1. Enantiospecific Synthesis of α-Tertiary Amines: Ruthenium-Catalyzed Allylic Amination with Aqueous Ammonia 

   Papidocha, Sven M.; Wilke, Henrik R.; Patej, Kacper J.; et al. (2025)

   Journal of the American Chemical Society

   Ammonia stands out as the most available, cost-effective, and atom-economical source of nitrogen for organic synthesis. In the laboratory, it is safely and most conveniently handled in aqueous solution. Despite the advantages, the direct application of aqueous ammonia in the field of transition-metal catalysis remains a significant challenge. In this study, we report the first ruthenium-catalyzed allylic substitution using ammonia. The ...

   Journal Article

2. High-Precision Oxygen-Isotope Analysis of Iron (Oxyhydr)oxides Using High-Temperature Conversion Isotope Ratio Mass Spectrometry 

   Galili, Nir; Somlyay, Anna; Aquila, Giorgia; et al. (2025)

   Analytical Chemistry

   We introduce a novel high-precision method for oxygen-isotope analysis of iron (oxyhydr)oxides using high-temperature conversion isotope ratio mass spectrometry (HTC-IRMS). In this approach, a finely ground mixture of iron (oxyhydr)oxide and graphite is heated at 1450 degrees C in a helium flow environment, converting oxygen to CO gas with nearly 100% yield. Continuous-flow IRMS analysis of the liberated CO yields a precision of +/- 0.15 ...

   Journal Article

3. Guidelines for Accurate Device-Circuit Coupled Modeling for More Advanced Optimization of Power Electronic Switching Cell 

   Nagel, Michel; Kovacevic-Badstuebner, Ivana; Papadopoulos, Georgios; et al. (2024)

   2024 IEEE DESIGN METHODOLOGIES CONFERENCE, DMC

   This paper addresses the requirements for the trustful electromagnetic (EM)-circuit coupled modeling using an example of a PCB layout with a half-bridge configuration of two silicon carbide (SiC) power MOSFETs, gate drivers, decoupling and dc-capacitors. The general guidelines for: 1) the port definition of EM models, 2) the time-domain circuit simulator settings, 3) the approximations, which can be adopted by the EM solvers, and 4) the ...

   Conference Paper

4. Time-Aware Probabilistic Roadmaps for Multi-Query Path Planning in Dynamic Environments 

   Schlapbach, Julius; Schopferer, Simon (2024)

   2024 EIGHTH IEEE INTERNATIONAL CONFERENCE ON ROBOTIC COMPUTING, IRC 2024

   In the evolving landscape of robotic applications, there is an increasing demand for advanced path planning algorithms capable of navigating dynamic environments. Established sampling-based algorithms like Probabilistic Roadmaps (PRM/PRM*) or Rapidly-exploring Random Trees (RRT/RRT*) and their derivatives have marked significant progress in this domain. However, there remains room for improvements when it comes to effectively planning ...

   Conference Paper

5. Explanation for Oscillating Backbone Curves Based on Fractional Spectral Submanifolds 

   Bettini, Leonardo; Kaszas, Balint; Cenedese, Mattia; et al. (2024)

   Conference Proceedings of the Society for Experimental Mechanics Series

   The instantaneous relationship between frequency and amplitude (backbone curve) of a decaying trajectory represents an important feature of a system, as it provides information about the forced response, if forcing and damping are small. The backbone curve of a system can be directly approximated by the reduced dynamics on spectral submanifolds (SSMs) constructed either from governing equations or from data, without the necessity for ...

   Conference Paper

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