[reaction: see text] Supramolecular enantiodifferentiation was studied by isothermal titration calorimetry in an effort to address the order-disorder distinction in the diastereomeric complexes formed from a chiral macrocyclic host and enantiomeric carboxylates. As a result, the association entropy component TDeltaS emerged as an indicator in the enantioselection of tartrate 14 and aspartate 15 by the macrocycle 13 containing two guanidinium anchor groups connected to each other by four urea units. The parent monotopic guanidinium compounds 1 or 2 did not show any enantioselection for chiral carboxylates.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1021/ol0605575 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Association between intraoperative fluid management and postoperative outcomes in living kidney donors: a retrospective cohort study.
Sci Rep
January 2025
Department of Anesthesiology and Pain Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, 81, Irwon-ro, Gangnam-gu, Seoul, 06351, Republic of Korea.
Optimal fluid strategy for laparoscopic donor nephrectomy (LDN) remains unclear. LDN has been a domain for liberal fluid management to ensure graft perfusion, but this can result in adverse outcomes due to fluid overload. We compared postoperative outcome of living kidney donors according to the intraoperative fluid management.
View Article and Find Full Text PDFA Resource-Efficient Multi-Entropy Fusion Method and Its Application for EEG-Based Emotion Recognition.
Entropy (Basel)
January 2025
School of Computer Science, Guangdong Polytechnic Normal University, Guangzhou 510665, China.
Emotion recognition is an advanced technology for understanding human behavior and psychological states, with extensive applications for mental health monitoring, human-computer interaction, and affective computing. Based on electroencephalography (EEG), the biomedical signals naturally generated by the brain, this work proposes a resource-efficient multi-entropy fusion method for classifying emotional states. First, Discrete Wavelet Transform (DWT) is applied to extract five brain rhythms, i.
View Article and Find Full Text PDFEnvironmental Performance, Financial Constraints, and Tax Avoidance Practices: Insights from FTSE All-Share Companies.
Entropy (Basel)
January 2025
School of Business, University of Leicester, Leicester LE2 1RQ, UK.
Through its initiative known as the Climate Change Act (2008), the Government of the United Kingdom encourages corporations to enhance their environmental performance with the significant aim of reducing targeted greenhouse gas emissions by the year 2050. Previous research has predominantly assessed this encouragement favourably, suggesting that improved environmental performance bolsters governmental efforts to protect the environment and fosters commendable corporate governance practices among companies. Studies indicate that organisations exhibiting strong corporate social responsibility (CSR), environmental, social, and governance (ESG) criteria, or high levels of environmental performance often engage in lower occurrences of tax avoidance.
View Article and Find Full Text PDFCryptanalysis of an Image Encryption Algorithm Using DNA Coding and Chaos.
Entropy (Basel)
January 2025
Electrical Engineering College, Heilongjiang University, Harbin 150080, China.
In recent years, many chaotic image encryption algorithms have been cracked by chosen plaintext attack. Therefore, the method of associating the key with the plaintext to resist the cryptanalysis has received extensive attention from designers. This paper proposes a new method of cryptanalysis for image encryption algorithms with a key associated with plaintext.
View Article and Find Full Text PDFMagnetocaloric Effect for a -Clock-Type System.
Entropy (Basel)
December 2024
Departamento de Física, Universidad Técnica Federico Santa María, Av. España 1680, Valparaíso 2390123, Chile.
In this work, we study the magnetocaloric effect (MCE) in a working substance corresponding to a square lattice of spins with possible orientations, known as the "-state clock model". When the -state clock model has Q≥5 possible configurations, it presents the famous Berezinskii-Kosterlitz-Thouless (BKT) phase associated with vortex states. We calculate the thermodynamic quantities using Monte Carlo simulations for even numbers, ranging from Q=2 to Q=8 spin orientations per site in a lattice.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!