A cyano-bridged coordination polymer (CP), K{Co[Fe(CN)]} {(K)}, insoluble in water was successfully solubilized by countercation exchange with MeN ions. On the one hand, the resultant powder remained insoluble after countercation exchange with NH or EtN ions. Powder X-ray diffraction measurements indicated that solubility was closely related to the crystal structures of the obtained powder after countercation exchange. The penetration of a countercation with an appropriate size into the framework resulted in solubilization by depolymerization. Countercation exchange with RMeN ions (R = Et, -Pr, or -Bu), which have an orthogonal projection size similar to that of the MeN ion, solubilized the framework. On the other hand, -HexMeN ions hardly penetrating the framework provided insoluble powder due to the longer alkyl chain. The solubilized cyano-bridged CPs exhibited higher catalytic activity for water oxidation.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1021/acs.inorgchem.4c05491 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Size and Shape Effect of Countercations on Depolymerization and Water Oxidation Catalysis of Cyano-Bridged Coordination Polymers.
Inorg Chem
March 2025
Chemistry and Bioengineering, Graduate School of Engineering, Osaka Metropolitan University, Sugimoto, Sumiyoshi-ku, Osaka 558-8585, Japan.
A cyano-bridged coordination polymer (CP), K{Co[Fe(CN)]} {(K)}, insoluble in water was successfully solubilized by countercation exchange with MeN ions. On the one hand, the resultant powder remained insoluble after countercation exchange with NH or EtN ions. Powder X-ray diffraction measurements indicated that solubility was closely related to the crystal structures of the obtained powder after countercation exchange.
View Article and Find Full Text PDFUnraveling the Structure and Properties of High-Concentration Aqueous Iron Oxide Nanocolloids Free of Steric Stabilizers.
J Am Chem Soc
March 2025
Department of Chemistry, Bar-Ilan University, Ramat Gan 5290002, Israel.
Aqueous colloids with a high concentration of nanoparticles and free of steric stabilizers are prospective soft materials, the engineering of which is still challenging. Herein, we prepared superparamagnetic colloids with very large, up to 1350 g/L concentration of 11 nm nanoparticles via Fe and Fe coprecipitation, water washing, purification using cation-exchange resin, and stabilization with a monolayer of citrate anions (ζ potential of diluted dispersions about -35 mV). XRD, XPS, Mössbauer, and FTIR spectra elucidated the defective reverse spinel structure of magnetite/maghemite (FeO/γ-FeO) with a reduced content of Fe cations.
View Article and Find Full Text PDFCorrection: Enhanced catalytic activity of solubilised species obtained by counter-cation exchange of K{Co [Fe(CN)]} for water oxidation.
Chem Sci
January 2025
Chemistry and Bioengineering, Graduate School of Engineering, Osaka Metropolitan University Sugimoto, Sumiyoshi-ku Osaka 558-8585 Japan
[This corrects the article DOI: 10.1039/D4SC04390A.].
View Article and Find Full Text PDFAdditive-Free Commercial Alumina Catalyzes the Halogen Exchange Reaction of Long Alkyl Halides in Batch and in Flow Processes.
ACS Org Inorg Au
December 2024
Instituto de Tecnología Química (Universitat Politècnica de València-Agencia Estatal Consejo Superior de Investigaciones Científicas), Avda. de los Naranjos s/n, 46022 València, Spain.
The synthesis of alkyl halides can be performed by simply halide exchange reactions between two different alkyl halides, catalyzed by aluminosilicates. Here, we show that commercially available alumina shows a superior catalytic activity for the halogen exchange reaction between long alkyl halides (more than 6 carbons), including fluorides, in either batch or flow modes. The catalytic activity of the solid alumina is modulated by alkaline countercations on the surface, and sodium-supported alumina shows the optimal performance for the iodo-bromo and iodo-fluoro exchange under inflow reaction conditions, after >24 h reaction time, without any external additive.
View Article and Find Full Text PDFPhotocurable Thiol-Ene/Nanocellulose Elastomeric Composites for Bioinspired and Fluorine-Free Superhydrophobic Surfaces.
ACS Appl Mater Interfaces
November 2024
Laboratory for Processing of Advanced Composites (LPAC), École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland.
Artificially prepared superhydrophobic surfaces toward a self-cleaning "lotus effect" and anticontamination performance have become critically important in the past few years. However, most approaches to create the required topology with a hierarchical roughness comprise several manufacturing steps of varying practicality. Moreover, the desired low surface energy is in most cases achieved with fluorinated moieties that are currently criticized due to biological and environmental hazards.
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!