced electron transfer（PET） *** binding to Hg2＋ which blocks the PET process,the fluorescence intensity of the chemosensors was enhanced by up to *** exhibit very strong fluorescence responses to Hg2＋ and have remarkably higher selectivity for Hg2＋ than for other metal ions including K＋,Na＋,Ca2＋,Mg2＋,Cd2＋,Mn2＋,Ni2＋,Co2＋,Zn2＋,Cu2＋,Cr3＋,Fe3＋,pb2＋,Ag＋,Al3＋,Fe2＋ and Sn2＋ in Tris-HC1/sodium phosphate *** fluorescence enhancement of R2 towards Hg2＋ maintains stable in wide pH span（6.4-8.8） aqueous solutions.

关键词： Fluorescent chemosensor Mercury ion Sensor Rhodamine fluorophore Fluorescence intensity

Geometry of Rectangular Block Triangular Matrices

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Acta Mathematica Sinica,English Series 2009年第12期25卷 2035-2054页

作者： Li Ping HUANG su wen ZOU School of Mathematics and Computing Science Changsha University of Science and Technology Changsha 410076 P. R. China Liuzhou Senior High School Liuzhou 545006 P. R. China

Let D be any division ring, and let T（mi,ni,k） be the set of k × k （k ≥ 2） rectangular block triangular matrices over D. For A, B ∈ T（mi,ni,k）, if rank（A - B） = 1, then A and B are said to be adjacent and denoted by A -B. A map T ： T（mi,ni,k） -〉 T（mi,ni,k） is said to be an adjacency preserving map in both directions if A - B if and only if φ（A） φ（B）. Let G be the transformation group of all adjacency preserving bijections in both directions on T（mi,ni,k）. When m1,nk ≥ 2, we characterize the algebraic structure of G, and obtain the fundamental theorem of rectangular block triangular matrices over D.

关键词： geometry of matrices triangular matrix adjacency preserving maximal set

Tectonic Boundary and Ceasing Time of Amalgamation between the North China Craton and the North Qinling Belt

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Journal of Earth Science 2018年第5期29卷 1074-1080页

作者： Jingbo Liu Neng-Song Chen wen su State Key Laboratory of Lithospheric Evolution Institute of Geology and Geophysics Chinese Academy of Sciences College of Earth and Planetary Sciences University of the Chinese Academy of Sciences School of Earth Sciences Center for Global Tectonics China University of GeosciencesWuhan

The Qinling orogenic belt is a composite orogen, consisting of the north and south Qinling belts with different collision ages. The North Qinling belt is composed of several petro-tectonic units, including the Kuanping, Erlangping, Qinling and Danfeng groups with numerous granitoid plutons from Neoproterzoic to Middle Devonian. To the north of the Kuanping Group, a mylonitized granite body in the Luanchuan Group was determined to have the magmatic age of 850 Ma, which is the northernmost Neoprotozoic granite body. The volcanic rocks of the Dahongkou Formation from the Luanchuan Group had the eruptive age of -1 600 Ma, obtained from zircon U-Pb LA-ICP-MS analysis. The detrital zircons in meta-sandstones from the Taowan Group have three populations of-920-1 400, -1 600-2 100, and 〉2 200 Ma ages, whereas those from the Kuanping Group shows six populations with the peaks of -590, -767, -952, -1 590, -2 485, and -3 200 Ma. These data suggest that the boundary between the North China Craton and the North Qinling belt cannot simply be constrained by using the events determined from zircon U-Pb ages. The granitoid plutons with the magmatic age of 430 Ma were strongly deformed, while those with the magmatic age of -390 Ma show no or less deformation, indicating that the deformation of amalgamation between the North China Craton and the North Qinling belt ceased between 390 and 430 Ma.

关键词： Qinling orogenic belt Taowan Group Kuanping Group granitoid zircon age.

Reconstruction of Smoke Plume Concentration Peaks Based on Modified MAX-DOAS Tomography

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Chinese Journal of Chemical Physics 2015年第6期28卷 -页

作者： Min-hong Wei Min-ming Tong su-wen Li School of Physics and Electronic Information Huaibei Normal University Huaibei 235000 ChinaSchool of Information and Electrical Engineering China University of Mining and Technology Xuzhou 221116 China School of Information and Electrical Engineering China University of Mining and Technology Xuzhou 221116 China School of Physics and Electronic Information Huaibei Normal University Huaibei 235000 China

Optical tomography system based on modified simultaneous iterative reconstruction technique is designed to real-time monitor spatial distribution and diffusion process of smoke plume in a power plant. Concentration profiles, rather than just a point value, of smoke plume concentrations are the goal of this method, and the tomography algorithm is analyzed. According to incomplete projection data in the process of reconstruction and exiting noise interference, the modified simultaneous iterative reconstruction technique (SIRT) is adopted to extract the information of the trace gas concentration by a fan beam scanning and is compared to the conventional SIRT. Three evaluation indexes show that the reconstruction effect is the best by choosing proper relaxation factor, which reduces the index d to 0.044 from 0.435 and reduces the index r to 0.044 from 0.376 for 5500 iterations. Hence, the modified algorithm performs better in estimating the shape of the plume, this method is used to process the measured spectra in field campaign, the reconstruction results and the measured data are basically consistent, which is further confirmed by the experimental results.

关键词： Reconstruction DOAS tomography Retrieval Modified simultaneous iterative reconstruction technique

superposition of Coherent States in a Mesoscopic Josephson Junction with Dissipation

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Communications in Theoretical Physics 2001年第10期36卷 473-476页

作者： ZOU Jian SHAO Bin su wen-Yong Department of Applied Physics Beijing Institute of Technology Beijing 100081 China Department of Applied Physics Beijing Institute of Technology Beijing 100081 China Department of Applied Physics Beijing Institute of Technology Beijing 100081 China

A mesoscopic Josephson junction with dissipation is considered. Usually the dissipation in the system is described as a consequence of its coupling to a reservoir. By solving the master equation we show that the state... 详细信息

关键词： mesoscopic Josephson junction, superposition of coherent states, dissipation

Visible light response ZnO-C_(3)N_(4) thin film photocatalyst

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Rare Metals 2021年第1期40卷 96-104页

作者： Yue Zhang Shu-Man Zhao Qi-wen su Jun-Li Xu School of Science Northeastern University.Shenyang 110004China

Nanoflower-like ZnO-C_(3)N_(4) thin film with a porous net structure was successfully synthesized by a simple chemical corrosion *** prepared ZnOC_(3)N_(4) thin films presented remarkable photocatalytic activities for the degradation of methyl orange under visible light irradiation,and more than 90%methyl orange was removed from water by ZnO-C_(3)N_(4) ***,the ZnO-C_(3)N_(4) composite presented an enhanced photocatalytic *** loading content of C_(3)N_(4) had a great effect on the photocatalytic ***,the photocatalytic activities were higher in acidic media than those in alkaline *** adsorption of methyl orange was enhanced,and the recombination of photogenerated electrons and holes was suppressed with a suitable content of C_(3)N_(4).However,too much loading content of C_(3)N_(4) resulted in a poor dispersion of C_(3)N_(4) as the aggregated C_(3)N_(4) can behave as recombination *** addition,the prepared ZnO-C_(3)N_(4) thin film can be used for the water splitting in water-methanol system under simulated solar light irradiation.

关键词： ZnO-C_(3)N_(4)thin film Photodegradation Water splitting Visible light irradiation Photocatalytic stability

Effects of Siqi Decoction on Concentration of Nitric Oxide and Activity of Nitric Oxide Synthase in Blood Serum of Rats with Myocardial Ischemia

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Chemical Research in Chinese Universities 2008年第1期24卷 65-68页

作者： su Yan-bin LI Zheng-qiang su Yan-wen ZHANG Fen-rong School of Chemical and Pharmaceutical Engineering Jilin Institute of Chemical Technology Jilin 132022 P. R. China Key Laboratory of Molecular Etymology and Engineering Ministry of Education Jilin University Changchun 130021 P. R. China Jilin Provincial Institute for Drug and Food Control Changchun 130033 P. R. China

To study the effects of Siqi decoction on rats with Myocardial Ischemia, the model of Myocardium Ischemia was made for the Wistar rats cured with posterior pituitary injection through vein in tail. Siqi decoction, Diaoxinxuekang（DK） and Fufangdanshenpian（FD）, the latter two drugs of which were effective TCM drugs of anti-Myocardial Ischemia at present, were administrated to the rats with Myocardium Ischemia for 5 days to compare the effect of anti-Myocardium Ischemia as reference drugs by measuring the changes of NO concentration and activity of NOS in the rat blood serum with Myocardial Ischemia. There was a remarkable increase in the NO concentration and activity of NOS in serum in Siqi decoction groups compared with those in control group（p〈0.05）. The results of the prevention group in experiment of Siqi decoction are better than those of the cure group. Siqi decoction was really fit for Myocardium Ischemia via increasing NO concentration by stimulating the activity of NOS in serum. The effect of Siqi decoction against Myocardium Ischemia in preventive group is better than the curative that of Siqi decoction in the curative group.

关键词： Siqi decoction Myocardial Ischemia Posterior pituitary Nitric oxide(NO) Nitric oxide synthase(NOS)

Effect of Water Vapor Absorption on Measurements of Atmospheric Nitrate Radical by LP-DOAS

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Chinese Journal of Chemical Physics 2008年第5期21卷 433-437页

作者： su-wen Li wen-qing Liu Pin-hua Xie Yi-jun Yang De-bao Chen Zheng Li Department of Physics Huaibei Coal Industry Teachers College Huaibei 235000 China Key Laboratory of Environmental Optical and Technology Anhui Institute of Optics and Fine Me-chanics Chinese Academy of Sciences Hefei 230031 China

During the measurement of atmospheric nitrate radical by long-path differential optical absorption spectroscopy, water vapor strong absorption could affect the measurement of nitrate radical and detection limits of system. Under the tropospheric condition, the optical density of water vapor absorption is non-linearly dependent on column density. An effective method was developed to eliminate the effect of water vapor absorption. Reference spectra of water vapor based on the daytime atmospheric absorption spectra, when fitted together with change of cross section with water vapor column densities, gave a more accurate fitting of water vapor absorptions, thus its effect on the measurements of nitrate radical could be restricted to a minimum and detection limits of system reached 3.6 ppt. The modified method was applied during an intensive field campaign in the Pearl River Delta, China. The NO3 concentration in polluted air masses varied from 3.6 ppt to 82.5 ppt with an average level of 23.6±1.8 ppt.

关键词： Nitrate radical Water vapor absorption Long-path differential optical absorption spectroscopy Detection limit