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Photodissociation Dynamics of Methanol and Ethanol at 157 nm

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Chinese Journal of Chemical Physics 2008年第4期21卷 301-307页

作者： Kai-jun Yuan Yuan Cheng feng-yan wang Xue-ming yang State Key Laboratory of Molecular Reaction Dynamics Dalian Institute of Chemical Physics ChineseAcademy of Sciences Dalian 116023 China

157 nm photodissociation of jet-cooled CH3OH and C2HsOH was studied using the high-n Rydberg atom time-of-flight （TOF） technique. TOF spectra of nascent H atom products were measured. Simulation of these spectra reveals three different atomic H loss processes： one from hydroxyl H elimination, one from methyl （ethyl） H elimination, and one from secondary dissociation of the methoxy （ethoxy） radical. The relative branching ratio indicates secondary dissociation of ethoxy is less important than that of methoxy. The average angular anisotropy parameter of methanol is negative （with β≈-0.3）, indicating the transition dipole moment is perpendicular to the C-O-H plane. The slightly more negative β value of ethanol （with β≈-0.4） implies that ethanol has a longer rotational period. These experimental results indicate that both systems undergo fast internal conversion to the 3s surface after it is excited to the 3px surface, and then dissociate on the 3s surface. The translational energy distribution of the CH3O＋H products reveals extensive CH3 rocking or CH3 umbrella excitation in the CH30 radical. However the vibrational structures are not resolved in the C2H5O radical.

关键词： Photodissociation dynamics H atom channel VUV photolysis

A Velocity Map Ion-imaging Study on Ketene Photodissociation at 218 nm

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Chinese Journal of Chemical Physics 2006年第1期19卷 1-5页

作者： Jie Liu feng-yan wang Hua wang Bo Jiang Xue-ming yang State Key Laboratory of Molecular Reaction Dynamics Dalian Institute of Chemical Physics ChineseAcademy of Sciences Dalian 116023 China

Photodissociation dynamics of ketene at 218 nm has been investigated using the velocity map ion-imaging method. Both angular and translational energy distributions for the CO products at different rotational and vibrational states have been obtained. The 2＋1 REMPI spectrum of CO products is also obtained. The results are as bellow：（i） CO products in the first two vibrational states （ v＂=0 and v＂=1 ） exhibit significant rotational excitation. Furthermore the rotational excitation of CO at the v＂=0 level is noticeably higher than that at the v＂=1 level. （ii） It was found that the major photodissociation pathway of ketene at 218 nm is the CH2（ǎ^1A1）＋CO（X^1∑^＋） channel, while the CH2（b^1B1）＋CO（X^1∑^＋） channel and the CH2（X^3B1）＋CO（X^1E^＋） channel are also likely present, （iii） The anisotropy parameters β of CO different rovibronic states all appear to be larger than zero. No significant difference is observed at the two vibrational states,

关键词： Velocity map ion-imaging Photodissociation Anisotropy parameter Translational energy distribution

Enzymatic Synthesis and Characterization of Novel Polycarbonates Derived from 5-Allyloxy-1, 3-dioxan-2-one and 5, 5-Dimethvl-1.3-dioxan-2-one

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Chinese Chemical Letters 2006年第10期17卷 1385-1387页

作者： yan Ping wang feng HE Gang LIU Ren Xi ZHUO Key Laboratory of Biomedical Polymers of Ministry of Education Department of Chemistry Wuhan University Wuhan 430072

Novel polycarbonates from 5-allyloxy-1, 3-dioxan-2-one （ATMC） with 5, 5-dimethyl- 1, 3-dioxan-2-one （DTC） were successfully synthesized for the first time using immobilized porcine pancreas lipase （IPPL） as catalyst. The resulting copolymers were characterized by IR, ^1H NMR, ^13C NMR and GPC. The molecular weight （Mn） of the copolymer with molar feed ratio of 10：90 （ATMC：DTC） was 9300 and the polydispersity was 1.31, while the Mn increased to 14300 and polydispersity of 1.25 with the feed ratio of 50：50. Moreover, the composition of the copolymers agreed well with the monomer feed.

关键词： 5-Allyloxy-1 3-dioxan-2-one 5 5-dimethyl-1 3-dioxan-2-one enzyme-catalyzed ring opening polymerization polycarbonates.

UV Photodissociation Dynamics of Nitric Acid： The Hydroxyl Elimination Channel

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Chinese Journal of Chemical Physics 2009年第2期22卷 191-196页

作者： feng-yan wang Zhi-chao Chen Yong-wei Zhang Quan Shuai Bo Jiang Dong-xu Dai Xiu-yan wang Xue-ming yang State Key Laboratory of Molecular Reaction Dynamics Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian 116023 China

Sliced velocity mapping ion imaging technique was employed to investigate the dynamics of the hydroxyl elimination channel in the photodissociaiton of nitric acid in the ultraviolet region. The OH product was detected by （2＋1） resonance enhanced multiphoton ionization via the D^2∑^- electronic state. The total kinetic energy spectra of the OH＋NO2 channel from the photolysis of HONO2 show that both ：NO2（X2A1） and NO2（A2B2） channels are present, suggesting that both 1^1A″ and 2^1A″ excited electronic states of HONO2 are involved in the excitation. The parallel angular distributions suggest that the dissociation of the nitric acid is a fast process in comparison with the rotational period of the HNO3 molecule. The anisotropy parameter β for the hydroxyl elimination channel is found to be dependent on the OH product rotational state as well as the photolysis energy.

关键词： Slice imaging technique Photodissociation dynamics Nitric acid OH radical Resonance enhanced multiphoton ionization

High-efficiency crystalline white organic lightemitting diodes

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Light(Science & Applications) 2024年第4期13卷 747-759页

作者： Yijun Liu feng Zhu Yue wang Donghang yan State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China. School of Applied Chemistry and Engineering University of Science and Technology of ChinaHefei 230026China. State Key Laboratory of Supramolecular Structure and Materials Jilin UniversityChangchun 130012China

Crystalline white organic light-emitting diodes(C-WOLEDs)are promising candidates for lighting and display *** is urgently necessary,however,to develop energy-saving and high-efficiency C-WOLEDs that have stable and powerful emission to meet commercial ***,we report a crystalline host matrix(CHM)with embedded nanoaggregates(NA)structure for developing high-performance C-WOLEDs by employing a thermally activated delayed fluorescence(TADF)material and orange phosphorescent dopants(Phos.-D).The CHM-TADFNA-D WOLED exhibit a remarkable EQE of 12.8%,which is the highest performance WOLEDs based on crystalline *** device has a quick formation of excitons and a well-designed energy transfer process,and possesses a fast ramping of luminance and current *** to recently reported high-performance WOLEDs based on amorphous material route,the C-WOLED achieves a low series-resistance Joule-heat loss ratio and an enhanced photon output,demonstrating its significant potential in developing the next-generation WOLEDs.

关键词： diodes dopant crystalline

Subarachnoid disseminative hemangiopericytoma of the spinal cord

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Chinese Medical Journal 2010年第11期123卷 1485-1488页

作者： LIN Guo-zhong wang Zhen-yu LI Zhen-dong ZHONG yan-feng wang Lei-ming Department of Neurosurgery Peking University Third HospitalPeking University Beijing 100191 China

Hemangiopericytomas （HPCs） originating from central nervous system were increasingly reportedrecently. Intravertebral HPCs are preclomlnanuy eplaural. Primary intradural HPCs of spinal cord are rare. Little subarach... 详细信息

关键词： hemangiopericytoma cervical spinal cord subarachnoid disseminateion

Imaging Reaction Dynamics of Y+SO2

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Chinese Journal of Chemical Physics 2020年第2期33卷 239-242,I0003页

作者： Dong yan Yu-jie Ma Fang-fang Li Jia-xing Liu Guan-jun wang feng-yan wang Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials Collaborative Innovation Center of Chemistry for Energy Materials(iChEM)Fudan UniversityShanghai 200433China

The reaction dynamics of yttrium atoms with sulfur dioxide molecules at a high collision energy of 36 kcal/mol was studied using time-sliced velocity map ion imaging,crossed molecular beam and laser-ablation *** product YO was detected via multiphoton ionization at various wavelengths in the region of 482-615 *** slice images of YO show a broad velocity distribution and forward-backward peaking angular *** forward scattering signal is stronger than its backward *** indicates that the reaction proceeds via an intermediate complex and the lifetime of the intermediate state is less than one rotational *** formation of complex suggests that electron transfer occurs in the oxidation reaction.

关键词： Time-sliced velocity map imaging Crossed-beam Laser ablation Metal atom reaction dynamics SO2

Application of Bionic Technology in Marine Cruise Equipment:Research Progress and Development Trends

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Journal of Bionic Engineering 2024年第3期21卷 1117-1155页

作者： Kunhui Luo Lan yan Zhiyi Zhu Zhongqiu wang Hongru wang feng Jiang School of Electromechanical and Automation Huaqiao UniversityXiamen36102China National Local Joint Engineering Research Center for Intelligent Manufacturing Technology of Brittle Material Products Xiamen361021China Institute of Oceanographic Instrumentation Shandong Academy of SciencesQilu University of Technology(Shandong Academy of Sciences)Qingdao266100China Shandong Provincial Key Laboratory of Marine Monitoring Instrument Equipment Technology Qingdao266100China National Engineering and Technological Research Center of Marine Monitoring Equipment Qingdao266100China Institute of Manufacturing Engineering Huaqiao UniversityXiamen361021China

This article provides an overview of the application of bionic technology in marine cruising equipment,discussing its research progress and future development *** cruising is a crucial means of gaining insights into the marine environment and conducting scientific ***,conventional marine cruising equipment faces numerous challenges when dealing with complex and ever-changing marine *** technology,as a means of drawing inspiration from the structure and functions of living organisms,offers new approaches and methods to address the challenges faced by marine cruising equipment and has found widespread *** article primarily focuses on the applications and historical developments of bionic technology in propulsion methods,drag reduction,and surface *** summarizes the design principles,manufacturing techniques,and optimization methods for marine biomimetic cruising ***,this paper analyzes the achievements,challenges,and future directions of bionic technology in marine cruising *** application of bionic technology in marine cruising equipment holds vast potential for development,enabling us to better confront the challenges of marine exploration and research by drawing wisdom from nature and driving advancements in marine science.

关键词： Marine cruising equipment Bionic technology Propulsion methods Drag reduction Surface antifouling

PEGylated graphene oxide-mediated stimulation of vascular endothelial cells and responsive release of PD-1/PD-L1 inhibitor for efficient chemo-immunotherapy against cancer Author links open overlay panel

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Particuology 2024年第8期91卷 280-290页

作者： yan wang feng Li Shuang wang Jiaqi Meng Xiao Zhang Wei Wei State Key Laboratory of Biochemical Engineering Institute of Process EngineeringChinese Academy of SciencesBeijing100190China Key Laboratory of Biopharmaceutical Preparation and Delivery Chinese Academy of SciencesBeijing100190China School of Chemical Engineering University of Chinese Academy of SciencesBeijing100049China

Immune checkpoint blockade(ICB)has emerged as a promising immunotherapeutic modality against cancer in the ***,only 10-30%of patients respond to ICB,primarily due to poor immunogenicity and insufficient T cell infiltration in solid ***,we presented an approach for high-performance cancer treatment using the programmed cell death protein-1 and programmed cell death ligand-1(PD-1/PD-L1)inhibitor(BMS-202)-loaded PEGylated graphene oxide(GPi).On the one hand,GPi dissociated tight junctions of vascular endothelial cells(VECs)in tumor,thus promoting the extravasation and intratumoral accumulation of liposomal doxorubicin(LipDox),which then effectively induced immunogenic cell death of tumor *** the other hand,GPi also stimulated VECs to upregulate the expression of cell-cell interaction molecules,such as intercellular cell adhesion molecule-1 and vascular cell adhesion molecule-1,which facilitated the infiltration of T cells in *** acting as a stimulator of VECs,GPi could exert responsive release of BMS-202 under the acidic tumor microenvironment and blockade PD-1/PD-L1 axis in ***,the alternating administration of GPi and LipDox effectively inhibited tumor growth in a 4T1 tumor model,providing a novel treatment mode for chemo-immunotherapy.

关键词： PEGylated graphene oxide Vascular endothelial cells Immune checkpoint blockade Immunogenic cell death Chemo-immunotherapy