Results 51 to 60 of about 1,552,843 (326)

Elimination of Interionic Hydrogen Bonding in the Imidazolium-Based Ionic Liquids [PDF]

arXiv, 2021
Hydrogen bonding is a phenomenon of paramount importance in room-temperature ionic liquids. The presence or absence of the hydrogen bond drastically alternates self-diffusion, shear viscosity, phase transition points, and other key properties of a pure substance. For certain applications, the presence of cation-anion hydrogen bonding is undesirable. In
arxiv  

Spectroscopic Evidence for Clusters of Like‐Charged Ions in Ionic Liquids Stabilized by Cooperative Hydrogen Bonding

ChemPhysChem, 2016
Direct spectroscopic evidence for hydrogen‐bonded clusters of like‐charged ions is reported for ionic liquids. The measured infrared O−H vibrational bands of the hydroxyethyl groups in the cations can be assigned to the dispersion‐corrected DFT ...
A. Knorr, P. Stange, K. Fumino, F. Weinhold, R. Ludwig   +4 more
semanticscholar   +1 more source

Small-molecule ionic liquid-based adhesive with strong room-temperature adhesion promoted by electrostatic interaction

Nature Communications, 2022
Low-molecular-weight adhesives (LMWAs) possess many unique features compared to polymer adhesives. However, fabricating LMWAs with adhesion strengths higher than those of polymeric materials is a significant challenge, mainly because of the relatively ...
Jun Zhang, Wenxiang Wang, Yan Zhang, Q. Wei, Fei Han, Shengyi Dong, Dongqing Liu, Shiguo Zhang   +7 more
semanticscholar   +1 more source

The Saccharomyces cerevisiae amino acid transporter Lyp1 has a broad substrate spectrum

FEBS Letters, EarlyView.
In Saccharomyces cerevisiae, Yeast Amino acid Transporter family members mediate the import of amino acids, ranging from substrate specialists to generalists. Here, we show that the specialist transporter, Lyp1, has a broader substrate spectrum than previously described, with affinity constants spanning from micromolar to millimolar.
Foteini Karapanagioti, Sebastian Obermaier, Dirk J. Slotboom, Bert Poolman   +3 more
wiley   +1 more source

Ionic Liquid Stabilized Perovskite Solar Modules with Power Conversion Efficiency Exceeding 20%

Advanced Functional Materials, 2022
Metal‐halide perovskite solar cells (PSCs) exhibit outstanding power conversion efficiencies (PCEs) when fabricated as mm‐sized devices, but creation of high‐performing large‐area modules that are stable on a sufficiently long timescale still presents a ...
Yulong Wang, Yufei Yang, Neng Li, Min Hu, Sonia R. Raga, Yang Jiang, Chao Wang, Xiaoli Zhang, M. Lira-Cantú, Fuzhi Huang, Yiyao Cheng, Jianfeng Lu   +11 more
semanticscholar   +1 more source

The carboxylate “gripper” of the substrate is critical for C‐4 stereo‐inversion by UDP‐glucuronic acid 4‐epimerase

FEBS Letters, EarlyView.
UDP‐glucuronic acid 4‐epimerase (UGAepi) catalyzes NAD+‐dependent interconversion of UDP‐glucuronic acid (UDP‐GlcA) and UDP‐galacturonic acid (UDP‐GalA) via C4‐oxidation, 4‐keto‐intermediate rotation, and C4‐reduction. Here, Borg et al. examined the role of the substrate's carboxylate group in the enzymic mechanism by analyzing NADH‐dependent reduction
Annika J. E. Borg, Laura De Cnop, Bernd Nidetzky   +2 more
wiley   +1 more source

Chemistry Games in the Classroom: A Pilot Study [PDF]

Journal of Research in Science, Mathematics and Technology Education, 2018
In this study a game-based learning approach was introduced among students and teachers. Several chemistry games and a survey method were used as a tool to obtain insight into students’ knowledge about ionic bonding, to learn about the students’ and ...
Marina Stojanovska, Blaga Velevska
doaj   +1 more source

Molecular Liquids versus Ionic Liquids: The Interplay between Inter-Molecular and Intra-Molecular Hydrogen Bonding as Seen by Vaporisation Thermodynamics

Molecules, 2023
In this study, we determined the enthalpies of vaporisation for a suitable set of molecular and ionic liquids using modern techniques for vapour pressure measurements, such as the quartz crystal microbalance, thermogravimetric analysis (TGA), and gas ...
Sergey P. Verevkin, Dzmitry H. Zaitsau, Ralf Ludwig   +2 more
doaj   +1 more source

Theoretical Study of Lithium Ionic Conductors by Electronic Stress Tensor Density and Electronic Kinetic Energy Density [PDF]

Journal of Computational Chemistry, 37, 1924-1934 (2016), 2016
We analyze the electronic structure of lithium ionic conductors, ${\rm Li_3PO_4}$ and ${\rm Li_3PS_4}$, using the electronic stress tensor density and kinetic energy density with special focus on the ionic bonds among them. We find that, as long as we examine the pattern of the eigenvalues of the electronic stress tensor density, we cannot distinguish ...
arxiv   +1 more source

Development of the Bonding Representations Inventory to Identify Student Misconceptions about Covalent and Ionic Bonding Representations.

, 2014
Teachers use multiple representations to communicate the concepts of bonding, including Lewis structures, formulas, space-filling models, and 3D manipulatives. As students learn to interpret these multiple representations, they may develop misconceptions
C. Luxford, Stacey Lowery Bretz
semanticscholar   +1 more source