The self-assembly of salt nanocrystals from chemical reactions inside liquid helium is reported for the first time. Reaction is initiated by an electron impacting a helium nanodroplet containing sodium atoms and SF6 molecules, leading to preferential production of energetically favorable structures based on the unit cell of crystalline NaF. These favorable structures are observed as magic number ions (anomalously intense peaks) in mass spectra and are seen in both cationic and anionic channels in mass spectra, for example, (NaF)n Na(+) and (NaF)n F(-) . In the case of anions the self-assembly is not directly initiated by electrons: the dominant process involves resonant electron-induced production of metastable electronically excited He(-) anions, which then initiate anionic chemistry by electron transfer.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4502967 | PMC |
| http://dx.doi.org/10.1002/anie.201409465 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Controlling the Hierarchical Assembly of DNA-Based Hexagonal Microstructures.
Small
December 2024
Department of Engineering Science, Graduate School of Informatics and Engineering, The University of Electro-Communications, 1-5-1 Chofugaoka, Chofu, Tokyo, 182-8585, Japan.
This paper discusses the controlled morphology of hierarchical liquid crystalline DNA assemblies. Through a process of heating and slow cooling, double-stranded DNAs (dsDNAs) having 23 complementary bases and two base overhangs (a pair of 25mer oligonucleotides) spontaneously assemble into micro-sized hexagonal platelets in a solution containing poly(ethylene glycol) (PEG) and salt. Remarkably, the addition of a shorter dsDNA with AA/TT overhangs (a pair of 18mer oligonucleotides) to a PEG-salt solution of 25mer DNA with AA/TT overhangs results in the formation of molecular tubes, each with a central blockage.
View Article and Find Full Text PDFSelf-Assembly Systems Based on Betaine-Type Hydrophobic Association Polymer Used in Acid Stimulation: Effects of Surfactant and Salt Ion.
ACS Omega
December 2024
College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu, Sichuan 610500, P. R. China.
Hydrophobic association polymers containing various functional groups have a great deal of application potential as a self-thickening agent in carbonate acidification, while the improvement of their viscosification ability under high temperature conditions remains a significant challenge. A kind of betaine-type hydrophobic association polymer (PASD) intended for use as an acid thickener was synthesized through aqueous solution polymerization with sulfobetaine and a soluble hydrophobic monomer. The structure of PASD was characterized by FT-IR and H NMR.
View Article and Find Full Text PDFMechanism and strategy of self-assembly of quaternary ammonium surfactant molecules to regulate pesticide droplet impact and wetting of hydrophobic surfaces.
Pest Manag Sci
December 2024
Shanxi Key Laboratory of Integrated Management of Agricultural Pests, College of Plant Protection, Shanxi Agricultural University, Taiyuan, China.
Background: Surfactants regulate the interaction between pesticide droplets and the surfaces of plants on which they are sprayed. The influence of the key structural functional groups of surfactants on the interaction between pesticide droplets and hydrophobic pear leaves has not been explored. The behavior of Imidacloprid (Imid) droplets regulated by cationic quaternary ammonium surfactants with different structures on hydrophobic pear leaves and their bouncing dynamics were studied.
View Article and Find Full Text PDFElectrostatic Tailoring of Freestanding Polymeric Films for Multifunctional Thermoelectrics, Hydrogels, and Actuators.
ACS Nano
December 2024
Technical University of Munich, TUM School of Natural Sciences, Department of Physics, Chair for Functional Materials, James-Franck-Str. 1, 85748 Garching, Germany.
Organic conducting polymer poly(3,4-ethylenedioxythiophene):poly(4-styrenesulfonate) (PEDOT:PSS) has garnered enormous attention in organic electronics due to its low-cost solution processability, highly tunable conductivity, superior mechanical flexibility, and good biocompatibility together with excellent atmospheric stability. Nevertheless, limited electrical properties and unfavorable water instability of pristine PEDOT:PSS film impede its further implementation in a broad spectrum of practical applications. In this work, the successful tailoring of the intrinsic electrostatic interaction within PEDOT:PSS and consequent optimized electrical properties are enabled by a simple yet effective ionic salt post-treatment strategy.
View Article and Find Full Text PDFAssembly of silver(I)-copper(I) bimetallic thiolate complexes assisted by phenylacetylene stabilizers.
Dalton Trans
December 2024
School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China.
Ag/Cu bimetallic clusters have been widely reported, but synthesis of such clusters simple self-assembly of heterometallic ions in air remains challenging due to the susceptibility of Cu ions to oxidation. In this study, protected by the phenylacetylene auxiliary ligand, we utilized [Cu(CHCN)]PF in conjunction with the (PrSAg) polymer to form Ag(I)-Cu(I) oligomer precursors, serving as the starting point for constructing a new [AgCu(PrS)(DPPM)](PF) cluster (DPPM = bis(diphenylphosphino)methane, Ag11-xCux, = 5-9). When the (PrSAg) precursor was replaced by (BuSAg), another cluster [AgCuS(BuS)(CHCN)](CHOH)(HO)(PF) (Ag21Cu4) was obtained.
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!