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Journal of Innovative Optical Health Sciences 2011年第3期4卷 261-268页

作者： ZHONGCHI LUO congwu DU Department of Biomedical Engineering SUNY at Stony Brook Stony BrookNY 11794USA Medical Department Brookhaven National Laboratory UptonNY 11973-5000USA Department of Anesthesiology SUNY at Stony Brook Life Science BuildingRoom 002 Stony BrookNY 11794USA

Since the dual-wavelength spectrophotometer was developed,it has been widely used for studying biological samples and applied to extensive investigations of the electron transport in respiration and redox cofactors,redox state,metabolic control,and the generation of reactive oxygen species in ***,we discuss some extension of dual-wavelength approaches in our research to study the physiological and functional changes in intact hearts and in vivo ***,we aimed at(1)making nonratiometricfluorescent indicator become ratiometricfluorescence function for investigation of Ca^(2+) dynamics in live tissue;(2)eliminating the effects of physiological changes on measurement of intracellular calcium;(3)permitting simultaneous imaging of multiple physiological *** animal models of the perfused heart and transiently ischemic insult of brain are used to validate these approaches for physiological applications.

关键词： Dual-wavelength optical spectroscope and biomedical imaging heart brain Rhod2 fluorescence

An Edge-Cloud Collaborative Cross-Domain Identity-Based Authentication Protocol with Privacy Protection

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Chinese Journal of Electronics 2022年第4期31卷 721-731页

作者： SUN Haipeng TAN Yu'an LI congwu LEI Lei ZHANG Qikun HU Jingjing School of Computer Science and Technology Beijing Institute of Technology The 30th Research Institute of China Electronics Technology Group Corporation China Electronic Science Research Institute of CETC School of Computer and Communication Engineering Zhengzhou University of Light Industry

Edge-cloud collaborative application scenario is more complex, it involves collaborative operations among different security domains, frequently accessing and exiting application system of mobile terminals. A cross-domain identity authentication protocol based on privacy protection is proposed. The main advantages of the protocol are as follows. 1) Self-certified key generation algorithm: the public/private key pair of the mobile terminal is generated by the terminal members themselves. It avoids security risks caused by third-party key distribution and key escrow; 2) Cross-domain identity authentication: the alliance keys are calculated among edge servers through blockchain technology. Cross-domain identity authentication is realized through the signature authentication of the alliance domain. The cross-domain authentication process is simple and efficient; 3) Revocability of identity authentication: When the mobile terminal has logged off or exited the system, the legal identity of the terminal in the system will also become invalid immediately, so as to ensure the forward and backward security of accessing system resources. Under the hardness assumption of discrete logarithm problem and computational Diffie-Hellman problem, the security of the protocol is proven, and the efficiency of the protocol is verified.

关键词： Identity authentication Privacy protection Edge-cloud collaborative Revocability identity

Selenium-containing core-expanded naphthalene diimides for high performance n-type organic semiconductors

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Science China Chemistry 2020年第9期63卷 1182-1190页

作者： Wenjie Han Zhongli Wang Yunbin Hu Xiaodi Yang congwu Ge Xike Gao Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules Centre for Excellence in Molecular SynthesisShanghai Institute of Organic ChemistryUniversity of Chinese Academy of SciencesChinese Academy of SciencesShanghai 200032China Experiment Center for Science and Technology Shanghai University of Traditional Chinese MedicineShanghai 201203China

The incorporation of heavy atoms into molecular backbone is an extremely straightforward strategy for fine-tuning the optoelectronic properties of organic ***,it is rarely studied in n-type small ***,by selenium substitution of NDI3 HU-DTYM2,two Se-decorated core-expanded naphthalene diimides(NDI)derivatives DTYM-NDI3 HUDSYM(1)and NDI3 HU-DSYM2(2)were *** comparison with the reference S-containing compound NDI3 HUDTYM2,the highest occupied molecular orbital(HOMO)and lowest unoccupied molecular orbital(LUMO)energy levels of 1 and 2 were fine-tuned with?HOMO of about 0.2 e V,?LUMO of 0.1 e V and the narrowed HOMO-LUMO *** surprisingly,the as-spun organic thin film transistors(OTFTs)based on 1 and 2 both showedμe,satvalues as high as1.0 cm2 V-1 s-1,which are 2-fold higher than that of NDI3 HU-DTYM2 with the same device structure and measurement *** addition,the single crystal OFET devices based on Se-containing compound NDI2 BO-DSYM2 showed a highμe,satvalue of 1.30 cm2 V-1 *** molecular packing of NDI2 BO-DSYM2 in single crystals(two-dimensional supramolecular structure formed by intermolecular Se···Se interactions)is quite different from that of a S-containing compound NDI-DTYM2(one dimensional supramolecular structure formed by intermolecularπ-πstacking).Therefore,the Se substitution can cause dramatic change about molecular stacking model,giving rise to high n-type OTFT *** results demonstrated an effective strategy of the heavy atom effect for designing novel organic semiconductors.

关键词： organic semiconductors selenium naphthalene diimides organic thin film transistors charge mobility

1,2,5,6-Naphthalene Diimides:A Class of Promising Building Blocks for Organic Semiconductors

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Chinese Journal of Chemistry 2023年第10期41卷 1226-1234页

作者： Zheng Zhao congwu Ge Xueqian Zhao Jintao Huang Xike Gao Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules Shanghai Institute of Organic ChemistryUniversity of Chinese Academy of SciencesChinese Academy of SciencesShanghai 200032China

Organic semiconductors have drawn extensive atten-tion due to their optoelectronic properties and wide applications in organic *** comparison with the popular 1,4,5,8-naphthalene diimides(1,4,5,8-NDIs),the angular-shaped 1,2,5,6-NDIs have exhibited tunable photophysical properties,self-as-sembly behaviors and charge transporting *** to these unique features,1,2,5,6-NDIs show great potential for construction of high performance n-func-tional *** this review,we highlight the recent advances and future prospects of 1,2,5,6-NDI-basedπ-systems in the field of organic optoelectronics,in-cluding molecular design,synthesis,structure-prop-erty relationships as well as the applications in high performance organic field-effect transistors,organic photovoltaics,perovskite solar cells,and so on.

关键词： Organic semiconductors Electron acceptors Design and synthesis 1,2,5,6-NDI Structural isomerism Polymer acceptors Organic electronics

Largeπ-extended donor-acceptor polymers for highly efficient in vivo near-infrared photoacoustic imaging and photothermal tumor therapy

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Science China Chemistry 2021年第12期64卷 2180-2192页

作者： Jiangao Li Hanlin Ou Jing Li Xiaodi Yang congwu Ge Dan Ding Xike Gao Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules Shanghai Institute of Organic ChemistryUniversity of Chinese Academy of SciencesChinese Academy of SciencesShanghai200032China State Key Laboratory of Medicinal Chemical Biology Key Laboratory of Bioactive MaterialsMinistry of EducationCollege of Life SciencesNankai UniversityTianjin300071China China Innovation Research Institute of Traditional Chinese Medicine Shanghai University of Traditional Chinese MedicineShanghai201203China

Semiconducting polymers(SPs)with intensive near-infrared(NIR)absorption and high photothermal conversion efficiencies have been employed as a new generation of photothermal agents(PTAs)for“all-in-one”theranostic nanoplatforms with integrated photoacoustic imaging(PAI)and photothermal therapy(PTT)***,the lack of facile molecular design principles impedes the development of highly efficient NIR ***,a facile molecular design strategy based on largeπ-extended donor-acceptor(L-π-D-A)structure is reported for achieving SPs(SP1-SP3)with highly efficient in vitro and in vivo PAI and PTT *** adjusting the conjugation length and planarity of the donor units,both SP3 and corresponding nanoparticle(SPN)SPN3 exhibit stronger D-A strength,intensive NIR absorption,enhanced absorption coefficient,and higher photothermal conversion efficiency(up to 61.8%).The excellent photothermal conversion efficiencies make SPN1-SPN3 produce efficient inhibition of tumor growth with excellent biocompatibility and prominent PAI performance with a high contrast manner in living mice at a low systemic injection *** research highlights that the new L-π-D-A molecular design is an effective strategy to obtain highly efficient polymeric NIR PTAs for high desirable cancer phototheranostic nanoplatforms.

关键词： D-A polymers near-infrared photothermal agents photoacoustic imaging photothermal therapy

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Study on the assimilation of the sulphate reaction rates based on WRF-Chem/DART

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Science China Earth Sciences 2023年第10期66卷 2239-2253页

作者： congwu HUANG Chaoqun MA Tijian WANG Yawei QU Mengmeng LI Shu LI Bingliang ZHUANG Min XIE Faculty of Resources and Environmental Science Hubei UniversityWuhan430062China School of Atmospheric Sciences Nanjing UniversityNanjing210023China College of Intelligent Science and Control Engineering Jinling Institute of TechnologyNanjing211169China

Sulphate(SO_(4)^(2-))is a main component of PM_(2.5)in *** chemical formation mechanisms of sulphate are complex,and many air quality models have been used to analyse these *** improve the accuracy of Weather Research Forecast-Chemistry(WRF-Chem)on sulphate,an alternative method is proposed in this ***,data assimilation is performed to adjust the chemical reaction rates of *** on the original reactions,a new sulphate parameterisation scheme,which includes two hypothetical reactions and six undetermined parameters,was *** on the WRF-Chem/DART(Data Assistance Research Testbed)system,the near-ground concentrations of SO_(4)^(2-),SO_(2),NO_(2),O_(3)and particulate matter are assimilated to adjust the six *** adjusting the parameters,the new scheme can effectively solve the underestimation of SO_(4)^(2-)and overestimation of SO_(2).The simulation of SO_(4)^(2-)improved as the mean bias changed from-13.1μg m^(-3)to 3.5μg m^(-3)while SO_(2)improved from 17.0μg m^(-3)to 6.3μg m^(-3).The temporal and spatial variation characteristics predicted by the new scheme are consistent with the theoretical research results,indicating that the complex mechanism of sulphate formation could be replaced by the temporal and spatial variation characteristics predicted by the new scheme and that the parameters can be adjusted by data ***,the reaction rates of the SO_(4)^(2-)parameterisation scheme of the WRF-Chem model are improved in this study,and a new method for improving the accuracy of the air quality model is provided.

关键词： Sulphate Chemical reaction rate WRF-Chem/DART Data assimilation Air quality forecast

Role of interfacial electron transfer reactions on sulfamethoxazole degradation by reduced nontronite activating H_(2)O_(2)

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Journal of Environmental Sciences 2023年第2期124卷 688-698页

作者： Hao-Jie Cui Yaqi Ning congwu Wei Peng Dong Cheng Lichu Yin Weijun Zhou Wenjuan Liao College of Resources and Environment Hunan Agricultural UniversityChangsha 410128China College of Environment Zhejiang University of TechnologyHangzhou 310014China

It has been documented that organic contaminants can be degraded by hydroxyl radicals(•OH)produced by the activation of H2O2 by Fe(II)-bearing ***,the interfacial electron transfer reactions between structural Fe(Ⅱ)and H_(2)O_(2) for•OH generation and its effects on contaminant remediation are *** this study,we first investigated the relation between•OH generation sites and sulfamethoxazole(SMX)degradation by activating H2O2 using nontronite with different reduction ***(5.2–16.9μmol/L)degradation first increased and then decreased with an increase in the reduction extent of nontronite from 22% to 62%,while the•OH production increased *** treatment of edge sites and structural variation results revealed that interfacial electron transfer reactions between Fe(Ⅱ)and H2O2 occur at both the edge and basal *** enhancement on basal plane interfacial electron transfer reactions in a high reduction extent rNAu-2 leads to the enhancement on utilization efficiencies of structural Fe(Ⅱ)and H_(2)O_(2) for•OH ***,the•OH produced at the basal planes is less efficient in oxidizing SMX than that of at edge *** of SMX could be sustainable in the H_(2)O_(2)/rNAu-2 system through chemically *** results of this study show the importance role of•OH generation sites on antibiotic degradation and provide guidance and potential strategies for antibiotic degradation by Fe(Ⅱ)-bearing clay minerals in H2O2-based treatments.

关键词： Reduced nontronite Electron transfer Sulfamethoxazole degradation Reaction sites Hydroxyl radicals

DETECTION OF Ca^(2+)-DEPENDENT NEURONAL ACTIVITY SIMULTANEOUSLY WITH DYNAMIC CHANGES IN CEREBRAL BLOOD VOLUME AND TISSUE OXYGENATION FROM THE LIVE RAT BRAIN

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Journal of Innovative Optical Health Sciences 2009年第2期2卷 189-200页

作者： congwu DU ZHONGCHI LUO MEI YU HELENE BENVENISTE MELISSA TULLY RUBING PAN BRITTON CHANCE Medical Department Brookhaven National Laboratory UptonNY 11973-5000USA Department of Biomedical Engineering SUNY at Stony Brook Stony BrookNY 11794USA Department of Anesthesiology SUNY at Stony Brook Stony BrookNY 11794USA Department of Biology University of Illinois at Urbana-Champaign UrbanaIL 61801 Department of Biophysics and Physical Chemistry University of Pennsylvania PhiladelphiaPA19104

We present a catheter-based optical diffusion and fluorescence(ODF)probe to study the functional changes of the brain in *** ODF probe enables the simultaneous detection ofthe multi-wavelength absorbance and fluorescence emission from the living rat *** previous studies,including a transient stroke experiment of the rat brain as well as the brainresponse to cocaine,have established the feasibility of simultaneously determining changes incerebral blood volume(CBV),tissue oxygenation(StO2)and intracellular calcium([Ca^(2+)]i,using the fluorescence indicator Rhod2).Here,we present our preliminary results of somatosensory response to electrical forepaw stimulation obtained from the rat cortical brain by using theODF probe,which indicate that the probe could track brain activation by directly detecting[Ca^(2+)]i along with separately distinguishing CBV and StO2 in real *** changes of CBV,StO2 and[Ca^(2+)]i are comparable with the blood-oxygen-level-dependent(BOLD)response tothe stimulation obtained using functional magnetic resonance imaging(fMRI).However,thehigh temporal resolution of the optical methodology is advanced,thus providing a new modalityfor brain functional studies to understand the hemodynamic changes that underlie the neuronalactivity.

关键词： Optical spectroscopy calcium fluorescence Rhod2 labeling brain ischemia and cocaine addiction forepaw stimulation.

Azulenoisoindigo: A building block for π-functional materials with reversible redox behavior and proton responsiveness

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Chinese Chemical Letters 2022年第4期33卷 2147-2150页

作者： Bin Hou Jing Li Xiaodi Yang Jianwei Zhang Hanshen Xin congwu Ge Xike Gao Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules Shanghai Institute of Organic ChemistryUniversity of Chinese Academy of SciencesChinese Academy of SciencesShanghai 200032China Experiment Center for Science and Technology Shanghai University of Traditional Chinese MedicineShanghai 201203China

Azulene, one of representative nonbenzenoid aromatic hydrocarbons, exhibits unique molecular structure and distinctive physical and chemical properties. Herein, azulenoisoindigo(Az II), an azulene-based isoindigo analogue, is designed and synthesized, which has a twisted molecular backbone and R/Sisomers in single crystals. Interestingly, Az II shows the characteristics of both isoindigo and azulene,such as reversible redox behavior and reversible proton responsiveness. UV-vis-NIR,^(1)H NMR and electron paramagnetic resonance(EPR) measurements were carried out to get insights into the possible mechanism of the proton-responsive property of Az II. The results demonstrated that only one azulenyl moiety of molecule of Az II was protonated and deprotonated, and the protonated Az II can be further oxidized to form azulenium cation radicals.

关键词： Azulene Nonbenzenoid aromatic hydrocarbons Isoindigo π-Functional materials Proton responsiveness

Benzothiophene and benzosulfone fused pyrazino[2,3-g]quinoxaline:Synthesis and semiconducting properties

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Chinese Chemical Letters 2023年第2期34卷 563-566页

作者： Fangwei Ding Debin Xia Xiping Ding Ruibin Deng congwu Ge Yulin Yang Ruiqing Fan Kaifeng Lin Xike Gao MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage School of Chemistry and Chemical EngineeringHarbin Institute of TechnologyHarbin 150001China Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules Shanghai Institute of Organic Chemistry Chinese Academy of SciencesShanghai 200032China

A novel air-stable n-type benzothiaphene endcapped azaarene(BTPQ) and its sulfonated derivative(BSPQ) were prepared via two pathways and characterized by NMR, UV–vis, fluorescence and cyclic voltammetry spectroscopy. Symmetrically introducing four nitrogen atoms into acenes, the semiconductor properties could be changed from p-type to n-type detected through the space charge limited current(SCLC) method. After sulfonation of BTPQ, BSPQ is with deeper frontier orbital energy levels and enhanced the electron mobility.

关键词： Azaarenes Deep LUMO levels n-type Organic semiconductor Polycyclic aromatic hydrocarbons