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An Adaptive Metal-Organic Framework Discriminates Xylene Isomers by Shape-Responsive Deformation.
Adv Mater
December 2024
Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, Zhejiang, 310058, China.
The separation of xylene isomers, especially para-xylene, is a crucial but challenging process in the chemical industry due to their similar molecular dimensions. Here, a flexible metal-organic framework, Ni(ina), (ina = isonicotinic acid) is employed to effectively discriminate xylene isomers. The adsorbent with adaptive deformation accommodates the shapes of isomer molecules, thereby translating their subtle shape differences into characteristic framework deformation energies.
View Article and Find Full Text PDFThermal Bistability of Magnetic Susceptibility, Light Absorption, Second Harmonic Generation, and Dielectric Properties in a Polar Spin-Crossover Iron-Rhenium Chain Material.
Angew Chem Int Ed Engl
November 2024
Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387, Kraków, Poland.
The bistability of multiple physical properties driven by external stimuli in a solid is a desired prerequisite for its application in memory devices with convenient data readout. We present a pathway for thermal bistability detectable in four physical properties: magnetic, light absorption, second-harmonic generation (SHG), and dielectric. We report a novel heterometallic (TBA){[Fe(phIN)][Re(CN)]} ⋅ (phIN) (1) (TBA=tetrabutylammonium cation, phIN=phenyl isonicotinate) cyanido-bridged chain material.
View Article and Find Full Text PDFRole of the Kölliker-Fuse/parabrachial complex in the generation of postinspiratory vagal and sympathetic nerve activities and their recruitment by hypoxemic stimuli in the rat.
J Neurophysiol
November 2024
Macquarie Medical School, Faculty of Medicine, Health and Human SciencesMacquarie University, Sydney, Australia.
Article Synopsis
- The study investigates how the Kölliker-Fuse/Parabrachial nuclei (KF-PBN) in rats regulates post-inspiratory (post-I) activities that affect respiratory efficiency during normal conditions and acute hypoxemia.
- When the KF-PBN was inhibited, researchers observed changes such as reduced phrenic nerve activity and abolished post-I vagal responses, indicating its role in managing these respiratory outputs.
- The findings suggest the KF-PBN is crucial for modulating post-I vagal activity but only partially involved in sympathetic nerve activity, implying multiple neural pathways are at play in respiratory-sympathetic coordination during stress.
Co-adsorbed self-assembled monolayer enables high-performance perovskite and organic solar cells.
Nat Commun
September 2024
Department of Materials Science and Engineering, Southern University of Science and Technology, 518055, Shenzhen, Guangdong Province, China.
Self-assembled monolayers (SAMs) have become pivotal in achieving high-performance perovskite solar cells (PSCs) and organic solar cells (OSCs) by significantly minimizing interfacial energy losses. In this study, we propose a co-adsorb (CA) strategy employing a novel small molecule, 2-chloro-5-(trifluoromethyl)isonicotinic acid (PyCA-3F), introducing at the buried interface between 2PACz and the perovskite/organic layers. This approach effectively diminishes 2PACz's aggregation, enhancing surface smoothness and increasing work function for the modified SAM layer, thereby providing a flattened buried interface with a favorable heterointerface for perovskite.
View Article and Find Full Text PDFSynthesis, Characterization, X-ray Molecular Structure, Antioxidant, Antifungal, and Allelopathic Activity of a New Isonicotinate-Derived -Tetraarylporphyrin.
Molecules
July 2024
Laboratory of Physical Chemistry of Materials (LR01ES19), Faculty of Science of Monastir, University of Monastir, Avenue de l'Environment, Monastir 5019, Tunisia.
The present article describes the synthesis of an isonicotinate-derived -arylporphyrin, that has been fully characterized by spectroscopic methods (including fluorescence spectroscopy), as well as elemental analysis and HR-MS. The structure of an -hexane monosolvate has been determined by single-crystal X-ray diffraction analysis. The radical scavenging activity of this new porphyrin against the 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical has been measured.
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