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Insight into the structural transformation of tetraphenylethylene acids at liquid–solid interface induced by linear aminofunctionalized triazine derivatives and annealing treatment

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Nano Research 2023年第12期16卷 13335-13342页

作者： Ting Meng Xuan Peng Xunwen Xiao Ke Deng Yu-Wu Zhong qingdao Zeng CAS Key Laboratory of Standardization and Measurement for Nanotechnology CAS Center for Excellence in NanoscienceNational Center for Nanoscience and Technology(NCNST)Beijing 100190China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China School of Science Nanchang Institute of TechnologyNanchang 330099China Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of PhotochemistryInstitute of ChemistryChinese Academy of SciencesBeijing 100190China College of Materials and Chemical Engineering Ningbo University of TechnologyNingbo 315211China

The interaction between organic photoelectric molecules leads to the formation of a certain aggregation structure,which plays a pivotal role in the charge transport at the intermolecular *** view of this,we investigated the mechanism and law of intermolecular interaction by detecting the self-assembled behaviors between organic photoelectric molecules at the interface by scanning tunneling microscopy(STM).In this work,the structural transformations of tetraphenylethylene acids(H_(4)ETTCs)on graphite surface induced by temperature and triazine derivatives(zcy-19,zcy-27,and zcy-38 molecules)were studied by STM technology and density functional theory(DFT)*** room temperature,zcy-19 and H_(4)ETTC molecules formed a small range of ordered co-assembled nanostructure,while for zcy-27 or zcy-38 molecules,no co-assembled nanostructures were observed and only their own self-assembled structures existed on graphite surface,*** the thermal annealing trials,the original co-assembled H_(4)ETTC/zcy-19 structure disappeared,and only zcy-19 and H_(4)ETTC self-assembled in separate ***,new well-ordered H_(4)ETTC/zcy-27 or H_(4)ETTC/zcy-38 co-assembled structures appeared at different annealing temperatures,*** with DFT calculations,we further analyzed the mechanism of such structural transformations by triazine derivatives and *** reveal that triazine derivatives could interact with H_(4)ETTC by N–H···O and O–H···N hydrogen bondings,and whether temperature or zcy series compounds could achieve successful regulation of H_(4)ETTC assembly behavior is closely associated with the conjugated skeleton length of zcy series compounds.

关键词： tetraphenylethylene acids triazine derivatives annealing treatment scanning tunneling microscopy(STM)

Investigation of 'chazi'(damaged-enamels)on Chenghua doucai Porcelains

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Science China(Technological Sciences) 2009年第6期52卷 1722-1729页

作者： DU Feng1 & SU BaoRu2 1 Institute of Chemistry & Molecular Engineering,qingdao university of Science & Technology,qingdao,China 2 College of Information Science & Technology,qingdao university of Science & Technology,qingdao,China Institute of Chemistry & Molecular Engineering Qingdao University of Science & Technology Qingdao China College of Information Science & Technology Qingdao University of Science & Technology Qingdao China

At the end of the 1950s,Sun Yingzhou considered that the 'chazi'(damaged colour)on Chenghua doucai imperial porcelain as a defect was originally produced in firing process during Chenghua period(1465―1487).Researchers in China have accepted his *** any fragment with the 'chazi' has never been found in several tons of Chenghua imperial sherds excavated from Ming imperial kiln site in *** China,few scholars have questioned the formation of 'chazi',and further investigated *** researchers at the Research Laboratory in the British Museum,employing unde-structive EDXRF,have analyzed the chemical composition of the 'chazi'(damaged colour)on a Chen-ghua doucai stem cup in the museum,and they have confirmed that the 'chazi'(damaged colour)was caused by the fire of the Jianfu palace in the Forbidden City in *** on their research,the authors studied the colour chemical principle of the 'chazi's' formation *** to the ceramic technology principle,scientific reasoning for the 'chazi' was carried *** the help of the history of Qing court,the brainteaser of the 'chazi' was totally uncovered,the misunderstanding for the 'chazi' has also been *** research also suggests that employing modern science and technology is a direction to study Chinese ancient ceramic further.

关键词： Chenghua doucai porcelains court eunuchs the set on fire at the Jianfu palace ’chazi’(damaged-enamels) the British Museum colour chemical principle archaeology using science and technology

The local classifications of the ruled surfaces of normals and binormals of a regular space curve

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Science China Mathematics 2007年第4期50卷 533-548页

作者： Jian-fei XIONG School of Mathematical Sciences, qingdao university, qingdao 266071, China School of Mathematical Sciences Qingdao University Qingdao China

The ruled surfaces of normals and binormals of a space curve is locally classified under the left-right action according to the types of the curve. In order to do this some useful results are obtained on the relations... 详细信息

关键词： local classification left-right equivalence orthogonal-right equivalence ruled surface normal and binormal

A model study on carbon cycle and phytoplankton dynamical processes in the Bohai Sea

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Acta Oceanologica Sinica 2003年第1期22卷 47-56页

作者： WeiHao ZhaoLiang FengShizuo InstituteofPhysicalOceanography OceanUniversityofChina(OceanUniversityofQingdao)Qingdao266003China PhysicalOceanographyKeyLabofStateEducationMinistry OceanUniversityofChina(OceanUnivrsityofQingdao)Qingdao266003China

The carbon cycle of lower trophic level in the Bohai Sea is studied with a three-dimensional biological and physical coupled model. The influences of the processes (including horizontal advection, river nutrient load, active transport etc. ) on the phytoplankton biomass and its evolution are estimated. The Bohai Sea is a weak sink of the CO2 in the atmosphere. During the cycle, 13.7% of the gross production of the phytoplankton enter the higher trophic level and 76.8 % of it are consumed by the respiration itself. The nutrient reproduction comes mainly from the internal biogeochemical loop and the rem-ineralization is an important mechanism of the nutrient transfer from organic form to inorganic. Horizontal advection decreases the total biomass and the eutrophication in some sea areas. Change in the nutrient load of a river can only adjust the local system near its estuary. Controlling the input of the nutrient, which limits the alga growth, can be very useful in lessening the phytoplankton biomass.

关键词： Carbon cycle phytoplankton dynamics the Bohai Sea

The advancement of oscillation theory of functional differential equations

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Chinese Science Bulletin 1998年第12期43卷 974-982页

作者： ZHANG Binggen Department of Applied Mathematics, Ocean university of qingdao, qingdao 266003, China Department of Applied Mathematics Ocean University of Qingdao Qingdao China

The oscillation theory of functional differential equations (FDEs) is surveyed including (ⅰ) formulation of oscillation problems; (ⅱ) a brief history of the oscillation theory of FDEs; (ⅲ) main topics in the oscill... 详细信息

关键词： functional differential equations oscillation theory.

On Browkin's conjecture about the elements of order five in K_2(Q)

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Science China Mathematics 2007年第1期50卷 116-120页

作者： Ke-jian XU Department of Mathematics, qingdao university, qingdao 266071, China Department of Mathematics Qingdao University Qingdao China

Based on the work of Lenstra, a succinct proof of Browkin’s conjecture about the elements of order five in K2(Q) is given.

关键词： K2 group cyclotomic polynomial lattice binary quartic form.

Comparative studies on utilizing nitrogen capacity between two macroalgae Gracilaria tenuistipitata var. liui (rhodophyta) and Ulva pertusa (chlorophyta) I. Nitrogen storage under nitrogen enrichment and starvation

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Journal of Environmental Sciences 2001年第3期13卷 318-322页

作者： LIU Jing Wen, DONG Shuang Lin (Aquaculture Research Laboratory, Ocean university of qingdao, qingdao 266003, China. 青岛海洋大学山东青岛 266003

This paper deals with the N storage of Gracilaria tenuistipitata var. liui and Ulva pertusa under ammonium enrichment and starvation. After 10 days of ammonium enrichment, ammonium NH4,+ free amino acid (FAA), protein (pro), chlorophyll (Chi), phycoerythrin (PE) and total dissolved nitrogen (TDN) of the two macroalgae increased significantly. Total nitrogen (TN) increased significantly from 3.65% to 5.78% dry weight of G. tenuistipitata var. liui and 2.82% to 5.07% dw of U. pertusa, respectively. Protein and FAA were the most important N storage pools in the macroalgae. During N-starvation period, individual N pools of the two species were depleted at exponential rates. Each N pool in U. pertusa decreased more rapidly than in G. tenuistipitata, var. liui and the latter was able to sustain fast growth for more time ( > 20 days) than U. pertusa. N demands for supporting growth were different between the two species, U. pertusa grew more rapidly and had higher N demands than G. tenuistipitata var. liui did.

关键词： nitrogen pools storage macroalgae

Immunogenicity of C-terminus of Plasmodium falciparum Merozoite Surface Protein 1 Expressed as a Non-glycosylated Polypeptide in Yeast

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Acta Biochimica et Biophysica Sinica 2006年第6期38卷 403-409页

作者： Zhong-Guang ZHANG Wen-Gang YU Wen-Sheng QIU Heng-Mei ZHAO Medical College of qingdao university,qingdao 266021,China Medical College of qingdao universityqingdao 266021 China

The C-terminal region of the merozoite surface protein 1 (MSP119) is one of the mostpromising vaccine candidates against the erythrocytic forms of *** the present study,a gene encodingPlasmodium falciparum MSP119 was expressed in yeast Pichia pastoris.A non-glycosylated form of therecombinant protein MSP119 was purified from culture *** recombinant protein maintains *** immune responses were seen in C57BL/6 mice after the second ***,the specific antibodies recognized the native antigens of ***,The prevailing isotypesof immunoglobulin （Ig）G associated with immunization were IgG1,IgG2a and *** antibodiesisolated from mouse sera immunized with MSP119 can inhibit parasite growth in *** on theseimmunological studies,we concluded that MSP119 deserves further evaluation in pre-clinical immunizationsagainst ***.

关键词： Plasmodium falciparum C-terminal region of merozoite surface protein 1(MSP119) Pichia pastoris immunity

The effect of multiple pairs of meta-dicarboxyl groups on molecular self-assembly and the selective adsorption of coronene by hydrogen bonding and van der Waals forces

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Nano Research 2022年第2期15卷 1691-1697页

作者： Jianqiao Li Wendi Luo Siqi Zhang Chunyu Ma Xunwen Xiao Wubiao Duan qingdao Zeng CAS Key Laboratory of Standardization and Measurement for Nanotechnology CAS Center for Excellence in NanoscienceNational Center for Nanoscience and Technology(NCNST)Beijing 100190China Department of Chemistry School of ScienceBeijing Jiaotong UniversityBeijing 100044China School of Materials and Chemical Engineering Ningbo University of TechnologyNingbo 315211China

The prediction of two-dimensional molecular self-assembly structures has always been a problem to be *** molecules with meta-dicarboxyl groups can self-assemble into a specific hexagonal cavity,which has an important influence on the prediction of molecular self-assembly structures and the application of functional molecules with meta-dicarboxyl *** kinds of molecules with four pairs of meta-dicarboxyl groups,1,3,6,8-tet「akis(3,5-isophthalic acid)pyrene(H_(8)TIAPy)and 4′,4′",4′"",4""-(ethene-1,1,2,2-tetrayl)tetrakis(([1,1′-biphenyl]-3,5-dicarboxylic acid))(H8ETTB)molecules were chosen to observe the self-assembly behavior at the heptanoic acid/highly oriented pyrolytic graphite(HA/HOPG)interface.H8TIAPy molecules self-assembled into well-ordered quadrilateral structures and could be regulated into kagome networks with hexagonal pores by coronene(COR)molecules.H8ETTB molecules self-assembled into lamellar structures and transformed into acid-COR-acid-COR co-assembled structures at low concentration of COR solution and acid-COR dimer-acid-COR dimer co-assembled structures at high concentration of COR *** reason that H8ETTB molecules could not be regulated into hexagonal porous architecture was attributed to the steric hindrance by the similar length and width of H8ETTB *** H8ETTB templates had stronger adsorption for COR than that of hexaphenylbenzene(HPB),regardless of the order of molecular introduction.

关键词： meta-dicarboxyl groups hexagonal cavity selective adsorption self-assembly steric hindrance