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Synthesis and Mesophase Properties of Intraanular Functionized Shape-persistent Macrocycles Containing Dibenzo[fg,op]naphthacenes

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Chemical Research in Chinese Universities 2007年第1期23卷 35-43页

作者： CHENG Xiao-hong HOEGER sigurd Key Laboratory of Medicinal Chemistry for Natural Resource Ministry of Education School of Chemistry and Material Engineering Yunnan University Kunming 650091 P. R. China University Karlsruhe Institute for Technic Chemistry and Polymer Chemistry Engesserstr. 18 76131 Karlsruhe Germany

On the basis of the C-C coupling reactions of dibenzo [ fg, op ] naphthacene bistriflate, which was obtained by the condensation of phenylacetates with 4-aryl-2,6-bis（2-bromo-4-methoxy-phenyl） pyrylium salts followed by palladium-catalyzed dehydrohalogenation, three shape-persistent macrocycles with dibenzonaphthacene corner pieces, a nanometer interior void, and intraanular oligoalkyl side groups were synthesized by the oxidative cyclization of the corresponding bisacetylenes under high-dilution conditions. Their thermotropic liquid crystalline properties were investigated by using polarizing microscopy and differential scanning calorimetry. All the three compounds showed nematic mesophases and belonged to discotic liquid crystals with inverted topology.

关键词： Dibenzo [ fg, op ] naphthacene Macrocycles Liquid crystal C-C coupling

Control structure comparison for three-product Petlyuk column

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Chinese Journal of Chemical Engineering 2018年第8期26卷 1621-1630页

作者： Shengkun Jia Xing Qian Xigang Yuan sigurd Skogestad School of Chemical Engineering and Technology Chemical Engineering Research Center Collaborative Innovation Center of Chemical Science and Engineering (Tianjin)State Key Laboratory of Chemical Engineering Tianjin University Department of Chemical Engineering Norwegian University of Science and Technology (NTNU)

The focus of this paper is to investigate different control structures(single-loop PI control) for a dividing wall(Petlyuk) column for separating ethanol, n-propanol and n-butanol. Four control structures are studied. All the results are simulations based on Aspen Plus. Control structure 1(CS1) is stabilizing control structure with only temperature controllers. CS2, CS3 and CS4, containing also composition controllers, are introduced to reduce the steady state composition deviations. CS2 adds a distillate composition controller(CCDB) on top of CS1. CS3 is much more complicated with three temperature-composition cascade controllers and in addition a selector to the reboiler duty to control the maximum controller output of light impurity composition control in side stream and bottom impurity control in the prefractionator. CS4 adds another high selector to control the light impurity in the sidestream. Surprisingly, when considering the dynamic and even steady state performance of the proposed control structures, CS1 proves to be the best control structure to handle feed disturbances inserted into the three-product Petlyuk column.

关键词： Distillation columns Automatic process control Computer-aided control system design Petlyuk columns

Leaching behavior of enrofloxacin in three different soils and the influence of a surfactant on its mobility

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Journal of Environmental Sciences 2012年第3期24卷 435-439页

作者： Zhiyong Yu Ayfer Yediler Min Yang sigurd Schulte-Hostede State Key Laboratory of Environmental Aquatic Chemistry Research Center for Eco-Environmental SciencesChinese Academy of Sciences Beijing 100085China Helmholtz Zentrum Muenchen German Research Center for Environmental HealthInstitute of Ecological Chemistrylngolstaedter Landstrasse.185764 NeuherbergGermany

The leaching behaviors of enrofloxacin （ENR）, a fluoroquinolone group antibiotic, in three different standard soils, namely sandy, loamy sand and sandy loam were investigated according to OECD guideline 312. In addition, the effects of tenside, sodium dodecylbenzenesulfonate （DBS） on the mobility of ENR in two different soils were studied. The mobility of ENR in all three standard soils was very similar and was mostly （98%） concentrated on the top 0-5 cm segment of the soils at pH 5.7. The DBS can enhance the mobility of ENR in soils but the impact was in general negligible under the studied conditions.

关键词： enrofloxacin leaching soil sodium dodecylbenzenesulfonate

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含长链亚烷基桥的芳炔类共轭大环的合成

高等学校化学学报 2007年第1期28卷 65-70页

作者：程晓红 Hoeger sigurd 云南大学化学科学与工程学院教育部化学自然资源药物化学重点实验室昆明650091 Institut für Technische Chemie und Polymerchemie Universitt KarlsruheEngesserstr

采用模板导向法高产率地合成了两个含长链亚烷基桥的芳炔类共轭大环.通过四碘化合物与单保护双炔化合物的四重Hagiraha偶合反应构建了环化所需要的复杂前体.通过相应的模板四炔衍生物的分子内G laser偶合反应环化得到大环.大环的结构用N... 详细信息

采用模板导向法高产率地合成了两个含长链亚烷基桥的芳炔类共轭大环.通过四碘化合物与单保护双炔化合物的四重Hagiraha偶合反应构建了环化所需要的复杂前体.通过相应的模板四炔衍生物的分子内G laser偶合反应环化得到大环.大环的结构用NMR,GPC及UV-V is表征确证.

关键词：大环芳炔基模板双轴向列相液晶

Condensation of pyrylium salts with mixed anhydrides:aryl ethers,aryl amines and sterically congested aromatics

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Organic Chemistry Frontiers 2022年第2期9卷 294-298页

作者： Daniel Grabowski Susanne Alef Steven Becker Ute Muller Gregor Schnakenburg sigurd Hoger aKekulé-Institut für Organische Chemie und Biochemie Rheinische Friedrich-Wilhelms-Universität BonnGerhard-Domagk-Str.153121 BonnGermany bInstitut für Anorganische Chemie Universität BonnGerhard-Domagk-Str.153121 BonnGermany

The condensation of easily accessible and widely functionalizable 2,4,6-triaryl pyrylium salts with mixed anhydrides,formed in situ fromα-functionalized sodium acetates and an anhydride solvent,leads in good yields to the corresponding 2,4,6-triaryl benzenes functionalized at their 1-position.4-(Trifluoromethyl)benzoic anhydride has been proven as being the solvent of choice and ortho-disubstituted diphenyl ethers,triphenyl amines and phenyl carbazoles with different functionalizations are *** addition,sterically hindered anthracene diacetate is condensed with two bis-bromophenyl pyrylium salts which leads after intramolecular Yamamoto coupling to *** these,the anthracene core is surrounded by phenylenes and protected from photooxidation,leading to a highly stable blue emitting material.

关键词： material. anhydride salts

MICROMECHANICS OF MACROELECTRONICS

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China Particuology 2005年第6期3卷 321-328页

作者： Zhigang Suo Joost Vlassa sigurd Wagner Division of Engineering and Appfied Sciences Harvard University Cambridge MA 02138 USA Department of Electrical Engineering and Princeton Institute for the Science and echnology of Materials Princeton University Princeton NJ 08544 USA

The advent of flat-panel displays has opened the era of macroelectronics. Enthusiasm is gathering to develop macroelectronics as a platform for many technologies, ranging from paper-like displays to thin-film solar cells, technologies that aim to address the essential societal needs for easily accessible information, renewable energy, and sustainable environment. The widespread use of these large structures will depend on their ruggedness, portability and low cost, attributes that will come from new material choices and new manufacturing processes. For example, thin-film devices on thin polymer substrates lend themselves to roll-to-roll fabrication, and impart flexibility to the products. These large structures will have diverse architectures, hybrid materials, and small features; their mechanical behavior during manufacturing and use poses significant challenges to the creation of the new technologies. This paper describes ongoing work in the emerging field of research-the mechanics of macroelectronics, with emphasis on the mechanical behavior at the scale of individual features, and over a long time.

关键词： macroelectronics flexible electronics ductility cracking adhesion thin films

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官能团化刚性大环的超分子化学

有机化学 2006年第5期26卷 733-743页

作者：程晓红鞠秀萍 HOEGER sigurd 云南大学化学与材料工程学院 Karlsruhe University Institut of Technical Chemistry and Polymerchemisty Engesserstr. 18 76131 Karlsruhe Germany

重点介绍具有纳米尺寸的苯炔刚性大环的超分子化学:包括聚集效应,主客体化学、液晶行为及二维、三维超分子结构等.

关键词：刚性大环官能团超分子化学聚集主客体化学液晶

Constructing Three-Phase Capillary Pressure Functions by Parameter Matching Using a Modified Ensemble Kalman Filter

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Communications in Computational Physics 2009年第6期6卷 24-48页

作者： Randi Holm Roland Kaufmann Elisabeth Iren Dale sigurd Aanonsen Gunnar E.Fladmark Magne Espedal Arne Skauge Centre for Integrated Petroleum Research/University of Bergen P.O.Box 78005020 BergenNorway

Usually extended two-phase capillary pressures are used in three-phase simulations,because three-phase capillary pressures are not possible or hard to *** this work three-phase capillary pressure surfaces are created by at pore network *** input parameters to this network model are found by matching two-phase capillary pressure *** matching is done with a slightly modified EnKF *** with three-phase capillary pressures are created and used as input to flow simulations.

关键词： Ensemble Kalman Filter(EnKF) three-phase porous media flow capillary pressure parameter matching

Synthesis and Liquid Crystalline Properties of Shape Persistent Macrocycles Containing Dibenzo[fg,op]naphthacenes: Discotic Liquid Crystals with Inverted Topology

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Synthesis and Liquid Crystalline Properties of Shape Persist...