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Dr. Sebastian Sobottka Maite Nößler Dr. Andrew L. Ostericher Dr. Gunter Hermann Noah Z. Subat Julia Beerhues Dr. Margarethe Behr-van der Meer Dr. Lisa Suntrup Dr. Uta Albold Dr. Stephan Hohloch Dr. Jean Christophe Tremblay Prof. Dr. Biprajit Sarkar 《Chemistry (Weinheim an der Bergstrasse, Germany)》2020,26(6):1314-1327
Asymmetric platinum donor–acceptor complexes [(pimp)Pt(Q2−)] are presented in this work, in which pimp=[(2,4,6-trimethylphenylimino)methyl]pyridine and Q2−=catecholate-type donor ligands. The properties of the complexes are evaluated as a function of the donor ligands, and correlations are drawn among electrochemical, optical, and theoretical data. Special focus has been put on the spectroelectrochemical investigation of the complexes featuring sulfonyl-substituted phenylendiamide ligands, which show redox-induced linkage isomerism upon oxidation. Time-dependent density functional theory (TD-DFT) as well as electron flux density analysis have been employed to rationalize the optical spectra of the complexes and their reactivity. Compound 1 ([(pimp)Pt(Q2−)] with Q2−=3,5-di-tert-butylcatecholate) was shown to be an efficient photosensitizer for molecular oxygen and was subsequently employed in photochemical cross-dehydrogenative coupling (CDC) reactions. The results thus display new avenues for donor–acceptor systems, including their role as photocatalysts for organic transformations, and the possibility to introduce redox-induced linkage isomerism in these compounds through the use of sulfonamide substituents on the donor ligands. 相似文献
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Sarah W. Kamau Chapman Paul O. Hassa Sabine Koch-Schneidemann Brigitte von Rechenberg Margarethe Hofmann-Amtenbrink Benedikt Steitz Alke Petri-Fink Heinrich Hofmann Michael O. Hottiger 《Journal of magnetism and magnetic materials》2008
Primary cell lines are more difficult to transfect when compared to immortalized/transformed cell lines, and hence new techniques are required to enhance the transfection efficiency in these cells. We isolated and established primary cultures of synoviocytes, chondrocytes, osteoblasts, melanocytes, macrophages, lung fibroblasts, and embryonic fibroblasts. These cells differed in several properties, and hence were a good representative sample of cells that would be targeted for expression and delivery of therapeutic genes in vivo. The efficiency of gene delivery in all these cells was enhanced using polyethylenimine-coated polyMAG magnetic nanoparticles, and the rates (17–84.2%) surpassed those previously achieved using other methods, especially in cells that are difficult to transfect. The application of permanent and pulsating magnetic fields significantly enhanced the transfection efficiencies in synoviocytes, chondrocytes, osteoblasts, melanocytes and lung fibroblasts, within 5 min of exposure to these magnetic fields. This is an added advantage for future in vivo applications, where rapid gene delivery is required before systemic clearance or filtration of the gene vectors occurs. 相似文献
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The optimization of composite components with regard to minimum weight and maximum load bearing capacity in consideration of multiple constraints is an optimization problem of rather high complexity. Genetic Algorithms are a good choice for solving such problems. In this paper the formulation of a Genetic Algorithm for the simultaneous optimization of two thin walled, mechanically coupled composite pipes subjected to a combination of thermal and mechanical loads is presented. The optimization goal is the minimization of the total mass of the pipe arrangement taking into account multiple design constraints. It is shown that Genetic Algorithms are valueable tools for solving optimization problems with a large number of parameters. Furthermore, it is possible to find additional, perhaps practicable, close‐to‐optimal configurations as a byproduct of the optimization process. (© 2004 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim) 相似文献
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Kazuo Watanabe Yoshiyasu Matsumoto Margarethe Kampling Katharina Al-Shamery Hans-Joachim Freund 《Angewandte Chemie (International ed. in English)》1999,38(15):2192-2194
The mean size of the Pd clusters deposited on an Al2O3 thin film influences the efficiency of photodissociation of CD4 into CD3 and D as well as the photodesorpion upon irradiation with 193-nm laser light. The picture shows the degree of desorption on Pd clusters of various sizes (as well as on a Pd(111) single-crystal surface) as a function of temperature; the values given refer to the average thickness of the evaporated metal layer. 相似文献
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Thomas Nagel Margarethe Rammerstorfer 《Central European Journal of Operations Research》2009,17(2):111-129
Motivated by the frequently observed criticism of the regulatory practice arising from companies in the industries concerned,
we investigate the impact of regulation on investment behavior. Therefore, we model the investment timing and volume of a
firm acting in a regulated market. When capping prices, the regulatory authority imposes a price ceiling on market prices.
Accordingly, we use a real option approach where the price cap that limits possible future firm values enters the firm’s portfolio
in form of a short call option position. By comparing this framework to a competitive benchmark model, we derive an optimal
price setting rule for regulators. Moreover, it can be shown how deviations from this optimum affect the investment behavior
of firms.
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Margarethe v. Wrangell 《Fresenius' Journal of Analytical Chemistry》1930,82(6-7):224-226
Ohne Zusammenfassung 相似文献
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