Results 51 to 60 of about 300,802 (279)

Fast analysis method of strontium-90 after separation using crown ether resin

Radiation Medicine and Protection, 2022
Objective: To explore the separation condition for 90Sr using crown ether resin, in order to establish a fast method for analysis of 90Sr in food and environmental samples.
Fei Chen, Linlin Yan, Fei Gao, Xiao Ge, Qiang Xiong, Zhen Zhang, Feng Zhang, Jingguang Fan   +7 more
doaj   +1 more source

Synthesis and Characterization of Biocompatible Manganese‐Doped Titania Nanoparticles and Its Application to Single‐Cell Nanoencapsulation

Advanced Materials Interfaces, EarlyView.
Biocompatible Mn‐doped TiO2 nanozymes integrate TiO2 stability with Mn redox activity, enabling dopamine‐mediated cell‐surface polymerization and single‐cell nanoencapsulation while maintaining high colloidal stability, low ROS generation, and excellent cellular compatibility.
Filip Kozłowski, Nayoung Kim, Hyunwoo Choi, Geoffrey Daniel, Gulaim A. Seisenbaeva, Insung S. Choi, Vadim G. Kessler   +6 more
wiley   +1 more source

Ultra-Weak Photon Emission from Crown Ethers Exposed to Fenton’s Reagent Fe²⁺-H₂O₂

Molecules
We hypothesized that compounds containing ether linkages within their backbone structures, when exposed to hydroxyl radicals (•OH), can generate ultra-weak photon emission (UPE) as a result of the formation of triplet excited carbonyl species (3R=O*). To
Michał Nowak, Krzysztof Sasak, Anna Wlodarczyk, Izabela Grabska-Kobylecka, Agata Sarniak, Dariusz Nowak   +5 more
doaj   +1 more source

4-Methylanilinium perchlorate 18-crown-6 clathrate

Acta Crystallographica Section E, 2012
In the title compound, C7H10N+·ClO4−·C12H24O6, the 4-methylanilinium cation interacts with an 18-crown-6 molecule forming a rotator–stator-like structure through bifurcated N—H...(O,O) hydrogen bonds ...
Yu-Feng Wang
doaj   +1 more source

Phosphines Functionalized with Crown Ether Groups:  Synthesis and Study of Systems Incorporating 1,3-Xylyl-18-Crown-5 Units

, 2016
Hybrid phosphine crown ether molecules are obtained from Ph2PCl, PhP(OMe)2, or P(OPh)3 and the carbanions generated by a lithium/bromine exchange reaction between n-butyllithium and 5-bromo-1,3-xylyl-18-crown-5 or 5-bromo-2-methoxy-1,3-xylyl-18-crown-5 ...
Bruce N. Storhoff (3076257), Lisa A. Barg (3085269), Michael D. Carr (3081612), Robert W. Byrn (3076248), Daniel H. Nolan (3085272), John C. Huffman (2227687)   +5 more
core   +1 more source

The Preparatory (Anti)Bonding Character of Molecular Orbitals

Advanced Science, EarlyView.
Herein, a concept to qualitatively predict changes in bond dissociation energies upon reduction or oxidation of molecular compounds is introduced. Changing the population of so‐called preparatory molecular orbitals influences how molecular fragments are relaxing after bond cleavage, which is shown for isolated organometallic aluminum compounds as well ...
Jonas O. Wenzel, Johannes Werner, Pascal Weisenburger, Joachim Podlech, Ralf Köppe, Ingo Krossing, Dieter Fenske, Andreas Reiß, Claus Feldmann, Israel Fernández, Frank Breher   +10 more
wiley   +1 more source

Polyacrylonitrile/Crown Ether Composite Nanofibres With High Efficiency for Adsorbing Li(I): Experiments and Theoretical Calculations

Frontiers in Energy Research, 2021
Lithium, as the lightest alkali metal, is widely used in military and new energy applications. With the rapid growth in demand for lithium resources, it has become necessary to improve the effectiveness of extraction thereof.
Tao Ding, Qian Wu, Mianping Zheng, Zhen Nie, Min Li, Suping Peng, Yunsheng Wang, Xudong Yu, Cheng Qian, Si Tang, Mingliang Wang   +10 more
doaj   +1 more source

Tailoring Structure–Property Relationships in π‐Conjugated Heterocyclic Poly(arylene alkylene) Anion‐Exchange Membranes for High‐Performance Water Electrolysis

Advanced Science, EarlyView.
From passive to active ion transport: π‐conjugated heterocycles reconfigure the hydration environment and microphase morphology of p‐terphenyl‐based anion‐exchange membranes, enabling fast hydroxide transport and high‐performance water electrolysis. ABSTRACT Anion‐exchange membrane water electrolysis (AEMWE) is a promising technology for sustainable ...
Qian Wang, Riyang Huang, Wenzhe Zhao, Si Chen, Yunpeng Guo, Yang Wu, Yun Zhao, Patric Jannasch, Jingshuai Yang   +8 more
wiley   +1 more source

Reconstructed Bi‐Sn Interfacial Sites Coupled with a Supramolecular Cation Cage Enable Low K+ Acidic CO2 Electroreduction to Formate

Advanced Energy Materials, EarlyView.
Pyrochlore‐derived Bi–Sn interfaces enable selective CO2 electroreduction to HCOOH in strongly acidic media (pH = 1). Interfacial electronic coupling promotes *OCHO formation while suppressing hydrogen evolution. Cryptand‐driven cation regulation enriches interfacial K+, maintaining high HCOOH faradaic efficiency of 94% even at low K+ electrolyte ...
Abdelmoniem H. Abu‐Ghazala, Xin Huang, Hsiwen Wu, Paul A. Webley, Shixia Chen, Jun Wang, Jie Zhang   +6 more
wiley   +1 more source

Dimethyl 2-[24-acetyl-28-oxo-8,11,14-trioxa-24,27-diazapentacyclo[19.5.1.122,26.02,7.015,20]octacosa-2,4,6,15(20),16,18-hexaen-27-yl]but-2-enedioate

Acta Crystallographica Section E, 2012
The title compound, C31H34N2O9, is a product of the Michael addition of the cyclic secondary amine subunit of the (bispidino)aza-14-crown-4 ether to dimethyl acetylenedicarboxylate.
Truong Hong Hieu, Le Tuan Anh, Anatoly T. Soldatenkov, Nadezhda M. Kolyadina, Victor N. Khrustalev   +4 more
doaj   +1 more source